class RuboCop::AST::NodePattern::Parser

Parser for NodePattern Note: class reopened in `parser.racc`

Doc on how this fits in the compiling process:

/docs/modules/ROOT/pages/node_pattern.adoc

Constants

Builder
Lexer
Racc_arg
Racc_debug_parser
Racc_token_to_s_table

Public Class Methods

new(builder = self.class::Builder.new) click to toggle source
Calls superclass method
# File lib/rubocop/ast/node_pattern/parser.rb, line 19
def initialize(builder = self.class::Builder.new)
  super()
  @builder = builder
end

Public Instance Methods

_reduce_10(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 333
def _reduce_10(val, _values)
 emit_call :predicate, *val
end
_reduce_11(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 337
def _reduce_11(val, _values)
 emit_call :node_type, *val
end
_reduce_13(val, _values) click to toggle source

reduce 12 omitted

# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 343
def _reduce_13(val, _values)
 emit_atom :symbol, *val
end
_reduce_14(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 347
def _reduce_14(val, _values)
 emit_atom :number, *val
end
_reduce_15(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 351
def _reduce_15(val, _values)
 emit_atom :string, *val
end
_reduce_16(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 355
def _reduce_16(val, _values)
 emit_atom :const, *val
end
_reduce_17(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 359
def _reduce_17(val, _values)
 emit_atom :named_parameter, *val
end
_reduce_18(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 363
def _reduce_18(val, _values)
 emit_atom :positional_parameter, *val
end
_reduce_19(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 367
def _reduce_19(val, _values)
 emit_atom :regexp, *val
end
_reduce_2(val, _values) click to toggle source

reduce 1 omitted

# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 301
def _reduce_2(val, _values)
 enforce_unary(val[0])
end
_reduce_20(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 371
def _reduce_20(val, _values)
 emit_atom :wildcard, *val
end
_reduce_21(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 375
def _reduce_21(val, _values)
 emit_atom :unify, *val
end
_reduce_22(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 379
def _reduce_22(val, _values)
 emit_union(*val)
end
_reduce_25(val, _values) click to toggle source

reduce 24 omitted

# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 387
def _reduce_25(val, _values)
        main, repeat_t = val
        emit_unary_op(:repetition, repeat_t, main, repeat_t)

end
_reduce_26(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 393
def _reduce_26(val, _values)
        opt_capture, bracket, node_pattern_list, opt_rest, close_bracket = val
        node_pattern_list << opt_rest if opt_rest
        main = emit_list :any_order, bracket, node_pattern_list, close_bracket
        emit_capture(opt_capture, main)

end
_reduce_3(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 305
def _reduce_3(val, _values)
 emit_list :sequence, *val
end
_reduce_33(val, _values) click to toggle source

reduce 32 omitted

# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 413
def _reduce_33(val, _values)
 emit_capture(val[0], emit_atom(:rest, val[1]))
end
_reduce_37(val, _values) click to toggle source

reduce 36 omitted

# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 423
def _reduce_37(val, _values)
 val
end
_reduce_38(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 427
def _reduce_38(val, _values)
 val
end
_reduce_39(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 431
def _reduce_39(val, _values)
 val[0] << val[2]
end
_reduce_4(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 309
def _reduce_4(val, _values)
 emit_list :intersection, *val
end
_reduce_40(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 435
def _reduce_40(val, _values)
 val
end
_reduce_41(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 439
def _reduce_41(val, _values)
 val[0] << val[1]
end
_reduce_42(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 443
def _reduce_42(val, _values)
 val
end
_reduce_43(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 447
def _reduce_43(val, _values)
 val[0] << val[1]
end
_reduce_44(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 451
def _reduce_44(val, _values)
 [[]]
end
_reduce_45(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 455
def _reduce_45(val, _values)
 val[0].last << val[1]; val[0]
end
_reduce_46(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 459
def _reduce_46(val, _values)
 val[0] << []
end
_reduce_5(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 313
def _reduce_5(val, _values)
 emit_unary_op :negation, *val
end
_reduce_6(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 317
def _reduce_6(val, _values)
 emit_unary_op :ascend, *val
end
_reduce_7(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 321
def _reduce_7(val, _values)
 emit_unary_op :descend, *val
end
_reduce_8(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 325
def _reduce_8(val, _values)
 emit_capture(*val)
end
_reduce_9(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 329
def _reduce_9(val, _values)
 emit_call :function_call, *val
end
_reduce_none(val, _values) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.racc.rb, line 463
def _reduce_none(val, _values)
  val[0]
end
inspect() click to toggle source
# File lib/rubocop/ast/node_pattern/parser.rb, line 40
def inspect
  "<##{self.class}>"
end
parse(source) click to toggle source

(Similar API to `parser` gem) Parses a source and returns the AST.

@param [Parser::Source::Buffer, String] source_buffer The source buffer to parse. @return [NodePattern::Node]

# File lib/rubocop/ast/node_pattern/parser.rb, line 31
def parse(source)
  @lexer = self.class::Lexer.new(source)
  do_parse
rescue Lexer::Error => e
  raise NodePattern::Invalid, e.message
ensure
  @lexer = nil # Don't keep references
end

Private Instance Methods

enforce_unary(node) click to toggle source
# File lib/rubocop/ast/node_pattern/parser.rb, line 50
def enforce_unary(node)
  return node if node.arity == 1

  detail = node.loc&.expression&.source || node.to_s
  raise NodePattern::Invalid, 'parse error, expected unary node pattern ' \
                              "but got expression matching multiple elements: #{detail}"
end
on_error(token, val, _vstack) click to toggle source

Overrides Racc::Parser's method:

# File lib/rubocop/ast/node_pattern/parser.rb, line 59
def on_error(token, val, _vstack)
  detail = token_to_str(token) || '?'
  raise NodePattern::Invalid, "parse error on value #{val.inspect} (#{detail})"
end