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)

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

# File lib/prism/translation/parser/compiler.rb, line 39
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

Public Instance Methods

visit_alias_global_variable_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 58
def visit_alias_global_variable_node(node)
  builder.alias(token(node.keyword_loc), visit(node.new_name), visit(node.old_name))
end
visit_alias_method_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 52
def visit_alias_method_node(node)
  builder.alias(token(node.keyword_loc), visit(node.new_name), visit(node.old_name))
end
visit_alternation_pattern_node (node)

foo => bar | baz

^^^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 64
def visit_alternation_pattern_node(node)
  builder.match_alt(visit(node.left), token(node.operator_loc), visit(node.right))
end
visit_and_node (node)

a and b ^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 70
def visit_and_node(node)
  builder.logical_op(:and, visit(node.left), token(node.operator_loc), visit(node.right))
end
visit_arguments_node (node)

foo(bar)

^^^
# File lib/prism/translation/parser/compiler.rb, line 105
def visit_arguments_node(node)
  visit_all(node.arguments)
end
visit_array_node (node)

^^

# File lib/prism/translation/parser/compiler.rb, line 76
def visit_array_node(node)
  builder.array(token(node.opening_loc), visit_all(node.elements), token(node.closing_loc))
end
visit_array_pattern_node (node)

foo => [bar]

^^^^^
# File lib/prism/translation/parser/compiler.rb, line 82
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
visit_assoc_node (node)

{ a: 1 }

^^^^
# File lib/prism/translation/parser/compiler.rb, line 111
def visit_assoc_node(node)
  key = node.key

  if in_pattern
    if node.value.is_a?(ImplicitNode)
      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
    elsif key.opening.nil?
      builder.pair_keyword([key.unescaped, srange(key.location)], visit(node.value))
    else
      builder.pair_quoted(token(key.opening_loc), [builder.string_internal([key.unescaped, srange(key.value_loc)])], token(key.closing_loc), visit(node.value))
    end
  elsif node.value.is_a?(ImplicitNode)
    if (value = node.value.value).is_a?(LocalVariableReadNode)
      builder.pair_keyword(
        [key.unescaped, srange(key)],
        builder.ident([value.name, srange(key.value_loc)]).updated(:lvar)
      )
    else
      builder.pair_label([key.unescaped, srange(key.location)])
    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
visit_assoc_splat_node (node)

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

^^

{ **foo }

^^^^^
# File lib/prism/translation/parser/compiler.rb, line 160
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
visit_back_reference_read_node (node)

$+ ^^

# File lib/prism/translation/parser/compiler.rb, line 172
def visit_back_reference_read_node(node)
  builder.back_ref(token(node.location))
end
visit_begin_node (node)

begin end ^^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 178
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 || (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
visit_block_argument_node (node)

foo(&bar)

^^^^
# File lib/prism/translation/parser/compiler.rb, line 216
def visit_block_argument_node(node)
  builder.block_pass(token(node.operator_loc), visit(node.expression))
end
visit_block_local_variable_node (node)

foo { |; bar| }

^^^
# File lib/prism/translation/parser/compiler.rb, line 222
def visit_block_local_variable_node(node)
  builder.shadowarg(token(node.location))
end
visit_block_node (node)

A block on a keyword or method call.

# File lib/prism/translation/parser/compiler.rb, line 227
def visit_block_node(node)
  raise CompilationError, "Cannot directly compile block nodes"
end
visit_block_parameter_node (node)

def foo(&bar); end

^^^^
# File lib/prism/translation/parser/compiler.rb, line 233
def visit_block_parameter_node(node)
  builder.blockarg(token(node.operator_loc), token(node.name_loc))
end
visit_block_parameters_node (node)

A block’s parameters.

