class Prism::Translation::RubyParser::Compiler
一个构建 Sexp 对象的 prism 访问器。
属性
这是我们正在编译的文件的名称。我们将其设置在生成的每个 Sexp 对象上,并且还使用它来编译 __FILE__ 节点。
类变量将根据它们是否在方法定义内部而改变其类型,因此我们需要跟踪该状态。
如果某些节点在模式内部,则它们的表示形式会发生变化,因此我们需要跟踪该状态。
公共类方法
使用给定的文件名初始化一个新的编译器。
# File prism/translation/ruby_parser.rb, line 31 def initialize(file, in_def: false, in_pattern: false) @file = file @in_def = in_def @in_pattern = in_pattern end
公共实例方法
alias $foo $bar ^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 45 def visit_alias_global_variable_node(node) s(node, :valias, node.new_name.name, node.old_name.name) end
alias foo bar ^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 39 def visit_alias_method_node(node) s(node, :alias, visit(node.new_name), visit(node.old_name)) end
foo => bar | baz
^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 51 def visit_alternation_pattern_node(node) s(node, :or, visit(node.left), visit(node.right)) end
a and b ^^^^^^^
# File prism/translation/ruby_parser.rb, line 57 def visit_and_node(node) left = visit(node.left) if left[0] == :and # ruby_parser has the and keyword as right-associative as opposed to # prism which has it as left-associative. We reverse that # associativity here. nest = left nest = nest[2] while nest[2][0] == :and nest[2] = s(node, :and, nest[2], visit(node.right)) left else s(node, :and, left, visit(node.right)) end end
foo(bar)
^^^
# File prism/translation/ruby_parser.rb, line 108 def visit_arguments_node(node) raise "Cannot visit arguments directly" end
-
^^
# File prism/translation/ruby_parser.rb, line 75 def visit_array_node(node) if in_pattern s(node, :array_pat, nil).concat(visit_all(node.elements)) else s(node, :array).concat(visit_all(node.elements)) end end
foo => [bar]
^^^^^
# File prism/translation/ruby_parser.rb, line 85 def visit_array_pattern_node(node) if node.constant.nil? && node.requireds.empty? && node.rest.nil? && node.posts.empty? s(node, :array_pat) else result = s(node, :array_pat, visit_pattern_constant(node.constant)).concat(visit_all(node.requireds)) case node.rest when SplatNode result << :"*#{node.rest.expression&.name}" when ImplicitRestNode result << :* # This doesn't make any sense at all, but since we're trying to # replicate the behavior directly, we'll copy it. result.line(666) end result.concat(visit_all(node.posts)) end end
{ a: 1 }
^^^^
# File prism/translation/ruby_parser.rb, line 114 def visit_assoc_node(node) [visit(node.key), visit(node.value)] end
def foo(**); bar(**); end
^^
{ **foo }
^^^^^
# File prism/translation/ruby_parser.rb, line 123 def visit_assoc_splat_node(node) if node.value.nil? [s(node, :kwsplat)] else [s(node, :kwsplat, visit(node.value))] end end
$+ ^^
# File prism/translation/ruby_parser.rb, line 133 def visit_back_reference_read_node(node) s(node, :back_ref, node.name.name.delete_prefix("$").to_sym) end
begin end ^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 139 def visit_begin_node(node) result = node.statements.nil? ? s(node, :nil) : visit(node.statements) if !node.rescue_clause.nil? if !node.statements.nil? result = s(node.statements, :rescue, result, visit(node.rescue_clause)) else result = s(node.rescue_clause, :rescue, visit(node.rescue_clause)) end current = node.rescue_clause until (current = current.subsequent).nil? result << visit(current) end end if !node.else_clause&.statements.nil? result << visit(node.else_clause) end if !node.ensure_clause.nil? if !node.statements.nil? || !node.rescue_clause.nil? || !node.else_clause.nil? result = s(node.statements || node.rescue_clause || node.else_clause || node.ensure_clause, :ensure, result, visit(node.ensure_clause)) else result = s(node.ensure_clause, :ensure, visit(node.ensure_clause)) end end result end
foo(&bar)
^^^^
# File prism/translation/ruby_parser.rb, line 172 def visit_block_argument_node(node) s(node, :block_pass).tap do |result| result << visit(node.expression) unless node.expression.nil? end end
foo { |; bar| }
^^^
# File prism/translation/ruby_parser.rb, line 180 def visit_block_local_variable_node(node) node.name end
关键字或方法调用上的块。
# File prism/translation/ruby_parser.rb, line 185 def visit_block_node(node) s(node, :block_pass, visit(node.expression)) end
def foo(&bar); end
^^^^
# File prism/translation/ruby_parser.rb, line 191 def visit_block_parameter_node(node) :"&#{node.name}" end
一个块的参数。
# File prism/translation/ruby_parser.rb, line 196 def visit_block_parameters_node(node) # If this block parameters has no parameters and is using pipes, then # it inherits its location from its shadow locals, even if they're not # on the same lines as the pipes. shadow_loc = true result = if node.parameters.nil? s(node, :args) else shadow_loc = false visit(node.parameters) end if node.opening == "(" result.line = node.opening_loc.start_line result.line_max = node.closing_loc.end_line shadow_loc = false end if node.locals.any? shadow = s(node, :shadow).concat(visit_all(node.locals)) shadow.line = node.locals.first.location.start_line shadow.line_max = node.locals.last.location.end_line result << shadow if shadow_loc result.line = shadow.line result.line_max = shadow.line_max end end result end
break ^^^^^
