class Prism::Translation::Parser::Compiler

A visitor that knows how to convert a prism syntax tree into the whitequark/parser gem’s syntax tree.

Constants

Range: Locations in the parser gem AST are generated using this class. We store a reference to its constant to make it slightly faster to look up.

Attributes

builder [R]

The Parser::Builders::Default instance that is being used to build the AST.

forwarding [R]

The types of values that can be forwarded in the current scope.

in_destructure [R]

Whether or not the current node is in a destructure.

in_pattern [R]

Whether or not the current node is in a pattern.

offset_cache [R]

The offset cache that is used to map between byte and character offsets in the file.

parser [R]

The Parser::Base instance that is being used to build the AST.

source_buffer [R]

The Parser::Source::Buffer instance that is holding a reference to the source code.

Public Class Methods

new (parser, offset_cache, forwarding: [], in_destructure: false, in_pattern: false)

Source

# File lib/prism/translation/parser/compiler.rb, line 40
def initialize(parser, offset_cache, forwarding: [], in_destructure: false, in_pattern: false)
  @parser = parser
  @builder = parser.builder
  @source_buffer = parser.source_buffer
  @offset_cache = offset_cache

  @forwarding = forwarding
  @in_destructure = in_destructure
  @in_pattern = in_pattern
end

Initialize a new compiler with the given parser, offset cache, and options.

Public Instance Methods

visit_alias_global_variable_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 59
def visit_alias_global_variable_node(node)
  builder.alias(token(node.keyword_loc), visit(node.new_name), visit(node.old_name))
end

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

visit_alias_method_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 53
def visit_alias_method_node(node)
  builder.alias(token(node.keyword_loc), visit(node.new_name), visit(node.old_name))
end

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

visit_alternation_pattern_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 65
def visit_alternation_pattern_node(node)
  builder.match_alt(visit(node.left), token(node.operator_loc), visit(node.right))
end

foo => bar | baz ^^^^^^^^^

visit_and_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 71
def visit_and_node(node)
  builder.logical_op(:and, visit(node.left), token(node.operator_loc), visit(node.right))
end

a and b ^^^^^^^

visit_arguments_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 128
def visit_arguments_node(node)
  visit_all(node.arguments)
end

foo(bar) ^^^

visit_array_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 77
def visit_array_node(node)
  if node.opening&.start_with?("%w", "%W", "%i", "%I")
    elements = node.elements.flat_map do |element|
      if element.is_a?(StringNode)
        if element.content.include?("\n")
          string_nodes_from_line_continuations(element.unescaped, element.content, element.content_loc.start_offset, node.opening)
        else
          [builder.string_internal([element.unescaped, srange(element.content_loc)])]
        end
      elsif element.is_a?(InterpolatedStringNode)
        builder.string_compose(
          token(element.opening_loc),
          string_nodes_from_interpolation(element, node.opening),
          token(element.closing_loc)
        )
      else
        [visit(element)]
      end
    end
  else
    elements = visit_all(node.elements)
  end

  builder.array(token(node.opening_loc), elements, token(node.closing_loc))
end

[] ^^

visit_array_pattern_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 105
def visit_array_pattern_node(node)
  elements = [*node.requireds]
  elements << node.rest if !node.rest.nil? && !node.rest.is_a?(ImplicitRestNode)
  elements.concat(node.posts)
  visited = visit_all(elements)

  if node.rest.is_a?(ImplicitRestNode)
    visited[-1] = builder.match_with_trailing_comma(visited[-1], token(node.rest.location))
  end

  if node.constant
    if visited.empty?
      builder.const_pattern(visit(node.constant), token(node.opening_loc), builder.array_pattern(token(node.opening_loc), visited, token(node.closing_loc)), token(node.closing_loc))
    else
      builder.const_pattern(visit(node.constant), token(node.opening_loc), builder.array_pattern(nil, visited, nil), token(node.closing_loc))
    end
  else
    builder.array_pattern(token(node.opening_loc), visited, token(node.closing_loc))
  end
end

foo => [bar] ^^^^^

visit_assoc_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 134
def visit_assoc_node(node)
  key = node.key

  if  node.value.is_a?(ImplicitNode)
    if in_pattern
      if key.is_a?(SymbolNode)
        if key.opening.nil?
          builder.match_hash_var([key.unescaped, srange(key.location)])
        else
          builder.match_hash_var_from_str(token(key.opening_loc), [builder.string_internal([key.unescaped, srange(key.value_loc)])], token(key.closing_loc))
        end
      else
        builder.match_hash_var_from_str(token(key.opening_loc), visit_all(key.parts), token(key.closing_loc))
      end
    else
      value = node.value.value

      implicit_value = if value.is_a?(CallNode)
        builder.call_method(nil, nil, [value.name, srange(value.message_loc)])
      elsif value.is_a?(ConstantReadNode)
        builder.const([value.name, srange(key.value_loc)])
      else
        builder.ident([value.name, srange(key.value_loc)]).updated(:lvar)
      end

      builder.pair_keyword([key.unescaped, srange(key)], implicit_value)
    end
  elsif node.operator_loc
    builder.pair(visit(key), token(node.operator_loc), visit(node.value))
  elsif key.is_a?(SymbolNode) && key.opening_loc.nil?
    builder.pair_keyword([key.unescaped, srange(key.location)], visit(node.value))
  else
    parts =
      if key.is_a?(SymbolNode)
        [builder.string_internal([key.unescaped, srange(key.value_loc)])]
      else
        visit_all(key.parts)
      end

    builder.pair_quoted(token(key.opening_loc), parts, token(key.closing_loc), visit(node.value))
  end
end

{ a: 1 } ^^^^

visit_assoc_splat_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 182
def visit_assoc_splat_node(node)
  if in_pattern
    builder.match_rest(token(node.operator_loc), token(node.value&.location))
  elsif node.value.nil? && forwarding.include?(:**)
    builder.forwarded_kwrestarg(token(node.operator_loc))
  else
    builder.kwsplat(token(node.operator_loc), visit(node.value))
  end
end

def foo(); bar(); end ^^

{ **foo } ^^^^^

visit_back_reference_read_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 194
def visit_back_reference_read_node(node)
  builder.back_ref(token(node.location))
end

$+ ^^

visit_begin_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 200
def visit_begin_node(node)
  rescue_bodies = []

  if (rescue_clause = node.rescue_clause)
    begin
      find_start_offset = (rescue_clause.reference&.location || rescue_clause.exceptions.last&.location || rescue_clause.keyword_loc).end_offset
      find_end_offset = (
        rescue_clause.statements&.location&.start_offset ||
        rescue_clause.subsequent&.location&.start_offset ||
        node.else_clause&.location&.start_offset ||
        node.ensure_clause&.location&.start_offset ||
        node.end_keyword_loc&.start_offset ||
        find_start_offset + 1
      )

      rescue_bodies << builder.rescue_body(
        token(rescue_clause.keyword_loc),
        rescue_clause.exceptions.any? ? builder.array(nil, visit_all(rescue_clause.exceptions), nil) : nil,
        token(rescue_clause.operator_loc),
        visit(rescue_clause.reference),
        srange_semicolon(find_start_offset, find_end_offset),
        visit(rescue_clause.statements)
      )
    end until (rescue_clause = rescue_clause.subsequent).nil?
  end

  begin_body =
    builder.begin_body(
      visit(node.statements),
      rescue_bodies,
      token(node.else_clause&.else_keyword_loc),
      visit(node.else_clause),
      token(node.ensure_clause&.ensure_keyword_loc),
      visit(node.ensure_clause&.statements)
    )

  if node.begin_keyword_loc
    builder.begin_keyword(token(node.begin_keyword_loc), begin_body, token(node.end_keyword_loc))
  else
    begin_body
  end
end

begin end ^^^^^^^^^

visit_block_argument_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 245
def visit_block_argument_node(node)
  builder.block_pass(token(node.operator_loc), visit(node.expression))
end

foo(&bar) ^^^^

visit_block_local_variable_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 251
def visit_block_local_variable_node(node)
  builder.shadowarg(token(node.location))
end

foo { |; bar| } ^^^

visit_block_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 256
def visit_block_node(node)
  raise CompilationError, "Cannot directly compile block nodes"
end