# File lib/prism/translation/parser/compiler.rb, line 238
def visit_block_parameters_node(node)
  [*visit(node.parameters)].concat(visit_all(node.locals))
end
visit_break_node (node)

break ^^^^^

break foo ^^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 247
def visit_break_node(node)
  builder.keyword_cmd(:break, token(node.keyword_loc), nil, visit(node.arguments) || [], nil)
end
visit_call_and_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 352
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
visit_call_node (node)

foo ^^^

foo.bar ^^^^^^^

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

# File lib/prism/translation/parser/compiler.rb, line 259
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
visit_call_operator_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 333
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
visit_call_or_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 371
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
visit_call_target_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 390
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
visit_capture_pattern_node (node)

foo => bar => baz

^^^^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 402
def visit_capture_pattern_node(node)
  builder.match_as(visit(node.value), token(node.operator_loc), visit(node.target))
end
visit_case_match_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 421
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
visit_case_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 408
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
visit_class_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 434
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
visit_class_variable_and_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 473
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
visit_class_variable_operator_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 463
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
visit_class_variable_or_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 483
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
visit_class_variable_read_node (node)

@@foo ^^^^^

# File lib/prism/translation/parser/compiler.rb, line 447
def visit_class_variable_read_node(node)
  builder.cvar(token(node.location))
end
visit_class_variable_target_node (node)

@@foo, = bar ^^^^^

# File lib/prism/translation/parser/compiler.rb, line 493
def visit_class_variable_target_node(node)
  builder.assignable(builder.cvar(token(node.location)))
end
visit_class_variable_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 453
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
visit_constant_and_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 524
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
visit_constant_operator_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 514
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
visit_constant_or_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 534
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
visit_constant_path_and_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 590
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
visit_constant_path_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 550
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
visit_constant_path_operator_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 580
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
visit_constant_path_or_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 600
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
visit_constant_path_target_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 610
def visit_constant_path_target_node(node)
  builder.assignable(visit_constant_path_node(node))
end
visit_constant_path_write_node (node)

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

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

# File lib/prism/translation/parser/compiler.rb, line 570
def visit_constant_path_write_node(node)
  builder.assign(
    builder.assignable(visit(node.target)),
    token(node.operator_loc),
    visit(node.value)
  )
end
visit_constant_read_node (node)

Foo ^^^

# File lib/prism/translation/parser/compiler.rb, line 499
def visit_constant_read_node(node)
  builder.const([node.name, srange(node.location)])
end
visit_constant_target_node (node)

Foo, = bar ^^^

# File lib/prism/translation/parser/compiler.rb, line 544
def visit_constant_target_node(node)
  builder.assignable(builder.const([node.name, srange(node.location)]))
end
visit_constant_write_node (node)

Foo = 1 ^^^^^^^

Foo, Bar = 1 ^^^ ^^^

# File lib/prism/translation/parser/compiler.rb, line 508
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
visit_def_node (node)

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

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

# File lib/prism/translation/parser/compiler.rb, line 619
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
visit_defined_node (node)

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

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

# File lib/prism/translation/parser/compiler.rb, line 666
def visit_defined_node(node)
  builder.keyword_cmd(
    :defined?,
    token(node.keyword_loc),
    token(node.lparen_loc),
    [visit(node.value)],
    token(node.rparen_loc)
  )
end
visit_else_node (node)

if foo then bar else baz end

^^^^^^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 678
def visit_else_node(node)
  visit(node.statements)
end
visit_embedded_statements_node (node)

“foo #{bar}”

^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 684
def visit_embedded_statements_node(node)
  builder.begin(
    token(node.opening_loc),
    visit(node.statements),
    token(node.closing_loc)
  )
end
visit_embedded_variable_node (node)

“foo #@bar”

^^^^^
# File lib/prism/translation/parser/compiler.rb, line 694
def visit_embedded_variable_node(node)
  visit(node.variable)
end
visit_ensure_node (node)

begin; foo; ensure; bar; end

^^^^^^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 700
def visit_ensure_node(node)
  raise CompilationError, "Cannot directly compile ensure nodes"
end
visit_false_node (node)

false ^^^^^

# File lib/prism/translation/parser/compiler.rb, line 706
def visit_false_node(node)
  builder.false(token(node.location))
end
visit_find_pattern_node (node)

foo => [*, bar, *]

