class Prism::Translation::Ripper

此类提供了 prism 和 Ripper 之间的兼容层。它的工作原理是首先解析整个树,然后遍历它并执行每个 Ripper 回调。要使用此类,您可以将 `Prism::Translation::Ripper` 视为您将对待 `Ripper` 类的方式。

请注意,此类将服务于最常见的用例,但 Ripper 的 API 非常广泛且没有文档记录。它依赖于报告解析器在任何给定时间的状态。我们尽力在这里复制它,但由于它是一种不同的架构,因此不可能完美地复制 Ripper 的行为。

主要已知差异是我们可能在某些情况下省略分派某些事件。这会影响以下事件

  • on_assign_error

  • on_comma

  • on_ignored_nl

  • on_ignored_sp

  • on_kw

  • on_label_end

  • on_lbrace

  • on_lbracket

  • on_lparen

  • on_nl

  • on_op

  • on_operator_ambiguous

  • on_rbrace

  • on_rbracket

  • on_rparen

  • on_semicolon

  • on_sp

  • on_symbeg

  • on_tstring_beg

  • on_tstring_end

常量

BINARY_OPERATORS

所有 Ruby 二元运算符的列表。

EVENTS

此数组包含所有 ripper 事件的名称。

KEYWORDS

所有 Ruby 关键字的列表。

PARSER_EVENTS

此数组包含解析器事件的名称。

PARSER_EVENT_TABLE

这包含所有解析器事件及其对应元数的表。

SCANNER_EVENTS

此数组包含扫描器事件的名称。

SCANNER_EVENT_TABLE

这包含所有扫描器事件及其对应元数的表。

属性

column[R]

解析器当前的列号。

filename[R]

正在解析的源文件的文件名。

lineno[R]

解析器当前的行号。

source[R]

正在解析的源代码。

公共类方法

lex(src, filename = "-", lineno = 1, raise_errors: false) 点击切换源代码

对 Ruby 程序进行标记化,并返回一个数组的数组,其格式为 `[[lineno, column], type, token, state]`。 `filename` 参数大多被忽略。默认情况下,此方法不处理 `src` 中的语法错误,请使用 `raise_errors` 关键字为 `src` 中的错误引发 SyntaxError。

require "ripper"
require "pp"

pp Ripper.lex("def m(a) nil end")
#=> [[[1,  0], :on_kw,     "def", FNAME    ],
     [[1,  3], :on_sp,     " ",   FNAME    ],
     [[1,  4], :on_ident,  "m",   ENDFN    ],
     [[1,  5], :on_lparen, "(",   BEG|LABEL],
     [[1,  6], :on_ident,  "a",   ARG      ],
     [[1,  7], :on_rparen, ")",   ENDFN    ],
     [[1,  8], :on_sp,     " ",   BEG      ],
     [[1,  9], :on_kw,     "nil", END      ],
     [[1, 12], :on_sp,     " ",   END      ],
     [[1, 13], :on_kw,     "end", END      ]]
# File prism/translation/ripper.rb, line 72
def self.lex(src, filename = "-", lineno = 1, raise_errors: false)
  result = Prism.lex_compat(src, filepath: filename, line: lineno)

  if result.failure? && raise_errors
    raise SyntaxError, result.errors.first.message
  else
    result.value
  end
end
new(source, filename = "(ripper)", lineno = 1) 点击切换源代码

使用给定的源创建新的 Translation::Ripper 对象。

# File prism/translation/ripper.rb, line 444
def initialize(source, filename = "(ripper)", lineno = 1)
  @source = source
  @filename = filename
  @lineno = lineno
  @column = 0
  @result = nil
end
parse(src, filename = "(ripper)", lineno = 1) 点击切换源代码

解析从 `src` 读取的给定 Ruby 程序。 `src` 必须是字符串、IO 或具有 gets 方法的对象。

# File prism/translation/ripper.rb, line 46
def self.parse(src, filename = "(ripper)", lineno = 1)
  new(src, filename, lineno).parse
end
sexp(src, filename = "-", lineno = 1, raise_errors: false) 点击切换源代码

解析 `src` 并创建 S-exp 树。返回比 Ripper.sexp_raw 更易读的树。此方法主要供开发人员使用。 `filename` 参数大多被忽略。默认情况下,此方法不处理 `src` 中的语法错误,在这种情况下返回 `nil`。使用 `raise_errors` 关键字为 `src` 中的错误引发 SyntaxError。

require "ripper"
require "pp"

pp Ripper.sexp("def m(a) nil end")
  #=> [:program,
       [[:def,
        [:@ident, "m", [1, 4]],
        [:paren, [:params, [[:@ident, "a", [1, 6]]], nil, nil, nil, nil, nil, nil]],
        [:bodystmt, [[:var_ref, [:@kw, "nil", [1, 9]]]], nil, nil, nil]]]]
# File prism/translation/ripper.rb, line 381
def self.sexp(src, filename = "-", lineno = 1, raise_errors: false)
  builder = SexpBuilderPP.new(src, filename, lineno)
  sexp = builder.parse
  if builder.error?
    if raise_errors
      raise SyntaxError, builder.error
    end
  else
    sexp
  end
end
sexp_raw(src, filename = "-", lineno = 1, raise_errors: false) 点击切换源代码

解析 `src` 并创建 S-exp 树。此方法主要供开发人员使用。 `filename` 参数大多被忽略。默认情况下,此方法不处理 `src` 中的语法错误,在这种情况下返回 `nil`。使用 `raise_errors` 关键字为 `src` 中的错误引发 SyntaxError。

require "ripper"
require "pp"

pp Ripper.sexp_raw("def m(a) nil end")
  #=> [:program,
       [:stmts_add,
        [:stmts_new],
        [:def,
         [:@ident, "m", [1, 4]],
         [:paren, [:params, [[:@ident, "a", [1, 6]]], nil, nil, nil]],
         [:bodystmt,
          [:stmts_add, [:stmts_new], [:var_ref, [:@kw, "nil", [1, 9]]]],
          nil,
          nil,
          nil]]]]
# File prism/translation/ripper.rb, line 416
def self.sexp_raw(src, filename = "-", lineno = 1, raise_errors: false)
  builder = SexpBuilder.new(src, filename, lineno)
  sexp = builder.parse
  if builder.error?
    if raise_errors
      raise SyntaxError, builder.error
    end
  else
    sexp
  end
end

公共实例方法

error?() 点击切换源代码

如果在解析过程中解析器遇到错误,则为 True。

# File prism/translation/ripper.rb, line 457
def error?
  result.failure?
end
parse() 点击切换源代码

解析源代码并返回结果。

# File prism/translation/ripper.rb, line 462
def parse
  result.comments.each do |comment|
    location = comment.location
    bounds(location)

    if comment.is_a?(InlineComment)
      on_comment(comment.slice)
    else
      offset = location.start_offset
      lines = comment.slice.lines

      lines.each_with_index do |line, index|
        bounds(location.copy(start_offset: offset))

        if index == 0
          on_embdoc_beg(line)
        elsif index == lines.size - 1
          on_embdoc_end(line)
        else
          on_embdoc(line)
        end

        offset += line.bytesize
      end
    end
  end

  result.magic_comments.each do |magic_comment|
    on_magic_comment(magic_comment.key, magic_comment.value)
  end

  unless result.data_loc.nil?
    on___end__(result.data_loc.slice.each_line.first)
  end

  result.warnings.each do |warning|
    bounds(warning.location)

    if warning.level == :default
      warning(warning.message)
    else
      case warning.type
      when :ambiguous_first_argument_plus
        on_arg_ambiguous("+")
      when :ambiguous_first_argument_minus
        on_arg_ambiguous("-")
      when :ambiguous_slash
        on_arg_ambiguous("/")
      else
        warn(warning.message)
      end
    end
  end

  if error?
    result.errors.each do |error|
      location = error.location
      bounds(location)

      case error.type
      when :alias_argument
        on_alias_error("can't make alias for the number variables", location.slice)
      when :argument_formal_class
        on_param_error("formal argument cannot be a class variable", location.slice)
      when :argument_format_constant
        on_param_error("formal argument cannot be a constant", location.slice)
      when :argument_formal_global
        on_param_error("formal argument cannot be a global variable", location.slice)
      when :argument_formal_ivar
        on_param_error("formal argument cannot be an instance variable", location.slice)
      when :class_name, :module_name
        on_class_name_error("class/module name must be CONSTANT", location.slice)
      else
        on_parse_error(error.message)
      end
    end

    nil
  else
    result.value.accept(self)
  end
end
visit_alias_global_variable_node(node) 点击切换源代码

alias $foo $bar ^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 561
def visit_alias_global_variable_node(node)
  new_name = visit_alias_global_variable_node_value(node.new_name)
  old_name = visit_alias_global_variable_node_value(node.old_name)

  bounds(node.location)
  on_var_alias(new_name, old_name)
end
visit_alias_method_node(node) 点击切换源代码

alias foo bar ^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 551
def visit_alias_method_node(node)
  new_name = visit(node.new_name)
  old_name = visit(node.old_name)

  bounds(node.location)
  on_alias(new_name, old_name)
end
visit_alternation_pattern_node(node) 点击切换源代码

foo => bar | baz

^^^^^^^^^
# File prism/translation/ripper.rb, line 585
def visit_alternation_pattern_node(node)
  left = visit_pattern_node(node.left)
  right = visit_pattern_node(node.right)

  bounds(node.location)
  on_binary(left, :|, right)
end
visit_and_node(node) 点击切换源代码

a and b ^^^^^^^

# File prism/translation/ripper.rb, line 605
def visit_and_node(node)
  left = visit(node.left)
  right = visit(node.right)

  bounds(node.location)
  on_binary(left, node.operator.to_sym, right)
end
visit_arguments_node(node) 点击切换源代码

foo(bar)

^^^
# File prism/translation/ripper.rb, line 796
def visit_arguments_node(node)
  arguments, _ = visit_call_node_arguments(node, nil, false)
  arguments
end
visit_array_node(node) 点击切换源代码