A block on a keyword or method call.

visit_block_parameter_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 262
def visit_block_parameter_node(node)
  builder.blockarg(token(node.operator_loc), token(node.name_loc))
end

def foo(&bar); end ^^^^

visit_block_parameters_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 267
def visit_block_parameters_node(node)
  [*visit(node.parameters)].concat(visit_all(node.locals))
end

A block’s parameters.

visit_break_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 276
def visit_break_node(node)
  builder.keyword_cmd(:break, token(node.keyword_loc), nil, visit(node.arguments) || [], nil)
end

break ^^^^^

break foo ^^^^^^^^^

visit_call_and_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 381
def visit_call_and_write_node(node)
  call_operator_loc = node.call_operator_loc

  builder.op_assign(
    builder.call_method(
      visit(node.receiver),
      call_operator_loc.nil? ? nil : [{ "." => :dot, "&." => :anddot, "::" => "::" }.fetch(call_operator_loc.slice), srange(call_operator_loc)],
      node.message_loc ? [node.read_name, srange(node.message_loc)] : nil,
      nil,
      [],
      nil
    ),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_call_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 288
def visit_call_node(node)
  name = node.name
  arguments = node.arguments&.arguments || []
  block = node.block

  if block.is_a?(BlockArgumentNode)
    arguments = [*arguments, block]
    block = nil
  end

  if node.call_operator_loc.nil?
    case name
    when :-@
      case (receiver = node.receiver).type
      when :integer_node, :float_node, :rational_node, :imaginary_node
        return visit(numeric_negate(node.message_loc, receiver))
      end
    when :!
      return visit_block(builder.not_op(token(node.message_loc), token(node.opening_loc), visit(node.receiver), token(node.closing_loc)), block)
    when :=~
      if (receiver = node.receiver).is_a?(RegularExpressionNode)
        return builder.match_op(visit(receiver), token(node.message_loc), visit(node.arguments.arguments.first))
      end
    when :[]
      return visit_block(builder.index(visit(node.receiver), token(node.opening_loc), visit_all(arguments), token(node.closing_loc)), block)
    when :[]=
      if node.message != "[]=" && node.arguments && block.nil? && !node.safe_navigation?
        arguments = node.arguments.arguments[...-1]
        arguments << node.block if node.block

        return visit_block(
          builder.assign(
            builder.index_asgn(
              visit(node.receiver),
              token(node.opening_loc),
              visit_all(arguments),
              token(node.closing_loc),
            ),
            token(node.equal_loc),
            visit(node.arguments.arguments.last)
          ),
          block
        )
      end
    end
  end

  message_loc = node.message_loc
  call_operator_loc = node.call_operator_loc
  call_operator = [{ "." => :dot, "&." => :anddot, "::" => "::" }.fetch(call_operator_loc.slice), srange(call_operator_loc)] if call_operator_loc

  visit_block(
    if name.end_with?("=") && !message_loc.slice.end_with?("=") && node.arguments && block.nil?
      builder.assign(
        builder.attr_asgn(visit(node.receiver), call_operator, token(message_loc)),
        token(node.equal_loc),
        visit(node.arguments.arguments.last)
      )
    else
      builder.call_method(
        visit(node.receiver),
        call_operator,
        message_loc ? [node.name, srange(message_loc)] : nil,
        token(node.opening_loc),
        visit_all(arguments),
        token(node.closing_loc)
      )
    end,
    block
  )
end

foo ^^^

foo.bar ^^^^^^^

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

visit_call_operator_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 362
def visit_call_operator_write_node(node)
  call_operator_loc = node.call_operator_loc

  builder.op_assign(
    builder.call_method(
      visit(node.receiver),
      call_operator_loc.nil? ? nil : [{ "." => :dot, "&." => :anddot, "::" => "::" }.fetch(call_operator_loc.slice), srange(call_operator_loc)],
      node.message_loc ? [node.read_name, srange(node.message_loc)] : nil,
      nil,
      [],
      nil
    ),
    [node.binary_operator_loc.slice.chomp("="), srange(node.binary_operator_loc)],
    visit(node.value)
  )
end

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

visit_call_or_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 400
def visit_call_or_write_node(node)
  call_operator_loc = node.call_operator_loc

  builder.op_assign(
    builder.call_method(
      visit(node.receiver),
      call_operator_loc.nil? ? nil : [{ "." => :dot, "&." => :anddot, "::" => "::" }.fetch(call_operator_loc.slice), srange(call_operator_loc)],
      node.message_loc ? [node.read_name, srange(node.message_loc)] : nil,
      nil,
      [],
      nil
    ),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_call_target_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 419
def visit_call_target_node(node)
  call_operator_loc = node.call_operator_loc

  builder.attr_asgn(
    visit(node.receiver),
    call_operator_loc.nil? ? nil : [{ "." => :dot, "&." => :anddot, "::" => "::" }.fetch(call_operator_loc.slice), srange(call_operator_loc)],
    token(node.message_loc)
  )
end

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

visit_capture_pattern_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 431
def visit_capture_pattern_node(node)
  builder.match_as(visit(node.value), token(node.operator_loc), visit(node.target))
end

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

visit_case_match_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 450
def visit_case_match_node(node)
  builder.case_match(
    token(node.case_keyword_loc),
    visit(node.predicate),
    visit_all(node.conditions),
    token(node.else_clause&.else_keyword_loc),
    visit(node.else_clause),
    token(node.end_keyword_loc)
  )
end

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

visit_case_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 437
def visit_case_node(node)
  builder.case(
    token(node.case_keyword_loc),
    visit(node.predicate),
    visit_all(node.conditions),
    token(node.else_clause&.else_keyword_loc),
    visit(node.else_clause),
    token(node.end_keyword_loc)
  )
end

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

visit_class_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 463
def visit_class_node(node)
  builder.def_class(
    token(node.class_keyword_loc),
    visit(node.constant_path),
    token(node.inheritance_operator_loc),
    visit(node.superclass),
    node.body&.accept(copy_compiler(forwarding: [])),
    token(node.end_keyword_loc)
  )
end

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

visit_class_variable_and_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 502
def visit_class_variable_and_write_node(node)
  builder.op_assign(
    builder.assignable(builder.cvar(token(node.name_loc))),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_class_variable_operator_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 492
def visit_class_variable_operator_write_node(node)
  builder.op_assign(
    builder.assignable(builder.cvar(token(node.name_loc))),
    [node.binary_operator_loc.slice.chomp("="), srange(node.binary_operator_loc)],
    visit(node.value)
  )
end

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

visit_class_variable_or_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 512
def visit_class_variable_or_write_node(node)
  builder.op_assign(
    builder.assignable(builder.cvar(token(node.name_loc))),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_class_variable_read_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 476
def visit_class_variable_read_node(node)
  builder.cvar(token(node.location))
end

@@foo ^^^^^

visit_class_variable_target_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 522
def visit_class_variable_target_node(node)
  builder.assignable(builder.cvar(token(node.location)))
end

@@foo, = bar ^^^^^

visit_class_variable_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 482
def visit_class_variable_write_node(node)
  builder.assign(
    builder.assignable(builder.cvar(token(node.name_loc))),
    token(node.operator_loc),
    visit(node.value)
  )
end

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

visit_constant_and_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 553
def visit_constant_and_write_node(node)
  builder.op_assign(
    builder.assignable(builder.const([node.name, srange(node.name_loc)])),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_constant_operator_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 543
def visit_constant_operator_write_node(node)
  builder.op_assign(
    builder.assignable(builder.const([node.name, srange(node.name_loc)])),
    [node.binary_operator_loc.slice.chomp("="), srange(node.binary_operator_loc)],
    visit(node.value)
  )
end