break foo ^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 236 def visit_break_node(node) if node.arguments.nil? s(node, :break) elsif node.arguments.arguments.length == 1 s(node, :break, visit(node.arguments.arguments.first)) else s(node, :break, s(node.arguments, :array).concat(visit_all(node.arguments.arguments))) end end
foo.bar &&= baz ^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 304 def visit_call_and_write_node(node) if op_asgn?(node) s(node, op_asgn_type(node, :op_asgn), visit(node.receiver), visit_write_value(node.value), node.read_name, :"&&") else s(node, op_asgn_type(node, :op_asgn2), visit(node.receiver), node.write_name, :"&&", visit_write_value(node.value)) end end
foo ^^^
foo.bar ^^^^^^^
foo.bar() {} ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 254 def visit_call_node(node) case node.name when :!~ return s(node, :not, visit(node.copy(name: :"=~"))) when :=~ if node.arguments&.arguments&.length == 1 && node.block.nil? case node.receiver when StringNode return s(node, :match3, visit(node.arguments.arguments.first), visit(node.receiver)) when RegularExpressionNode, InterpolatedRegularExpressionNode return s(node, :match2, visit(node.receiver), visit(node.arguments.arguments.first)) end case node.arguments.arguments.first when RegularExpressionNode, InterpolatedRegularExpressionNode return s(node, :match3, visit(node.arguments.arguments.first), visit(node.receiver)) end end end type = node.attribute_write? ? :attrasgn : :call type = :"safe_#{type}" if node.safe_navigation? arguments = node.arguments&.arguments || [] write_value = arguments.pop if type == :attrasgn block = node.block if block.is_a?(BlockArgumentNode) arguments << block block = nil end result = s(node, type, visit(node.receiver), node.name).concat(visit_all(arguments)) result << visit_write_value(write_value) unless write_value.nil? visit_block(node, result, block) end
foo.bar += baz ^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 294 def visit_call_operator_write_node(node) if op_asgn?(node) s(node, op_asgn_type(node, :op_asgn), visit(node.receiver), visit_write_value(node.value), node.read_name, node.binary_operator) else s(node, op_asgn_type(node, :op_asgn2), visit(node.receiver), node.write_name, node.binary_operator, visit_write_value(node.value)) end end
foo.bar ||= baz ^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 314 def visit_call_or_write_node(node) if op_asgn?(node) s(node, op_asgn_type(node, :op_asgn), visit(node.receiver), visit_write_value(node.value), node.read_name, :"||") else s(node, op_asgn_type(node, :op_asgn2), visit(node.receiver), node.write_name, :"||", visit_write_value(node.value)) end end
foo.bar, = 1 ^^^^^^^
# File prism/translation/ruby_parser.rb, line 337 def visit_call_target_node(node) s(node, :attrasgn, visit(node.receiver), node.name) end
foo => bar => baz
^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 343 def visit_capture_pattern_node(node) visit(node.target) << visit(node.value) end
case foo; in bar; end ^^^^^^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 355 def visit_case_match_node(node) s(node, :case, visit(node.predicate)).concat(visit_all(node.conditions)) << visit(node.else_clause) end
case foo; when bar; end ^^^^^^^^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 349 def visit_case_node(node) s(node, :case, visit(node.predicate)).concat(visit_all(node.conditions)) << visit(node.else_clause) end
class Foo; end ^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 361 def visit_class_node(node) name = if node.constant_path.is_a?(ConstantReadNode) node.name else visit(node.constant_path) end if node.body.nil? s(node, :class, name, visit(node.superclass)) elsif node.body.is_a?(StatementsNode) compiler = copy_compiler(in_def: false) s(node, :class, name, visit(node.superclass)).concat(node.body.body.map { |child| child.accept(compiler) }) else s(node, :class, name, visit(node.superclass), node.body.accept(copy_compiler(in_def: false))) end end
@@foo &&= bar ^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 402 def visit_class_variable_and_write_node(node) s(node, :op_asgn_and, s(node, :cvar, node.name), s(node, class_variable_write_type, node.name, visit_write_value(node.value))) end
@@foo += bar ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 396 def visit_class_variable_operator_write_node(node) s(node, class_variable_write_type, node.name, s(node, :call, s(node, :cvar, node.name), node.binary_operator, visit_write_value(node.value))) end
@@foo ||= bar ^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 408 def visit_class_variable_or_write_node(node) s(node, :op_asgn_or, s(node, :cvar, node.name), s(node, class_variable_write_type, node.name, visit_write_value(node.value))) end
@@foo ^^^^^
# File prism/translation/ruby_parser.rb, line 381 def visit_class_variable_read_node(node) s(node, :cvar, node.name) end
@@foo, = bar ^^^^^
# File prism/translation/ruby_parser.rb, line 414 def visit_class_variable_target_node(node) s(node, class_variable_write_type, node.name) end
@@foo = 1 ^^^^^^^^^
@@foo, @@bar = 1 ^^^^^ ^^^^^
