class Prism::Compiler
编译器是一个访问器，它在访问每个节点时返回该节点的值。 这与只遍历树的访问器相反。 当您尝试将树编译为不同的格式时，这会很有用。
例如，要构建树的 S-表达式表示，您可以编写
class SExpressions < Prism::Compiler def visit_arguments_node(node) = [:arguments, super] def visit_call_node(node) = [:call, super] def visit_integer_node(node) = [:integer] def visit_program_node(node) = [:program, super] end Prism.parse("1 + 2").value.accept(SExpressions.new) # => [:program, [[[:call, [[:integer], [:arguments, [[:integer]]]]]]]]
公共实例方法
visit(node) 点击切换源代码
访问单个节点。
# File prism/compiler.rb, line 29 def visit(node) node&.accept(self) end
visit_all(nodes) 点击切换源代码
访问节点列表。
# File prism/compiler.rb, line 34 def visit_all(nodes) nodes.map { |node| node&.accept(self) } end
visit_child_nodes(node) 点击切换源代码
访问给定节点的子节点。
# File prism/compiler.rb, line 39 def visit_child_nodes(node) node.compact_child_nodes.map { |node| node.accept(self) } end
也称为别名：visit_alias_global_variable_node, visit_alias_method_node, visit_alternation_pattern_node, visit_and_node, visit_arguments_node, visit_array_node, visit_array_pattern_node, visit_assoc_node, visit_assoc_splat_node, visit_back_reference_read_node, visit_begin_node, visit_block_argument_node, visit_block_local_variable_node, visit_block_node, visit_block_parameter_node, visit_block_parameters_node, visit_break_node, visit_call_and_write_node, visit_call_node, visit_call_operator_write_node, visit_call_or_write_node, visit_call_target_node, visit_capture_pattern_node, visit_case_match_node, visit_case_node, visit_class_node, visit_class_variable_and_write_node, visit_class_variable_operator_write_node, visit_class_variable_or_write_node, visit_class_variable_read_node, visit_class_variable_target_node, visit_class_variable_write_node, visit_constant_and_write_node, visit_constant_operator_write_node, visit_constant_or_write_node, visit_constant_path_and_write_node, visit_constant_path_node, visit_constant_path_operator_write_node, visit_constant_path_or_write_node, visit_constant_path_target_node, visit_constant_path_write_node, visit_constant_read_node, visit_constant_target_node, visit_constant_write_node, visit_def_node, visit_defined_node, visit_else_node, visit_embedded_statements_node, visit_embedded_variable_node, visit_ensure_node, visit_false_node, visit_find_pattern_node, visit_flip_flop_node, visit_float_node, visit_for_node, visit_forwarding_arguments_node, visit_forwarding_parameter_node, visit_forwarding_super_node, visit_global_variable_and_write_node, visit_global_variable_operator_write_node, visit_global_variable_or_write_node, visit_global_variable_read_node, visit_global_variable_target_node, visit_global_variable_write_node, visit_hash_node, visit_hash_pattern_node, visit_if_node, visit_imaginary_node, visit_implicit_node, visit_implicit_rest_node, visit_in_node, visit_index_and_write_node, visit_index_operator_write_node, visit_index_or_write_node, visit_index_target_node, visit_instance_variable_and_write_node, visit_instance_variable_operator_write_node, visit_instance_variable_or_write_node, visit_instance_variable_read_node, visit_instance_variable_target_node, visit_instance_variable_write_node, visit_integer_node, visit_interpolated_match_last_line_node, visit_interpolated_regular_expression_node, visit_interpolated_string_node, visit_interpolated_symbol_node, visit_interpolated_x_string_node, visit_it_local_variable_read_node, visit_it_parameters_node, visit_keyword_hash_node, visit_keyword_rest_parameter_node, visit_lambda_node, visit_local_variable_and_write_node, visit_local_variable_operator_write_node, visit_local_variable_or_write_node, visit_local_variable_read_node, visit_local_variable_target_node, visit_local_variable_write_node, visit_match_last_line_node, visit_match_predicate_node, visit_match_required_node, visit_match_write_node, visit_missing_node, visit_module_node, visit_multi_target_node, visit_multi_write_node, visit_next_node, visit_nil_node, visit_no_keywords_parameter_node, visit_numbered_parameters_node, visit_numbered_reference_read_node, visit_optional_keyword_parameter_node, visit_optional_parameter_node, visit_or_node, visit_parameters_node, visit_parentheses_node, visit_pinned_expression_node, visit_pinned_variable_node, visit_post_execution_node, visit_pre_execution_node, visit_program_node, visit_range_node, visit_rational_node, visit_redo_node, visit_regular_expression_node, visit_required_keyword_parameter_node, visit_required_parameter_node, visit_rescue_modifier_node, visit_rescue_node, visit_rest_parameter_node, visit_retry_node, visit_return_node, visit_self_node, visit_shareable_constant_node, visit_singleton_class_node, visit_source_encoding_node, visit_source_file_node, visit_source_line_node, visit_splat_node, visit_statements_node, visit_string_node, visit_super_node, visit_symbol_node, visit_true_node, visit_undef_node, visit_unless_node, visit_until_node, visit_when_node, visit_while_node, visit_x_string_node, visit_yield_node
visit_class_variable_operator_write_node(node)
编译一个 ClassVariableOperatorWriteNode 节点
visit_constant_path_operator_write_node(node)
编译一个 ConstantPathOperatorWriteNode 节点
visit_global_variable_operator_write_node(node)
编译一个 GlobalVariableOperatorWriteNode 节点
visit_instance_variable_and_write_node(node)
编译一个 InstanceVariableAndWriteNode 节点
visit_instance_variable_operator_write_node(node)
visit_instance_variable_or_write_node(node)
编译一个 InstanceVariableOrWriteNode 节点
visit_interpolated_match_last_line_node(node)
编译一个 InterpolatedMatchLastLineNode 节点
visit_interpolated_regular_expression_node(node)
visit_local_variable_operator_write_node(node)
编译一个 LocalVariableOperatorWriteNode 节点
visit_optional_keyword_parameter_node(node)
编译一个 OptionalKeywordParameterNode 节点
visit_required_keyword_parameter_node(node)
编译一个 RequiredKeywordParameterNode 节点