^^

# File prism/translation/ripper.rb, line 615
def visit_array_node(node)
  case (opening = node.opening)
  when /^%w/
    opening_loc = node.opening_loc
    bounds(opening_loc)
    on_qwords_beg(opening)

    elements = on_qwords_new
    previous = nil

    node.elements.each do |element|
      visit_words_sep(opening_loc, previous, element)

      bounds(element.location)
      elements = on_qwords_add(elements, on_tstring_content(element.content))

      previous = element
    end

    bounds(node.closing_loc)
    on_tstring_end(node.closing)
  when /^%i/
    opening_loc = node.opening_loc
    bounds(opening_loc)
    on_qsymbols_beg(opening)

    elements = on_qsymbols_new
    previous = nil

    node.elements.each do |element|
      visit_words_sep(opening_loc, previous, element)

      bounds(element.location)
      elements = on_qsymbols_add(elements, on_tstring_content(element.value))

      previous = element
    end

    bounds(node.closing_loc)
    on_tstring_end(node.closing)
  when /^%W/
    opening_loc = node.opening_loc
    bounds(opening_loc)
    on_words_beg(opening)

    elements = on_words_new
    previous = nil

    node.elements.each do |element|
      visit_words_sep(opening_loc, previous, element)

      bounds(element.location)
      elements =
        on_words_add(
          elements,
          if element.is_a?(StringNode)
            on_word_add(on_word_new, on_tstring_content(element.content))
          else
            element.parts.inject(on_word_new) do |word, part|
              word_part =
                if part.is_a?(StringNode)
                  bounds(part.location)
                  on_tstring_content(part.content)
                else
                  visit(part)
                end

              on_word_add(word, word_part)
            end
          end
        )

      previous = element
    end

    bounds(node.closing_loc)
    on_tstring_end(node.closing)
  when /^%I/
    opening_loc = node.opening_loc
    bounds(opening_loc)
    on_symbols_beg(opening)

    elements = on_symbols_new
    previous = nil

    node.elements.each do |element|
      visit_words_sep(opening_loc, previous, element)

      bounds(element.location)
      elements =
        on_symbols_add(
          elements,
          if element.is_a?(SymbolNode)
            on_word_add(on_word_new, on_tstring_content(element.value))
          else
            element.parts.inject(on_word_new) do |word, part|
              word_part =
                if part.is_a?(StringNode)
                  bounds(part.location)
                  on_tstring_content(part.content)
                else
                  visit(part)
                end

              on_word_add(word, word_part)
            end
          end
        )

      previous = element
    end

    bounds(node.closing_loc)
    on_tstring_end(node.closing)
  else
    bounds(node.opening_loc)
    on_lbracket(opening)

    elements = visit_arguments(node.elements) unless node.elements.empty?

    bounds(node.closing_loc)
    on_rbracket(node.closing)
  end

  bounds(node.location)
  on_array(elements)
end
visit_array_pattern_node(node) 点击切换源代码

foo => [bar]

^^^^^
# File prism/translation/ripper.rb, line 775
def visit_array_pattern_node(node)
  constant = visit(node.constant)
  requireds = visit_all(node.requireds) if node.requireds.any?
  rest =
    if (rest_node = node.rest).is_a?(SplatNode)
      if rest_node.expression.nil?
        bounds(rest_node.location)
        on_var_field(nil)
      else
        visit(rest_node.expression)
      end
    end

  posts = visit_all(node.posts) if node.posts.any?

  bounds(node.location)
  on_aryptn(constant, requireds, rest, posts)
end
visit_assoc_node(node) 点击切换源代码

{ a: 1 }

^^^^
# File prism/translation/ripper.rb, line 803
def visit_assoc_node(node)
  key = visit(node.key)
  value = visit(node.value)

  bounds(node.location)
  on_assoc_new(key, value)
end
visit_assoc_splat_node(node) 点击切换源代码

def foo(**); bar(**); end

^^

{ **foo }

^^^^^
# File prism/translation/ripper.rb, line 816
def visit_assoc_splat_node(node)
  value = visit(node.value)

  bounds(node.location)
  on_assoc_splat(value)
end
visit_back_reference_read_node(node) 点击切换源代码

$+ ^^

# File prism/translation/ripper.rb, line 825
def visit_back_reference_read_node(node)
  bounds(node.location)
  on_backref(node.slice)
end
visit_begin_node(node) 点击切换源代码

begin end ^^^^^^^^^

# File prism/translation/ripper.rb, line 832
def visit_begin_node(node)
  clauses = visit_begin_node_clauses(node.begin_keyword_loc, node, false)

  bounds(node.location)
  on_begin(clauses)
end
visit_block_argument_node(node) 点击切换源代码

foo(&bar)

^^^^
# File prism/translation/ripper.rb, line 896
def visit_block_argument_node(node)
  visit(node.expression)
end
visit_block_local_variable_node(node) 点击切换源代码

foo { |; bar| }

^^^
# File prism/translation/ripper.rb, line 902
def visit_block_local_variable_node(node)
  bounds(node.location)
  on_ident(node.name.to_s)
end
visit_block_node(node) 点击切换源代码

访问一个 BlockNode

# File prism/translation/ripper.rb, line 908
def visit_block_node(node)
  braces = node.opening == "{"
  parameters = visit(node.parameters)

  body =
    case node.body
    when nil
      bounds(node.location)
      stmts = on_stmts_add(on_stmts_new, on_void_stmt)

      bounds(node.location)
      braces ? stmts : on_bodystmt(stmts, nil, nil, nil)
    when StatementsNode
      stmts = node.body.body
      stmts.unshift(nil) if void_stmt?(node.parameters&.location || node.opening_loc, node.body.location, false)
      stmts = visit_statements_node_body(stmts)

      bounds(node.body.location)
      braces ? stmts : on_bodystmt(stmts, nil, nil, nil)
    when BeginNode
      visit_body_node(node.parameters&.location || node.opening_loc, node.body)
    else
      raise
    end

  if braces
    bounds(node.location)
    on_brace_block(parameters, body)
  else
    bounds(node.location)
    on_do_block(parameters, body)
  end
end
visit_block_parameter_node(node) 点击切换源代码

def foo(&bar); end

^^^^
# File prism/translation/ripper.rb, line 944
def visit_block_parameter_node(node)
  if node.name_loc.nil?
    bounds(node.location)
    on_blockarg(nil)
  else
    bounds(node.name_loc)
    name = visit_token(node.name.to_s)

    bounds(node.location)
    on_blockarg(name)
  end
end
visit_block_parameters_node(node) 点击切换源代码

一个代码块的参数。

# File prism/translation/ripper.rb, line 958
def visit_block_parameters_node(node)
  parameters =
    if node.parameters.nil?
      on_params(nil, nil, nil, nil, nil, nil, nil)
    else
      visit(node.parameters)
    end

  locals =
    if node.locals.any?
      visit_all(node.locals)
    else
      false
    end

  bounds(node.location)
  on_block_var(parameters, locals)
end
visit_break_node(node) 点击切换源代码

break ^^^^^

break foo ^^^^^^^^^

# File prism/translation/ripper.rb, line 982
def visit_break_node(node)
  if node.arguments.nil?
    bounds(node.location)
    on_break(on_args_new)
  else
    arguments = visit(node.arguments)

    bounds(node.location)
    on_break(arguments)
  end
end
visit_call_and_write_node(node) 点击切换源代码

foo.bar &&= baz ^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1194
def visit_call_and_write_node(node)
  receiver = visit(node.receiver)

  bounds(node.call_operator_loc)
  call_operator = visit_token(node.call_operator)

  bounds(node.message_loc)
  message = visit_token(node.message)

  bounds(node.location)
  target = on_field(receiver, call_operator, message)

  bounds(node.operator_loc)
  operator = on_op("&&=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_call_node(node) 点击切换源代码

foo ^^^

foo.bar ^^^^^^^

foo.bar() {} ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1002
def visit_call_node(node)
  if node.call_operator_loc.nil?
    case node.name
    when :[]
      receiver = visit(node.receiver)
      arguments, block = visit_call_node_arguments(node.arguments, node.block, trailing_comma?(node.arguments&.location || node.location, node.closing_loc))

      bounds(node.location)
      call = on_aref(receiver, arguments)

      if block.nil?
        call
      else
        bounds(node.location)
        on_method_add_block(call, block)
      end
    when :[]=
      receiver = visit(node.receiver)

      *arguments, last_argument = node.arguments.arguments
      arguments << node.block if !node.block.nil?

      arguments =
        if arguments.any?
          args = visit_arguments(arguments)

          if !node.block.nil?
            args
          else
            bounds(arguments.first.location)
            on_args_add_block(args, false)
          end
        end

      bounds(node.location)
      call = on_aref_field(receiver, arguments)
      value = visit_write_value(last_argument)

      bounds(last_argument.location)
      on_assign(call, value)
    when :-@, :+@, :~
      receiver = visit(node.receiver)

      bounds(node.location)
      on_unary(node.name, receiver)
    when :!
      receiver = visit(node.receiver)

      bounds(node.location)
      on_unary(node.message == "not" ? :not : :!, receiver)
    when *BINARY_OPERATORS
      receiver = visit(node.receiver)
      value = visit(node.arguments.arguments.first)

      bounds(node.location)
      on_binary(receiver, node.name, value)
    else
      bounds(node.message_loc)
      message = visit_token(node.message, false)

      if node.variable_call?
        on_vcall(message)
      else
        arguments, block = visit_call_node_arguments(node.arguments, node.block, trailing_comma?(node.arguments&.location || node.location, node.closing_loc || node.location))
        call =
          if node.opening_loc.nil? && arguments&.any?
            bounds(node.location)
            on_command(message, arguments)
          elsif !node.opening_loc.nil?
            bounds(node.location)
            on_method_add_arg(on_fcall(message), on_arg_paren(arguments))
          else
            bounds(node.location)
            on_method_add_arg(on_fcall(message), on_args_new)
          end

        if block.nil?
          call
        else
          bounds(node.block.location)
          on_method_add_block(call, block)
        end
      end
    end
  else
    receiver = visit(node.receiver)

    bounds(node.call_operator_loc)
    call_operator = visit_token(node.call_operator)

    message =
      if node.message_loc.nil?
        :call
      else
        bounds(node.message_loc)
        visit_token(node.message, false)
      end

    if node.name.end_with?("=") && !node.message.end_with?("=") && !node.arguments.nil? && node.block.nil?
      value = visit_write_value(node.arguments.arguments.first)

      bounds(node.location)
      on_assign(on_field(receiver, call_operator, message), value)
    else
      arguments, block = visit_call_node_arguments(node.arguments, node.block, trailing_comma?(node.arguments&.location || node.location, node.closing_loc || node.location))
      call =
        if node.opening_loc.nil?
          bounds(node.location)

          if node.arguments.nil? && !node.block.is_a?(BlockArgumentNode)
            on_call(receiver, call_operator, message)
          else
            on_command_call(receiver, call_operator, message, arguments)
          end
        else
          bounds(node.opening_loc)
          arguments = on_arg_paren(arguments)

          bounds(node.location)
          on_method_add_arg(on_call(receiver, call_operator, message), arguments)
        end

      if block.nil?
        call
      else
        bounds(node.block.location)
        on_method_add_block(call, block)
      end
    end
  end
end
visit_call_operator_write_node(node) 点击切换源代码

foo.bar += baz ^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1172
def visit_call_operator_write_node(node)
  receiver = visit(node.receiver)

  bounds(node.call_operator_loc)
  call_operator = visit_token(node.call_operator)

  bounds(node.message_loc)
  message = visit_token(node.message)

  bounds(node.location)
  target = on_field(receiver, call_operator, message)

  bounds(node.binary_operator_loc)
  operator = on_op("#{node.binary_operator}=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_call_or_write_node(node) 点击切换源代码

foo.bar ||= baz ^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1216
def visit_call_or_write_node(node)
  receiver = visit(node.receiver)

  bounds(node.call_operator_loc)
  call_operator = visit_token(node.call_operator)

  bounds(node.message_loc)
  message = visit_token(node.message)