# File prism/translation/ruby_parser.rb, line 390 def visit_class_variable_write_node(node) s(node, class_variable_write_type, node.name, visit_write_value(node.value)) end
Foo &&= bar ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 447 def visit_constant_and_write_node(node) s(node, :op_asgn_and, s(node, :const, node.name), s(node, :cdecl, node.name, visit(node.value))) end
Foo += bar ^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 441 def visit_constant_operator_write_node(node) s(node, :cdecl, node.name, s(node, :call, s(node, :const, node.name), node.binary_operator, visit_write_value(node.value))) end
Foo ||= bar ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 453 def visit_constant_or_write_node(node) s(node, :op_asgn_or, s(node, :const, node.name), s(node, :cdecl, node.name, visit(node.value))) end
Foo::Bar &&= baz ^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 490 def visit_constant_path_and_write_node(node) s(node, :op_asgn_and, visit(node.target), visit_write_value(node.value)) end
Foo::Bar ^^^^^^^^
# File prism/translation/ruby_parser.rb, line 465 def visit_constant_path_node(node) if node.parent.nil? s(node, :colon3, node.name) else s(node, :colon2, visit(node.parent), node.name) end end
Foo::Bar += baz ^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 484 def visit_constant_path_operator_write_node(node) s(node, :op_asgn, visit(node.target), node.binary_operator, visit_write_value(node.value)) end
Foo::Bar ||= baz ^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 496 def visit_constant_path_or_write_node(node) s(node, :op_asgn_or, visit(node.target), visit_write_value(node.value)) end
Foo::Bar, = baz ^^^^^^^^
# File prism/translation/ruby_parser.rb, line 502 def visit_constant_path_target_node(node) inner = if node.parent.nil? s(node, :colon3, node.name) else s(node, :colon2, visit(node.parent), node.name) end s(node, :const, inner) end
Foo::Bar = 1 ^^^^^^^^^^^^
Foo::Foo, Bar::Bar = 1 ^^^^^^^^ ^^^^^^^^
# File prism/translation/ruby_parser.rb, line 478 def visit_constant_path_write_node(node) s(node, :cdecl, visit(node.target), visit_write_value(node.value)) end
Foo ^^^
# File prism/translation/ruby_parser.rb, line 426 def visit_constant_read_node(node) s(node, :const, node.name) end
Foo, = bar ^^^
# File prism/translation/ruby_parser.rb, line 459 def visit_constant_target_node(node) s(node, :cdecl, node.name) end
Foo = 1 ^^^^^^^
Foo, Bar = 1 ^^^ ^^^
# File prism/translation/ruby_parser.rb, line 435 def visit_constant_write_node(node) s(node, :cdecl, node.name, visit_write_value(node.value)) end
def foo; end ^^^^^^^^^^^^
def self.foo; end ^^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 518 def visit_def_node(node) name = node.name_loc.slice.to_sym result = if node.receiver.nil? s(node, :defn, name) else s(node, :defs, visit(node.receiver), name) end result.line(node.name_loc.start_line) if node.parameters.nil? result << s(node, :args).line(node.name_loc.start_line) else result << visit(node.parameters) end if node.body.nil? result << s(node, :nil) elsif node.body.is_a?(StatementsNode) compiler = copy_compiler(in_def: true) result.concat(node.body.body.map { |child| child.accept(compiler) }) else result << node.body.accept(copy_compiler(in_def: true)) end end
defined? a ^^^^^^^^^^
defined?(a) ^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 549 def visit_defined_node(node) s(node, :defined, visit(node.value)) end
if foo then bar else baz end
^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 555 def visit_else_node(node) visit(node.statements) end
“foo #{bar}”
^^^^^^
# File prism/translation/ruby_parser.rb, line 561 def visit_embedded_statements_node(node) result = s(node, :evstr) result << visit(node.statements) unless node.statements.nil? result end
“foo #@bar”
^^^^^
# File prism/translation/ruby_parser.rb, line 569 def visit_embedded_variable_node(node) s(node, :evstr, visit(node.variable)) end
begin; foo; ensure; bar; end
^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 575 def visit_ensure_node(node) node.statements.nil? ? s(node, :nil) : visit(node.statements) end
false ^^^^^
# File prism/translation/ruby_parser.rb, line 581 def visit_false_node(node) s(node, :false) end
foo => [*, bar, *]
^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 587 def visit_find_pattern_node(node) s(node, :find_pat, visit_pattern_constant(node.constant), :"*#{node.left.expression&.name}", *visit_all(node.requireds), :"*#{node.right.expression&.name}") end
if foo .. bar; end
^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 593 def visit_flip_flop_node(node) if node.left.is_a?(IntegerNode) && node.right.is_a?(IntegerNode) s(node, :lit, Range.new(node.left.value, node.right.value, node.exclude_end?)) else s(node, node.exclude_end? ? :flip3 : :flip2, visit(node.left), visit(node.right)) end end
1.0 ^^^
# File prism/translation/ruby_parser.rb, line 603 def visit_float_node(node) s(node, :lit, node.value) end
for foo in bar do end ^^^^^^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 609 def visit_for_node(node) s(node, :for, visit(node.collection), visit(node.index), visit(node.statements)) end
