Exception: ANTLR3::Error::EarlyExit

Inherits:
RecognitionError show all
Defined in:
lib/antlr3/error.rb

Overview

error

EarlyExit

used by

all recognizers

occurs when

The recognizer is in a (..)+ subrule, meaning the recognizer must match the body of the subrule one or more times. If it fails to match at least one occurence of the subrule, the recognizer will raise an EarlyExit exception.

Example

consider a grammar like:

lexer grammar EarlyExitDemo;
...
ID: 'a'..'z' ('0'..'9')+;

now in ruby

require 'EarlyExitDemo'

input = ANTLR3::StringStream.new( "ab" )
lexer = EarlyExitDemo::Lexer.new( input )
lexer.next_token
# -> raises EarlyExit: line 1:1 required (...)+ loop did not match 
#                      anything at character "b"

Constant Summary

Constants included from Constants

Constants::BUILT_IN_TOKEN_NAMES, Constants::DEFAULT, Constants::DOWN, Constants::EOF, Constants::EOF_TOKEN, Constants::EOR_TOKEN_TYPE, Constants::HIDDEN, Constants::INVALID, Constants::INVALID_NODE, Constants::INVALID_TOKEN, Constants::MEMO_RULE_FAILED, Constants::MEMO_RULE_UNKNOWN, Constants::MIN_TOKEN_TYPE, Constants::SKIP_TOKEN, Constants::UP

Instance Attribute Summary collapse

Attributes inherited from RecognitionError

#column, #index, #input, #line, #source_name, #symbol, #token

Instance Method Summary collapse

Methods inherited from RecognitionError

#approximate_line_info?, #location, #unexpected_type

Constructor Details

#initialize(decision_number, input) ⇒ EarlyExit

Returns a new instance of EarlyExit.



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# File 'lib/antlr3/error.rb', line 449

def initialize( decision_number, input )
  @decision_number = decision_number
  super( input )
end

Instance Attribute Details

#decision_number ⇒ Object

Returns the value of attribute decision_number.



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# File 'lib/antlr3/error.rb', line 447

def decision_number
  @decision_number
end

Instance Method Details

#message ⇒ Object 



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# File 'lib/antlr3/error.rb', line 454

def message
  "The recognizer did not match anything for a (..)+ loop."
end