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

visit_constant_or_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 563
def visit_constant_or_write_node(node)
  builder.op_assign(
    builder.assignable(builder.const([node.name, srange(node.name_loc)])),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_constant_path_and_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 619
def visit_constant_path_and_write_node(node)
  builder.op_assign(
    builder.assignable(visit(node.target)),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_constant_path_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 579
def visit_constant_path_node(node)
  if node.parent.nil?
    builder.const_global(
      token(node.delimiter_loc),
      [node.name, srange(node.name_loc)]
    )
  else
    builder.const_fetch(
      visit(node.parent),
      token(node.delimiter_loc),
      [node.name, srange(node.name_loc)]
    )
  end
end

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

visit_constant_path_operator_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 609
def visit_constant_path_operator_write_node(node)
  builder.op_assign(
    builder.assignable(visit(node.target)),
    [node.binary_operator_loc.slice.chomp("="), srange(node.binary_operator_loc)],
    visit(node.value)
  )
end

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

visit_constant_path_or_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 629
def visit_constant_path_or_write_node(node)
  builder.op_assign(
    builder.assignable(visit(node.target)),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_constant_path_target_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 639
def visit_constant_path_target_node(node)
  builder.assignable(visit_constant_path_node(node))
end

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

visit_constant_path_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 599
def visit_constant_path_write_node(node)
  builder.assign(
    builder.assignable(visit(node.target)),
    token(node.operator_loc),
    visit(node.value)
  )
end

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

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

visit_constant_read_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 528
def visit_constant_read_node(node)
  builder.const([node.name, srange(node.location)])
end

Foo ^^^

visit_constant_target_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 573
def visit_constant_target_node(node)
  builder.assignable(builder.const([node.name, srange(node.location)]))
end

Foo, = bar ^^^

visit_constant_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 537
def visit_constant_write_node(node)
  builder.assign(builder.assignable(builder.const([node.name, srange(node.name_loc)])), token(node.operator_loc), visit(node.value))
end

Foo = 1 ^^^^^^^

Foo, Bar = 1 ^^^ ^^^

visit_def_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 648
def visit_def_node(node)
  if node.equal_loc
    if node.receiver
      builder.def_endless_singleton(
        token(node.def_keyword_loc),
        visit(node.receiver.is_a?(ParenthesesNode) ? node.receiver.body : node.receiver),
        token(node.operator_loc),
        token(node.name_loc),
        builder.args(token(node.lparen_loc), visit(node.parameters) || [], token(node.rparen_loc), false),
        token(node.equal_loc),
        node.body&.accept(copy_compiler(forwarding: find_forwarding(node.parameters)))
      )
    else
      builder.def_endless_method(
        token(node.def_keyword_loc),
        token(node.name_loc),
        builder.args(token(node.lparen_loc), visit(node.parameters) || [], token(node.rparen_loc), false),
        token(node.equal_loc),
        node.body&.accept(copy_compiler(forwarding: find_forwarding(node.parameters)))
      )
    end
  elsif node.receiver
    builder.def_singleton(
      token(node.def_keyword_loc),
      visit(node.receiver.is_a?(ParenthesesNode) ? node.receiver.body : node.receiver),
      token(node.operator_loc),
      token(node.name_loc),
      builder.args(token(node.lparen_loc), visit(node.parameters) || [], token(node.rparen_loc), false),
      node.body&.accept(copy_compiler(forwarding: find_forwarding(node.parameters))),
      token(node.end_keyword_loc)
    )
  else
    builder.def_method(
      token(node.def_keyword_loc),
      token(node.name_loc),
      builder.args(token(node.lparen_loc), visit(node.parameters) || [], token(node.rparen_loc), false),
      node.body&.accept(copy_compiler(forwarding: find_forwarding(node.parameters))),
      token(node.end_keyword_loc)
    )
  end
end

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

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

visit_defined_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 695
def visit_defined_node(node)
  # Very weird circumstances here where something like:
  #
  #     defined?
  #     (1)
  #
  # gets parsed in Ruby as having only the `1` expression but in parser
  # it gets parsed as having a begin. In this case we need to synthesize
  # that begin to match parser's behavior.
  if node.lparen_loc && node.keyword_loc.join(node.lparen_loc).slice.include?("\n")
    builder.keyword_cmd(
      :defined?,
      token(node.keyword_loc),
      nil,
      [
        builder.begin(
          token(node.lparen_loc),
          visit(node.value),
          token(node.rparen_loc)
        )
      ],
      nil
    )
  else
    builder.keyword_cmd(
      :defined?,
      token(node.keyword_loc),
      token(node.lparen_loc),
      [visit(node.value)],
      token(node.rparen_loc)
    )
  end
end

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

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

visit_else_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 731
def visit_else_node(node)
  visit(node.statements)
end

if foo then bar else baz end ^^^^^^^^^^^^

visit_embedded_statements_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 737
def visit_embedded_statements_node(node)
  builder.begin(
    token(node.opening_loc),
    visit(node.statements),
    token(node.closing_loc)
  )
end

“foo #{bar}” ^^^^^^

visit_embedded_variable_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 747
def visit_embedded_variable_node(node)
  visit(node.variable)
end

“foo #@bar” ^^^^^

visit_ensure_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 753
def visit_ensure_node(node)
  raise CompilationError, "Cannot directly compile ensure nodes"
end

begin; foo; ensure; bar; end ^^^^^^^^^^^^

visit_false_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 759
def visit_false_node(node)
  builder.false(token(node.location))
end

false ^^^^^

visit_find_pattern_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 765
def visit_find_pattern_node(node)
  elements = [node.left, *node.requireds, node.right]

  if node.constant
    builder.const_pattern(visit(node.constant), token(node.opening_loc), builder.find_pattern(nil, visit_all(elements), nil), token(node.closing_loc))
  else
    builder.find_pattern(token(node.opening_loc), visit_all(elements), token(node.closing_loc))
  end
end

foo => [, bar, ] ^^^^^^^^^^^

visit_flip_flop_node (node)

if foo .. bar; end ^^^^^^^^^^

Alias for: visit_range_node

visit_float_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 777
def visit_float_node(node)
  visit_numeric(node, builder.float([node.value, srange(node.location)]))
end

1.0 ^^^

visit_for_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 783
def visit_for_node(node)
  builder.for(
    token(node.for_keyword_loc),
    visit(node.index),
    token(node.in_keyword_loc),
    visit(node.collection),
    if (do_keyword_loc = node.do_keyword_loc)
      token(do_keyword_loc)
    else
      srange_semicolon(node.collection.location.end_offset, (node.statements&.location || node.end_keyword_loc).start_offset)
    end,
    visit(node.statements),
    token(node.end_keyword_loc)
  )
end

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

visit_forwarding_arguments_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 801
def visit_forwarding_arguments_node(node)
  builder.forwarded_args(token(node.location))
end

def foo(…); bar(…); end ^^^

visit_forwarding_parameter_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 807
def visit_forwarding_parameter_node(node)
  builder.forward_arg(token(node.location))
end

def foo(…); end ^^^

visit_forwarding_super_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 816
def visit_forwarding_super_node(node)
  visit_block(
    builder.keyword_cmd(
      :zsuper,
      ["super", srange_offsets(node.location.start_offset, node.location.start_offset + 5)]
    ),
    node.block
  )
end

super ^^^^^

super {} ^^^^^^^^

visit_global_variable_and_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 854
def visit_global_variable_and_write_node(node)
  builder.op_assign(
    builder.assignable(builder.gvar(token(node.name_loc))),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_global_variable_operator_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 844
def visit_global_variable_operator_write_node(node)
  builder.op_assign(
    builder.assignable(builder.gvar(token(node.name_loc))),
    [node.binary_operator_loc.slice.chomp("="), srange(node.binary_operator_loc)],
    visit(node.value)
  )
end

