class Parser::Builders::Default

Default AST builder. Uses {AST::Node}s.

Attributes

emit_lambda[RW]

AST compatibility attribute; since `-> {}` is not semantically equivalent to `lambda {}`, all new code should set this attribute to true.

If set to false (the default), `-> {}` is emitted as `s(:block, s(:send, nil, :lambda), s(:args), nil)`.

If set to true, `-> {}` is emitted as `s(:block, s(:lambda), s(:args), nil)`.

@return [Boolean]

emit_file_line_as_literals[RW]

If set to true, `__FILE__` and `__LINE__` are transformed to literal nodes. For example, `s(:str, “lib/foo.rb”)` and `s(:int, 10)`.

If set to false, `__FILE__` and `__LINE__` are emitted as-is, i.e. as `s(:__FILE__)` and `s(:__LINE__)` nodes.

Source maps are identical in both cases.

@return [Boolean]

parser[RW]

@api private

Public Class Methods

modernize() click to toggle source

@api private

# File lib/parser/builders/default.rb, line 28
def modernize
  @emit_lambda = true
end
new() click to toggle source

Initializes attributes:

* `emit_file_line_as_literals`: `true`
# File lib/parser/builders/default.rb, line 53
def initialize
  @emit_file_line_as_literals = true
end

Public Instance Methods

__ENCODING__(__ENCODING__t) click to toggle source
# File lib/parser/builders/default.rb, line 435
def __ENCODING__(__ENCODING__t)
  n0(:__ENCODING__,
    token_map(__ENCODING__t))
end
__FILE__(__FILE__t) click to toggle source
# File lib/parser/builders/default.rb, line 151
def __FILE__(__FILE__t)
  n0(:__FILE__,
    token_map(__FILE__t))
end
__LINE__(__LINE__t) click to toggle source
# File lib/parser/builders/default.rb, line 115
def __LINE__(__LINE__t)
  n0(:__LINE__,
    token_map(__LINE__t))
end
accessible(node) click to toggle source
# File lib/parser/builders/default.rb, line 380
def accessible(node)
  case node.type
  when :__FILE__
    if @emit_file_line_as_literals
      n(:str, [ node.loc.expression.source_buffer.name ],
        node.loc.dup)
    else
      node
    end

  when :__LINE__
    if @emit_file_line_as_literals
      n(:int, [ node.loc.expression.line ],
        node.loc.dup)
    else
      node
    end

  when :__ENCODING__
    n(:const, [ n(:const, [ nil, :Encoding], nil), :UTF_8 ],
      node.loc.dup)

  when :ident
    name, = *node

    if @parser.static_env.declared?(name)
      node.updated(:lvar)
    else
      name, = *node
      n(:send, [ nil, name ],
        var_send_map(node))
    end

  else
    node
  end
end
alias(alias_t, to, from) click to toggle source
# File lib/parser/builders/default.rb, line 573
def alias(alias_t, to, from)
  n(:alias, [ to, from ],
    keyword_map(alias_t, nil, [to, from], nil))
end
arg(name_t) click to toggle source
# File lib/parser/builders/default.rb, line 588
def arg(name_t)
  n(:arg, [ value(name_t).to_sym ],
    variable_map(name_t))
end
arg_expr(expr) click to toggle source

Ruby 1.8 block arguments

# File lib/parser/builders/default.rb, line 642
def arg_expr(expr)
  if expr.type == :lvasgn
    expr.updated(:arg)
  else
    n(:arg_expr, [ expr ],
      expr.loc.dup)
  end
end
args(begin_t, args, end_t, check_args=true) click to toggle source

Formal arguments

# File lib/parser/builders/default.rb, line 582
def args(begin_t, args, end_t, check_args=true)
  args = check_duplicate_args(args) if check_args
  n(:args, args,
    collection_map(begin_t, args, end_t))
end
array(begin_t, elements, end_t) click to toggle source

Arrays

# File lib/parser/builders/default.rb, line 238
def array(begin_t, elements, end_t)
  n(:array, elements,
    collection_map(begin_t, elements, end_t))
end
assign(lhs, eql_t, rhs) click to toggle source
# File lib/parser/builders/default.rb, line 481
def assign(lhs, eql_t, rhs)
  (lhs << rhs).updated(nil, nil,
    :location => lhs.loc.
      with_operator(loc(eql_t)).
      with_expression(join_exprs(lhs, rhs)))
end
assignable(node) click to toggle source

Assignment

# File lib/parser/builders/default.rb, line 444
def assignable(node)
  case node.type
  when :cvar
    node.updated(:cvasgn)

  when :ivar
    node.updated(:ivasgn)

  when :gvar
    node.updated(:gvasgn)

  when :const
    if @parser.in_def?
      diagnostic :error, :dynamic_const, nil, node.loc.expression
    end

    node.updated(:casgn)

  when :ident
    name, = *node
    @parser.static_env.declare(name)

    node.updated(:lvasgn)

  when :nil, :self, :true, :false,
       :__FILE__, :__LINE__, :__ENCODING__
    diagnostic :error, :invalid_assignment, nil, node.loc.expression

  when :back_ref, :nth_ref
    diagnostic :error, :backref_assignment, nil, node.loc.expression
  end
end
associate(begin_t, pairs, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 324
def associate(begin_t, pairs, end_t)
  n(:hash, [ *pairs ],
    collection_map(begin_t, pairs, end_t))
end
attr_asgn(receiver, dot_t, selector_t) click to toggle source
# File lib/parser/builders/default.rb, line 784
def attr_asgn(receiver, dot_t, selector_t)
  method_name = (value(selector_t) + '=').to_sym
  type = call_type_for_dot(dot_t)

  # Incomplete method call.
  n(type, [ receiver, method_name ],
    send_map(receiver, dot_t, selector_t))
end
back_ref(token) click to toggle source
# File lib/parser/builders/default.rb, line 370
def back_ref(token)
  n(:back_ref, [ value(token).to_sym ],
    token_map(token))
end
begin(begin_t, body, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 1028
def begin(begin_t, body, end_t)
  if body.nil?
    # A nil expression: `()'.
    n0(:begin,
      collection_map(begin_t, nil, end_t))
  elsif body.type == :mlhs  ||
       (body.type == :begin &&
        body.loc.begin.nil? && body.loc.end.nil?)
    # Synthesized (begin) from compstmt "a; b" or (mlhs)
    # from multi_lhs "(a, b) = *foo".
    n(body.type, body.children,
      collection_map(begin_t, body.children, end_t))
  else
    n(:begin, [ body ],
      collection_map(begin_t, [ body ], end_t))
  end
end
begin_body(compound_stmt, rescue_bodies=[], else_t=nil, else_=nil, ensure_t=nil, ensure_=nil) click to toggle source
# File lib/parser/builders/default.rb, line 972
def begin_body(compound_stmt, rescue_bodies=[],
               else_t=nil,    else_=nil,
               ensure_t=nil,  ensure_=nil)
  if rescue_bodies.any?
    if else_t
      compound_stmt =
        n(:rescue,
          [ compound_stmt, *(rescue_bodies + [ else_ ]) ],
          eh_keyword_map(compound_stmt, nil, rescue_bodies, else_t, else_))
    else
      compound_stmt =
        n(:rescue,
          [ compound_stmt, *(rescue_bodies + [ nil ]) ],
          eh_keyword_map(compound_stmt, nil, rescue_bodies, nil, nil))
    end
  elsif else_t
    statements = []
    if compound_stmt.type == :begin
      statements += compound_stmt.children
    else
      statements.push(compound_stmt)
    end
    statements.push(
      n(:begin, [ else_ ],
        collection_map(else_t, [ else_ ], nil)))
    compound_stmt =
      n(:begin, statements,
        collection_map(nil, statements, nil))
  end