def foo(…); bar(…); end
^^^
# File prism/translation/ruby_parser.rb, line 615 def visit_forwarding_arguments_node(node) s(node, :forward_args) end
def foo(…); end
^^^
# File prism/translation/ruby_parser.rb, line 621 def visit_forwarding_parameter_node(node) s(node, :forward_args) end
super ^^^^^
super {} ^^^^^^^^
# File prism/translation/ruby_parser.rb, line 630 def visit_forwarding_super_node(node) visit_block(node, s(node, :zsuper), node.block) end
$foo &&= bar ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 657 def visit_global_variable_and_write_node(node) s(node, :op_asgn_and, s(node, :gvar, node.name), s(node, :gasgn, node.name, visit_write_value(node.value))) end
$foo += bar ^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 651 def visit_global_variable_operator_write_node(node) s(node, :gasgn, node.name, s(node, :call, s(node, :gvar, node.name), node.binary_operator, visit(node.value))) end
$foo ||= bar ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 663 def visit_global_variable_or_write_node(node) s(node, :op_asgn_or, s(node, :gvar, node.name), s(node, :gasgn, node.name, visit_write_value(node.value))) end
$foo ^^^^
# File prism/translation/ruby_parser.rb, line 636 def visit_global_variable_read_node(node) s(node, :gvar, node.name) end
$foo, = bar ^^^^
# File prism/translation/ruby_parser.rb, line 669 def visit_global_variable_target_node(node) s(node, :gasgn, node.name) end
$foo = 1 ^^^^^^^^
$foo, $bar = 1 ^^^^ ^^^^
# File prism/translation/ruby_parser.rb, line 645 def visit_global_variable_write_node(node) s(node, :gasgn, node.name, visit_write_value(node.value)) end
{} ^^
# File prism/translation/ruby_parser.rb, line 675 def visit_hash_node(node) s(node, :hash).concat(node.elements.flat_map { |element| visit(element) }) end
foo => {}
^^
# File prism/translation/ruby_parser.rb, line 681 def visit_hash_pattern_node(node) result = s(node, :hash_pat, visit_pattern_constant(node.constant)).concat(node.elements.flat_map { |element| visit(element) }) case node.rest when AssocSplatNode result << s(node.rest, :kwrest, :"**#{node.rest.value&.name}") when NoKeywordsParameterNode result << visit(node.rest) end result end
if foo then bar end ^^^^^^^^^^^^^^^^^^^
bar if foo ^^^^^^^^^^
foo ? bar : baz ^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 702 def visit_if_node(node) s(node, :if, visit(node.predicate), visit(node.statements), visit(node.subsequent)) end
1i
# File prism/translation/ruby_parser.rb, line 707 def visit_imaginary_node(node) s(node, :lit, node.value) end
{ foo: }
^^^^
# File prism/translation/ruby_parser.rb, line 713 def visit_implicit_node(node) end
foo { |bar,| }
^
# File prism/translation/ruby_parser.rb, line 718 def visit_implicit_rest_node(node) end
case foo; in bar; end ^^^^^^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 723 def visit_in_node(node) pattern = if node.pattern.is_a?(ConstantPathNode) s(node.pattern, :const, visit(node.pattern)) else node.pattern.accept(copy_compiler(in_pattern: true)) end s(node, :in, pattern).concat(node.statements.nil? ? [nil] : visit_all(node.statements.body)) end
foo &&= baz ^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 749 def visit_index_and_write_node(node) arglist = nil if !node.arguments.nil? || !node.block.nil? arglist = s(node, :arglist).concat(visit_all(node.arguments&.arguments || [])) arglist << visit(node.block) if !node.block.nil? end s(node, :op_asgn1, visit(node.receiver), arglist, :"&&", visit_write_value(node.value)) end
foo += baz ^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 736 def visit_index_operator_write_node(node) arglist = nil if !node.arguments.nil? || !node.block.nil? arglist = s(node, :arglist).concat(visit_all(node.arguments&.arguments || [])) arglist << visit(node.block) if !node.block.nil? end s(node, :op_asgn1, visit(node.receiver), arglist, node.binary_operator, visit_write_value(node.value)) end
foo ||= baz ^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 762 def visit_index_or_write_node(node) arglist = nil if !node.arguments.nil? || !node.block.nil? arglist = s(node, :arglist).concat(visit_all(node.arguments&.arguments || [])) arglist << visit(node.block) if !node.block.nil? end s(node, :op_asgn1, visit(node.receiver), arglist, :"||", visit_write_value(node.value)) end
foo, = 1 ^^^^^^^^
# File prism/translation/ruby_parser.rb, line 775 def visit_index_target_node(node) arguments = visit_all(node.arguments&.arguments || []) arguments << visit(node.block) unless node.block.nil? s(node, :attrasgn, visit(node.receiver), :[]=).concat(arguments) end
@foo &&= bar ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 805 def visit_instance_variable_and_write_node(node) s(node, :op_asgn_and, s(node, :ivar, node.name), s(node, :iasgn, node.name, visit(node.value))) end
@foo += bar ^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 799 def visit_instance_variable_operator_write_node(node) s(node, :iasgn, node.name, s(node, :call, s(node, :ivar, node.name), node.binary_operator, visit_write_value(node.value))) end
