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_find(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),
            ),
            srange_find(node.message_loc.end_offset, node.arguments.arguments.last.location.start_offset, "="),
            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)),
        srange_find(message_loc.end_offset, node.arguments.location.start_offset, "="),
        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_find(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_find(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_find(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_find(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_find(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_find(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_find(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_find (start_offset, end_offset, character)

Source

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

Constructs a new source range by finding the given character between the given start offset and end offset. If the needle 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.

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.

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.