  bounds(node.location)
  target = on_field(receiver, call_operator, message)

  bounds(node.operator_loc)
  operator = on_op("||=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_call_target_node(node) 点击切换源代码

foo.bar, = 1 ^^^^^^^

# File prism/translation/ripper.rb, line 1238
def visit_call_target_node(node)
  if node.call_operator == "::"
    receiver = visit(node.receiver)

    bounds(node.message_loc)
    message = visit_token(node.message)

    bounds(node.location)
    on_const_path_field(receiver, message)
  else
    receiver = visit(node.receiver)

    bounds(node.call_operator_loc)
    call_operator = visit_token(node.call_operator)

    bounds(node.message_loc)
    message = visit_token(node.message)

    bounds(node.location)
    on_field(receiver, call_operator, message)
  end
end
visit_capture_pattern_node(node) 点击切换源代码

foo => bar => baz

^^^^^^^^^^
# File prism/translation/ripper.rb, line 1263
def visit_capture_pattern_node(node)
  value = visit(node.value)
  target = visit(node.target)

  bounds(node.location)
  on_binary(value, :"=>", target)
end
visit_case_match_node(node) 点击切换源代码

case foo; in bar; end ^^^^^^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1286
def visit_case_match_node(node)
  predicate = visit(node.predicate)
  clauses =
    node.conditions.reverse_each.inject(visit(node.else_clause)) do |current, condition|
      on_in(*visit(condition), current)
    end

  bounds(node.location)
  on_case(predicate, clauses)
end
visit_case_node(node) 点击切换源代码

case foo; when bar; end ^^^^^^^^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1273
def visit_case_node(node)
  predicate = visit(node.predicate)
  clauses =
    node.conditions.reverse_each.inject(visit(node.else_clause)) do |current, condition|
      on_when(*visit(condition), current)
    end

  bounds(node.location)
  on_case(predicate, clauses)
end
visit_class_node(node) 点击切换源代码

class Foo; end ^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1299
def visit_class_node(node)
  constant_path =
    if node.constant_path.is_a?(ConstantReadNode)
      bounds(node.constant_path.location)
      on_const_ref(on_const(node.constant_path.name.to_s))
    else
      visit(node.constant_path)
    end

  superclass = visit(node.superclass)
  bodystmt = visit_body_node(node.superclass&.location || node.constant_path.location, node.body, node.superclass.nil?)

  bounds(node.location)
  on_class(constant_path, superclass, bodystmt)
end
visit_class_variable_and_write_node(node) 点击切换源代码

@@foo &&= bar ^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1352
def visit_class_variable_and_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_cvar(node.name.to_s))

  bounds(node.operator_loc)
  operator = on_op("&&=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_class_variable_operator_write_node(node) 点击切换源代码

@@foo += bar ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1338
def visit_class_variable_operator_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_cvar(node.name.to_s))

  bounds(node.binary_operator_loc)
  operator = on_op("#{node.binary_operator}=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_class_variable_or_write_node(node) 点击切换源代码

@@foo ||= bar ^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1366
def visit_class_variable_or_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_cvar(node.name.to_s))

  bounds(node.operator_loc)
  operator = on_op("||=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_class_variable_read_node(node) 点击切换源代码

@@foo ^^^^^

# File prism/translation/ripper.rb, line 1317
def visit_class_variable_read_node(node)
  bounds(node.location)
  on_var_ref(on_cvar(node.slice))
end
visit_class_variable_target_node(node) 点击切换源代码

@@foo, = bar ^^^^^

# File prism/translation/ripper.rb, line 1380
def visit_class_variable_target_node(node)
  bounds(node.location)
  on_var_field(on_cvar(node.name.to_s))
end
visit_class_variable_write_node(node) 点击切换源代码

@@foo = 1 ^^^^^^^^^

@@foo, @@bar = 1 ^^^^^ ^^^^^

# File prism/translation/ripper.rb, line 1327
def visit_class_variable_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_cvar(node.name.to_s))
  value = visit_write_value(node.value)

  bounds(node.location)
  on_assign(target, value)
end
visit_constant_and_write_node(node) 点击切换源代码

Foo &&= bar ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1422
def visit_constant_and_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_const(node.name.to_s))

  bounds(node.operator_loc)
  operator = on_op("&&=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_constant_operator_write_node(node) 点击切换源代码

Foo += bar ^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1408
def visit_constant_operator_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_const(node.name.to_s))

  bounds(node.binary_operator_loc)
  operator = on_op("#{node.binary_operator}=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_constant_or_write_node(node) 点击切换源代码

Foo ||= bar ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1436
def visit_constant_or_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_const(node.name.to_s))

  bounds(node.operator_loc)
  operator = on_op("||=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_constant_path_and_write_node(node) 点击切换源代码

Foo::Bar &&= baz ^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1523
def visit_constant_path_and_write_node(node)
  target = visit_constant_path_write_node_target(node.target)
  value = visit(node.value)

  bounds(node.operator_loc)
  operator = on_op("&&=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_constant_path_node(node) 点击切换源代码

Foo::Bar ^^^^^^^^

# File prism/translation/ripper.rb, line 1457
def visit_constant_path_node(node)
  if node.parent.nil?
    bounds(node.name_loc)
    child = on_const(node.name.to_s)

    bounds(node.location)
    on_top_const_ref(child)
  else
    parent = visit(node.parent)

    bounds(node.name_loc)
    child = on_const(node.name.to_s)

    bounds(node.location)
    on_const_path_ref(parent, child)
  end
end
visit_constant_path_operator_write_node(node) 点击切换源代码

Foo::Bar += baz ^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1509
def visit_constant_path_operator_write_node(node)
  target = visit_constant_path_write_node_target(node.target)
  value = visit(node.value)

  bounds(node.binary_operator_loc)
  operator = on_op("#{node.binary_operator}=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_constant_path_or_write_node(node) 点击切换源代码

Foo::Bar ||= baz ^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1537
def visit_constant_path_or_write_node(node)
  target = visit_constant_path_write_node_target(node.target)
  value = visit(node.value)

  bounds(node.operator_loc)
  operator = on_op("||=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_constant_path_target_node(node) 点击切换源代码

Foo::Bar, = baz ^^^^^^^^

# File prism/translation/ripper.rb, line 1551
def visit_constant_path_target_node(node)
  visit_constant_path_write_node_target(node)
end
visit_constant_path_write_node(node) 点击切换源代码

Foo::Bar = 1 ^^^^^^^^^^^^

Foo::Foo, Bar::Bar = 1 ^^^^^^^^ ^^^^^^^^

# File prism/translation/ripper.rb, line 1480
def visit_constant_path_write_node(node)
  target = visit_constant_path_write_node_target(node.target)
  value = visit_write_value(node.value)

  bounds(node.location)
  on_assign(target, value)
end
visit_constant_read_node(node) 点击切换源代码

Foo ^^^

# File prism/translation/ripper.rb, line 1387
def visit_constant_read_node(node)
  bounds(node.location)
  on_var_ref(on_const(node.name.to_s))
end
visit_constant_target_node(node) 点击切换源代码

Foo, = bar ^^^

# File prism/translation/ripper.rb, line 1450
def visit_constant_target_node(node)
  bounds(node.location)
  on_var_field(on_const(node.name.to_s))
end
visit_constant_write_node(node) 点击切换源代码

Foo = 1 ^^^^^^^

Foo, Bar = 1 ^^^ ^^^

# File prism/translation/ripper.rb, line 1397
def visit_constant_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_const(node.name.to_s))
  value = visit_write_value(node.value)

  bounds(node.location)
  on_assign(target, value)
end
visit_def_node(node) 点击切换源代码

def foo; end ^^^^^^^^^^^^

def self.foo; end ^^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1560
def visit_def_node(node)
  receiver = visit(node.receiver)
  operator =
    if !node.operator_loc.nil?
      bounds(node.operator_loc)
      visit_token(node.operator)
    end

  bounds(node.name_loc)
  name = visit_token(node.name_loc.slice)

  parameters =
    if node.parameters.nil?
      bounds(node.location)
      on_params(nil, nil, nil, nil, nil, nil, nil)
    else
      visit(node.parameters)
    end

  if !node.lparen_loc.nil?
    bounds(node.lparen_loc)
    parameters = on_paren(parameters)
  end

  bodystmt =
    if node.equal_loc.nil?
      visit_body_node(node.rparen_loc || node.end_keyword_loc, node.body)
    else
      body = visit(node.body.body.first)

      bounds(node.body.location)
      on_bodystmt(body, nil, nil, nil)
    end

  bounds(node.location)
  if receiver.nil?
    on_def(name, parameters, bodystmt)
  else
    on_defs(receiver, operator, name, parameters, bodystmt)
  end
end
visit_defined_node(node) 点击切换源代码

defined? a ^^^^^^^^^^

defined?(a) ^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1607
def visit_defined_node(node)
  bounds(node.location)
  on_defined(visit(node.value))
end
visit_else_node(node) 点击切换源代码

if foo then bar else baz end

^^^^^^^^^^^^
# File prism/translation/ripper.rb, line 1614
def visit_else_node(node)
  statements =
    if node.statements.nil?
      [nil]
    else
      body = node.statements.body
      body.unshift(nil) if void_stmt?(node.else_keyword_loc, node.statements.body[0].location, false)
      body
    end

  bounds(node.location)
  on_else(visit_statements_node_body(statements))
end
visit_embedded_statements_node(node) 点击切换源代码

“foo #{bar}”

^^^^^^
# File prism/translation/ripper.rb, line 1630
def visit_embedded_statements_node(node)
  bounds(node.opening_loc)
  on_embexpr_beg(node.opening)

  statements =
    if node.statements.nil?
      bounds(node.location)
      on_stmts_add(on_stmts_new, on_void_stmt)
    else
      visit(node.statements)
    end

  bounds(node.closing_loc)
  on_embexpr_end(node.closing)

  bounds(node.location)
  on_string_embexpr(statements)
end
visit_embedded_variable_node(node) 点击切换源代码

“foo #@bar”

^^^^^
# File prism/translation/ripper.rb, line 1651
def visit_embedded_variable_node(node)
  bounds(node.operator_loc)
  on_embvar(node.operator)

  variable = visit(node.variable)

  bounds(node.location)
  on_string_dvar(variable)
end
visit_ensure_node(node) 点击切换源代码

访问一个 EnsureNode 节点。

# File prism/translation/ripper.rb, line 1662
def visit_ensure_node(node)
  statements =
    if node.statements.nil?
      [nil]
    else
      body = node.statements.body
      body.unshift(nil) if void_stmt?(node.ensure_keyword_loc, body[0].location, false)
      body
    end

  statements = visit_statements_node_body(statements)

  bounds(node.location)
  on_ensure(statements)
end
visit_false_node(node) 点击切换源代码

false ^^^^^

# File prism/translation/ripper.rb, line 1680
def visit_false_node(node)
  bounds(node.location)
  on_var_ref(on_kw("false"))
end
visit_find_pattern_node(node) 点击切换源代码

foo => [*, bar, *]