^^^^^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 712
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
visit_flip_flop_node (node)

if foo .. bar; end

^^^^^^^^^^
Alias for: visit_range_node
visit_float_node (node)

1.0 ^^^

# File lib/prism/translation/parser/compiler.rb, line 724
def visit_float_node(node)
  visit_numeric(node, builder.float([node.value, srange(node.location)]))
end
visit_for_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 730
def visit_for_node(node)
  builder.for(
    token(node.for_keyword_loc),
    visit(node.index),
    token(node.in_keyword_loc),
    visit(node.collection),
    if node.do_keyword_loc
      token(node.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
visit_forwarding_arguments_node (node)

def foo(…); bar(…); end

^^^
# File lib/prism/translation/parser/compiler.rb, line 748
def visit_forwarding_arguments_node(node)
  builder.forwarded_args(token(node.location))
end
visit_forwarding_parameter_node (node)

def foo(…); end

^^^
# File lib/prism/translation/parser/compiler.rb, line 754
def visit_forwarding_parameter_node(node)
  builder.forward_arg(token(node.location))
end
visit_forwarding_super_node (node)

super ^^^^^

super {} ^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 763
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
visit_global_variable_and_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 801
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
visit_global_variable_operator_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 791
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
visit_global_variable_or_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 811
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
visit_global_variable_read_node (node)

$foo ^^^^

# File lib/prism/translation/parser/compiler.rb, line 775
def visit_global_variable_read_node(node)
  builder.gvar(token(node.location))
end
visit_global_variable_target_node (node)

$foo, = bar ^^^^

# File lib/prism/translation/parser/compiler.rb, line 821
def visit_global_variable_target_node(node)
  builder.assignable(builder.gvar([node.slice, srange(node.location)]))
end
visit_global_variable_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 781
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
visit_hash_node (node)

{} ^^

# File lib/prism/translation/parser/compiler.rb, line 827
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)

foo => {}

^^
# File lib/prism/translation/parser/compiler.rb, line 837
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
visit_if_node (node)

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

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

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

# File lib/prism/translation/parser/compiler.rb, line 855
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 node.then_keyword_loc
        token(node.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
visit_imaginary_node (node)

1i ^^

# File lib/prism/translation/parser/compiler.rb, line 897
def visit_imaginary_node(node)
  visit_numeric(node, builder.complex([Complex(0, node.numeric.value), srange(node.location)]))
end
visit_implicit_node (node)

{ foo: }

^^^^
# File lib/prism/translation/parser/compiler.rb, line 903
def visit_implicit_node(node)
  raise CompilationError, "Cannot directly compile implicit nodes"
end
visit_implicit_rest_node (node)

foo { |bar,| }

^
# File lib/prism/translation/parser/compiler.rb, line 909
def visit_implicit_rest_node(node)
  raise CompilationError, "Cannot compile implicit rest nodes"
end
visit_in_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 915
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,
    srange_find(node.pattern.location.end_offset, node.statements&.location&.start_offset, [";", "then"]),
    visit(node.statements)
  )
end
visit_index_and_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 959
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
visit_index_operator_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 941
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
visit_index_or_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 977
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
visit_index_target_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 995
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
visit_instance_variable_and_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1032
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
visit_instance_variable_operator_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1022
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
visit_instance_variable_or_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1042
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
visit_instance_variable_read_node (node)

@foo ^^^^

# File lib/prism/translation/parser/compiler.rb, line 1006
def visit_instance_variable_read_node(node)
  builder.ivar(token(node.location))
end
visit_instance_variable_target_node (node)

@foo, = bar ^^^^

# File lib/prism/translation/parser/compiler.rb, line 1052
def visit_instance_variable_target_node(node)
  builder.assignable(builder.ivar(token(node.location)))
end
visit_instance_variable_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1012
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
visit_integer_node (node)

