Class: Depager::LALR::Action

Inherits:

AdvancedParser

• Object
• Parser
• AdvancedParser
• Depager::LALR::Action

Defined in:

lib/depager/parser.rb

Direct Known Subclasses

ASTBuilderExtension::PostRhs1::Action, ASTBuilderExtension::PreRuleList0::Action, CSTBuilderExtension::PostLhs1::Action, CSTBuilderExtension::PreRuleList0::Action, Depager::LexerExtension::PreRuleList0::Action, RieExtension::PostLhs0::Action, RieExtension::PostRhs1::Action, StatefulLexerExtension::PreRhsPostSymbol1::Action, StatefulLexerExtension::PreRuleList0::Action

Constant Summary

Constants inherited from Parser

Parser::ACC

Instance Attribute Summary

Attributes inherited from AdvancedParser

#basis, #decorator_index

Instance Method Summary

• #after_reduce ⇒ Object
• #before_reduce ⇒ Object
• #initialize(inside) ⇒ Action constructor

  A new instance of Action.

• #on_reduce ⇒ Object

Methods inherited from AdvancedParser

#accept, #error, #reduce, #shift

Methods inherited from Parser

#accept, #action_table, #defred_after_shift_table, #defred_table, #error, #goto_table, #int_to_nonterm, #int_to_term, #lex, #nonterm_to_int, #parse, #reduce, #reduce_table, #shift, #term_to_int

Constructor Details

#initialize(inside) ⇒ Action

Returns a new instance of Action.

# File 'lib/depager/parser.rb', line 248

def initialize(inside)
  super
  @_arguments = []
end

Instance Method Details

#after_reduce ⇒ Object

# File 'lib/depager/parser.rb', line 262

def after_reduce
  method = on_reduce[-action_value]
  result = method ? send(method, @_arguments) : nil
  stack[stack.size - 2][decorator_index] = result
end

#before_reduce ⇒ Object

# File 'lib/depager/parser.rb', line 253

def before_reduce
  @_arguments = []
  n = reduce_table[-action_value][1]
  n.times do |i|
    v = stack[stack.size - (2 * (i + 1))]
    @_arguments[n - i - 1] = v[1] == :NT ? v[decorator_index] : v[1]
  end
end

#on_reduce ⇒ Object

# File 'lib/depager/parser.rb', line 246

def on_reduce; end