^^^^^^^^^^^
# File prism/translation/ripper.rb, line 1687
def visit_find_pattern_node(node)
  constant = visit(node.constant)
  left =
    if node.left.expression.nil?
      bounds(node.left.location)
      on_var_field(nil)
    else
      visit(node.left.expression)
    end

  requireds = visit_all(node.requireds) if node.requireds.any?
  right =
    if node.right.expression.nil?
      bounds(node.right.location)
      on_var_field(nil)
    else
      visit(node.right.expression)
    end

  bounds(node.location)
  on_fndptn(constant, left, requireds, right)
end
visit_flip_flop_node(node) 点击切换源代码

if foo .. bar; end

^^^^^^^^^^
# File prism/translation/ripper.rb, line 1712
def visit_flip_flop_node(node)
  left = visit(node.left)
  right = visit(node.right)

  bounds(node.location)
  if node.exclude_end?
    on_dot3(left, right)
  else
    on_dot2(left, right)
  end
end
visit_float_node(node) 点击切换源代码

1.0 ^^^

# File prism/translation/ripper.rb, line 1726
def visit_float_node(node)
  visit_number_node(node) { |text| on_float(text) }
end
visit_for_node(node) 点击切换源代码

for foo in bar do end ^^^^^^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1732
def visit_for_node(node)
  index = visit(node.index)
  collection = visit(node.collection)
  statements =
    if node.statements.nil?
      bounds(node.location)
      on_stmts_add(on_stmts_new, on_void_stmt)
    else
      visit(node.statements)
    end

  bounds(node.location)
  on_for(index, collection, statements)
end
visit_forwarding_arguments_node(node) 点击切换源代码

def foo(…); bar(…); end

^^^
# File prism/translation/ripper.rb, line 1749
def visit_forwarding_arguments_node(node)
  bounds(node.location)
  on_args_forward
end
visit_forwarding_parameter_node(node) 点击切换源代码

def foo(…); end

^^^
# File prism/translation/ripper.rb, line 1756
def visit_forwarding_parameter_node(node)
  bounds(node.location)
  on_args_forward
end
visit_forwarding_super_node(node) 点击切换源代码

super ^^^^^

super {} ^^^^^^^^

# File prism/translation/ripper.rb, line 1766
def visit_forwarding_super_node(node)
  if node.block.nil?
    bounds(node.location)
    on_zsuper
  else
    block = visit(node.block)

    bounds(node.location)
    on_method_add_block(on_zsuper, block)
  end
end
visit_global_variable_and_write_node(node) 点击切换源代码

$foo &&= bar ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1815
def visit_global_variable_and_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_gvar(node.name.to_s))

  bounds(node.operator_loc)
  operator = on_op("&&=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_global_variable_operator_write_node(node) 点击切换源代码

$foo += bar ^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1801
def visit_global_variable_operator_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_gvar(node.name.to_s))

  bounds(node.binary_operator_loc)
  operator = on_op("#{node.binary_operator}=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_global_variable_or_write_node(node) 点击切换源代码

$foo ||= bar ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1829
def visit_global_variable_or_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_gvar(node.name.to_s))

  bounds(node.operator_loc)
  operator = on_op("||=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_global_variable_read_node(node) 点击切换源代码

$foo ^^^^

# File prism/translation/ripper.rb, line 1780
def visit_global_variable_read_node(node)
  bounds(node.location)
  on_var_ref(on_gvar(node.name.to_s))
end
visit_global_variable_target_node(node) 点击切换源代码

$foo, = bar ^^^^

# File prism/translation/ripper.rb, line 1843
def visit_global_variable_target_node(node)
  bounds(node.location)
  on_var_field(on_gvar(node.name.to_s))
end
visit_global_variable_write_node(node) 点击切换源代码

$foo = 1 ^^^^^^^^

$foo, $bar = 1 ^^^^ ^^^^

# File prism/translation/ripper.rb, line 1790
def visit_global_variable_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_gvar(node.name.to_s))
  value = visit_write_value(node.value)

  bounds(node.location)
  on_assign(target, value)
end
visit_hash_node(node) 点击切换源代码

{} ^^

# File prism/translation/ripper.rb, line 1850
def visit_hash_node(node)
  elements =
    if node.elements.any?
      args = visit_all(node.elements)

      bounds(node.elements.first.location)
      on_assoclist_from_args(args)
    end

  bounds(node.location)
  on_hash(elements)
end
visit_hash_pattern_node(node) 点击切换源代码

foo => {}

^^
# File prism/translation/ripper.rb, line 1865
def visit_hash_pattern_node(node)
  constant = visit(node.constant)
  elements =
    if node.elements.any? || !node.rest.nil?
      node.elements.map do |element|
        [
          if (key = element.key).opening_loc.nil?
            visit(key)
          else
            bounds(key.value_loc)
            if (value = key.value).empty?
              on_string_content
            else
              on_string_add(on_string_content, on_tstring_content(value))
            end
          end,
          visit(element.value)
        ]
      end
    end

  rest =
    case node.rest
    when AssocSplatNode
      visit(node.rest.value)
    when NoKeywordsParameterNode
      bounds(node.rest.location)
      on_var_field(visit(node.rest))
    end

  bounds(node.location)
  on_hshptn(constant, elements, rest)
end
visit_if_node(node) 点击切换源代码

if foo then bar end ^^^^^^^^^^^^^^^^^^^

bar if foo ^^^^^^^^^^

foo ? bar : baz ^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1907
def visit_if_node(node)
  if node.then_keyword == "?"
    predicate = visit(node.predicate)
    truthy = visit(node.statements.body.first)
    falsy = visit(node.subsequent.statements.body.first)

    bounds(node.location)
    on_ifop(predicate, truthy, falsy)
  elsif node.statements.nil? || (node.predicate.location.start_offset < node.statements.location.start_offset)
    predicate = visit(node.predicate)
    statements =
      if node.statements.nil?
        bounds(node.location)
        on_stmts_add(on_stmts_new, on_void_stmt)
      else
        visit(node.statements)
      end
    subsequent = visit(node.subsequent)

    bounds(node.location)
    if node.if_keyword == "if"
      on_if(predicate, statements, subsequent)
    else
      on_elsif(predicate, statements, subsequent)
    end
  else
    statements = visit(node.statements.body.first)
    predicate = visit(node.predicate)

    bounds(node.location)
    on_if_mod(predicate, statements)
  end
end
visit_imaginary_node(node) 点击切换源代码

1i ^^

# File prism/translation/ripper.rb, line 1943
def visit_imaginary_node(node)
  visit_number_node(node) { |text| on_imaginary(text) }
end
visit_implicit_node(node) 点击切换源代码

{ foo: }

^^^^
# File prism/translation/ripper.rb, line 1949
def visit_implicit_node(node)
end
visit_implicit_rest_node(node) 点击切换源代码

foo { |bar,| }

^
# File prism/translation/ripper.rb, line 1954
def visit_implicit_rest_node(node)
  bounds(node.location)
  on_excessed_comma
end
visit_in_node(node) 点击切换源代码

case foo; in bar; end ^^^^^^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1961
def visit_in_node(node)
  # This is a special case where we're not going to call on_in directly
  # because we don't have access to the subsequent. Instead, we'll return
  # the component parts and let the parent node handle it.
  pattern = visit_pattern_node(node.pattern)
  statements =
    if node.statements.nil?
      bounds(node.location)
      on_stmts_add(on_stmts_new, on_void_stmt)
    else
      visit(node.statements)
    end

  [pattern, statements]
end
visit_index_and_write_node(node) 点击切换源代码

foo &&= baz ^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1996
def visit_index_and_write_node(node)
  receiver = visit(node.receiver)
  arguments, _ = visit_call_node_arguments(node.arguments, node.block, trailing_comma?(node.arguments&.location || node.location, node.closing_loc))

  bounds(node.location)
  target = on_aref_field(receiver, arguments)

  bounds(node.operator_loc)
  operator = on_op("&&=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_index_operator_write_node(node) 点击切换源代码

foo += baz ^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 1979
def visit_index_operator_write_node(node)
  receiver = visit(node.receiver)
  arguments, _ = visit_call_node_arguments(node.arguments, node.block, trailing_comma?(node.arguments&.location || node.location, node.closing_loc))

  bounds(node.location)
  target = on_aref_field(receiver, arguments)

  bounds(node.binary_operator_loc)
  operator = on_op("#{node.binary_operator}=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_index_or_write_node(node) 点击切换源代码

foo ||= baz ^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2013
def visit_index_or_write_node(node)
  receiver = visit(node.receiver)
  arguments, _ = visit_call_node_arguments(node.arguments, node.block, trailing_comma?(node.arguments&.location || node.location, node.closing_loc))

  bounds(node.location)
  target = on_aref_field(receiver, arguments)

  bounds(node.operator_loc)
  operator = on_op("||=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_index_target_node(node) 点击切换源代码

foo, = 1 ^^^^^^^^

# File prism/translation/ripper.rb, line 2030
def visit_index_target_node(node)
  receiver = visit(node.receiver)
  arguments, _ = visit_call_node_arguments(node.arguments, node.block, trailing_comma?(node.arguments&.location || node.location, node.closing_loc))

  bounds(node.location)
  on_aref_field(receiver, arguments)
end
visit_instance_variable_and_write_node(node) 点击切换源代码

@foo &&= bar ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2072
def visit_instance_variable_and_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_ivar(node.name.to_s))

  bounds(node.operator_loc)
  operator = on_op("&&=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_instance_variable_operator_write_node(node) 点击切换源代码

@foo += bar ^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2058
def visit_instance_variable_operator_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_ivar(node.name.to_s))

  bounds(node.binary_operator_loc)
  operator = on_op("#{node.binary_operator}=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_instance_variable_or_write_node(node) 点击切换源代码

@foo ||= bar ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2086
def visit_instance_variable_or_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_ivar(node.name.to_s))

  bounds(node.operator_loc)
  operator = on_op("||=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_instance_variable_read_node(node) 点击切换源代码

@foo ^^^^

# File prism/translation/ripper.rb, line 2040
def visit_instance_variable_read_node(node)
  bounds(node.location)
  on_var_ref(on_ivar(node.name.to_s))
end
visit_instance_variable_target_node(node) 点击切换源代码

@foo, = bar ^^^^

# File prism/translation/ripper.rb, line 2100
def visit_instance_variable_target_node(node)
  bounds(node.location)
  on_var_field(on_ivar(node.name.to_s))
end
visit_instance_variable_write_node(节点) 点击切换源代码

@foo = 1 ^^^^^^^^

# File prism/translation/ripper.rb, line 2047
def visit_instance_variable_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_ivar(node.name.to_s))
  value = visit_write_value(node.value)

  bounds(node.location)
  on_assign(target, value)
end
visit_integer_node(节点) 点击切换源代码