@foo ||= bar ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 811 def visit_instance_variable_or_write_node(node) s(node, :op_asgn_or, s(node, :ivar, node.name), s(node, :iasgn, node.name, visit(node.value))) end
@foo ^^^^
# File prism/translation/ruby_parser.rb, line 784 def visit_instance_variable_read_node(node) s(node, :ivar, node.name) end
@foo, = bar ^^^^
# File prism/translation/ruby_parser.rb, line 817 def visit_instance_variable_target_node(node) s(node, :iasgn, node.name) end
@foo = 1 ^^^^^^^^
@foo, @bar = 1 ^^^^ ^^^^
# File prism/translation/ruby_parser.rb, line 793 def visit_instance_variable_write_node(node) s(node, :iasgn, node.name, visit_write_value(node.value)) end
1 ^
# File prism/translation/ruby_parser.rb, line 823 def visit_integer_node(node) s(node, :lit, node.value) end
if /foo #{bar}/ then end
^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 829 def visit_interpolated_match_last_line_node(node) parts = visit_interpolated_parts(node.parts) regexp = if parts.length == 1 s(node, :lit, Regexp.new(parts.first, node.options)) else s(node, :dregx).concat(parts).tap do |result| options = node.options result << options if options != 0 end end s(node, :match, regexp) end
/foo #{bar}/ ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 846 def visit_interpolated_regular_expression_node(node) parts = visit_interpolated_parts(node.parts) if parts.length == 1 s(node, :lit, Regexp.new(parts.first, node.options)) else s(node, :dregx).concat(parts).tap do |result| options = node.options result << options if options != 0 end end end
“foo #{bar}” ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 861 def visit_interpolated_string_node(node) parts = visit_interpolated_parts(node.parts) parts.length == 1 ? s(node, :str, parts.first) : s(node, :dstr).concat(parts) end
:“foo #{bar}” ^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 868 def visit_interpolated_symbol_node(node) parts = visit_interpolated_parts(node.parts) parts.length == 1 ? s(node, :lit, parts.first.to_sym) : s(node, :dsym).concat(parts) end
‘foo #{bar}` ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 875 def visit_interpolated_x_string_node(node) source = node.heredoc? ? node.parts.first : node parts = visit_interpolated_parts(node.parts) parts.length == 1 ? s(source, :xstr, parts.first) : s(source, :dxstr).concat(parts) end
-> { it }
^^
# File prism/translation/ruby_parser.rb, line 956 def visit_it_local_variable_read_node(node) s(node, :call, nil, :it) end
foo(bar: baz)
^^^^^^^^
# File prism/translation/ruby_parser.rb, line 962 def visit_keyword_hash_node(node) s(node, :hash).concat(node.elements.flat_map { |element| visit(element) }) end
def foo(**bar); end
^^^^^
def foo(**); end
^^
# File prism/translation/ruby_parser.rb, line 971 def visit_keyword_rest_parameter_node(node) :"**#{node.name}" end
-> {}
# File prism/translation/ruby_parser.rb, line 976 def visit_lambda_node(node) parameters = case node.parameters when nil, NumberedParametersNode s(node, :args) else visit(node.parameters) end if node.body.nil? s(node, :iter, s(node, :lambda), parameters) else s(node, :iter, s(node, :lambda), parameters, visit(node.body)) end end
foo &&= bar ^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1019 def visit_local_variable_and_write_node(node) s(node, :op_asgn_and, s(node, :lvar, node.name), s(node, :lasgn, node.name, visit_write_value(node.value))) end
foo += bar ^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1013 def visit_local_variable_operator_write_node(node) s(node, :lasgn, node.name, s(node, :call, s(node, :lvar, node.name), node.binary_operator, visit_write_value(node.value))) end
foo ||= bar ^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1025 def visit_local_variable_or_write_node(node) s(node, :op_asgn_or, s(node, :lvar, node.name), s(node, :lasgn, node.name, visit_write_value(node.value))) end
foo ^^^
# File prism/translation/ruby_parser.rb, line 994 def visit_local_variable_read_node(node) if node.name.match?(/^_\d$/) s(node, :call, nil, node.name) else s(node, :lvar, node.name) end end
foo, = bar ^^^
# File prism/translation/ruby_parser.rb, line 1031 def visit_local_variable_target_node(node) s(node, :lasgn, node.name) end
foo = 1 ^^^^^^^
foo, bar = 1 ^^^ ^^^
# File prism/translation/ruby_parser.rb, line 1007 def visit_local_variable_write_node(node) s(node, :lasgn, node.name, visit_write_value(node.value)) end
if /foo/ then end
^^^^^
# File prism/translation/ruby_parser.rb, line 1037 def visit_match_last_line_node(node) s(node, :match, s(node, :lit, Regexp.new(node.unescaped, node.options))) end
foo in bar ^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1043 def visit_match_predicate_node(node) s(node, :case, visit(node.value), s(node, :in, node.pattern.accept(copy_compiler(in_pattern: true)), nil), nil) end
foo => bar ^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1049 def visit_match_required_node(node) s(node, :case, visit(node.value), s(node, :in, node.pattern.accept(copy_compiler(in_pattern: true)), nil), nil) end