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

visit_global_variable_or_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 864
def visit_global_variable_or_write_node(node)
  builder.op_assign(
    builder.assignable(builder.gvar(token(node.name_loc))),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_global_variable_read_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 828
def visit_global_variable_read_node(node)
  builder.gvar(token(node.location))
end

$foo ^^^^

visit_global_variable_target_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 874
def visit_global_variable_target_node(node)
  builder.assignable(builder.gvar([node.slice, srange(node.location)]))
end

$foo, = bar ^^^^

visit_global_variable_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 834
def visit_global_variable_write_node(node)
  builder.assign(
    builder.assignable(builder.gvar(token(node.name_loc))),
    token(node.operator_loc),
    visit(node.value)
  )
end

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

visit_hash_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 880
def visit_hash_node(node)
  builder.associate(
    token(node.opening_loc),
    visit_all(node.elements),
    token(node.closing_loc)
  )
end

{} ^^

visit_hash_pattern_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 890
def visit_hash_pattern_node(node)
  elements = [*node.elements, *node.rest]

  if node.constant
    builder.const_pattern(visit(node.constant), token(node.opening_loc), builder.hash_pattern(nil, visit_all(elements), nil), token(node.closing_loc))
  else
    builder.hash_pattern(token(node.opening_loc), visit_all(elements), token(node.closing_loc))
  end
end

foo => {} ^^

visit_if_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 908
def visit_if_node(node)
  if !node.if_keyword_loc
    builder.ternary(
      visit(node.predicate),
      token(node.then_keyword_loc),
      visit(node.statements),
      token(node.subsequent.else_keyword_loc),
      visit(node.subsequent)
    )
  elsif node.if_keyword_loc.start_offset == node.location.start_offset
    builder.condition(
      token(node.if_keyword_loc),
      visit(node.predicate),
      if (then_keyword_loc = node.then_keyword_loc)
        token(then_keyword_loc)
      else
        srange_semicolon(node.predicate.location.end_offset, (node.statements&.location || node.subsequent&.location || node.end_keyword_loc).start_offset)
      end,
      visit(node.statements),
      case node.subsequent
      when IfNode
        token(node.subsequent.if_keyword_loc)
      when ElseNode
        token(node.subsequent.else_keyword_loc)
      end,
      visit(node.subsequent),
      if node.if_keyword != "elsif"
        token(node.end_keyword_loc)
      end
    )
  else
    builder.condition_mod(
      visit(node.statements),
      visit(node.subsequent),
      token(node.if_keyword_loc),
      visit(node.predicate)
    )
  end
end

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

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

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

visit_imaginary_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 950
def visit_imaginary_node(node)
  visit_numeric(node, builder.complex([Complex(0, node.numeric.value), srange(node.location)]))
end

1i ^^

visit_implicit_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 956
def visit_implicit_node(node)
  raise CompilationError, "Cannot directly compile implicit nodes"
end

{ foo: } ^^^^

visit_implicit_rest_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 962
def visit_implicit_rest_node(node)
  raise CompilationError, "Cannot compile implicit rest nodes"
end

foo { |bar,| } ^

visit_in_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 968
def visit_in_node(node)
  pattern = nil
  guard = nil

  case node.pattern
  when IfNode
    pattern = within_pattern { |compiler| node.pattern.statements.accept(compiler) }
    guard = builder.if_guard(token(node.pattern.if_keyword_loc), visit(node.pattern.predicate))
  when UnlessNode
    pattern = within_pattern { |compiler| node.pattern.statements.accept(compiler) }
    guard = builder.unless_guard(token(node.pattern.keyword_loc), visit(node.pattern.predicate))
  else
    pattern = within_pattern { |compiler| node.pattern.accept(compiler) }
  end

  builder.in_pattern(
    token(node.in_loc),
    pattern,
    guard,
    if (then_loc = node.then_loc)
      token(then_loc)
    else
      srange_semicolon(node.pattern.location.end_offset, node.statements&.location&.start_offset)
    end,
    visit(node.statements)
  )
end

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

visit_index_and_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1016
def visit_index_and_write_node(node)
  arguments = node.arguments&.arguments || []
  arguments << node.block if node.block

  builder.op_assign(
    builder.index(
      visit(node.receiver),
      token(node.opening_loc),
      visit_all(arguments),
      token(node.closing_loc)
    ),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_index_operator_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 998
def visit_index_operator_write_node(node)
  arguments = node.arguments&.arguments || []
  arguments << node.block if node.block

  builder.op_assign(
    builder.index(
      visit(node.receiver),
      token(node.opening_loc),
      visit_all(arguments),
      token(node.closing_loc)
    ),
    [node.binary_operator_loc.slice.chomp("="), srange(node.binary_operator_loc)],
    visit(node.value)
  )
end

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

visit_index_or_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1034
def visit_index_or_write_node(node)
  arguments = node.arguments&.arguments || []
  arguments << node.block if node.block

  builder.op_assign(
    builder.index(
      visit(node.receiver),
      token(node.opening_loc),
      visit_all(arguments),
      token(node.closing_loc)
    ),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_index_target_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1052
def visit_index_target_node(node)
  builder.index_asgn(
    visit(node.receiver),
    token(node.opening_loc),
    visit_all(node.arguments&.arguments || []),
    token(node.closing_loc),
  )
end

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

visit_instance_variable_and_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1089
def visit_instance_variable_and_write_node(node)
  builder.op_assign(
    builder.assignable(builder.ivar(token(node.name_loc))),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_instance_variable_operator_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1079
def visit_instance_variable_operator_write_node(node)
  builder.op_assign(
    builder.assignable(builder.ivar(token(node.name_loc))),
    [node.binary_operator_loc.slice.chomp("="), srange(node.binary_operator_loc)],
    visit(node.value)
  )
end

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

visit_instance_variable_or_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1099
def visit_instance_variable_or_write_node(node)
  builder.op_assign(
    builder.assignable(builder.ivar(token(node.name_loc))),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_instance_variable_read_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1063
def visit_instance_variable_read_node(node)
  builder.ivar(token(node.location))
end

@foo ^^^^

visit_instance_variable_target_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1109
def visit_instance_variable_target_node(node)
  builder.assignable(builder.ivar(token(node.location)))
end

@foo, = bar ^^^^

visit_instance_variable_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1069
def visit_instance_variable_write_node(node)
  builder.assign(
    builder.assignable(builder.ivar(token(node.name_loc))),
    token(node.operator_loc),
    visit(node.value)
  )
end

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

visit_integer_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1115
def visit_integer_node(node)
  visit_numeric(node, builder.integer([node.value, srange(node.location)]))
end

1 ^

visit_interpolated_match_last_line_node (node)

if /foo #{bar}/ then end ^^^^^^^^^^^^

Alias for: visit_interpolated_regular_expression_node

visit_interpolated_regular_expression_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1121
def visit_interpolated_regular_expression_node(node)
  builder.regexp_compose(
    token(node.opening_loc),
    string_nodes_from_interpolation(node, node.opening),
    [node.closing[0], srange_offsets(node.closing_loc.start_offset, node.closing_loc.start_offset + 1)],
    builder.regexp_options([node.closing[1..], srange_offsets(node.closing_loc.start_offset + 1, node.closing_loc.end_offset)])
  )
end

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

Also aliased as: visit_interpolated_match_last_line_node

visit_interpolated_string_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1136
def visit_interpolated_string_node(node)
  if node.heredoc?
    return visit_heredoc(node) { |children, closing| builder.string_compose(token(node.opening_loc), children, closing) }
  end

  builder.string_compose(
    token(node.opening_loc),
    string_nodes_from_interpolation(node, node.opening),
    token(node.closing_loc)
  )
end