  if ensure_t
    compound_stmt =
      n(:ensure,
        [ compound_stmt, ensure_ ],
        eh_keyword_map(compound_stmt, ensure_t, [ ensure_ ], nil, nil))
  end

  compound_stmt
end
begin_keyword(begin_t, body, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 1046
def begin_keyword(begin_t, body, end_t)
  if body.nil?
    # A nil expression: `begin end'.
    n0(:kwbegin,
      collection_map(begin_t, nil, end_t))
  elsif (body.type == :begin &&
         body.loc.begin.nil? && body.loc.end.nil?)
    # Synthesized (begin) from compstmt "a; b".
    n(:kwbegin, body.children,
      collection_map(begin_t, body.children, end_t))
  else
    n(:kwbegin, [ body ],
      collection_map(begin_t, [ body ], end_t))
  end
end
binary_op(receiver, operator_t, arg) click to toggle source
# File lib/parser/builders/default.rb, line 804
def binary_op(receiver, operator_t, arg)
  source_map = send_binary_op_map(receiver, operator_t, arg)

  if @parser.version == 18
    operator = value(operator_t)

    if operator == '!='
      method_call = n(:send, [ receiver, :==, arg ], source_map)
    elsif operator == '!~'
      method_call = n(:send, [ receiver, :=~, arg ], source_map)
    end

    if %w(!= !~).include?(operator)
      return n(:not, [ method_call ],
               expr_map(source_map.expression))
    end
  end

  n(:send, [ receiver, value(operator_t).to_sym, arg ],
    source_map)
end
block(method_call, begin_t, args, body, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 742
def block(method_call, begin_t, args, body, end_t)
  _receiver, _selector, *call_args = *method_call

  if method_call.type == :yield
    diagnostic :error, :block_given_to_yield, nil, method_call.loc.keyword, [loc(begin_t)]
  end

  last_arg = call_args.last
  if last_arg && last_arg.type == :block_pass
    diagnostic :error, :block_and_blockarg, nil, last_arg.loc.expression, [loc(begin_t)]
  end

  if [:send, :csend, :psend, :super, :zsuper, :lambda].include?(method_call.type)
    n(:block, [ method_call, args, body ],
      block_map(method_call.loc.expression, begin_t, end_t))
  else
    # Code like "return foo 1 do end" is reduced in a weird sequence.
    # Here, method_call is actually (return).
    actual_send, = *method_call
    block =
      n(:block, [ actual_send, args, body ],
        block_map(actual_send.loc.expression, begin_t, end_t))

    n(method_call.type, [ block ],
      method_call.loc.with_expression(join_exprs(method_call, block)))
  end
end
block_pass(amper_t, arg) click to toggle source
# File lib/parser/builders/default.rb, line 770
def block_pass(amper_t, arg)
  n(:block_pass, [ arg ],
    unary_op_map(amper_t, arg))
end
blockarg(amper_t, name_t) click to toggle source
# File lib/parser/builders/default.rb, line 635
def blockarg(amper_t, name_t)
  n(:blockarg, [ value(name_t).to_sym ],
    arg_prefix_map(amper_t, name_t))
end
blockarg_expr(amper_t, expr) click to toggle source
# File lib/parser/builders/default.rb, line 662
def blockarg_expr(amper_t, expr)
  if expr.type == :lvasgn
    expr.updated(:blockarg)
  else
    n(:blockarg_expr, [ expr ],
      expr.loc.dup)
  end
end
call_lambda(lambda_t) click to toggle source
# File lib/parser/builders/default.rb, line 733
def call_lambda(lambda_t)
  if self.class.emit_lambda
    n0(:lambda, expr_map(loc(lambda_t)))
  else
    n(:send, [ nil, :lambda ],
      send_map(nil, nil, lambda_t))
  end
end
call_method(receiver, dot_t, selector_t, lparen_t=nil, args=[], rparen_t=nil) click to toggle source
# File lib/parser/builders/default.rb, line 721
def call_method(receiver, dot_t, selector_t,
                lparen_t=nil, args=[], rparen_t=nil)
  type = call_type_for_dot(dot_t)
  if selector_t.nil?
    n(type, [ receiver, :call, *args ],
      send_map(receiver, dot_t, nil, lparen_t, args, rparen_t))
  else
    n(type, [ receiver, value(selector_t).to_sym, *args ],
      send_map(receiver, dot_t, selector_t, lparen_t, args, rparen_t))
  end
end
call_type_for_dot(dot_t) click to toggle source

Method calls

# File lib/parser/builders/default.rb, line 703
def call_type_for_dot(dot_t)
  if !dot_t.nil? && value(dot_t) == :anddot
    :csend
  elsif !dot_t.nil? && value(dot_t) == :pipedot
    :psend
  else
    # This case is a bit tricky. ruby23.y returns the token tDOT with
    # the value :dot, and the token :tANDDOT with the value :anddot.
    #
    # But, ruby{18..22}.y (which unconditionally expect tDOT) just
    # return "." there, since they are to be kept close to the corresponding
    # Ruby MRI grammars.
    #
    # Thankfully, we don't have to care.
    :send
  end
end
case(case_t, expr, when_bodies, else_t, else_body, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 909
def case(case_t, expr, when_bodies, else_t, else_body, end_t)
  n(:case, [ expr, *(when_bodies << else_body)],
    condition_map(case_t, expr, nil, nil, else_t, else_body, end_t))
end
character(char_t) click to toggle source
# File lib/parser/builders/default.rb, line 146
def character(char_t)
  n(:str, [ string_value(char_t) ],
    prefix_string_map(char_t))
end
complex(complex_t) click to toggle source
# File lib/parser/builders/default.rb, line 94
def complex(complex_t)
  numeric(:complex, complex_t)
end
compstmt(statements) click to toggle source

Expression grouping

# File lib/parser/builders/default.rb, line 1016
def compstmt(statements)
  case
  when statements.none?
    nil
  when statements.one?
    statements.first
  else
    n(:begin, statements,
      collection_map(nil, statements, nil))
  end
end
condition(cond_t, cond, then_t, if_true, else_t, if_false, end_t) click to toggle source