/(?<foo>foo)/ =~ bar ^^^^^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1055 def visit_match_write_node(node) s(node, :match2, visit(node.call.receiver), visit(node.call.arguments.arguments.first)) end
语法树中缺失的节点。 这仅在出现语法错误的情况下使用。 parser gem 没有这样的概念,所以我们在这里发明我们自己的概念。
# File prism/translation/ruby_parser.rb, line 1062 def visit_missing_node(node) raise "Cannot visit missing node directly" end
module Foo; end ^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1068 def visit_module_node(node) name = if node.constant_path.is_a?(ConstantReadNode) node.name else visit(node.constant_path) end if node.body.nil? s(node, :module, name) elsif node.body.is_a?(StatementsNode) compiler = copy_compiler(in_def: false) s(node, :module, name).concat(node.body.body.map { |child| child.accept(compiler) }) else s(node, :module, name, node.body.accept(copy_compiler(in_def: false))) end end
foo, bar = baz ^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1088 def visit_multi_target_node(node) targets = [*node.lefts] targets << node.rest if !node.rest.nil? && !node.rest.is_a?(ImplicitRestNode) targets.concat(node.rights) s(node, :masgn, s(node, :array).concat(visit_all(targets))) end
foo, bar = baz ^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1098 def visit_multi_write_node(node) targets = [*node.lefts] targets << node.rest if !node.rest.nil? && !node.rest.is_a?(ImplicitRestNode) targets.concat(node.rights) value = if node.value.is_a?(ArrayNode) && node.value.opening_loc.nil? if node.value.elements.length == 1 && node.value.elements.first.is_a?(SplatNode) visit(node.value.elements.first) else visit(node.value) end else s(node.value, :to_ary, visit(node.value)) end s(node, :masgn, s(node, :array).concat(visit_all(targets)), value) end
next ^^^^
next foo ^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1122 def visit_next_node(node) if node.arguments.nil? s(node, :next) elsif node.arguments.arguments.length == 1 argument = node.arguments.arguments.first s(node, :next, argument.is_a?(SplatNode) ? s(node, :svalue, visit(argument)) : visit(argument)) else s(node, :next, s(node, :array).concat(visit_all(node.arguments.arguments))) end end
nil ^^^
# File prism/translation/ruby_parser.rb, line 1135 def visit_nil_node(node) s(node, :nil) end
def foo(**nil); end
^^^^^
# File prism/translation/ruby_parser.rb, line 1141 def visit_no_keywords_parameter_node(node) in_pattern ? s(node, :kwrest, :"**nil") : :"**nil" end
-> { _1 + _2 } ^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1147 def visit_numbered_parameters_node(node) raise "Cannot visit numbered parameters directly" end
$1 ^^
# File prism/translation/ruby_parser.rb, line 1153 def visit_numbered_reference_read_node(node) s(node, :nth_ref, node.number) end
def foo(bar: baz); end
^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1159 def visit_optional_keyword_parameter_node(node) s(node, :kwarg, node.name, visit(node.value)) end
def foo(bar = 1); end
^^^^^^^
# File prism/translation/ruby_parser.rb, line 1165 def visit_optional_parameter_node(node) s(node, :lasgn, node.name, visit(node.value)) end
a or b ^^^^^^
# File prism/translation/ruby_parser.rb, line 1171 def visit_or_node(node) left = visit(node.left) if left[0] == :or # ruby_parser has the or keyword as right-associative as opposed to # prism which has it as left-associative. We reverse that # associativity here. nest = left nest = nest[2] while nest[2][0] == :or nest[2] = s(node, :or, nest[2], visit(node.right)) left else s(node, :or, left, visit(node.right)) end end
def foo(bar, *baz); end
^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1189 def visit_parameters_node(node) children = node.compact_child_nodes.map do |element| if element.is_a?(MultiTargetNode) visit_destructured_parameter(element) else visit(element) end end s(node, :args).concat(children) end
() ^^
(1) ^^^
# File prism/translation/ruby_parser.rb, line 1227 def visit_parentheses_node(node) if node.body.nil? s(node, :nil) else visit(node.body) end end
foo => ^(bar)
^^^^^^
# File prism/translation/ruby_parser.rb, line 1237 def visit_pinned_expression_node(node) node.expression.accept(copy_compiler(in_pattern: false)) end
foo = 1 和 bar => ^foo
^^^^
# File prism/translation/ruby_parser.rb, line 1243 def visit_pinned_variable_node(node) if node.variable.is_a?(LocalVariableReadNode) && node.variable.name.match?(/^_\d$/) s(node, :lvar, node.variable.name) else visit(node.variable) end end
END {}
# File prism/translation/ruby_parser.rb, line 1252 def visit_post_execution_node(node) s(node, :iter, s(node, :postexe), 0, visit(node.statements)) end
BEGIN {}
# File prism/translation/ruby_parser.rb, line 1257 def visit_pre_execution_node(node) s(node, :iter, s(node, :preexe), 0, visit(node.statements)) end
顶层程序节点。
# File prism/translation/ruby_parser.rb, line 1262 def visit_program_node(node) visit(node.statements) end
0..5 ^^^^
# File prism/translation/ruby_parser.rb, line 1268 def visit_range_node(node) if !in_pattern && !node.left.nil? && !node.right.nil? && ([node.left.type, node.right.type] - %i[nil_node integer_node]).empty? left = node.left.value if node.left.is_a?(IntegerNode) right = node.right.value if node.right.is_a?(IntegerNode) s(node, :lit, Range.new(left, right, node.exclude_end?)) else s(node, node.exclude_end? ? :dot3 : :dot2, visit_range_bounds_node(node.left), visit_range_bounds_node(node.right)) end end
1r ^^