“foo #{bar}” ^^^^^^^^^^^^

visit_interpolated_symbol_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1150
def visit_interpolated_symbol_node(node)
  builder.symbol_compose(
    token(node.opening_loc),
    string_nodes_from_interpolation(node, node.opening),
    token(node.closing_loc)
  )
end

:“foo #{bar}” ^^^^^^^^^^^^^

visit_interpolated_x_string_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1160
def visit_interpolated_x_string_node(node)
  if node.heredoc?
    return visit_heredoc(node) { |children, closing| builder.xstring_compose(token(node.opening_loc), children, closing) }
  end

  builder.xstring_compose(
    token(node.opening_loc),
    string_nodes_from_interpolation(node, node.opening),
    token(node.closing_loc)
  )
end

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

visit_it_local_variable_read_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1174
def visit_it_local_variable_read_node(node)
  builder.ident([:it, srange(node.location)]).updated(:lvar)
end

-> { it } ^^

visit_it_parameters_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1180
def visit_it_parameters_node(node)
  # FIXME: The builder _should_ always be a subclass of the prism builder.
  # Currently RuboCop passes in its own builder that always inherits from the
  # parser builder (which is lacking the `itarg` method). Once rubocop-ast
  # opts in to use the custom prism builder a warning can be emitted when
  # it is not the expected class, and eventually raise.
  # https://github.com/rubocop/rubocop-ast/pull/354
  if builder.is_a?(Translation::Parser::Builder)
    builder.itarg
  else
    builder.args(nil, [], nil, false)
  end
end

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

visit_keyword_hash_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1196
def visit_keyword_hash_node(node)
  builder.associate(nil, visit_all(node.elements), nil)
end

foo(bar: baz) ^^^^^^^^

visit_keyword_rest_parameter_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1205
def visit_keyword_rest_parameter_node(node)
  builder.kwrestarg(
    token(node.operator_loc),
    node.name ? [node.name, srange(node.name_loc)] : nil
  )
end

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

def foo(**); end ^^

visit_lambda_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1214
def visit_lambda_node(node)
  parameters = node.parameters
  implicit_parameters = parameters.is_a?(NumberedParametersNode) || parameters.is_a?(ItParametersNode)

  builder.block(
    builder.call_lambda(token(node.operator_loc)),
    [node.opening, srange(node.opening_loc)],
    if parameters.nil?
      builder.args(nil, [], nil, false)
    elsif implicit_parameters
      visit(node.parameters)
    else
      builder.args(
        token(node.parameters.opening_loc),
        visit(node.parameters),
        token(node.parameters.closing_loc),
        false
      )
    end,
    visit(node.body),
    [node.closing, srange(node.closing_loc)]
  )
end

-> {} ^^^^^

visit_local_variable_and_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1266
def visit_local_variable_and_write_node(node)
  builder.op_assign(
    builder.assignable(builder.ident(token(node.name_loc))),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_local_variable_operator_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1256
def visit_local_variable_operator_write_node(node)
  builder.op_assign(
    builder.assignable(builder.ident(token(node.name_loc))),
    [node.binary_operator_loc.slice.chomp("="), srange(node.binary_operator_loc)],
    visit(node.value)
  )
end

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

visit_local_variable_or_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1276
def visit_local_variable_or_write_node(node)
  builder.op_assign(
    builder.assignable(builder.ident(token(node.name_loc))),
    [node.operator_loc.slice.chomp("="), srange(node.operator_loc)],
    visit(node.value)
  )
end

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

visit_local_variable_read_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1240
def visit_local_variable_read_node(node)
  builder.ident([node.name, srange(node.location)]).updated(:lvar)
end

foo ^^^

visit_local_variable_target_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1286
def visit_local_variable_target_node(node)
  if in_pattern
    builder.assignable(builder.match_var([node.name, srange(node.location)]))
  else
    builder.assignable(builder.ident(token(node.location)))
  end
end

foo, = bar ^^^

visit_local_variable_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1246
def visit_local_variable_write_node(node)
  builder.assign(
    builder.assignable(builder.ident(token(node.name_loc))),
    token(node.operator_loc),
    visit(node.value)
  )
end

foo = 1 ^^^^^^^

visit_match_last_line_node (node)

if /foo/ then end ^^^^^

Alias for: visit_regular_expression_node

visit_match_predicate_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1296
def visit_match_predicate_node(node)
  builder.match_pattern_p(
    visit(node.value),
    token(node.operator_loc),
    within_pattern { |compiler| node.pattern.accept(compiler) }
  )
end

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

visit_match_required_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1306
def visit_match_required_node(node)
  builder.match_pattern(
    visit(node.value),
    token(node.operator_loc),
    within_pattern { |compiler| node.pattern.accept(compiler) }
  )
end

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

visit_match_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1316
def visit_match_write_node(node)
  builder.match_op(
    visit(node.call.receiver),
    token(node.call.message_loc),
    visit(node.call.arguments.arguments.first)
  )
end

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

visit_missing_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1327
def visit_missing_node(node)
  ::AST::Node.new(:missing, [], location: ::Parser::Source::Map.new(srange(node.location)))
end

A node that is missing from the syntax tree. This is only used in the case of a syntax error. The parser gem doesn’t have such a concept, so we invent our own here.

visit_module_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1333
def visit_module_node(node)
  builder.def_module(
    token(node.module_keyword_loc),
    visit(node.constant_path),
    node.body&.accept(copy_compiler(forwarding: [])),
    token(node.end_keyword_loc)
  )
end

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

visit_multi_target_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1344
def visit_multi_target_node(node)
  builder.multi_lhs(
    token(node.lparen_loc),
    visit_all(multi_target_elements(node)),
    token(node.rparen_loc)
  )
end

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

visit_multi_write_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1354
def visit_multi_write_node(node)
  elements = multi_target_elements(node)

  if elements.length == 1 && elements.first.is_a?(MultiTargetNode) && !node.rest
    elements = multi_target_elements(elements.first)
  end

  builder.multi_assign(
    builder.multi_lhs(
      token(node.lparen_loc),
      visit_all(elements),
      token(node.rparen_loc)
    ),
    token(node.operator_loc),
    visit(node.value)
  )
end

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

visit_next_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1377
def visit_next_node(node)
  builder.keyword_cmd(
    :next,
    token(node.keyword_loc),
    nil,
    visit(node.arguments) || [],
    nil
  )
end

next ^^^^

next foo ^^^^^^^^

visit_nil_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1389
def visit_nil_node(node)
  builder.nil(token(node.location))
end

nil ^^^

visit_no_keywords_parameter_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1395
def visit_no_keywords_parameter_node(node)
  if in_pattern
    builder.match_nil_pattern(token(node.operator_loc), token(node.keyword_loc))
  else
    builder.kwnilarg(token(node.operator_loc), token(node.keyword_loc))
  end
end

def foo(**nil); end ^^^^^

visit_numbered_parameters_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1405
def visit_numbered_parameters_node(node)
  builder.numargs(node.maximum)
end

-> { 1 + 2 } ^^^^^^^^^^^^^^

visit_numbered_reference_read_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1411
def visit_numbered_reference_read_node(node)
  builder.nth_ref([node.number, srange(node.location)])
end

$1 ^^

visit_optional_keyword_parameter_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1417
def visit_optional_keyword_parameter_node(node)
  builder.kwoptarg([node.name, srange(node.name_loc)], visit(node.value))
end

def foo(bar: baz); end ^^^^^^^^

visit_optional_parameter_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1423
def visit_optional_parameter_node(node)
  builder.optarg(token(node.name_loc), token(node.operator_loc), visit(node.value))
end

def foo(bar = 1); end ^^^^^^^

visit_or_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1429
def visit_or_node(node)
  builder.logical_op(:or, visit(node.left), token(node.operator_loc), visit(node.right))
end

a or b ^^^^^^

visit_parameters_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1435
def visit_parameters_node(node)
  params = []

  if node.requireds.any?
    node.requireds.each do |required|
      params <<
        if required.is_a?(RequiredParameterNode)
          visit(required)
        else
          required.accept(copy_compiler(in_destructure: true))
        end
    end
  end

  params.concat(visit_all(node.optionals)) if node.optionals.any?
  params << visit(node.rest) if !node.rest.nil? && !node.rest.is_a?(ImplicitRestNode)

  if node.posts.any?
    node.posts.each do |post|
      params <<
        if post.is_a?(RequiredParameterNode)
          visit(post)
        else
          post.accept(copy_compiler(in_destructure: true))
        end
    end
  end

  params.concat(visit_all(node.keywords)) if node.keywords.any?
  params << visit(node.keyword_rest) if !node.keyword_rest.nil?
  params << visit(node.block) if !node.block.nil?
  params
end