1 ^

# File prism/translation/ripper.rb, line 2107
def visit_integer_node(node)
  visit_number_node(node) { |text| on_int(text) }
end
visit_interpolated_match_last_line_node(节点) 点击切换源代码

if /foo #{bar}/ then end

^^^^^^^^^^^^
# File prism/translation/ripper.rb, line 2113
def visit_interpolated_match_last_line_node(node)
  bounds(node.opening_loc)
  on_regexp_beg(node.opening)

  bounds(node.parts.first.location)
  parts =
    node.parts.inject(on_regexp_new) do |content, part|
      on_regexp_add(content, visit_string_content(part))
    end

  bounds(node.closing_loc)
  closing = on_regexp_end(node.closing)

  bounds(node.location)
  on_regexp_literal(parts, closing)
end
visit_interpolated_regular_expression_node(节点) 点击切换源代码

/foo #{bar}/ ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2132
def visit_interpolated_regular_expression_node(node)
  bounds(node.opening_loc)
  on_regexp_beg(node.opening)

  bounds(node.parts.first.location)
  parts =
    node.parts.inject(on_regexp_new) do |content, part|
      on_regexp_add(content, visit_string_content(part))
    end

  bounds(node.closing_loc)
  closing = on_regexp_end(node.closing)

  bounds(node.location)
  on_regexp_literal(parts, closing)
end
visit_interpolated_string_node(节点) 点击切换源代码

“foo #{bar}” ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2151
def visit_interpolated_string_node(node)
  if node.opening&.start_with?("<<~")
    heredoc = visit_heredoc_string_node(node)

    bounds(node.location)
    on_string_literal(heredoc)
  elsif !node.heredoc? && node.parts.length > 1 && node.parts.any? { |part| (part.is_a?(StringNode) || part.is_a?(InterpolatedStringNode)) && !part.opening_loc.nil? }
    first, *rest = node.parts
    rest.inject(visit(first)) do |content, part|
      concat = visit(part)

      bounds(part.location)
      on_string_concat(content, concat)
    end
  else
    bounds(node.parts.first.location)
    parts =
      node.parts.inject(on_string_content) do |content, part|
        on_string_add(content, visit_string_content(part))
      end

    bounds(node.location)
    on_string_literal(parts)
  end
end
visit_interpolated_symbol_node(节点) 点击切换源代码

:“foo #{bar}” ^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2179
def visit_interpolated_symbol_node(node)
  bounds(node.parts.first.location)
  parts =
    node.parts.inject(on_string_content) do |content, part|
      on_string_add(content, visit_string_content(part))
    end

  bounds(node.location)
  on_dyna_symbol(parts)
end
visit_interpolated_x_string_node(节点) 点击切换源代码

‘foo #{bar}` ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2192
def visit_interpolated_x_string_node(node)
  if node.opening.start_with?("<<~")
    heredoc = visit_heredoc_x_string_node(node)

    bounds(node.location)
    on_xstring_literal(heredoc)
  else
    bounds(node.parts.first.location)
    parts =
      node.parts.inject(on_xstring_new) do |content, part|
        on_xstring_add(content, visit_string_content(part))
      end

    bounds(node.location)
    on_xstring_literal(parts)
  end
end
visit_it_local_variable_read_node(节点) 点击切换源代码

-> { it }

^^
# File prism/translation/ripper.rb, line 2222
def visit_it_local_variable_read_node(node)
  bounds(node.location)
  on_vcall(on_ident(node.slice))
end
visit_it_parameters_node(节点) 点击切换源代码

-> { it } ^^^^^^^^^

# File prism/translation/ripper.rb, line 2229
def visit_it_parameters_node(node)
end
visit_keyword_hash_node(节点) 点击切换源代码

foo(bar: baz)

^^^^^^^^
# File prism/translation/ripper.rb, line 2234
def visit_keyword_hash_node(node)
  elements = visit_all(node.elements)

  bounds(node.location)
  on_bare_assoc_hash(elements)
end
visit_keyword_rest_parameter_node(节点) 点击切换源代码

def foo(**bar); end

^^^^^

def foo(**); end

^^
# File prism/translation/ripper.rb, line 2246
def visit_keyword_rest_parameter_node(node)
  if node.name_loc.nil?
    bounds(node.location)
    on_kwrest_param(nil)
  else
    bounds(node.name_loc)
    name = on_ident(node.name.to_s)

    bounds(node.location)
    on_kwrest_param(name)
  end
end
visit_lambda_node(节点) 点击切换源代码

-> {}

# File prism/translation/ripper.rb, line 2260
def visit_lambda_node(node)
  bounds(node.operator_loc)
  on_tlambda(node.operator)

  parameters =
    if node.parameters.is_a?(BlockParametersNode)
      # Ripper does not track block-locals within lambdas, so we skip
      # directly to the parameters here.
      params =
        if node.parameters.parameters.nil?
          bounds(node.location)
          on_params(nil, nil, nil, nil, nil, nil, nil)
        else
          visit(node.parameters.parameters)
        end

      if node.parameters.opening_loc.nil?
        params
      else
        bounds(node.parameters.opening_loc)
        on_paren(params)
      end
    else
      bounds(node.location)
      on_params(nil, nil, nil, nil, nil, nil, nil)
    end

  braces = node.opening == "{"
  if braces
    bounds(node.opening_loc)
    on_tlambeg(node.opening)
  end

  body =
    case node.body
    when nil
      bounds(node.location)
      stmts = on_stmts_add(on_stmts_new, on_void_stmt)

      bounds(node.location)
      braces ? stmts : on_bodystmt(stmts, nil, nil, nil)
    when StatementsNode
      stmts = node.body.body
      stmts.unshift(nil) if void_stmt?(node.parameters&.location || node.opening_loc, node.body.location, false)
      stmts = visit_statements_node_body(stmts)

      bounds(node.body.location)
      braces ? stmts : on_bodystmt(stmts, nil, nil, nil)
    when BeginNode
      visit_body_node(node.opening_loc, node.body)
    else
      raise
    end

  bounds(node.location)
  on_lambda(parameters, body)
end
visit_local_variable_and_write_node(节点) 点击切换源代码

foo &&= bar ^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2352
def visit_local_variable_and_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_ident(node.name_loc.slice))

  bounds(node.operator_loc)
  operator = on_op("&&=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_local_variable_operator_write_node(节点) 点击切换源代码

foo += bar ^^^^^^^^^^

# File prism/translation/ripper.rb, line 2338
def visit_local_variable_operator_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_ident(node.name_loc.slice))

  bounds(node.binary_operator_loc)
  operator = on_op("#{node.binary_operator}=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_local_variable_or_write_node(节点) 点击切换源代码

foo ||= bar ^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2366
def visit_local_variable_or_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_ident(node.name_loc.slice))

  bounds(node.operator_loc)
  operator = on_op("||=")
  value = visit_write_value(node.value)

  bounds(node.location)
  on_opassign(target, operator, value)
end
visit_local_variable_read_node(节点) 点击切换源代码

foo ^^^

# File prism/translation/ripper.rb, line 2320
def visit_local_variable_read_node(node)
  bounds(node.location)
  on_var_ref(on_ident(node.slice))
end
visit_local_variable_target_node(节点) 点击切换源代码

foo, = bar ^^^

# File prism/translation/ripper.rb, line 2380
def visit_local_variable_target_node(node)
  bounds(node.location)
  on_var_field(on_ident(node.name.to_s))
end
visit_local_variable_write_node(节点) 点击切换源代码

foo = 1 ^^^^^^^

# File prism/translation/ripper.rb, line 2327
def visit_local_variable_write_node(node)
  bounds(node.name_loc)
  target = on_var_field(on_ident(node.name_loc.slice))
  value = visit_write_value(node.value)

  bounds(node.location)
  on_assign(target, value)
end
visit_match_last_line_node(节点) 点击切换源代码

if /foo/ then end

^^^^^
# File prism/translation/ripper.rb, line 2387
def visit_match_last_line_node(node)
  bounds(node.opening_loc)
  on_regexp_beg(node.opening)

  bounds(node.content_loc)
  tstring_content = on_tstring_content(node.content)

  bounds(node.closing_loc)
  closing = on_regexp_end(node.closing)

  on_regexp_literal(on_regexp_add(on_regexp_new, tstring_content), closing)
end
visit_match_predicate_node(节点) 点击切换源代码

foo in bar ^^^^^^^^^^

# File prism/translation/ripper.rb, line 2402
def visit_match_predicate_node(node)
  value = visit(node.value)
  pattern = on_in(visit_pattern_node(node.pattern), nil, nil)

  on_case(value, pattern)
end
visit_match_required_node(节点) 点击切换源代码

foo => bar ^^^^^^^^^^

# File prism/translation/ripper.rb, line 2411
def visit_match_required_node(node)
  value = visit(node.value)
  pattern = on_in(visit_pattern_node(node.pattern), nil, nil)

  on_case(value, pattern)
end
visit_match_write_node(节点) 点击切换源代码

/(?<foo>foo)/ =~ bar ^^^^^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2420
def visit_match_write_node(node)
  visit(node.call)
end
visit_missing_node(节点) 点击切换源代码

语法树中缺失的节点。仅在出现语法错误时使用。

# File prism/translation/ripper.rb, line 2426
def visit_missing_node(node)
  raise "Cannot visit missing nodes directly."
end
visit_module_node(节点) 点击切换源代码

module Foo; end ^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2432
def visit_module_node(node)
  constant_path =
    if node.constant_path.is_a?(ConstantReadNode)
      bounds(node.constant_path.location)
      on_const_ref(on_const(node.constant_path.name.to_s))
    else
      visit(node.constant_path)
    end

  bodystmt = visit_body_node(node.constant_path.location, node.body, true)

  bounds(node.location)
  on_module(constant_path, bodystmt)
end
visit_multi_target_node(节点) 点击切换源代码

(foo, bar), bar = qux ^^^^^^^^^^

# File prism/translation/ripper.rb, line 2449
def visit_multi_target_node(node)
  bounds(node.location)
  targets = visit_multi_target_node_targets(node.lefts, node.rest, node.rights, true)

  if node.lparen_loc.nil?
    targets
  else
    bounds(node.lparen_loc)
    on_mlhs_paren(targets)
  end
end
visit_multi_write_node(节点) 点击切换源代码

foo, bar = baz ^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2503
def visit_multi_write_node(node)
  bounds(node.location)
  targets = visit_multi_target_node_targets(node.lefts, node.rest, node.rights, true)

  unless node.lparen_loc.nil?
    bounds(node.lparen_loc)
    targets = on_mlhs_paren(targets)
  end

  value = visit_write_value(node.value)

  bounds(node.location)
  on_massign(targets, value)
end
visit_next_node(节点) 点击切换源代码

next ^^^^

next foo ^^^^^^^^

# File prism/translation/ripper.rb, line 2523
def visit_next_node(node)
  if node.arguments.nil?
    bounds(node.location)
    on_next(on_args_new)
  else
    arguments = visit(node.arguments)

    bounds(node.location)
    on_next(arguments)
  end
end
visit_nil_node(节点) 点击切换源代码

nil ^^^

# File prism/translation/ripper.rb, line 2537
def visit_nil_node(node)
  bounds(node.location)
  on_var_ref(on_kw("nil"))
end
visit_no_keywords_parameter_node(节点) 点击切换源代码

def foo(**nil); end

^^^^^
# File prism/translation/ripper.rb, line 2544
def visit_no_keywords_parameter_node(node)
  bounds(node.location)
  on_nokw_param(nil)