Conditionals

# File lib/parser/builders/default.rb, line 885
def condition(cond_t, cond, then_t,
              if_true, else_t, if_false, end_t)
  n(:if, [ check_condition(cond), if_true, if_false ],
    condition_map(cond_t, cond, then_t, if_true, else_t, if_false, end_t))
end
condition_mod(if_true, if_false, cond_t, cond) click to toggle source
# File lib/parser/builders/default.rb, line 891
def condition_mod(if_true, if_false, cond_t, cond)
  n(:if, [ check_condition(cond), if_true, if_false ],
    keyword_mod_map(if_true || if_false, cond_t, cond))
end
const(name_t) click to toggle source
# File lib/parser/builders/default.rb, line 418
def const(name_t)
  n(:const, [ nil, value(name_t).to_sym ],
    constant_map(nil, nil, name_t))
end
const_fetch(scope, t_colon2, name_t) click to toggle source
# File lib/parser/builders/default.rb, line 430
def const_fetch(scope, t_colon2, name_t)
  n(:const, [ scope, value(name_t).to_sym ],
    constant_map(scope, t_colon2, name_t))
end
const_global(t_colon3, name_t) click to toggle source
# File lib/parser/builders/default.rb, line 423
def const_global(t_colon3, name_t)
  cbase = n0(:cbase, token_map(t_colon3))

  n(:const, [ cbase, value(name_t).to_sym ],
    constant_map(cbase, t_colon3, name_t))
end
const_op_assignable(node) click to toggle source
# File lib/parser/builders/default.rb, line 477
def const_op_assignable(node)
  node.updated(:casgn)
end
cvar(token) click to toggle source
# File lib/parser/builders/default.rb, line 365
def cvar(token)
  n(:cvar, [ value(token).to_sym ],
    variable_map(token))
end
dedent_string(node, dedent_level) click to toggle source

Indented (interpolated, noninterpolated, executable) strings

# File lib/parser/builders/default.rb, line 191
def dedent_string(node, dedent_level)
  if !dedent_level.nil?
    dedenter = Lexer::Dedenter.new(dedent_level)

    if node.type == :str
      str = node.children.first
      dedenter.dedent(str)
    elsif node.type == :dstr || node.type == :xstr
      node.children.each do |str_node|
        if str_node.type == :str
          str = str_node.children.first
          dedenter.dedent(str)
        else
          dedenter.interrupt
        end
      end
    end
  end

  node
end
def_class(class_t, name, lt_t, superclass, body, end_t) click to toggle source

Class and module definition

# File lib/parser/builders/default.rb, line 524
def def_class(class_t, name,
              lt_t, superclass,
              body, end_t)
  n(:class, [ name, superclass, body ],
    module_definition_map(class_t, name, lt_t, end_t))
end
def_method(def_t, name_t, args, body, end_t) click to toggle source

Method (un)definition

# File lib/parser/builders/default.rb, line 547
def def_method(def_t, name_t, args,
               body, end_t)
  n(:def, [ value(name_t).to_sym, args, body ],
    definition_map(def_t, nil, name_t, end_t))
end
def_module(module_t, name, body, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 537
def def_module(module_t, name,
               body, end_t)
  n(:module, [ name, body ],
    module_definition_map(module_t, name, nil, end_t))
end
def_sclass(class_t, lshft_t, expr, body, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 531
def def_sclass(class_t, lshft_t, expr,
               body, end_t)
  n(:sclass, [ expr, body ],
    module_definition_map(class_t, nil, lshft_t, end_t))
end
def_singleton(def_t, definee, dot_t, name_t, args, body, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 553
def def_singleton(def_t, definee, dot_t,
                  name_t, args,
                  body, end_t)
  case definee.type
  when :int, :str, :dstr, :sym, :dsym,
       :regexp, :array, :hash

    diagnostic :error, :singleton_literal, nil, definee.loc.expression

  else
    n(:defs, [ definee, value(name_t).to_sym, args, body ],
      definition_map(def_t, dot_t, name_t, end_t))
  end
end
false(false_t) click to toggle source
# File lib/parser/builders/default.rb, line 75
def false(false_t)
  n0(:false,
    token_map(false_t))
end
float(float_t) click to toggle source
# File lib/parser/builders/default.rb, line 86
def float(float_t)
  numeric(:float, float_t)
end
for(for_t, iterator, in_t, iteratee, do_t, body, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 930
def for(for_t, iterator, in_t, iteratee,
        do_t, body, end_t)
  n(:for, [ iterator, iteratee, body ],
    for_map(for_t, in_t, do_t, end_t))
end
gvar(token) click to toggle source
# File lib/parser/builders/default.rb, line 360
def gvar(token)
  n(:gvar, [ value(token).to_sym ],
    variable_map(token))
end
ident(token) click to toggle source
# File lib/parser/builders/default.rb, line 350
def ident(token)
  n(:ident, [ value(token).to_sym ],
    variable_map(token))
end
index(receiver, lbrack_t, indexes, rbrack_t) click to toggle source
# File lib/parser/builders/default.rb, line 793
def index(receiver, lbrack_t, indexes, rbrack_t)
  n(:send, [ receiver, :[], *indexes ],
    send_index_map(receiver, lbrack_t, rbrack_t))
end
index_asgn(receiver, lbrack_t, indexes, rbrack_t) click to toggle source
# File lib/parser/builders/default.rb, line 798
def index_asgn(receiver, lbrack_t, indexes, rbrack_t)
  # Incomplete method call.
  n(:send, [ receiver, :[]=, *indexes ],
    send_index_map(receiver, lbrack_t, rbrack_t))
end
integer(integer_t) click to toggle source

Numerics

# File lib/parser/builders/default.rb, line 82
def integer(integer_t)
  numeric(:int, integer_t)
end
ivar(token) click to toggle source
# File lib/parser/builders/default.rb, line 355
def ivar(token)
  n(:ivar, [ value(token).to_sym ],
    variable_map(token))
end
keyword_cmd(type, keyword_t, lparen_t=nil, args=[], rparen_t=nil) click to toggle source

Keywords

# File lib/parser/builders/default.rb, line 938
def keyword_cmd(type, keyword_t, lparen_t=nil, args=[], rparen_t=nil)
  if type == :yield && args.count > 0
    last_arg = args.last
    if last_arg.type == :block_pass
      diagnostic :error, :block_given_to_yield, nil, loc(keyword_t), [last_arg.loc.expression]
    end
  end

  n(type, args,
    keyword_map(keyword_t, lparen_t, args, rparen_t))
end
kwarg(name_t) click to toggle source
# File lib/parser/builders/default.rb, line 610
def kwarg(name_t)
  n(:kwarg, [ value(name_t).to_sym ],
    kwarg_map(name_t))
end
kwoptarg(name_t, value) click to toggle source
# File lib/parser/builders/default.rb, line 615
def kwoptarg(name_t, value)
  n(:kwoptarg, [ value(name_t).to_sym, value ],
    kwarg_map(name_t, value))
end
kwrestarg(dstar_t, name_t=nil) click to toggle source
# File lib/parser/builders/default.rb, line 620
def kwrestarg(dstar_t, name_t=nil)
  if name_t
    n(:kwrestarg, [ value(name_t).to_sym ],
      arg_prefix_map(dstar_t, name_t))
  else
    n0(:kwrestarg,
      arg_prefix_map(dstar_t))
  end
end
kwsplat(dstar_t, arg) click to toggle source
# File lib/parser/builders/default.rb, line 319
def kwsplat(dstar_t, arg)
  n(:kwsplat, [ arg ],
    unary_op_map(dstar_t, arg))
end
logical_op(type, lhs, op_t, rhs) click to toggle source