1 ^

# File lib/prism/translation/parser/compiler.rb, line 1058
def visit_integer_node(node)
  visit_numeric(node, builder.integer([node.value, srange(node.location)]))
end
visit_interpolated_match_last_line_node (node)

if /foo #{bar}/ then end

^^^^^^^^^^^^
visit_interpolated_regular_expression_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1064
def visit_interpolated_regular_expression_node(node)
  builder.regexp_compose(
    token(node.opening_loc),
    visit_all(node.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
visit_interpolated_string_node (node)

“foo #{bar}” ^^^^^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1079
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

  parts = if node.parts.one? { |part| part.type == :string_node }
    node.parts.flat_map do |node|
      if node.type == :string_node && node.unescaped.lines.count >= 2
        start_offset = node.content_loc.start_offset

        node.unescaped.lines.map do |line|
          end_offset = start_offset + line.length
          offsets = srange_offsets(start_offset, end_offset)
          start_offset = end_offset

          builder.string_internal([line, offsets])
        end
      else
        visit(node)
      end
    end
  else
    visit_all(node.parts)
  end

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

:“foo #{bar}” ^^^^^^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1113
def visit_interpolated_symbol_node(node)
  builder.symbol_compose(
    token(node.opening_loc),
    visit_all(node.parts),
    token(node.closing_loc)
  )
end
visit_interpolated_x_string_node (node)

‘foo #{bar}` ^^^^^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1123
def visit_interpolated_x_string_node(node)
  if node.heredoc?
    visit_heredoc(node) { |children, closing| builder.xstring_compose(token(node.opening_loc), children, closing) }
  else
    builder.xstring_compose(
      token(node.opening_loc),
      visit_all(node.parts),
      token(node.closing_loc)
    )
  end
end
visit_it_local_variable_read_node (node)

-> { it }

^^
# File lib/prism/translation/parser/compiler.rb, line 1137
def visit_it_local_variable_read_node(node)
  builder.ident([:it, srange(node.location)]).updated(:lvar)
end
visit_it_parameters_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1143
def visit_it_parameters_node(node)
  builder.args(nil, [], nil, false)
end
visit_keyword_hash_node (node)

foo(bar: baz)

^^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 1149
def visit_keyword_hash_node(node)
  builder.associate(nil, visit_all(node.elements), nil)
end
visit_keyword_rest_parameter_node (node)

def foo(**bar); end

^^^^^

def foo(**); end

^^
# File lib/prism/translation/parser/compiler.rb, line 1158
def visit_keyword_rest_parameter_node(node)
  builder.kwrestarg(
    token(node.operator_loc),
    node.name ? [node.name, srange(node.name_loc)] : nil
  )
end
visit_lambda_node (node)

-> {} ^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1167
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,
    node.body&.accept(copy_compiler(forwarding: implicit_parameters ? [] : find_forwarding(parameters&.parameters))),
    [node.closing, srange(node.closing_loc)]
  )
end
visit_local_variable_and_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1219
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
visit_local_variable_operator_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1209
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
visit_local_variable_or_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1229
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
visit_local_variable_read_node (node)

foo ^^^

# File lib/prism/translation/parser/compiler.rb, line 1193
def visit_local_variable_read_node(node)
  builder.ident([node.name, srange(node.location)]).updated(:lvar)
end
visit_local_variable_target_node (node)

foo, = bar ^^^

# File lib/prism/translation/parser/compiler.rb, line 1239
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
visit_local_variable_write_node (node)

foo = 1 ^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1199
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
visit_match_last_line_node (node)

if /foo/ then end

^^^^^
visit_match_predicate_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1249
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
visit_match_required_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1259
def visit_match_required_node(node)
  builder.match_pattern(
    visit(node.value),
    token(node.operator_loc),
    within_pattern { |compiler| node.pattern.accept(compiler) }
  )
end
visit_match_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1269
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
visit_missing_node (node)

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.