  :nil
end
visit_numbered_parameters_node(节点) 点击切换源代码

-> { _1 + _2 } ^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2553
def visit_numbered_parameters_node(node)
end
visit_numbered_reference_read_node(节点) 点击切换源代码

$1 ^^

# File prism/translation/ripper.rb, line 2558
def visit_numbered_reference_read_node(node)
  bounds(node.location)
  on_backref(node.slice)
end
visit_optional_keyword_parameter_node(节点) 点击切换源代码

def foo(bar: baz); end

^^^^^^^^
# File prism/translation/ripper.rb, line 2565
def visit_optional_keyword_parameter_node(node)
  bounds(node.name_loc)
  name = on_label("#{node.name}:")
  value = visit(node.value)

  [name, value]
end
visit_optional_parameter_node(节点) 点击切换源代码

def foo(bar = 1); end

^^^^^^^
# File prism/translation/ripper.rb, line 2575
def visit_optional_parameter_node(node)
  bounds(node.name_loc)
  name = visit_token(node.name.to_s)
  value = visit(node.value)

  [name, value]
end
visit_or_node(节点) 点击切换源代码

a or b ^^^^^^

# File prism/translation/ripper.rb, line 2585
def visit_or_node(node)
  left = visit(node.left)
  right = visit(node.right)

  bounds(node.location)
  on_binary(left, node.operator.to_sym, right)
end
visit_parameters_node(节点) 点击切换源代码

def foo(bar, *baz); end

^^^^^^^^^
# File prism/translation/ripper.rb, line 2595
def visit_parameters_node(node)
  requireds = node.requireds.map { |required| required.is_a?(MultiTargetNode) ? visit_destructured_parameter_node(required) : visit(required) } if node.requireds.any?
  optionals = visit_all(node.optionals) if node.optionals.any?
  rest = visit(node.rest)
  posts = node.posts.map { |post| post.is_a?(MultiTargetNode) ? visit_destructured_parameter_node(post) : visit(post) } if node.posts.any?
  keywords = visit_all(node.keywords) if node.keywords.any?
  keyword_rest = visit(node.keyword_rest)
  block = visit(node.block)

  bounds(node.location)
  on_params(requireds, optionals, rest, posts, keywords, keyword_rest, block)
end
visit_parentheses_node(节点) 点击切换源代码

() ^^

(1) ^^^

# File prism/translation/ripper.rb, line 2622
def visit_parentheses_node(node)
  body =
    if node.body.nil?
      on_stmts_add(on_stmts_new, on_void_stmt)
    else
      visit(node.body)
    end

  bounds(node.location)
  on_paren(body)
end
visit_pinned_expression_node(节点) 点击切换源代码

foo => ^(bar)

^^^^^^
# File prism/translation/ripper.rb, line 2636
def visit_pinned_expression_node(node)
  expression = visit(node.expression)

  bounds(node.location)
  on_begin(expression)
end
visit_pinned_variable_node(节点) 点击切换源代码

foo = 1 and bar => ^foo

^^^^
# File prism/translation/ripper.rb, line 2645
def visit_pinned_variable_node(node)
  visit(node.variable)
end
visit_post_execution_node(节点) 点击切换源代码

END {} ^^^^^^

# File prism/translation/ripper.rb, line 2651
def visit_post_execution_node(node)
  statements =
    if node.statements.nil?
      bounds(node.location)
      on_stmts_add(on_stmts_new, on_void_stmt)
    else
      visit(node.statements)
    end

  bounds(node.location)
  on_END(statements)
end
visit_pre_execution_node(节点) 点击切换源代码

BEGIN {} ^^^^^^^^

# File prism/translation/ripper.rb, line 2666
def visit_pre_execution_node(node)
  statements =
    if node.statements.nil?
      bounds(node.location)
      on_stmts_add(on_stmts_new, on_void_stmt)
    else
      visit(node.statements)
    end

  bounds(node.location)
  on_BEGIN(statements)
end
visit_program_node(节点) 点击切换源代码

顶层程序节点。

# File prism/translation/ripper.rb, line 2680
def visit_program_node(node)
  body = node.statements.body
  body << nil if body.empty?
  statements = visit_statements_node_body(body)

  bounds(node.location)
  on_program(statements)
end
visit_range_node(节点) 点击切换源代码

0..5 ^^^^

# File prism/translation/ripper.rb, line 2691
def visit_range_node(node)
  left = visit(node.left)
  right = visit(node.right)

  bounds(node.location)
  if node.exclude_end?
    on_dot3(left, right)
  else
    on_dot2(left, right)
  end
end
visit_rational_node(节点) 点击切换源代码

1r ^^

# File prism/translation/ripper.rb, line 2705
def visit_rational_node(node)
  visit_number_node(node) { |text| on_rational(text) }
end
visit_redo_node(节点) 点击切换源代码

redo ^^^^

# File prism/translation/ripper.rb, line 2711
def visit_redo_node(node)
  bounds(node.location)
  on_redo
end
visit_regular_expression_node(节点) 点击切换源代码

/foo/ ^^^^^

# File prism/translation/ripper.rb, line 2718
def visit_regular_expression_node(node)
  bounds(node.opening_loc)
  on_regexp_beg(node.opening)

  if node.content.empty?
    bounds(node.closing_loc)
    closing = on_regexp_end(node.closing)

    on_regexp_literal(on_regexp_new, closing)
  else
    bounds(node.content_loc)
    tstring_content = on_tstring_content(node.content)

    bounds(node.closing_loc)
    closing = on_regexp_end(node.closing)

    on_regexp_literal(on_regexp_add(on_regexp_new, tstring_content), closing)
  end
end
visit_required_keyword_parameter_node(节点) 点击切换源代码

def foo(bar:); end

^^^^
# File prism/translation/ripper.rb, line 2740
def visit_required_keyword_parameter_node(node)
  bounds(node.name_loc)
  [on_label("#{node.name}:"), false]
end
visit_required_parameter_node(节点) 点击切换源代码

def foo(bar); end

^^^
# File prism/translation/ripper.rb, line 2747
def visit_required_parameter_node(node)
  bounds(node.location)
  on_ident(node.name.to_s)
end
visit_rescue_modifier_node(节点) 点击切换源代码

foo rescue bar ^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2754
def visit_rescue_modifier_node(node)
  expression = visit_write_value(node.expression)
  rescue_expression = visit(node.rescue_expression)

  bounds(node.location)
  on_rescue_mod(expression, rescue_expression)
end
visit_rescue_node(节点) 点击切换源代码

begin; rescue; end

^^^^^^^
# File prism/translation/ripper.rb, line 2764
def visit_rescue_node(node)
  exceptions =
    case node.exceptions.length
    when 0
      nil
    when 1
      if (exception = node.exceptions.first).is_a?(SplatNode)
        bounds(exception.location)
        on_mrhs_add_star(on_mrhs_new, visit(exception))
      else
        [visit(node.exceptions.first)]
      end
    else
      bounds(node.location)
      length = node.exceptions.length

      node.exceptions.each_with_index.inject(on_args_new) do |mrhs, (exception, index)|
        arg = visit(exception)

        bounds(exception.location)
        mrhs = on_mrhs_new_from_args(mrhs) if index == length - 1

        if exception.is_a?(SplatNode)
          if index == length - 1
            on_mrhs_add_star(mrhs, arg)
          else
            on_args_add_star(mrhs, arg)
          end
        else
          if index == length - 1
            on_mrhs_add(mrhs, arg)
          else
            on_args_add(mrhs, arg)
          end
        end
      end
    end

  reference = visit(node.reference)
  statements =
    if node.statements.nil?
      bounds(node.location)
      on_stmts_add(on_stmts_new, on_void_stmt)
    else
      visit(node.statements)
    end

  subsequent = visit(node.subsequent)

  bounds(node.location)
  on_rescue(exceptions, reference, statements, subsequent)
end
visit_rest_parameter_node(节点) 点击切换源代码

def foo(*bar); end

^^^^

def foo(*); end

^
# File prism/translation/ripper.rb, line 2822
def visit_rest_parameter_node(node)
  if node.name_loc.nil?
    bounds(node.location)
    on_rest_param(nil)
  else
    bounds(node.name_loc)
    on_rest_param(visit_token(node.name.to_s))
  end
end
visit_retry_node(节点) 点击切换源代码

retry ^^^^^

# File prism/translation/ripper.rb, line 2834
def visit_retry_node(node)
  bounds(node.location)
  on_retry
end
visit_return_node(节点) 点击切换源代码

return ^^^^^^

return 1 ^^^^^^^^

# File prism/translation/ripper.rb, line 2844
def visit_return_node(node)
  if node.arguments.nil?
    bounds(node.location)
    on_return0
  else
    arguments = visit(node.arguments)

    bounds(node.location)
    on_return(arguments)
  end
end
visit_self_node(节点) 点击切换源代码

self ^^^^

# File prism/translation/ripper.rb, line 2858
def visit_self_node(node)
  bounds(node.location)
  on_var_ref(on_kw("self"))
end
visit_shareable_constant_node(节点) 点击切换源代码

一个可共享的常量。

# File prism/translation/ripper.rb, line 2864
def visit_shareable_constant_node(node)
  visit(node.write)
end
visit_singleton_class_node(节点) 点击切换源代码

class << self; end ^^^^^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2870
def visit_singleton_class_node(node)
  expression = visit(node.expression)
  bodystmt = visit_body_node(node.body&.location || node.end_keyword_loc, node.body)

  bounds(node.location)
  on_sclass(expression, bodystmt)
end
visit_source_encoding_node(节点) 点击切换源代码

__ENCODING__ ^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 2880
def visit_source_encoding_node(node)
  bounds(node.location)
  on_var_ref(on_kw("__ENCODING__"))
end
visit_source_file_node(节点) 点击切换源代码

__FILE__ ^^^^^^^^

# File prism/translation/ripper.rb, line 2887
def visit_source_file_node(node)
  bounds(node.location)
  on_var_ref(on_kw("__FILE__"))
end
visit_source_line_node(节点) 点击切换源代码

__LINE__ ^^^^^^^^

# File prism/translation/ripper.rb, line 2894
def visit_source_line_node(node)
  bounds(node.location)
  on_var_ref(on_kw("__LINE__"))
end
visit_splat_node(节点) 点击切换源代码

foo(*bar)

^^^^

def foo((bar, *baz)); end

^^^^

def foo(*); bar(*); end

^
# File prism/translation/ripper.rb, line 2907
def visit_splat_node(node)
  visit(node.expression)
end
visit_statements_node(节点) 点击切换源代码

语句列表。

# File prism/translation/ripper.rb, line 2912
def visit_statements_node(node)
  bounds(node.location)
  visit_statements_node_body(node.body)
end
visit_string_node(节点) 点击切换源代码