Logical operations: and, or

# File lib/parser/builders/default.rb, line 878
def logical_op(type, lhs, op_t, rhs)
  n(type, [ lhs, rhs ],
    binary_op_map(lhs, op_t, rhs))
end
loop(type, keyword_t, cond, do_t, body, end_t) click to toggle source

Loops

# File lib/parser/builders/default.rb, line 916
def loop(type, keyword_t, cond, do_t, body, end_t)
  n(type, [ check_condition(cond), body ],
    keyword_map(keyword_t, do_t, nil, end_t))
end
loop_mod(type, body, keyword_t, cond) click to toggle source
# File lib/parser/builders/default.rb, line 921
def loop_mod(type, body, keyword_t, cond)
  if body.type == :kwbegin
    type = :"#{type}_post"
  end

  n(type, [ check_condition(cond), body ],
    keyword_mod_map(body, keyword_t, cond))
end
match_op(receiver, match_t, arg) click to toggle source
# File lib/parser/builders/default.rb, line 826
def match_op(receiver, match_t, arg)
  source_map = send_binary_op_map(receiver, match_t, arg)

  if (regexp = static_regexp_node(receiver))
    regexp.names.each do |name|
      @parser.static_env.declare(name)
    end

    n(:match_with_lvasgn, [ receiver, arg ],
      source_map)
  else
    n(:send, [ receiver, :=~, arg ],
      source_map)
  end
end
multi_assign(lhs, eql_t, rhs) click to toggle source
# File lib/parser/builders/default.rb, line 515
def multi_assign(lhs, eql_t, rhs)
  n(:masgn, [ lhs, rhs ],
    binary_op_map(lhs, eql_t, rhs))
end
multi_lhs(begin_t, items, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 510
def multi_lhs(begin_t, items, end_t)
  n(:mlhs, [ *items ],
    collection_map(begin_t, items, end_t))
end
negate(uminus_t, numeric) click to toggle source
# File lib/parser/builders/default.rb, line 104
def negate(uminus_t, numeric)
  value, = *numeric
  operator_loc = loc(uminus_t)

  numeric.updated(nil, [ -value ],
    :location =>
      Source::Map::Operator.new(
        operator_loc,
        operator_loc.join(numeric.loc.expression)))
end
nil(nil_t) click to toggle source

Singletons

# File lib/parser/builders/default.rb, line 65
def nil(nil_t)
  n0(:nil,
    token_map(nil_t))
end
not_op(not_t, begin_t=nil, receiver=nil, end_t=nil) click to toggle source
# File lib/parser/builders/default.rb, line 854
def not_op(not_t, begin_t=nil, receiver=nil, end_t=nil)
  if @parser.version == 18
    n(:not, [ receiver ],
      unary_op_map(not_t, receiver))
  else
    if receiver.nil?
      nil_node = n0(:begin, collection_map(begin_t, nil, end_t))

      n(:send, [
        nil_node, :'!'
      ], send_unary_op_map(not_t, nil_node))
    else
      n(:send, [ receiver, :'!' ],
        send_map(nil, nil, not_t, begin_t, [receiver], end_t))
    end
  end
end
nth_ref(token) click to toggle source
# File lib/parser/builders/default.rb, line 375
def nth_ref(token)
  n(:nth_ref, [ value(token) ],
    token_map(token))
end
objc_kwarg(kwname_t, assoc_t, name_t) click to toggle source

MacRuby Objective-C arguments

# File lib/parser/builders/default.rb, line 673
def objc_kwarg(kwname_t, assoc_t, name_t)
  kwname_l = loc(kwname_t)
  if assoc_t.nil? # a: b, not a => b
    kwname_l   = kwname_l.resize(kwname_l.size - 1)
    operator_l = kwname_l.end.resize(1)
  else
    operator_l = loc(assoc_t)
  end

  n(:objc_kwarg, [ value(kwname_t).to_sym, value(name_t).to_sym ],
    Source::Map::ObjcKwarg.new(kwname_l, operator_l, loc(name_t),
                               kwname_l.join(loc(name_t))))
end
objc_restarg(star_t, name=nil) click to toggle source
# File lib/parser/builders/default.rb, line 687
def objc_restarg(star_t, name=nil)
  if name.nil?
    n0(:restarg, arg_prefix_map(star_t))
  elsif name.type == :arg # regular restarg
    name.updated(:restarg, nil,
      { :location => name.loc.with_operator(loc(star_t)) })
  else # restarg with objc_kwarg inside
    n(:objc_restarg, [ name ],
      unary_op_map(star_t, name))
  end
end
objc_varargs(pair, rest_of_varargs) click to toggle source
# File lib/parser/builders/default.rb, line 775
def objc_varargs(pair, rest_of_varargs)
  value, first_vararg = *pair
  vararg_array = array(nil, [ first_vararg, *rest_of_varargs ], nil).
    updated(:objc_varargs)
  pair.updated(nil, [ value, vararg_array ],
    { :location => pair.loc.with_expression(
          pair.loc.expression.join(vararg_array.loc.expression)) })
end
op_assign(lhs, op_t, rhs) click to toggle source
# File lib/parser/builders/default.rb, line 488
def op_assign(lhs, op_t, rhs)
  case lhs.type
  when :gvasgn, :ivasgn, :lvasgn, :cvasgn, :casgn, :send, :csend, :psend
    operator   = value(op_t)[0..-1].to_sym
    source_map = lhs.loc.
                    with_operator(loc(op_t)).
                    with_expression(join_exprs(lhs, rhs))

    case operator
    when :'&&'
      n(:and_asgn, [ lhs, rhs ], source_map)
    when :'||'
      n(:or_asgn, [ lhs, rhs ], source_map)
    else
      n(:op_asgn, [ lhs, operator, rhs ], source_map)
    end

  when :back_ref, :nth_ref
    diagnostic :error, :backref_assignment, nil, lhs.loc.expression
  end
end
optarg(name_t, eql_t, value) click to toggle source
# File lib/parser/builders/default.rb, line 593
def optarg(name_t, eql_t, value)
  n(:optarg, [ value(name_t).to_sym, value ],
    variable_map(name_t).
      with_operator(loc(eql_t)).
      with_expression(loc(name_t).join(value.loc.expression)))
end
pair(key, assoc_t, value) click to toggle source