# File lib/prism/translation/parser/compiler.rb, line 1280
def visit_missing_node(node)
  ::AST::Node.new(:missing, [], location: ::Parser::Source::Map.new(srange(node.location)))
end
visit_module_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1286
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
visit_multi_target_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1297
def visit_multi_target_node(node)
  builder.multi_lhs(
    token(node.lparen_loc),
    visit_all(multi_target_elements(node)),
    token(node.rparen_loc)
  )
end
visit_multi_write_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1307
def visit_multi_write_node(node)
  elements = multi_target_elements(node)

  if elements.length == 1 && elements.first.is_a?(MultiTargetNode)
    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
visit_next_node (node)

next ^^^^

next foo ^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1330
def visit_next_node(node)
  builder.keyword_cmd(
    :next,
    token(node.keyword_loc),
    nil,
    visit(node.arguments) || [],
    nil
  )
end
visit_nil_node (node)

nil ^^^

# File lib/prism/translation/parser/compiler.rb, line 1342
def visit_nil_node(node)
  builder.nil(token(node.location))
end
visit_no_keywords_parameter_node (node)

def foo(**nil); end

^^^^^
# File lib/prism/translation/parser/compiler.rb, line 1348
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
visit_numbered_parameters_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1358
def visit_numbered_parameters_node(node)
  builder.numargs(node.maximum)
end
visit_numbered_reference_read_node (node)

$1 ^^

# File lib/prism/translation/parser/compiler.rb, line 1364
def visit_numbered_reference_read_node(node)
  builder.nth_ref([node.number, srange(node.location)])
end
visit_optional_keyword_parameter_node (node)

def foo(bar: baz); end

^^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 1370
def visit_optional_keyword_parameter_node(node)
  builder.kwoptarg([node.name, srange(node.name_loc)], visit(node.value))
end
visit_optional_parameter_node (node)

def foo(bar = 1); end

^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 1376
def visit_optional_parameter_node(node)
  builder.optarg(token(node.name_loc), token(node.operator_loc), visit(node.value))
end
visit_or_node (node)

a or b ^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1382
def visit_or_node(node)
  builder.logical_op(:or, visit(node.left), token(node.operator_loc), visit(node.right))
end
visit_parameters_node (node)

def foo(bar, *baz); end

^^^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 1388
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
visit_parentheses_node (node)

() ^^

(1) ^^^

# File lib/prism/translation/parser/compiler.rb, line 1427
def visit_parentheses_node(node)
  builder.begin(
    token(node.opening_loc),
    visit(node.body),
    token(node.closing_loc)
  )
end
visit_pinned_expression_node (node)

foo => ^(bar)

^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 1437
def visit_pinned_expression_node(node)
  expression = builder.begin(token(node.lparen_loc), visit(node.expression), token(node.rparen_loc))
  builder.pin(token(node.operator_loc), expression)
end
visit_pinned_variable_node (node)

foo = 1 and bar => ^foo

^^^^
# File lib/prism/translation/parser/compiler.rb, line 1444
def visit_pinned_variable_node(node)
  builder.pin(token(node.operator_loc), visit(node.variable))
end
visit_post_execution_node (node)

END {}

# File lib/prism/translation/parser/compiler.rb, line 1449
def visit_post_execution_node(node)
  builder.postexe(
    token(node.keyword_loc),
    token(node.opening_loc),
    visit(node.statements),
    token(node.closing_loc)
  )
end
visit_pre_execution_node (node)

BEGIN {}

# File lib/prism/translation/parser/compiler.rb, line 1459
def visit_pre_execution_node(node)
  builder.preexe(
    token(node.keyword_loc),
    token(node.opening_loc),
    visit(node.statements),
    token(node.closing_loc)
  )
end
visit_program_node (node)

The top-level program node.

