Class: Rattler::BackEnd::ParserGenerator::ExprGenerator

Inherits:
Object
  • Object
show all
Includes:
Parsers
Defined in:
lib/rattler/back_end/parser_generator/expr_generator.rb

Instance Method Summary collapse

Methods included from Parsers

define

Constructor Details

#initialize(g, choice_level = nil, sequence_level = nil, repeat_level = nil) ⇒ ExprGenerator

Returns a new instance of ExprGenerator.



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# File 'lib/rattler/back_end/parser_generator/expr_generator.rb', line 10

def initialize(g, choice_level=nil, sequence_level=nil, repeat_level=nil)
  @g = g
  @choice_level = choice_level
  @sequence_level = sequence_level
  @repeat_level = repeat_level
end

Instance Method Details

#gen_direct_action(parser, code, scope = {}) ⇒ Object 



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# File 'lib/rattler/back_end/parser_generator/expr_generator.rb', line 24

def gen_direct_action(parser, code, scope={})
  expr :block do
    gen_capture { block_given? ? yield : gen_basic(parser, scope) }
    (@g << ' &&').newline << '(' << code.bind(scope, direct_action_args) << ')'
  end
end

#gen_dispatch_action(parser, code, scope = {}) ⇒ Object 



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# File 'lib/rattler/back_end/parser_generator/expr_generator.rb', line 17

def gen_dispatch_action(parser, code, scope={})
  expr :block do
    gen_capture { block_given? ? yield : gen_basic(parser, scope) }
    (@g << ' &&').newline << code.bind(scope, dispatch_action_args)
  end
end

#gen_intermediate(parser, scope = {}) ⇒ Object 



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# File 'lib/rattler/back_end/parser_generator/expr_generator.rb', line 40

def gen_intermediate(parser, scope={})
  gen_basic parser, scope
end

#gen_intermediate_assert(parser, scope = {}) ⇒ Object 



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# File 'lib/rattler/back_end/parser_generator/expr_generator.rb', line 44

def gen_intermediate_assert(parser, scope={})
  gen_assert parser, scope
end

#gen_intermediate_disallow(parser, scope = {}) ⇒ Object 



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# File 'lib/rattler/back_end/parser_generator/expr_generator.rb', line 48

def gen_intermediate_disallow(parser, scope={})
  gen_disallow parser, scope
end

#gen_intermediate_skip(parser, scope = {}) ⇒ Object 



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# File 'lib/rattler/back_end/parser_generator/expr_generator.rb', line 52

def gen_intermediate_skip(parser, scope={})
  gen_skip parser, scope
end

#gen_token(parser, scope = {}) ⇒ Object 



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# File 'lib/rattler/back_end/parser_generator/expr_generator.rb', line 31

def gen_token(parser, scope={})
  expr :block do
    (@g << "#{token_pos_name} = @scanner.pos").newline
    gen_intermediate_skip parser, scope
    (@g << ' &&').newline
    @g << "@scanner.string[#{token_pos_name}...(@scanner.pos)]"
  end
end