“foo” ^^^^^

# File prism/translation/ripper.rb, line 2929
def visit_string_node(node)
  if (content = node.content).empty?
    bounds(node.location)
    on_string_literal(on_string_content)
  elsif (opening = node.opening) == "?"
    bounds(node.location)
    on_CHAR("?#{node.content}")
  elsif opening.start_with?("<<~")
    heredoc = visit_heredoc_string_node(node.to_interpolated)

    bounds(node.location)
    on_string_literal(heredoc)
  else
    bounds(node.content_loc)
    tstring_content = on_tstring_content(content)

    bounds(node.location)
    on_string_literal(on_string_add(on_string_content, tstring_content))
  end
end
visit_super_node(节点) 点击切换源代码

super(foo) ^^^^^^^^^^

# File prism/translation/ripper.rb, line 3061
def visit_super_node(node)
  arguments, block = visit_call_node_arguments(node.arguments, node.block, trailing_comma?(node.arguments&.location || node.location, node.rparen_loc || node.location))

  if !node.lparen_loc.nil?
    bounds(node.lparen_loc)
    arguments = on_arg_paren(arguments)
  end

  bounds(node.location)
  call = on_super(arguments)

  if block.nil?
    call
  else
    bounds(node.block.location)
    on_method_add_block(call, block)
  end
end
visit_symbol_node(节点) 点击切换源代码

:foo ^^^^

# File prism/translation/ripper.rb, line 3082
def visit_symbol_node(node)
  if (opening = node.opening)&.match?(/^%s|['"]:?$/)
    bounds(node.value_loc)
    content = on_string_content

    if !(value = node.value).empty?
      content = on_string_add(content, on_tstring_content(value))
    end

    on_dyna_symbol(content)
  elsif (closing = node.closing) == ":"
    bounds(node.location)
    on_label("#{node.value}:")
  elsif opening.nil? && node.closing_loc.nil?
    bounds(node.value_loc)
    on_symbol_literal(visit_token(node.value))
  else
    bounds(node.value_loc)
    on_symbol_literal(on_symbol(visit_token(node.value)))
  end
end
visit_true_node(节点) 点击切换源代码

true ^^^^

# File prism/translation/ripper.rb, line 3106
def visit_true_node(node)
  bounds(node.location)
  on_var_ref(on_kw("true"))
end
visit_undef_node(节点) 点击切换源代码

undef foo ^^^^^^^^^

# File prism/translation/ripper.rb, line 3113
def visit_undef_node(node)
  names = visit_all(node.names)

  bounds(node.location)
  on_undef(names)
end
visit_unless_node(节点) 点击切换源代码

unless foo; bar end ^^^^^^^^^^^^^^^^^^^

bar unless foo ^^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 3125
def visit_unless_node(node)
  if node.statements.nil? || (node.predicate.location.start_offset < node.statements.location.start_offset)
    predicate = visit(node.predicate)
    statements =
      if node.statements.nil?
        bounds(node.location)
        on_stmts_add(on_stmts_new, on_void_stmt)
      else
        visit(node.statements)
      end
    else_clause = visit(node.else_clause)

    bounds(node.location)
    on_unless(predicate, statements, else_clause)
  else
    statements = visit(node.statements.body.first)
    predicate = visit(node.predicate)

    bounds(node.location)
    on_unless_mod(predicate, statements)
  end
end
visit_until_node(节点) 点击切换源代码

until foo; bar end ^^^^^^^^^^^^^^^^^

bar until foo ^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 3153
def visit_until_node(node)
  if node.statements.nil? || (node.predicate.location.start_offset < node.statements.location.start_offset)
    predicate = visit(node.predicate)
    statements =
      if node.statements.nil?
        bounds(node.location)
        on_stmts_add(on_stmts_new, on_void_stmt)
      else
        visit(node.statements)
      end

    bounds(node.location)
    on_until(predicate, statements)
  else
    statements = visit(node.statements.body.first)
    predicate = visit(node.predicate)

    bounds(node.location)
    on_until_mod(predicate, statements)
  end
end
visit_when_node(节点) 点击切换源代码

case foo; when bar; end

^^^^^^^^^^^^^
# File prism/translation/ripper.rb, line 3177
def visit_when_node(node)
  # This is a special case where we're not going to call on_when directly
  # because we don't have access to the subsequent. Instead, we'll return
  # the component parts and let the parent node handle it.
  conditions = visit_arguments(node.conditions)
  statements =
    if node.statements.nil?
      bounds(node.location)
      on_stmts_add(on_stmts_new, on_void_stmt)
    else
      visit(node.statements)
    end

  [conditions, statements]
end
visit_while_node(节点) 点击切换源代码

while foo; bar end ^^^^^^^^^^^^^^^^^^

bar while foo ^^^^^^^^^^^^^

# File prism/translation/ripper.rb, line 3198
def visit_while_node(node)
  if node.statements.nil? || (node.predicate.location.start_offset < node.statements.location.start_offset)
    predicate = visit(node.predicate)
    statements =
      if node.statements.nil?
        bounds(node.location)
        on_stmts_add(on_stmts_new, on_void_stmt)
      else
        visit(node.statements)
      end

    bounds(node.location)
    on_while(predicate, statements)
  else
    statements = visit(node.statements.body.first)
    predicate = visit(node.predicate)

    bounds(node.location)
    on_while_mod(predicate, statements)
  end
end
visit_x_string_node(节点) 点击切换源代码

‘foo` ^^^^^

# File prism/translation/ripper.rb, line 3222
def visit_x_string_node(node)
  if node.unescaped.empty?
    bounds(node.location)
    on_xstring_literal(on_xstring_new)
  elsif node.opening.start_with?("<<~")
    heredoc = visit_heredoc_x_string_node(node.to_interpolated)

    bounds(node.location)
    on_xstring_literal(heredoc)
  else
    bounds(node.content_loc)
    content = on_tstring_content(node.content)

    bounds(node.location)
    on_xstring_literal(on_xstring_add(on_xstring_new, content))
  end
end
visit_yield_node(节点) 点击切换源代码

yield ^^^^^

yield 1 ^^^^^^^

# File prism/translation/ripper.rb, line 3245
def visit_yield_node(node)
  if node.arguments.nil? && node.lparen_loc.nil?
    bounds(node.location)
    on_yield0
  else
    arguments =
      if node.arguments.nil?
        bounds(node.location)
        on_args_new
      else
        visit(node.arguments)
      end

    unless node.lparen_loc.nil?
      bounds(node.lparen_loc)
      arguments = on_paren(arguments)
    end

    bounds(node.location)
    on_yield(arguments)
  end
end

私有实例方法

bounds(位置) 点击切换源代码

此方法负责更新行号和列信息以反映当前节点。

可以通过在每行开头进行一些缓存来大幅改进此方法,但目前来说已经足够好了。

# File prism/translation/ripper.rb, line 3375
def bounds(location)
  @lineno = location.start_line
  @column = location.start_column
end
command?(节点) 点击切换源代码

如果给定节点是命令节点,则返回 true。

# File prism/translation/ripper.rb, line 1163
        def command?(node)
  node.is_a?(CallNode) &&
    node.opening_loc.nil? &&
    (!node.arguments.nil? || node.block.is_a?(BlockArgumentNode)) &&
    !BINARY_OPERATORS.include?(node.name)
end
compile_error(msg) 点击切换源代码

当解析器发现语法错误时,调用此方法。

# File prism/translation/ripper.rb, line 3413
def compile_error(msg)
end
dedent_string(字符串, 宽度) 点击切换源代码

此方法由 Ripper C 扩展提供。当由于波浪号 heredoc 需要对字符串进行缩进时,会调用此方法。它应该就地修改字符串,并返回删除的字节数。

# File prism/translation/ripper.rb, line 3428
def dedent_string(string, width)
  whitespace = 0
  cursor = 0

  while cursor < string.length && string[cursor].match?(/\s/) && whitespace < width
    if string[cursor] == "\t"
      whitespace = ((whitespace / 8 + 1) * 8)
      break if whitespace > width
    else
      whitespace += 1
    end

    cursor += 1
  end

  string.replace(string[cursor..])
  cursor
end
result() 点击切换源代码

延迟初始化解析结果。

# File prism/translation/ripper.rb, line 3271
def result
  @result ||= Prism.parse(source, partial_script: true)
end
trailing_comma?(左侧, 右侧) 点击切换源代码

如果两个位置之间存在逗号,则返回 true。

# File prism/translation/ripper.rb, line 3280
def trailing_comma?(left, right)
  source.byteslice(left.end_offset...right.start_offset).include?(",")
end
visit_alias_global_variable_node_value(节点) 点击切换源代码

访问别名全局变量节点的一侧。

# File prism/translation/ripper.rb, line 570
        def visit_alias_global_variable_node_value(node)
  bounds(node.location)

  case node
  when BackReferenceReadNode
    on_backref(node.slice)
  when GlobalVariableReadNode
    on_gvar(node.name.to_s)
  else
    raise
  end
end
visit_arguments(元素) 点击切换源代码

访问元素列表,例如数组或参数的元素。

# File prism/translation/ripper.rb, line 756
        def visit_arguments(elements)
  bounds(elements.first.location)
  elements.inject(on_args_new) do |args, element|
    arg = visit(element)
    bounds(element.location)

    case element
    when BlockArgumentNode
      on_args_add_block(args, arg)
    when SplatNode
      on_args_add_star(args, arg)
    else
      on_args_add(args, arg)
    end
  end
end
visit_begin_node_clauses(位置, 节点, allow_newline) 点击切换源代码

访问 begin 节点的子句以形成 on_bodystmt 调用。

# File prism/translation/ripper.rb, line 840
        def visit_begin_node_clauses(location, node, allow_newline)
  statements =
    if node.statements.nil?
      on_stmts_add(on_stmts_new, on_void_stmt)
    else
      body = node.statements.body
      body.unshift(nil) if void_stmt?(location, node.statements.body[0].location, allow_newline)

      bounds(node.statements.location)
      visit_statements_node_body(body)
    end

  rescue_clause = visit(node.rescue_clause)
  else_clause =
    unless (else_clause_node = node.else_clause).nil?
      else_statements =
        if else_clause_node.statements.nil?
          [nil]
        else
          body = else_clause_node.statements.body
          body.unshift(nil) if void_stmt?(else_clause_node.else_keyword_loc, else_clause_node.statements.body[0].location, allow_newline)
          body
        end

      bounds(else_clause_node.location)
      visit_statements_node_body(else_statements)
    end
  ensure_clause = visit(node.ensure_clause)

  bounds(node.location)
  on_bodystmt(statements, rescue_clause, else_clause, ensure_clause)
end
visit_body_node(位置, 节点, allow_newline = false) 点击切换源代码

访问一个结构体的主体,该结构体可以包含一组语句,或者包含在 rescue/else/ensure 中的语句。

# File prism/translation/ripper.rb, line 875
        def visit_body_node(location, node, allow_newline = false)
  case node
  when nil
    bounds(location)
    on_bodystmt(visit_statements_node_body([nil]), nil, nil, nil)
  when StatementsNode
    body = [*node.body]
    body.unshift(nil) if void_stmt?(location, body[0].location, allow_newline)
    stmts = visit_statements_node_body(body)

    bounds(node.body.first.location)
    on_bodystmt(stmts, nil, nil, nil)
  when BeginNode
    visit_begin_node_clauses(location, node, allow_newline)
  else
    raise
  end
end
visit_call_node_arguments(arguments_node, block_node, trailing_comma) 点击切换源代码