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

visit_parentheses_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1474
def visit_parentheses_node(node)
  builder.begin(
    token(node.opening_loc),
    visit(node.body),
    token(node.closing_loc)
  )
end

() ^^

(1) ^^^

visit_pinned_expression_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1484
def visit_pinned_expression_node(node)
  parts = node.expression.accept(copy_compiler(in_pattern: false)) # Don't treat * and similar as match_rest
  expression = builder.begin(token(node.lparen_loc), parts, token(node.rparen_loc))
  builder.pin(token(node.operator_loc), expression)
end

foo => ^(bar) ^^^^^^

visit_pinned_variable_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1492
def visit_pinned_variable_node(node)
  builder.pin(token(node.operator_loc), visit(node.variable))
end

foo = 1 and bar => ^foo ^^^^

visit_post_execution_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1497
def visit_post_execution_node(node)
  builder.postexe(
    token(node.keyword_loc),
    token(node.opening_loc),
    visit(node.statements),
    token(node.closing_loc)
  )
end

END {}

visit_pre_execution_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1507
def visit_pre_execution_node(node)
  builder.preexe(
    token(node.keyword_loc),
    token(node.opening_loc),
    visit(node.statements),
    token(node.closing_loc)
  )
end

BEGIN {}

visit_program_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1517
def visit_program_node(node)
  visit(node.statements)
end

The top-level program node.

visit_range_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1523
def visit_range_node(node)
  if node.exclude_end?
    builder.range_exclusive(
      visit(node.left),
      token(node.operator_loc),
      visit(node.right)
    )
  else
    builder.range_inclusive(
      visit(node.left),
      token(node.operator_loc),
      visit(node.right)
    )
  end
end

0..5 ^^^^

Also aliased as: visit_flip_flop_node

visit_rational_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1545
def visit_rational_node(node)
  visit_numeric(node, builder.rational([node.value, srange(node.location)]))
end

1r ^^

visit_redo_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1551
def visit_redo_node(node)
  builder.keyword_cmd(:redo, token(node.location))
end

redo ^^^^

visit_regular_expression_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1557
def visit_regular_expression_node(node)
  parts =
    if node.content == ""
      []
    elsif node.content.include?("\n")
      string_nodes_from_line_continuations(node.unescaped, node.content, node.content_loc.start_offset, node.opening)
    else
      [builder.string_internal([node.unescaped, srange(node.content_loc)])]
    end

  builder.regexp_compose(
    token(node.opening_loc),
    parts,
    [node.closing[0], srange_offsets(node.closing_loc.start_offset, node.closing_loc.start_offset + 1)],
    builder.regexp_options([node.closing[1..], srange_offsets(node.closing_loc.start_offset + 1, node.closing_loc.end_offset)])
  )
end

/foo/ ^^^^^

Also aliased as: visit_match_last_line_node

visit_required_keyword_parameter_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1581
def visit_required_keyword_parameter_node(node)
  builder.kwarg([node.name, srange(node.name_loc)])
end

def foo(bar:); end ^^^^

visit_required_parameter_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1587
def visit_required_parameter_node(node)
  builder.arg(token(node.location))
end

def foo(bar); end ^^^

visit_rescue_modifier_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1593
def visit_rescue_modifier_node(node)
  builder.begin_body(
    visit(node.expression),
    [
      builder.rescue_body(
        token(node.keyword_loc),
        nil,
        nil,
        nil,
        nil,
        visit(node.rescue_expression)
      )
    ]
  )
end

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

visit_rescue_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1611
def visit_rescue_node(node)
  raise CompilationError, "Cannot directly compile rescue nodes"
end

begin; rescue; end ^^^^^^^

visit_rest_parameter_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1620
def visit_rest_parameter_node(node)
  builder.restarg(token(node.operator_loc), token(node.name_loc))
end

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

def foo(*); end ^

visit_retry_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1626
def visit_retry_node(node)
  builder.keyword_cmd(:retry, token(node.location))
end

retry ^^^^^

visit_return_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1635
def visit_return_node(node)
  builder.keyword_cmd(
    :return,
    token(node.keyword_loc),
    nil,
    visit(node.arguments) || [],
    nil
  )
end

return ^^^^^^

return 1 ^^^^^^^^

visit_self_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1647
def visit_self_node(node)
  builder.self(token(node.location))
end

self ^^^^

visit_shareable_constant_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1652
def visit_shareable_constant_node(node)
  visit(node.write)
end

A shareable constant.

visit_singleton_class_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1658
def visit_singleton_class_node(node)
  builder.def_sclass(
    token(node.class_keyword_loc),
    token(node.operator_loc),
    visit(node.expression),
    node.body&.accept(copy_compiler(forwarding: [])),
    token(node.end_keyword_loc)
  )
end

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

visit_source_encoding_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1670
def visit_source_encoding_node(node)
  builder.accessible(builder.__ENCODING__(token(node.location)))
end

ENCODING ^^^^^^^^^^^^

visit_source_file_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1676
def visit_source_file_node(node)
  builder.accessible(builder.__FILE__(token(node.location)))
end

FILE ^^^^^^^^

visit_source_line_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1682
def visit_source_line_node(node)
  builder.accessible(builder.__LINE__(token(node.location)))
end

LINE ^^^^^^^^

visit_splat_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1694
def visit_splat_node(node)
  if node.expression.nil? && forwarding.include?(:*)
    builder.forwarded_restarg(token(node.operator_loc))
  elsif in_destructure
    builder.restarg(token(node.operator_loc), token(node.expression&.location))
  elsif in_pattern
    builder.match_rest(token(node.operator_loc), token(node.expression&.location))
  else
    builder.splat(token(node.operator_loc), visit(node.expression))
  end
end

foo(*bar) ^^^^

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

def foo(); bar(); end ^

visit_statements_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1707
def visit_statements_node(node)
  builder.compstmt(visit_all(node.body))
end

A list of statements.

visit_string_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1713
def visit_string_node(node)
  if node.heredoc?
    visit_heredoc(node.to_interpolated) { |children, closing| builder.string_compose(token(node.opening_loc), children, closing) }
  elsif node.opening == "?"
    builder.character([node.unescaped, srange(node.location)])
  elsif node.opening&.start_with?("%") && node.unescaped.empty?
    builder.string_compose(token(node.opening_loc), [], token(node.closing_loc))
  else
    parts =
      if node.content.include?("\n")
        string_nodes_from_line_continuations(node.unescaped, node.content, node.content_loc.start_offset, node.opening)
      else
        [builder.string_internal([node.unescaped, srange(node.content_loc)])]
      end

    builder.string_compose(
      token(node.opening_loc),
      parts,
      token(node.closing_loc)
    )
  end
end

“foo” ^^^^^

visit_super_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1738
def visit_super_node(node)
  arguments = node.arguments&.arguments || []
  block = node.block

  if block.is_a?(BlockArgumentNode)
    arguments = [*arguments, block]
    block = nil
  end

  visit_block(
    builder.keyword_cmd(
      :super,
      token(node.keyword_loc),
      token(node.lparen_loc),
      visit_all(arguments),
      token(node.rparen_loc)
    ),
    block
  )
end