Hashes

# File lib/parser/builders/default.rb, line 286
def pair(key, assoc_t, value)
  n(:pair, [ key, value ],
    binary_op_map(key, assoc_t, value))
end
pair_keyword(key_t, value) click to toggle source
# File lib/parser/builders/default.rb, line 303
def pair_keyword(key_t, value)
  key_map, pair_map = pair_keyword_map(key_t, value)

  key = n(:sym, [ value(key_t).to_sym ], key_map)

  n(:pair, [ key, value ], pair_map)
end
pair_list_18(list) click to toggle source
# File lib/parser/builders/default.rb, line 291
def pair_list_18(list)
  if list.size % 2 != 0
    diagnostic :error, :odd_hash, nil, list.last.loc.expression
  else
    list.
      each_slice(2).map do |key, value|
        n(:pair, [ key, value ],
          binary_op_map(key, nil, value))
      end
  end
end
pair_quoted(begin_t, parts, end_t, value) click to toggle source
# File lib/parser/builders/default.rb, line 311
def pair_quoted(begin_t, parts, end_t, value)
  end_t, pair_map = pair_quoted_map(begin_t, end_t, value)

  key = symbol_compose(begin_t, parts, end_t)

  n(:pair, [ key, value ], pair_map)
end
postexe(postexe_t, lbrace_t, compstmt, rbrace_t) click to toggle source
# File lib/parser/builders/default.rb, line 957
def postexe(postexe_t, lbrace_t, compstmt, rbrace_t)
  n(:postexe, [ compstmt ],
    keyword_map(postexe_t, lbrace_t, [], rbrace_t))
end
preexe(preexe_t, lbrace_t, compstmt, rbrace_t) click to toggle source

BEGIN, END

# File lib/parser/builders/default.rb, line 952
def preexe(preexe_t, lbrace_t, compstmt, rbrace_t)
  n(:preexe, [ compstmt ],
    keyword_map(preexe_t, lbrace_t, [], rbrace_t))
end
range_exclusive(lhs, dot3_t, rhs) click to toggle source
# File lib/parser/builders/default.rb, line 336
def range_exclusive(lhs, dot3_t, rhs)
  n(:erange, [ lhs, rhs ],
    binary_op_map(lhs, dot3_t, rhs))
end
range_inclusive(lhs, dot2_t, rhs) click to toggle source

Ranges

# File lib/parser/builders/default.rb, line 331
def range_inclusive(lhs, dot2_t, rhs)
  n(:irange, [ lhs, rhs ],
    binary_op_map(lhs, dot2_t, rhs))
end
rational(rational_t) click to toggle source
# File lib/parser/builders/default.rb, line 90
def rational(rational_t)
  numeric(:rational, rational_t)
end
regexp_compose(begin_t, parts, end_t, options) click to toggle source
# File lib/parser/builders/default.rb, line 224
def regexp_compose(begin_t, parts, end_t, options)
  begin
    static_regexp(parts, options)
  rescue RegexpError => e
    diagnostic :error, :invalid_regexp, { :message => e.message },
               loc(begin_t).join(loc(end_t))
  end

  n(:regexp, (parts << options),
    regexp_map(begin_t, end_t, options))
end
regexp_options(regopt_t) click to toggle source

Regular expressions

# File lib/parser/builders/default.rb, line 215
def regexp_options(regopt_t)
  options = value(regopt_t).
    each_char.sort.uniq.
    map(&:to_sym)

  n(:regopt, options,
    token_map(regopt_t))
end
rescue_body(rescue_t, exc_list, assoc_t, exc_var, then_t, compound_stmt) click to toggle source

Exception handling

# File lib/parser/builders/default.rb, line 964
def rescue_body(rescue_t,
                exc_list, assoc_t, exc_var,
                then_t, compound_stmt)
  n(:resbody, [ exc_list, exc_var, compound_stmt ],
    rescue_body_map(rescue_t, exc_list, assoc_t,
                    exc_var, then_t, compound_stmt))
end
restarg(star_t, name_t=nil) click to toggle source
# File lib/parser/builders/default.rb, line 600
def restarg(star_t, name_t=nil)
  if name_t
    n(:restarg, [ value(name_t).to_sym ],
      arg_prefix_map(star_t, name_t))
  else
    n0(:restarg,
      arg_prefix_map(star_t))
  end
end
restarg_expr(star_t, expr=nil) click to toggle source
# File lib/parser/builders/default.rb, line 651
def restarg_expr(star_t, expr=nil)
  if expr.nil?
    n0(:restarg, token_map(star_t))
  elsif expr.type == :lvasgn
    expr.updated(:restarg)
  else
    n(:restarg_expr, [ expr ],
      expr.loc.dup)
  end
end
self(token) click to toggle source

Access

# File lib/parser/builders/default.rb, line 345
def self(token)
  n0(:self,
    token_map(token))
end
shadowarg(name_t) click to toggle source
# File lib/parser/builders/default.rb, line 630
def shadowarg(name_t)
  n(:shadowarg, [ value(name_t).to_sym ],
    variable_map(name_t))
end
splat(star_t, arg=nil) click to toggle source
# File lib/parser/builders/default.rb, line 243
def splat(star_t, arg=nil)
  if arg.nil?
    n0(:splat,
      unary_op_map(star_t))
  else
    n(:splat, [ arg ],
      unary_op_map(star_t, arg))
  end
end
string(string_t) click to toggle source

Strings

# File lib/parser/builders/default.rb, line 122
def string(string_t)
  n(:str, [ string_value(string_t) ],
    delimited_string_map(string_t))
end
string_compose(begin_t, parts, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 132
def string_compose(begin_t, parts, end_t)
  if collapse_string_parts?(parts)
    if begin_t.nil? && end_t.nil?
      parts.first
    else
      n(:str, parts.first.children,
        string_map(begin_t, parts, end_t))
    end
  else
    n(:dstr, [ *parts ],
      string_map(begin_t, parts, end_t))
  end
end
string_internal(string_t) click to toggle source
# File lib/parser/builders/default.rb, line 127
def string_internal(string_t)
  n(:str, [ string_value(string_t) ],
    unquoted_map(string_t))
end
symbol(symbol_t) click to toggle source