# File lib/prism/translation/parser/compiler.rb, line 1469
def visit_program_node(node)
  visit(node.statements)
end
visit_range_node (node)

0..5 ^^^^

# File lib/prism/translation/parser/compiler.rb, line 1475
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
Also aliased as: visit_flip_flop_node
visit_rational_node (node)

1r ^^

# File lib/prism/translation/parser/compiler.rb, line 1497
def visit_rational_node(node)
  visit_numeric(node, builder.rational([node.value, srange(node.location)]))
end
visit_redo_node (node)

redo ^^^^

# File lib/prism/translation/parser/compiler.rb, line 1503
def visit_redo_node(node)
  builder.keyword_cmd(:redo, token(node.location))
end
visit_regular_expression_node (node)

/foo/ ^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1509
def visit_regular_expression_node(node)
  content = node.content
  parts =
    if content.include?("\n")
      offset = node.content_loc.start_offset
      content.lines.map do |line|
        builder.string_internal([line, srange_offsets(offset, offset += line.bytesize)])
      end
    else
      [builder.string_internal(token(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
Also aliased as: visit_match_last_line_node
visit_required_keyword_parameter_node (node)

def foo(bar:); end

^^^^
# File lib/prism/translation/parser/compiler.rb, line 1535
def visit_required_keyword_parameter_node(node)
  builder.kwarg([node.name, srange(node.name_loc)])
end
visit_required_parameter_node (node)

def foo(bar); end

^^^
# File lib/prism/translation/parser/compiler.rb, line 1541
def visit_required_parameter_node(node)
  builder.arg(token(node.location))
end
visit_rescue_modifier_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1547
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
visit_rescue_node (node)

begin; rescue; end

^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 1565
def visit_rescue_node(node)
  raise CompilationError, "Cannot directly compile rescue nodes"
end
visit_rest_parameter_node (node)

def foo(*bar); end

^^^^

def foo(*); end

^
# File lib/prism/translation/parser/compiler.rb, line 1574
def visit_rest_parameter_node(node)
  builder.restarg(token(node.operator_loc), token(node.name_loc))
end
visit_retry_node (node)

retry ^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1580
def visit_retry_node(node)
  builder.keyword_cmd(:retry, token(node.location))
end
visit_return_node (node)

return ^^^^^^

return 1 ^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1589
def visit_return_node(node)
  builder.keyword_cmd(
    :return,
    token(node.keyword_loc),
    nil,
    visit(node.arguments) || [],
    nil
  )
end
visit_self_node (node)

self ^^^^

# File lib/prism/translation/parser/compiler.rb, line 1601
def visit_self_node(node)
  builder.self(token(node.location))
end
visit_shareable_constant_node (node)

A shareable constant.

# File lib/prism/translation/parser/compiler.rb, line 1606
def visit_shareable_constant_node(node)
  visit(node.write)
end
visit_singleton_class_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1612
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
visit_source_encoding_node (node)

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

# File lib/prism/translation/parser/compiler.rb, line 1624
def visit_source_encoding_node(node)
  builder.accessible(builder.__ENCODING__(token(node.location)))
end
visit_source_file_node (node)

__FILE__ ^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1630
def visit_source_file_node(node)
  builder.accessible(builder.__FILE__(token(node.location)))
end
visit_source_line_node (node)

__LINE__ ^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1636
def visit_source_line_node(node)
  builder.accessible(builder.__LINE__(token(node.location)))
end
visit_splat_node (node)

foo(*bar)

^^^^

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

^^^^

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

^
# File lib/prism/translation/parser/compiler.rb, line 1648
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
visit_statements_node (node)

A list of statements.