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

visit_symbol_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1761
def visit_symbol_node(node)
  if node.closing_loc.nil?
    if node.opening_loc.nil?
      builder.symbol_internal([node.unescaped, srange(node.location)])
    else
      builder.symbol([node.unescaped, srange(node.location)])
    end
  else
    parts =
      if node.value == ""
        []
      elsif node.value.include?("\n")
        string_nodes_from_line_continuations(node.unescaped, node.value, node.value_loc.start_offset, node.opening)
      else
        [builder.string_internal([node.unescaped, srange(node.value_loc)])]
      end

    builder.symbol_compose(
      token(node.opening_loc),
      parts,
      token(node.closing_loc)
    )
  end
end

:foo ^^^^

visit_true_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1788
def visit_true_node(node)
  builder.true(token(node.location))
end

true ^^^^

visit_undef_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1794
def visit_undef_node(node)
  builder.undef_method(token(node.keyword_loc), visit_all(node.names))
end

undef foo ^^^^^^^^^

visit_unless_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1803
def visit_unless_node(node)
  if node.keyword_loc.start_offset == node.location.start_offset
    builder.condition(
      token(node.keyword_loc),
      visit(node.predicate),
      if (then_keyword_loc = node.then_keyword_loc)
        token(then_keyword_loc)
      else
        srange_semicolon(node.predicate.location.end_offset, (node.statements&.location || node.else_clause&.location || node.end_keyword_loc).start_offset)
      end,
      visit(node.else_clause),
      token(node.else_clause&.else_keyword_loc),
      visit(node.statements),
      token(node.end_keyword_loc)
    )
  else
    builder.condition_mod(
      visit(node.else_clause),
      visit(node.statements),
      token(node.keyword_loc),
      visit(node.predicate)
    )
  end
end

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

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

visit_until_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1833
def visit_until_node(node)
  if node.location.start_offset == node.keyword_loc.start_offset
    builder.loop(
      :until,
      token(node.keyword_loc),
      visit(node.predicate),
      if (do_keyword_loc = node.do_keyword_loc)
        token(do_keyword_loc)
      else
        srange_semicolon(node.predicate.location.end_offset, (node.statements&.location || node.closing_loc).start_offset)
      end,
      visit(node.statements),
      token(node.closing_loc)
    )
  else
    builder.loop_mod(
      :until,
      visit(node.statements),
      token(node.keyword_loc),
      visit(node.predicate)
    )
  end
end

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

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

visit_when_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1859
def visit_when_node(node)
  builder.when(
    token(node.keyword_loc),
    visit_all(node.conditions),
    if (then_keyword_loc = node.then_keyword_loc)
      token(then_keyword_loc)
    else
      srange_semicolon(node.conditions.last.location.end_offset, node.statements&.location&.start_offset)
    end,
    visit(node.statements)
  )
end

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

visit_while_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1877
def visit_while_node(node)
  if node.location.start_offset == node.keyword_loc.start_offset
    builder.loop(
      :while,
      token(node.keyword_loc),
      visit(node.predicate),
      if (do_keyword_loc = node.do_keyword_loc)
        token(do_keyword_loc)
      else
        srange_semicolon(node.predicate.location.end_offset, (node.statements&.location || node.closing_loc).start_offset)
      end,
      visit(node.statements),
      token(node.closing_loc)
    )
  else
    builder.loop_mod(
      :while,
      visit(node.statements),
      token(node.keyword_loc),
      visit(node.predicate)
    )
  end
end

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

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

visit_x_string_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1903
def visit_x_string_node(node)
  if node.heredoc?
    return visit_heredoc(node.to_interpolated) { |children, closing| builder.xstring_compose(token(node.opening_loc), children, closing) }
  end

  parts =
    if node.content == ""
      []
    elsif node.content.include?("\n")
      string_nodes_from_line_continuations(node.unescaped, node.content, node.content_loc.start_offset, node.opening)
    else
      [builder.string_internal([node.unescaped, srange(node.content_loc)])]
    end

  builder.xstring_compose(
    token(node.opening_loc),
    parts,
    token(node.closing_loc)
  )
end

foo ^^^^^

visit_yield_node (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1929
def visit_yield_node(node)
  builder.keyword_cmd(
    :yield,
    token(node.keyword_loc),
    token(node.lparen_loc),
    visit(node.arguments) || [],
    token(node.rparen_loc)
  )
end

yield ^^^^^

yield 1 ^^^^^^^

Private Instance Methods

copy_compiler (forwarding: self.forwarding, in_destructure: self.in_destructure, in_pattern: self.in_pattern)

Source

# File lib/prism/translation/parser/compiler.rb, line 1943
def copy_compiler(forwarding: self.forwarding, in_destructure: self.in_destructure, in_pattern: self.in_pattern)
  Compiler.new(parser, offset_cache, forwarding: forwarding, in_destructure: in_destructure, in_pattern: in_pattern)
end

Initialize a new compiler with the given option overrides, used to visit a subtree with the given options.

find_forwarding (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1950
def find_forwarding(node)
  return [] if node.nil?

  forwarding = []
  forwarding << :* if node.rest.is_a?(RestParameterNode) && node.rest.name.nil?
  forwarding << :** if node.keyword_rest.is_a?(KeywordRestParameterNode) && node.keyword_rest.name.nil?
  forwarding << :& if !node.block.nil? && node.block.name.nil?
  forwarding |= [:&, :"..."] if node.keyword_rest.is_a?(ForwardingParameterNode)

  forwarding
end

When , *, &, or … are used as an argument in a method call, we check if they were allowed by the current context. To determine that we build this lookup table.

multi_target_elements (node)

Source

# File lib/prism/translation/parser/compiler.rb, line 1963
def multi_target_elements(node)
  elements = [*node.lefts]
  elements << node.rest if !node.rest.nil? && !node.rest.is_a?(ImplicitRestNode)
  elements.concat(node.rights)
  elements
end

Returns the set of targets for a MultiTargetNode or a MultiWriteNode.

numeric_negate (message_loc, receiver)

Source

# File lib/prism/translation/parser/compiler.rb, line 1975
def numeric_negate(message_loc, receiver)
  case receiver.type
  when :integer_node, :float_node
    receiver.copy(value: -receiver.value, location: message_loc.join(receiver.location))
  when :rational_node
    receiver.copy(numerator: -receiver.numerator, location: message_loc.join(receiver.location))
  when :imaginary_node
    receiver.copy(numeric: numeric_negate(message_loc, receiver.numeric), location: message_loc.join(receiver.location))
  end
end

Negate the value of a numeric node. This is a special case where you have a negative sign on one line and then a number on the next line. In normal Ruby, this will always be a method call. The parser gem, however, marks this as a numeric literal. We have to massage the tree here to get it into the correct form.

procarg0? (parameters)

Source

# File lib/prism/translation/parser/compiler.rb, line 1989
def procarg0?(parameters)
  parameters &&
    parameters.requireds.length == 1 &&
    parameters.optionals.empty? &&
    parameters.rest.nil? &&
    parameters.posts.empty? &&
    parameters.keywords.empty? &&
    parameters.keyword_rest.nil? &&
    parameters.block.nil?
end

Blocks can have a special set of parameters that automatically expand when given arrays if they have a single required parameter and no other parameters.

srange (location)

Source

# File lib/prism/translation/parser/compiler.rb, line 2006
def srange(location)
  Range.new(source_buffer, offset_cache[location.start_offset], offset_cache[location.end_offset]) if location
end

Constructs a new source range from the given start and end offsets.

srange_offsets (start_offset, end_offset)

Source

# File lib/prism/translation/parser/compiler.rb, line 2011
def srange_offsets(start_offset, end_offset)
  Range.new(source_buffer, offset_cache[start_offset], offset_cache[end_offset])
end

Constructs a new source range from the given start and end offsets.

srange_semicolon (start_offset, end_offset)

Source

# File lib/prism/translation/parser/compiler.rb, line 2021
def srange_semicolon(start_offset, end_offset)
  if (match = source_buffer.source.byteslice(start_offset...end_offset)[/\A\s*;/])
    final_offset = start_offset + match.bytesize
    [";", Range.new(source_buffer, offset_cache[final_offset - 1], offset_cache[final_offset])]
  end
end

Constructs a new source range by finding a semicolon between the given start offset and end offset. If the semicolon is not found, it returns nil. Importantly it does not search past newlines or comments.