Symbols

# File lib/parser/builders/default.rb, line 158
def symbol(symbol_t)
  n(:sym, [ string_value(symbol_t).to_sym ],
    prefix_string_map(symbol_t))
end
symbol_compose(begin_t, parts, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 168
def symbol_compose(begin_t, parts, end_t)
  if collapse_string_parts?(parts)
    str = parts.first

    n(:sym, [ str.children.first.to_sym ],
      collection_map(begin_t, str.loc.expression, end_t))
  elsif @parser.version == 18 && parts.empty?
    diagnostic :error, :empty_symbol, nil, loc(begin_t).join(loc(end_t))
  else
    n(:dsym, [ *parts ],
      collection_map(begin_t, parts, end_t))
  end
end
symbol_internal(symbol_t) click to toggle source
# File lib/parser/builders/default.rb, line 163
def symbol_internal(symbol_t)
  n(:sym, [ string_value(symbol_t).to_sym ],
    unquoted_map(symbol_t))
end
symbols_compose(begin_t, parts, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 267
def symbols_compose(begin_t, parts, end_t)
  parts = parts.map do |part|
    case part.type
    when :str
      value, = *part
      part.updated(:sym, [ value.to_sym ])
    when :dstr
      part.updated(:dsym)
    else
      part
    end
  end

  n(:array, [ *parts ],
    collection_map(begin_t, parts, end_t))
end
ternary(cond, question_t, if_true, colon_t, if_false) click to toggle source
# File lib/parser/builders/default.rb, line 896
def ternary(cond, question_t, if_true, colon_t, if_false)
  n(:if, [ check_condition(cond), if_true, if_false ],
    ternary_map(cond, question_t, if_true, colon_t, if_false))
end
true(true_t) click to toggle source
# File lib/parser/builders/default.rb, line 70
def true(true_t)
  n0(:true,
    token_map(true_t))
end
unary_op(op_t, receiver) click to toggle source
# File lib/parser/builders/default.rb, line 842
def unary_op(op_t, receiver)
  case value(op_t)
  when '+', '-'
    method = value(op_t) + '@'
  else
    method = value(op_t)
  end

  n(:send, [ receiver, method.to_sym ],
    send_unary_op_map(op_t, receiver))
end
undef_method(undef_t, names) click to toggle source
# File lib/parser/builders/default.rb, line 568
def undef_method(undef_t, names)
  n(:undef, [ *names ],
    keyword_map(undef_t, nil, names, nil))
end
when(when_t, patterns, then_t, body) click to toggle source

Case matching

# File lib/parser/builders/default.rb, line 903
def when(when_t, patterns, then_t, body)
  children = patterns << body
  n(:when, children,
    keyword_map(when_t, then_t, children, nil))
end
word(parts) click to toggle source
# File lib/parser/builders/default.rb, line 253
def word(parts)
  if collapse_string_parts?(parts)
    parts.first
  else
    n(:dstr, [ *parts ],
      collection_map(nil, parts, nil))
  end
end
words_compose(begin_t, parts, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 262
def words_compose(begin_t, parts, end_t)
  n(:array, [ *parts ],
    collection_map(begin_t, parts, end_t))
end
xstring_compose(begin_t, parts, end_t) click to toggle source

Executable strings

# File lib/parser/builders/default.rb, line 184
def xstring_compose(begin_t, parts, end_t)
  n(:xstr, [ *parts ],
    string_map(begin_t, parts, end_t))
end

Private Instance Methods

arg_name_collides?(this_name, that_name) click to toggle source
# File lib/parser/builders/default.rb, line 1135
def arg_name_collides?(this_name, that_name)
  case @parser.version
  when 18
    this_name == that_name
  when 19
    # Ignore underscore.
    this_name != :_ &&
      this_name == that_name
  else
    # Ignore everything beginning with underscore.
    this_name && this_name[0] != '_' &&
      this_name == that_name
  end
end
arg_prefix_map(op_t, name_t=nil) click to toggle source
# File lib/parser/builders/default.rb, line 1302
def arg_prefix_map(op_t, name_t=nil)
  if name_t.nil?
    expr_l = loc(op_t)
  else
    expr_l = loc(op_t).join(loc(name_t))
  end

  Source::Map::Variable.new(loc(name_t), expr_l)
end
binary_op_map(left_e, op_t, right_e) click to toggle source
# File lib/parser/builders/default.rb, line 1288
def binary_op_map(left_e, op_t, right_e)
  Source::Map::Operator.new(loc(op_t), join_exprs(left_e, right_e))
end
block_map(receiver_l, begin_t, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 1393
def block_map(receiver_l, begin_t, end_t)
  Source::Map::Collection.new(loc(begin_t), loc(end_t),
                              receiver_l.join(loc(end_t)))
end
check_condition(cond) click to toggle source

VERIFICATION

# File lib/parser/builders/default.rb, line 1068
def check_condition(cond)
  case cond.type
  when :masgn
    if @parser.version <= 23
      diagnostic :error, :masgn_as_condition, nil, cond.loc.expression
    end

  when :begin
    if cond.children.count == 1
      cond.updated(nil, [
        check_condition(cond.children.last)
      ])
    else
      cond
    end

  when :and, :or, :irange, :erange
    lhs, rhs = *cond

    type = case cond.type
    when :irange then :iflipflop
    when :erange then :eflipflop
    end

    if [:and, :or].include?(cond.type) &&
           @parser.version == 18
      cond
    else
      cond.updated(type, [
        check_condition(lhs),
        check_condition(rhs)
      ])
    end

  when :regexp
    n(:match_current_line, [ cond ], expr_map(cond.loc.expression))

  else
    cond
  end
end
check_duplicate_args(args, map={}) click to toggle source
# File lib/parser/builders/default.rb, line 1110
def check_duplicate_args(args, map={})
  args.each do |this_arg|
    case this_arg.type
    when :arg, :optarg, :restarg, :blockarg,
         :kwarg, :kwoptarg, :kwrestarg,
         :shadowarg

      this_name, = *this_arg

      that_arg   = map[this_name]
      that_name, = *that_arg

      if that_arg.nil?
        map[this_name] = this_arg
      elsif arg_name_collides?(this_name, that_name)
        diagnostic :error, :duplicate_argument, nil,
                   this_arg.loc.name, [ that_arg.loc.name ]
      end

    when :mlhs
      check_duplicate_args(this_arg.children, map)
    end
  end
end
collapse_string_parts?(parts) click to toggle source
# File lib/parser/builders/default.rb, line 1545
def collapse_string_parts?(parts)
  parts.one? &&
      [:str, :dstr].include?(parts.first.type)
end
collection_map(begin_t, parts, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 1243
def collection_map(begin_t, parts, end_t)
  if begin_t.nil? || end_t.nil?
    if parts.any?
      expr_l = join_exprs(parts.first, parts.last)
    end
  else
    expr_l = loc(begin_t).join(loc(end_t))
  end

  Source::Map::Collection.new(loc(begin_t), loc(end_t), expr_l)
end
condition_map(keyword_t, cond_e, begin_t, body_e, else_t, else_e, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 1420
def condition_map(keyword_t, cond_e, begin_t, body_e, else_t, else_e, end_t)
  if end_t
    end_l = loc(end_t)
  elsif else_e && else_e.loc.expression
    end_l = else_e.loc.expression
  elsif loc(else_t)
    end_l = loc(else_t)
  elsif body_e && body_e.loc.expression
    end_l = body_e.loc.expression
  elsif loc(begin_t)
    end_l = loc(begin_t)
  else
    end_l = cond_e.loc.expression
  end

  Source::Map::Condition.new(loc(keyword_t),
                             loc(begin_t), loc(else_t), loc(end_t),
                             loc(keyword_t).join(end_l))
end
constant_map(scope, colon2_t, name_t) click to toggle source
# File lib/parser/builders/default.rb, line 1274
def constant_map(scope, colon2_t, name_t)
  if scope.nil?
    expr_l = loc(name_t)
  else
    expr_l = scope.loc.expression.join(loc(name_t))
  end