# File prism/translation/ruby_parser.rb, line 1290 def visit_rational_node(node) s(node, :lit, node.value) end
redo ^^^^
# File prism/translation/ruby_parser.rb, line 1296 def visit_redo_node(node) s(node, :redo) end
/foo/ ^^^^^
# File prism/translation/ruby_parser.rb, line 1302 def visit_regular_expression_node(node) s(node, :lit, Regexp.new(node.unescaped, node.options)) end
def foo(bar:); end
^^^^
# File prism/translation/ruby_parser.rb, line 1308 def visit_required_keyword_parameter_node(node) s(node, :kwarg, node.name) end
def foo(bar); end
^^^
# File prism/translation/ruby_parser.rb, line 1314 def visit_required_parameter_node(node) node.name end
foo rescue bar ^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1320 def visit_rescue_modifier_node(node) s(node, :rescue, visit(node.expression), s(node.rescue_expression, :resbody, s(node.rescue_expression, :array), visit(node.rescue_expression))) end
begin; rescue; end
^^^^^^^
# File prism/translation/ruby_parser.rb, line 1326 def visit_rescue_node(node) exceptions = if node.exceptions.length == 1 && node.exceptions.first.is_a?(SplatNode) visit(node.exceptions.first) else s(node, :array).concat(visit_all(node.exceptions)) end if !node.reference.nil? exceptions << (visit(node.reference) << s(node.reference, :gvar, :"$!")) end s(node, :resbody, exceptions).concat(node.statements.nil? ? [nil] : visit_all(node.statements.body)) end
def foo(*bar); end
^^^^
def foo(*); end
^
# File prism/translation/ruby_parser.rb, line 1346 def visit_rest_parameter_node(node) :"*#{node.name}" end
retry ^^^^^
# File prism/translation/ruby_parser.rb, line 1352 def visit_retry_node(node) s(node, :retry) end
return ^^^^^^
return 1 ^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1361 def visit_return_node(node) if node.arguments.nil? s(node, :return) elsif node.arguments.arguments.length == 1 argument = node.arguments.arguments.first s(node, :return, argument.is_a?(SplatNode) ? s(node, :svalue, visit(argument)) : visit(argument)) else s(node, :return, s(node, :array).concat(visit_all(node.arguments.arguments))) end end
self ^^^^
# File prism/translation/ruby_parser.rb, line 1374 def visit_self_node(node) s(node, :self) end
class << self; end ^^^^^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1385 def visit_singleton_class_node(node) s(node, :sclass, visit(node.expression)).tap do |sexp| sexp << node.body.accept(copy_compiler(in_def: false)) unless node.body.nil? end end
__ENCODING__ ^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1393 def visit_source_encoding_node(node) # TODO s(node, :colon2, s(node, :const, :Encoding), :UTF_8) end
__FILE__ ^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1400 def visit_source_file_node(node) s(node, :str, node.filepath) end
__LINE__ ^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1406 def visit_source_line_node(node) s(node, :lit, node.location.start_line) end
foo(*bar)
^^^^
def foo((bar, *baz)); end
^^^^
def foo(*); bar(*); end
^
# File prism/translation/ruby_parser.rb, line 1418 def visit_splat_node(node) if node.expression.nil? s(node, :splat) else s(node, :splat, visit(node.expression)) end end
语句列表。
# File prism/translation/ruby_parser.rb, line 1427 def visit_statements_node(node) first, *rest = node.body if rest.empty? visit(first) else s(node, :block).concat(visit_all(node.body)) end end
“foo” ^^^^^
# File prism/translation/ruby_parser.rb, line 1439 def visit_string_node(node) unescaped = node.unescaped if node.forced_binary_encoding? unescaped.force_encoding(Encoding::BINARY) end s(node, :str, unescaped) end
super(foo) ^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1451 def visit_super_node(node) arguments = node.arguments&.arguments || [] block = node.block if block.is_a?(BlockArgumentNode) arguments << block block = nil end visit_block(node, s(node, :super).concat(visit_all(arguments)), block) end
:foo ^^^^
# File prism/translation/ruby_parser.rb, line 1465 def visit_symbol_node(node) node.value == "!@" ? s(node, :lit, :"!@") : s(node, :lit, node.unescaped.to_sym) end
true ^^^^
# File prism/translation/ruby_parser.rb, line 1471 def visit_true_node(node) s(node, :true) end
undef foo ^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1477 def visit_undef_node(node) names = node.names.map { |name| s(node, :undef, visit(name)) } names.length == 1 ? names.first : s(node, :block).concat(names) end
unless foo; bar end ^^^^^^^^^^^^^^^^^^^
bar unless foo ^^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1487 def visit_unless_node(node) s(node, :if, visit(node.predicate), visit(node.else_clause), visit(node.statements)) end
until foo; bar end ^^^^^^^^^^^^^^^^^
bar until foo ^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1496 def visit_until_node(node) s(node, :until, visit(node.predicate), visit(node.statements), !node.begin_modifier?) end
case foo; when bar; end