Note that end_offset is allowed to be nil, in which case this will search until the end of the string.

string_nodes_from_interpolation (node, opening)

Source

# File lib/prism/translation/parser/compiler.rb, line 2138
def string_nodes_from_interpolation(node, opening)
  node.parts.flat_map do |part|
    if part.type == :string_node && part.content.include?("\n") && part.opening_loc.nil?
      string_nodes_from_line_continuations(part.unescaped, part.content, part.content_loc.start_offset, opening)
    else
      visit(part)
    end
  end
end

When the content of a string node is split across multiple lines, the parser gem creates individual string nodes for each line the content is part of.

string_nodes_from_line_continuations (unescaped, escaped, start_offset, opening)

Source

# File lib/prism/translation/parser/compiler.rb, line 2150
def string_nodes_from_line_continuations(unescaped, escaped, start_offset, opening)
  unescaped = unescaped.lines
  escaped = escaped.lines
  percent_array = opening&.start_with?("%w", "%W", "%i", "%I")
  regex = opening == "/" || opening&.start_with?("%r")

  # Non-interpolating strings
  if opening&.end_with?("'") || opening&.start_with?("%q", "%s", "%w", "%i")
    current_length = 0
    current_line = +""

    escaped.filter_map.with_index do |escaped_line, index|
      unescaped_line = unescaped.fetch(index, "")
      current_length += escaped_line.bytesize
      current_line << unescaped_line

      # Glue line continuations together. Only %w and %i arrays can contain these.
      if percent_array && escaped_line[/(\\)*\n$/, 1]&.length&.odd?
        next unless index == escaped.count - 1
      end
      s = builder.string_internal([current_line, srange_offsets(start_offset, start_offset + current_length)])
      start_offset += escaped_line.bytesize
      current_line = +""
      current_length = 0
      s
    end
  else
    escaped_lengths = []
    normalized_lengths = []
    # Keeps track of where an unescaped line should start a new token. An unescaped
    # \n would otherwise be indistinguishable from the actual newline at the end of
    # of the line. The parser gem only emits a new string node at "real" newlines,
    # line continuations don't start a new node as well.
    do_next_tokens = []

    escaped
      .chunk_while { |before, after| before[/(\\*)\r?\n$/, 1]&.length&.odd? || false }
      .each do |lines|
        escaped_lengths << lines.sum(&:bytesize)

        unescaped_lines_count =
          if regex
            0 # Will always be preserved as is
          else
            lines.sum do |line|
              count = line.scan(/(\\*)n/).count { |(backslashes)| backslashes&.length&.odd? }
              count -= 1 if !line.end_with?("\n") && count > 0
              count
            end
          end

        extra = 1
        extra = lines.count if percent_array # Account for line continuations in percent arrays

        normalized_lengths.concat(Array.new(unescaped_lines_count + extra, 0))
        normalized_lengths[-1] = lines.sum { |line| line.bytesize }
        do_next_tokens.concat(Array.new(unescaped_lines_count + extra, false))
        do_next_tokens[-1] = true
      end

    current_line = +""
    current_normalized_length = 0

    emitted_count = 0
    unescaped.filter_map.with_index do |unescaped_line, index|
      current_line << unescaped_line
      current_normalized_length += normalized_lengths.fetch(index, 0)

      if do_next_tokens[index]
        inner_part = builder.string_internal([current_line, srange_offsets(start_offset, start_offset + current_normalized_length)])
        start_offset += escaped_lengths.fetch(emitted_count, 0)
        current_line = +""
        current_normalized_length = 0
        emitted_count += 1
        inner_part
      else
        nil
      end
    end
  end
end

Create parser string nodes from a single prism node. The parser gem “glues” strings together when a line continuation is encountered.

token (location)

Source

# File lib/prism/translation/parser/compiler.rb, line 2029
def token(location)
  [location.slice, Range.new(source_buffer, offset_cache[location.start_offset], offset_cache[location.end_offset])] if location
end

Transform a location into a token that the parser gem expects.

visit_block (call, block)

Source

# File lib/prism/translation/parser/compiler.rb, line 2034
def visit_block(call, block)
  if block
    parameters = block.parameters
    implicit_parameters = parameters.is_a?(NumberedParametersNode) || parameters.is_a?(ItParametersNode)

    builder.block(
      call,
      token(block.opening_loc),
      if parameters.nil?
        builder.args(nil, [], nil, false)
      elsif implicit_parameters
        visit(parameters)
      else
        builder.args(
          token(parameters.opening_loc),
          if procarg0?(parameters.parameters)
            parameter = parameters.parameters.requireds.first
            visited = parameter.is_a?(RequiredParameterNode) ? visit(parameter) : parameter.accept(copy_compiler(in_destructure: true))
            [builder.procarg0(visited)].concat(visit_all(parameters.locals))
          else
            visit(parameters)
          end,
          token(parameters.closing_loc),
          false
        )
      end,
      visit(block.body),
      token(block.closing_loc)
    )
  else
    call
  end
end

Visit a block node on a call.

visit_heredoc (node) { |children, closing_t| ... }

Source

# File lib/prism/translation/parser/compiler.rb, line 2069
def visit_heredoc(node)
  children = Array.new
  indented = false

  # If this is a dedenting heredoc, then we need to insert the opening
  # content into the children as well.
  if node.opening.start_with?("<<~") && node.parts.length > 0 && !node.parts.first.is_a?(StringNode)
    location = node.parts.first.location
    location = location.copy(start_offset: location.start_offset - location.start_line_slice.bytesize)
    children << builder.string_internal(token(location))
    indented = true
  end

  node.parts.each do |part|
    pushing =
      if part.is_a?(StringNode) && part.content.include?("\n")
        string_nodes_from_line_continuations(part.unescaped, part.content, part.location.start_offset, node.opening)
      else
        [visit(part)]
      end

    pushing.each do |child|
      if child.type == :str && child.children.last == ""
        # nothing
      elsif child.type == :str && children.last && children.last.type == :str && !children.last.children.first.end_with?("\n")
        appendee = children[-1]

        location = appendee.loc
        location = location.with_expression(location.expression.join(child.loc.expression))

        children[-1] = appendee.updated(:str, ["#{appendee.children.first}#{child.children.first}"], location: location)
      else
        children << child
      end
    end
  end

  closing = node.closing
  closing_t = [closing.chomp, srange_offsets(node.closing_loc.start_offset, node.closing_loc.end_offset - (closing[/\s+$/]&.length || 0))]
  composed = yield children, closing_t

  composed = composed.updated(nil, children[1..-1]) if indented
  composed
end

Visit a heredoc that can be either a string or an xstring.

visit_numeric (node, value)

Source

# File lib/prism/translation/parser/compiler.rb, line 2115
def visit_numeric(node, value)
  if (slice = node.slice).match?(/^[+-]/)
    builder.unary_num(
      [slice[0].to_sym, srange_offsets(node.location.start_offset, node.location.start_offset + 1)],
      value
    )
  else
    value
  end
end

Visit a numeric node and account for the optional sign.

within_pattern () { |copy_compiler(in_pattern: true)| ... }

Source

# File lib/prism/translation/parser/compiler.rb, line 2127
def within_pattern
  begin
    parser.pattern_variables.push
    yield copy_compiler(in_pattern: true)
  ensure
    parser.pattern_variables.pop
  end
end

Within the given block, track that we’re within a pattern.