  Source::Map::Constant.new(loc(colon2_t), loc(name_t), expr_l)
end
definition_map(keyword_t, operator_t, name_t, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 1337
def definition_map(keyword_t, operator_t, name_t, end_t)
  Source::Map::Definition.new(loc(keyword_t),
                              loc(operator_t), loc(name_t),
                              loc(end_t))
end
delimited_string_map(string_t) click to toggle source
# File lib/parser/builders/default.rb, line 1171
def delimited_string_map(string_t)
  str_range = loc(string_t)

  begin_l = Source::Range.new(str_range.source_buffer,
                              str_range.begin_pos,
                              str_range.begin_pos + 1)

  end_l   = Source::Range.new(str_range.source_buffer,
                              str_range.end_pos - 1,
                              str_range.end_pos)

  Source::Map::Collection.new(begin_l, end_l,
                              loc(string_t))
end
diagnostic(type, reason, arguments, location, highlights=[]) click to toggle source
# File lib/parser/builders/default.rb, line 1571
def diagnostic(type, reason, arguments, location, highlights=[])
  @parser.diagnostics.process(
      Diagnostic.new(type, reason, arguments, location, highlights))

  if type == :error
    @parser.send :yyerror
  end
end
eh_keyword_map(compstmt_e, keyword_t, body_es, else_t, else_e) click to toggle source
# File lib/parser/builders/default.rb, line 1464
def eh_keyword_map(compstmt_e, keyword_t, body_es,
                   else_t, else_e)
  if compstmt_e.nil?
    if keyword_t.nil?
      begin_l = body_es.first.loc.expression
    else
      begin_l = loc(keyword_t)
    end
  else
    begin_l = compstmt_e.loc.expression
  end

  if else_t
    if else_e.nil?
      end_l = loc(else_t)
    else
      end_l = else_e.loc.expression
    end
  elsif !body_es.last.nil?
    end_l = body_es.last.loc.expression
  else
    end_l = loc(keyword_t)
  end

  Source::Map::Condition.new(loc(keyword_t), nil, loc(else_t), nil,
                             begin_l.join(end_l))
end
expr_map(loc) click to toggle source
# File lib/parser/builders/default.rb, line 1239
def expr_map(loc)
  Source::Map.new(loc)
end
for_map(keyword_t, in_t, begin_t, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 1445
def for_map(keyword_t, in_t, begin_t, end_t)
  Source::Map::For.new(loc(keyword_t), loc(in_t),
                       loc(begin_t), loc(end_t),
                       loc(keyword_t).join(loc(end_t)))
end
join_exprs(left_expr, right_expr) click to toggle source
# File lib/parser/builders/default.rb, line 1162
def join_exprs(left_expr, right_expr)
  left_expr.loc.expression.
    join(right_expr.loc.expression)
end
keyword_map(keyword_t, begin_t, args, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 1398
def keyword_map(keyword_t, begin_t, args, end_t)
  args ||= []

  if end_t
    end_l = loc(end_t)
  elsif args.any? && !args.last.nil?
    end_l = args.last.loc.expression
  elsif args.any? && args.count > 1
    end_l = args[-2].loc.expression
  else
    end_l = loc(keyword_t)
  end

  Source::Map::Keyword.new(loc(keyword_t), loc(begin_t), loc(end_t),
                           loc(keyword_t).join(end_l))
end
keyword_mod_map(pre_e, keyword_t, post_e) click to toggle source
# File lib/parser/builders/default.rb, line 1415
def keyword_mod_map(pre_e, keyword_t, post_e)
  Source::Map::Keyword.new(loc(keyword_t), nil, nil,
                           join_exprs(pre_e, post_e))
end
kwarg_map(name_t, value_e=nil) click to toggle source
# File lib/parser/builders/default.rb, line 1312
def kwarg_map(name_t, value_e=nil)
  label_range = loc(name_t)
  name_range  = Source::Range.new(label_range.source_buffer,
                                  label_range.begin_pos,
                                  label_range.end_pos - 1)

  if value_e
    expr_l = loc(name_t).join(value_e.loc.expression)
  else
    expr_l = loc(name_t)
  end

  Source::Map::Variable.new(name_range, expr_l)
end
loc(token) click to toggle source
# File lib/parser/builders/default.rb, line 1566
def loc(token)
  # Pass through `nil`s and return nil for tNL.
  token[1] if token && token[0]
end
module_definition_map(keyword_t, name_e, operator_t, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 1327
def module_definition_map(keyword_t, name_e, operator_t, end_t)
  if name_e
    name_l = name_e.loc.expression
  end

  Source::Map::Definition.new(loc(keyword_t),
                              loc(operator_t), name_l,
                              loc(end_t))
end
n(type, children, source_map) click to toggle source

SOURCE MAPS

# File lib/parser/builders/default.rb, line 1154
def n(type, children, source_map)
  AST::Node.new(type, children, :location => source_map)
end
n0(type, source_map) click to toggle source
# File lib/parser/builders/default.rb, line 1158
def n0(type, source_map)
  n(type, [], source_map)
end
numeric(kind, token) click to toggle source
# File lib/parser/builders/default.rb, line 98
def numeric(kind, token)
  n(kind, [ value(token) ],
    Source::Map::Operator.new(nil, loc(token)))
end
pair_keyword_map(key_t, value_e) click to toggle source
# File lib/parser/builders/default.rb, line 1202
def pair_keyword_map(key_t, value_e)
  key_range = loc(key_t)

  key_l   = Source::Range.new(key_range.source_buffer,
                              key_range.begin_pos,
                              key_range.end_pos - 1)

  colon_l = Source::Range.new(key_range.source_buffer,
                              key_range.end_pos - 1,
                              key_range.end_pos)

  [ # key map
    Source::Map::Collection.new(nil, nil,
                                key_l),
    # pair map
    Source::Map::Operator.new(colon_l,
                              key_range.join(value_e.loc.expression)) ]
end
pair_quoted_map(begin_t, end_t, value_e) click to toggle source
# File lib/parser/builders/default.rb, line 1221
def pair_quoted_map(begin_t, end_t, value_e)
  end_l = loc(end_t)

  quote_l = Source::Range.new(end_l.source_buffer,
                              end_l.end_pos - 2,
                              end_l.end_pos - 1)

  colon_l = Source::Range.new(end_l.source_buffer,
                              end_l.end_pos - 1,
                              end_l.end_pos)

  [ # modified end token
    [ value(end_t), quote_l ],
    # pair map
    Source::Map::Operator.new(colon_l,
                              loc(begin_t).join(value_e.loc.expression)) ]
end
prefix_string_map(symbol) click to toggle source
# File lib/parser/builders/default.rb, line 1186
def prefix_string_map(symbol)
  str_range = loc(symbol)

  begin_l = Source::Range.new(str_range.source_buffer,
                              str_range.begin_pos,
                              str_range.begin_pos + 1)