^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1502 def visit_when_node(node) s(node, :when, s(node, :array).concat(visit_all(node.conditions))).concat(node.statements.nil? ? [nil] : visit_all(node.statements.body)) end
while foo; bar end ^^^^^^^^^^^^^^^^^^
bar while foo ^^^^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1511 def visit_while_node(node) s(node, :while, visit(node.predicate), visit(node.statements), !node.begin_modifier?) end
‘foo` ^^^^^
# File prism/translation/ruby_parser.rb, line 1517 def visit_x_string_node(node) result = s(node, :xstr, node.unescaped) if node.heredoc? result.line = node.content_loc.start_line result.line_max = node.content_loc.end_line end result end
yield ^^^^^
yield 1 ^^^^^^^
# File prism/translation/ruby_parser.rb, line 1533 def visit_yield_node(node) s(node, :yield).concat(visit_all(node.arguments&.arguments || [])) end
私有实例方法
如果在方法定义中写入类变量,它的类型与其他地方不同。
# File prism/translation/ruby_parser.rb, line 420 def class_variable_write_type in_def ? :cvasgn : :cvdecl end
使用给定选项创建一个新的编译器。
# File prism/translation/ruby_parser.rb, line 1540 def copy_compiler(in_def: self.in_def, in_pattern: self.in_pattern) Compiler.new(file, in_def: in_def, in_pattern: in_pattern) end
后面带有运算符的调用节点将是 op_asgn 或 op_asgn2 节点。这取决于它们的调用运算符和它们的右侧。
# File prism/translation/ruby_parser.rb, line 325 def op_asgn?(node) node.call_operator == "::" || (node.value.is_a?(CallNode) && node.value.opening_loc.nil? && !node.value.arguments.nil?) end
后面带有运算符的调用节点可以使用 &. 作为运算符,这会通过添加 “safe_” 前缀来更改它们的类型。
# File prism/translation/ruby_parser.rb, line 331 def op_asgn_type(node, type) node.safe_navigation? ? :"safe_#{type}" : type end
从给定的棱镜节点和参数创建一个新的 Sexp 对象。
# File prism/translation/ruby_parser.rb, line 1545 def s(node, *arguments) result = Sexp.new(*arguments) result.file = file result.line = node.location.start_line result.line_max = node.location.end_line result end
访问一个块节点,它将通过将给定的访问节点包装在 iter 节点中来修改 AST。
# File prism/translation/ruby_parser.rb, line 1555 def visit_block(node, sexp, block) if block.nil? sexp else parameters = case block.parameters when nil, NumberedParametersNode 0 else visit(block.parameters) end if block.body.nil? s(node, :iter, sexp, parameters) else s(node, :iter, sexp, parameters, visit(block.body)) end end end
def foo((bar, baz)); end
^^^^^^^^^^
# File prism/translation/ruby_parser.rb, line 1204 def visit_destructured_parameter(node) children = [*node.lefts, *node.rest, *node.rights].map do |child| case child when RequiredParameterNode visit(child) when MultiTargetNode visit_destructured_parameter(child) when SplatNode :"*#{child.expression&.name}" else raise end end s(node, :masgn).concat(children) end
访问类似字符串节点的插值内容。
# File prism/translation/ruby_parser.rb, line 882 def visit_interpolated_parts(parts) visited = [] parts.each do |part| result = visit(part) if result[0] == :evstr && result[1] if result[1][0] == :str visited << result[1] elsif result[1][0] == :dstr visited.concat(result[1][1..-1]) else visited << result end visited << :space elsif result[0] == :dstr if !visited.empty? && part.parts[0].is_a?(StringNode) # If we are in the middle of an implicitly concatenated string, # we should not have a bare string as the first part. In this # case we need to visit just that first part and then we can # push the rest of the parts onto the visited array. result[1] = visit(part.parts[0]) end visited.concat(result[1..-1]) else visited << result end end state = :beginning #: :beginning | :string_content | :interpolated_content results = [] visited.each_with_index do |result, index| case state when :beginning if result.is_a?(String) results << result state = :string_content elsif result.is_a?(Array) && result[0] == :str results << result[1] state = :string_content else results << "" results << result state = :interpolated_content end when :string_content if result == :space # continue elsif result.is_a?(String) results[0] << result elsif result.is_a?(Array) && result[0] == :str results[0] << result[1] else results << result state = :interpolated_content end when :interpolated_content if result == :space # continue elsif visited[index - 1] != :space && result.is_a?(Array) && result[0] == :str && results[-1][0] == :str && (results[-1].line_max == result.line) results[-1][1] << result[1] results[-1].line_max = result.line_max else results << result end end end results end
Pattern
常量被包装在另一层的 :const 中。
# File prism/translation/ruby_parser.rb, line 1576 def visit_pattern_constant(node) case node when nil # nothing when ConstantReadNode visit(node) else s(node, :const, visit(node)) end end
如果范围节点的边界为空括号,则它们不会被它们通常的 s(:nil) 替换,而是被 s(:begin) 替换。
# File prism/translation/ruby_parser.rb, line 1280 def visit_range_bounds_node(node) if node.is_a?(ParenthesesNode) && node.body.nil? s(node, :begin) else visit(node) end end
访问写入的值,该值将位于写入运算符的右侧。由于隐式数组可能具有 splat,因此它们可能会被包装在 svalue 节点中。
# File prism/translation/ruby_parser.rb, line 1590 def visit_write_value(node) if node.is_a?(ArrayNode) && node.opening_loc.nil? if node.elements.length == 1 && node.elements.first.is_a?(SplatNode) s(node, :svalue, visit(node.elements.first)) else s(node, :svalue, visit(node)) end else visit(node) end end