Module: Pione::Lang::DeclarationParser

Includes:
Parslet
Included in:
DocumentParser, PNML::Parser
Defined in:
lib/pione/lang/declaration-parser.rb

Overview

DeclarationParser is a set of parsers for PIONE declaration setences and blocks.

Constant Summary collapse

SENTENCES =

SENTENCES is a list of declarative sentences in PIONE language.

[
  :variable_binding_sentence,
  :package_binding_sentence,
  :param_sentence,
  :rule_binding_sentence,
  :constituent_rule_sentence,
  :input_sentence,
  :output_sentence,
  :feature_sentence,
  :constraint_sentence,
  :annotation_sentence,
  :expr_sentence
]
BLOCKS =

BLOCKS is a list of declaration blocks in PIONE language.

[
  :param_block,
  :flow_rule_block,
  :action_rule_block,
  :empty_rule_block
]

Instance Method Summary collapse

Instance Method Details

#binding_sentence(declarator, operator, omittable) ⇒ Object

Make a parser for binding sentences.



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# File 'lib/pione/lang/declaration-parser.rb', line 53

def binding_sentence(declarator, operator, omittable)
  binding = expr.as(:expr1) >> padded?(operator) >> expr!.as(:expr2)

  if omittable
    line((declarator.as(:declarator) >> pad).maybe >> binding)
  else
    line(declarator.as(:declarator) >> pad >> binding)
  end
end