  Source::Map::Collection.new(begin_l, nil,
                              loc(symbol))
end
regexp_map(begin_t, end_t, options_e) click to toggle source
# File lib/parser/builders/default.rb, line 1269
def regexp_map(begin_t, end_t, options_e)
  Source::Map::Collection.new(loc(begin_t), loc(end_t),
                              loc(begin_t).join(options_e.loc.expression))
end
rescue_body_map(keyword_t, exc_list_e, assoc_t, exc_var_e, then_t, compstmt_e) click to toggle source
# File lib/parser/builders/default.rb, line 1451
def rescue_body_map(keyword_t, exc_list_e, assoc_t,
                    exc_var_e, then_t,
                    compstmt_e)
  end_l = compstmt_e.loc.expression if compstmt_e
  end_l = loc(then_t)               if end_l.nil? && then_t
  end_l = exc_var_e.loc.expression  if end_l.nil? && exc_var_e
  end_l = exc_list_e.loc.expression if end_l.nil? && exc_list_e
  end_l = loc(keyword_t)            if end_l.nil?

  Source::Map::RescueBody.new(loc(keyword_t), loc(assoc_t), loc(then_t),
                              loc(keyword_t).join(end_l))
end
send_binary_op_map(lhs_e, selector_t, rhs_e) click to toggle source
# File lib/parser/builders/default.rb, line 1369
def send_binary_op_map(lhs_e, selector_t, rhs_e)
  Source::Map::Send.new(nil, loc(selector_t),
                        nil, nil,
                        join_exprs(lhs_e, rhs_e))
end
send_index_map(receiver_e, lbrack_t, rbrack_t) click to toggle source
# File lib/parser/builders/default.rb, line 1387
def send_index_map(receiver_e, lbrack_t, rbrack_t)
  Source::Map::Send.new(nil, loc(lbrack_t).join(loc(rbrack_t)),
                        nil, nil,
                        receiver_e.loc.expression.join(loc(rbrack_t)))
end
send_map(receiver_e, dot_t, selector_t, begin_t=nil, args=[], end_t=nil) click to toggle source
# File lib/parser/builders/default.rb, line 1343
def send_map(receiver_e, dot_t, selector_t, begin_t=nil, args=[], end_t=nil)
  if receiver_e
    begin_l = receiver_e.loc.expression
  elsif selector_t
    begin_l = loc(selector_t)
  end

  if end_t
    end_l   = loc(end_t)
  elsif args.any?
    end_l   = args.last.loc.expression
  elsif selector_t
    end_l   = loc(selector_t)
  end

  Source::Map::Send.new(loc(dot_t),   loc(selector_t),
                        loc(begin_t), loc(end_t),
                        begin_l.join(end_l))
end
send_unary_op_map(selector_t, arg_e) click to toggle source
# File lib/parser/builders/default.rb, line 1375
def send_unary_op_map(selector_t, arg_e)
  if arg_e.nil?
    expr_l = loc(selector_t)
  else
    expr_l = loc(selector_t).join(arg_e.loc.expression)
  end

  Source::Map::Send.new(nil, loc(selector_t),
                        nil, nil,
                        expr_l)
end
static_regexp(parts, options) click to toggle source
# File lib/parser/builders/default.rb, line 1516
def static_regexp(parts, options)
  source = static_string(parts)
  return nil if source.nil?

  if defined?(Encoding)
    source = case
    when options.children.include?(:u)
      source.encode(Encoding::UTF_8)
    when options.children.include?(:e)
      source.encode(Encoding::EUC_JP)
    when options.children.include?(:s)
      source.encode(Encoding::WINDOWS_31J)
    when options.children.include?(:n)
      source.encode(Encoding::BINARY)
    else
      source
    end
  end

  Regexp.new(source, (Regexp::EXTENDED if options.children.include?(:x)))
end
static_regexp_node(node) click to toggle source
# File lib/parser/builders/default.rb, line 1538
def static_regexp_node(node)
  if node.type == :regexp
    parts, options = node.children[0..-2], node.children[-1]
    static_regexp(parts, options)
  end
end
static_string(nodes) click to toggle source

Extract a static string from e.g. a regular expression, honoring the fact that MRI expands interpolations like #{“”} at parse time.

# File lib/parser/builders/default.rb, line 1499
def static_string(nodes)
  nodes.map do |node|
    case node.type
    when :str
      node.children[0]
    when :begin
      if (string = static_string(node.children))
        string
      else
        return nil
      end
    else
      return nil
    end
  end.join
end
string_map(begin_t, parts, end_t) click to toggle source
# File lib/parser/builders/default.rb, line 1255
def string_map(begin_t, parts, end_t)
  if begin_t && value(begin_t).start_with?('<<')
    if parts.any?
      expr_l = join_exprs(parts.first, parts.last)
    else
      expr_l = loc(end_t).begin
    end

    Source::Map::Heredoc.new(loc(begin_t), expr_l, loc(end_t))
  else
    collection_map(begin_t, parts, end_t)
  end
end
string_value(token) click to toggle source
# File lib/parser/builders/default.rb, line 1555
def string_value(token)
  unless token[0].valid_encoding?
    diagnostic(:error, :invalid_encoding, nil, token[1])
  end

  token[0]
end
ternary_map(begin_e, question_t, mid_e, colon_t, end_e) click to toggle source
# File lib/parser/builders/default.rb, line 1440
def ternary_map(begin_e, question_t, mid_e, colon_t, end_e)
  Source::Map::Ternary.new(loc(question_t), loc(colon_t),
                           join_exprs(begin_e, end_e))
end
token_map(token) click to toggle source
# File lib/parser/builders/default.rb, line 1167
def token_map(token)
  Source::Map.new(loc(token))
end
unary_op_map(op_t, arg_e=nil) click to toggle source
# File lib/parser/builders/default.rb, line 1292
def unary_op_map(op_t, arg_e=nil)
  if arg_e.nil?
    expr_l = loc(op_t)
  else
    expr_l = loc(op_t).join(arg_e.loc.expression)
  end

  Source::Map::Operator.new(loc(op_t), expr_l)
end
unquoted_map(token) click to toggle source
# File lib/parser/builders/default.rb, line 1197
def unquoted_map(token)
  Source::Map::Collection.new(nil, nil,
                              loc(token))
end
value(token) click to toggle source
# File lib/parser/builders/default.rb, line 1550
def value(token)
  token[0]
end
Also aliased as: string_value
var_send_map(variable_e) click to toggle source
# File lib/parser/builders/default.rb, line 1363
def var_send_map(variable_e)
  Source::Map::Send.new(nil, variable_e.loc.expression,
                        nil, nil,
                        variable_e.loc.expression)
end
variable_map(name_t) click to toggle source
# File lib/parser/builders/default.rb, line 1284
def variable_map(name_t)
  Source::Map::Variable.new(loc(name_t))
end