# File lib/prism/translation/parser/compiler.rb, line 1661
def visit_statements_node(node)
  builder.compstmt(visit_all(node.body))
end
visit_string_node (node)

“foo” ^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1667
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
    content_lines = node.content.lines
    unescaped_lines = node.unescaped.lines

    parts =
      if content_lines.length <= 1 || unescaped_lines.length <= 1
        [builder.string_internal([node.unescaped, srange(node.content_loc)])]
      elsif content_lines.length != unescaped_lines.length
        # This occurs when we have line continuations in the string. We
        # need to come back and fix this, but for now this stops the
        # code from breaking when we encounter it because of trying to
        # transpose arrays of different lengths.
        [builder.string_internal([node.unescaped, srange(node.content_loc)])]
      else
        start_offset = node.content_loc.start_offset

        [content_lines, unescaped_lines].transpose.map do |content_line, unescaped_line|
          end_offset = start_offset + content_line.length
          offsets = srange_offsets(start_offset, end_offset)
          start_offset = end_offset

          builder.string_internal([unescaped_line, offsets])
        end
      end

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

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

# File lib/prism/translation/parser/compiler.rb, line 1709
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
visit_symbol_node (node)

:foo ^^^^

# File lib/prism/translation/parser/compiler.rb, line 1732
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.lines.one?
      [builder.string_internal([node.unescaped, srange(node.value_loc)])]
    else
      start_offset = node.value_loc.start_offset

      node.value.lines.map do |line|
        end_offset = start_offset + line.length
        offsets = srange_offsets(start_offset, end_offset)
        start_offset = end_offset

        builder.string_internal([line, offsets])
      end
    end

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

true ^^^^

# File lib/prism/translation/parser/compiler.rb, line 1764
def visit_true_node(node)
  builder.true(token(node.location))
end
visit_undef_node (node)

undef foo ^^^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1770
def visit_undef_node(node)
  builder.undef_method(token(node.keyword_loc), visit_all(node.names))
end
visit_unless_node (node)

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

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

# File lib/prism/translation/parser/compiler.rb, line 1779
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 node.then_keyword_loc
        token(node.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
visit_until_node (node)

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

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

# File lib/prism/translation/parser/compiler.rb, line 1809
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),
      srange_find(node.predicate.location.end_offset, (node.statements&.location || node.closing_loc).start_offset, [";", "do"]),
      visit(node.statements),
      token(node.closing_loc)
    )
  else
    builder.loop_mod(
      :until,
      visit(node.statements),
      token(node.keyword_loc),
      visit(node.predicate)
    )
  end
end
visit_when_node (node)

case foo; when bar; end

^^^^^^^^^^^^^
# File lib/prism/translation/parser/compiler.rb, line 1831
def visit_when_node(node)
  builder.when(
    token(node.keyword_loc),
    visit_all(node.conditions),
    if node.then_keyword_loc
      token(node.then_keyword_loc)
    else
      srange_find(node.conditions.last.location.end_offset, node.statements&.location&.start_offset, [";"])
    end,
    visit(node.statements)
  )
end
visit_while_node (node)

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

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

# File lib/prism/translation/parser/compiler.rb, line 1849
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),
      srange_find(node.predicate.location.end_offset, (node.statements&.location || node.closing_loc).start_offset, [";", "do"]),
      visit(node.statements),
      token(node.closing_loc)
    )
  else
    builder.loop_mod(
      :while,
      visit(node.statements),
      token(node.keyword_loc),
      visit(node.predicate)
    )
  end
end
visit_x_string_node (node)

‘foo` ^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1871
def visit_x_string_node(node)
  if node.heredoc?
    visit_heredoc(node.to_interpolated) { |children, closing| builder.xstring_compose(token(node.opening_loc), children, closing) }
  else
    parts = if node.unescaped.lines.one?
      [builder.string_internal([node.unescaped, srange(node.content_loc)])]
    else
      start_offset = node.content_loc.start_offset

      node.unescaped.lines.map do |line|
        end_offset = start_offset + line.length
        offsets = srange_offsets(start_offset, end_offset)
        start_offset = end_offset

        builder.string_internal([line, offsets])
      end
    end

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

yield ^^^^^

yield 1 ^^^^^^^

# File lib/prism/translation/parser/compiler.rb, line 1902
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