访问调用节点的参数和代码块,并返回应使用的参数和代码块。

# File prism/translation/ripper.rb, line 1136
        def visit_call_node_arguments(arguments_node, block_node, trailing_comma)
  arguments = arguments_node&.arguments || []
  block = block_node

  if block.is_a?(BlockArgumentNode)
    arguments << block
    block = nil
  end

  [
    if arguments.length == 1 && arguments.first.is_a?(ForwardingArgumentsNode)
      visit(arguments.first)
    elsif arguments.any?
      args = visit_arguments(arguments)

      if block_node.is_a?(BlockArgumentNode) || arguments.last.is_a?(ForwardingArgumentsNode) || command?(arguments.last) || trailing_comma
        args
      else
        bounds(arguments.first.location)
        on_args_add_block(args, false)
      end
    end,
    visit(block)
  ]
end
visit_constant_path_write_node_target(node) 点击切换源代码

访问作为写入节点一部分的常量路径。

# File prism/translation/ripper.rb, line 1489
        def visit_constant_path_write_node_target(node)
  if node.parent.nil?
    bounds(node.name_loc)
    child = on_const(node.name.to_s)

    bounds(node.location)
    on_top_const_field(child)
  else
    parent = visit(node.parent)

    bounds(node.name_loc)
    child = on_const(node.name.to_s)

    bounds(node.location)
    on_const_path_field(parent, child)
  end
end
visit_destructured_parameter_node(node) 点击切换源代码

访问解构的位置参数节点。

# File prism/translation/ripper.rb, line 2609
        def visit_destructured_parameter_node(node)
  bounds(node.location)
  targets = visit_multi_target_node_targets(node.lefts, node.rest, node.rights, false)

  bounds(node.lparen_loc)
  on_mlhs_paren(targets)
end
visit_heredoc_node(parts, base) { |result, on_tstring_content(map(&:content).join)| ... } 点击切换源代码

访问使用 <<~ heredoc 表示的字符串。

# File prism/translation/ripper.rb, line 2980
        def visit_heredoc_node(parts, base)
  common_whitespace = visit_heredoc_node_whitespace(parts)

  if common_whitespace == 0
    bounds(parts.first.location)

    string = []
    result = base

    parts.each do |part|
      if part.is_a?(StringNode)
        if string.empty?
          string = [part]
        else
          string << part
        end
      else
        unless string.empty?
          bounds(string[0].location)
          result = yield result, on_tstring_content(string.map(&:content).join)
          string = []
        end

        result = yield result, visit(part)
      end
    end

    unless string.empty?
      bounds(string[0].location)
      result = yield result, on_tstring_content(string.map(&:content).join)
    end

    result
  else
    bounds(parts.first.location)
    result =
      parts.inject(base) do |string_content, part|
        yield string_content, visit_string_content(part)
      end

    bounds(parts.first.location)
    on_heredoc_dedent(result, common_whitespace)
  end
end
visit_heredoc_node_whitespace(parts) 点击切换源代码

Ripper 返回转义的字符串内容,但会去除常见的开头空白。 Prism 返回未转义的字符串内容以及转义字符串内容的位置。不幸的是,它们不能很好地协同工作,因此这里我们需要重新推导出常见的开头空白。

# File prism/translation/ripper.rb, line 2955
        def visit_heredoc_node_whitespace(parts)
  common_whitespace = nil
  dedent_next = true

  parts.each do |part|
    if part.is_a?(StringNode)
      if dedent_next && !(content = part.content).chomp.empty?
        common_whitespace = [
          common_whitespace || Float::INFINITY,
          content[/\A\s*/].each_char.inject(0) do |part_whitespace, char|
            char == "\t" ? ((part_whitespace / 8 + 1) * 8) : (part_whitespace + 1)
          end
        ].min
      end

      dedent_next = true
    else
      dedent_next = false
    end
  end

  common_whitespace || 0
end
visit_heredoc_string_node(node) 点击切换源代码

访问表示字符串的 heredoc 节点。

# File prism/translation/ripper.rb, line 3026
        def visit_heredoc_string_node(node)
  bounds(node.opening_loc)
  on_heredoc_beg(node.opening)

  bounds(node.location)
  result =
    visit_heredoc_node(node.parts, on_string_content) do |parts, part|
      on_string_add(parts, part)
    end

  bounds(node.closing_loc)
  on_heredoc_end(node.closing)

  result
end
visit_heredoc_x_string_node(node) 点击切换源代码

访问表示 xstring 的 heredoc 节点。

# File prism/translation/ripper.rb, line 3043
        def visit_heredoc_x_string_node(node)
  bounds(node.opening_loc)
  on_heredoc_beg(node.opening)

  bounds(node.location)
  result =
    visit_heredoc_node(node.parts, on_xstring_new) do |parts, part|
      on_xstring_add(parts, part)
    end

  bounds(node.closing_loc)
  on_heredoc_end(node.closing)

  result
end
visit_multi_target_node_targets(lefts, rest, rights, skippable) 点击切换源代码

访问多目标节点的目标。

# File prism/translation/ripper.rb, line 2462
        def visit_multi_target_node_targets(lefts, rest, rights, skippable)
  if skippable && lefts.length == 1 && lefts.first.is_a?(MultiTargetNode) && rest.nil? && rights.empty?
    return visit(lefts.first)
  end

  mlhs = on_mlhs_new

  lefts.each do |left|
    bounds(left.location)
    mlhs = on_mlhs_add(mlhs, visit(left))
  end

  case rest
  when nil
    # do nothing
  when ImplicitRestNode
    # these do not get put into the generated tree
    bounds(rest.location)
    on_excessed_comma
  else
    bounds(rest.location)
    mlhs = on_mlhs_add_star(mlhs, visit(rest))
  end

  if rights.any?
    bounds(rights.first.location)
    post = on_mlhs_new

    rights.each do |right|
      bounds(right.location)
      post = on_mlhs_add(post, visit(right))
    end

    mlhs = on_mlhs_add_post(mlhs, post)
  end

  mlhs
end
visit_number_node(node) { |slice| ... } 点击切换源代码

访问表示数字的节点。我们需要显式处理一元 - 运算符。

# File prism/translation/ripper.rb, line 3319
def visit_number_node(node)
  slice = node.slice
  location = node.location

  if slice[0] == "-"
    bounds(location.copy(start_offset: location.start_offset + 1))
    value = yield slice[1..-1]

    bounds(node.location)
    on_unary(:-@, value)
  else
    bounds(location)
    yield slice
  end
end
visit_pattern_node(node) 点击切换源代码

访问模式匹配中的模式。这用于绕过可以用来包装模式的括号节点。

# File prism/translation/ripper.rb, line 595
        def visit_pattern_node(node)
  if node.is_a?(ParenthesesNode)
    visit(node.body)
  else
    visit(node)
  end
end
visit_statements_node_body(body) 点击切换源代码

访问语句节点的语句列表。我们支持列表中的 nil 语句。这通常不会被 prism 解析树的结构允许,但我们在这里手动添加它们,以便我们可以镜像 Ripper 的 void stmt。

# File prism/translation/ripper.rb, line 2921
        def visit_statements_node_body(body)
  body.inject(on_stmts_new) do |stmts, stmt|
    on_stmts_add(stmts, stmt.nil? ? on_void_stmt : visit(stmt))
  end
end
visit_string_content(part) 点击切换源代码

访问类字符串节点的单个部分。

# File prism/translation/ripper.rb, line 2211
        def visit_string_content(part)
  if part.is_a?(StringNode)
    bounds(part.content_loc)
    on_tstring_content(part.content)
  else
    visit(part)
  end
end
visit_token(token, allow_keywords = true) 点击切换源代码

访问特定节点的字符串内容。此方法用于拆分为各种令牌类型。

# File prism/translation/ripper.rb, line 3292
def visit_token(token, allow_keywords = true)
  case token
  when "."
    on_period(token)
  when "`"
    on_backtick(token)
  when *(allow_keywords ? KEYWORDS : [])
    on_kw(token)
  when /^_/
    on_ident(token)
  when /^[[:upper:]]\w*$/
    on_const(token)
  when /^@@/
    on_cvar(token)
  when /^@/
    on_ivar(token)
  when /^\$/
    on_gvar(token)
  when /^[[:punct:]]/
    on_op(token)
  else
    on_ident(token)
  end
end
visit_words_sep(opening_loc, previous, current) 点击切换源代码

分派一个 words_sep 事件,其中包含列表字面量的元素之间的空格。

# File prism/translation/ripper.rb, line 745
        def visit_words_sep(opening_loc, previous, current)
  end_offset = (previous.nil? ? opening_loc : previous.location).end_offset
  start_offset = current.location.start_offset

  if end_offset != start_offset
    bounds(current.location.copy(start_offset: end_offset))
    on_words_sep(source.byteslice(end_offset...start_offset))
  end
end
visit_write_value(node) 点击切换源代码

访问表示写入值的节点。这用于处理不带括号生成的隐式数组的特殊情况。

# File prism/translation/ripper.rb, line 3337
def visit_write_value(node)
  if node.is_a?(ArrayNode) && node.opening_loc.nil?
    elements = node.elements
    length = elements.length

    bounds(elements.first.location)
    elements.each_with_index.inject((elements.first.is_a?(SplatNode) && length == 1) ? on_mrhs_new : on_args_new) do |args, (element, index)|
      arg = visit(element)
      bounds(element.location)

      if index == length - 1
        if element.is_a?(SplatNode)
          mrhs = index == 0 ? args : on_mrhs_new_from_args(args)
          on_mrhs_add_star(mrhs, arg)
        else
          on_mrhs_add(on_mrhs_new_from_args(args), arg)
        end
      else
        case element
        when BlockArgumentNode
          on_args_add_block(args, arg)
        when SplatNode
          on_args_add_star(args, arg)
        else
          on_args_add(args, arg)
        end
      end
    end
  else
    visit(node)
  end
end
void_stmt?(left, right, allow_newline) 点击切换源代码

如果两个位置之间存在分号,则返回 true。

# File prism/translation/ripper.rb, line 3285
def void_stmt?(left, right, allow_newline)
  pattern = allow_newline ? /[;\n]/ : /;/
  source.byteslice(left.end_offset...right.start_offset).match?(pattern)
end
warn(fmt, *args) 点击切换源代码

当解析器产生弱警告时调用此方法。 fmtargs 是 printf 风格。

# File prism/translation/ripper.rb, line 3404
def warn(fmt, *args)
end
warning(fmt, *args) 点击切换源代码

当解析器产生强警告时调用此方法。 fmtargs 是 printf 风格。

# File prism/translation/ripper.rb, line 3409
def warning(fmt, *args)
end