| fri.patterns.interpreter.parsergenerator.lexer.LexerSemantic
All known Subclasses: fri.patterns.interpreter.parsergenerator.lexer.semantics.LexerReflectSemantic,
| LexerSemantic | | public interface LexerSemantic (Code) | | LexerSemantic receives a Rule and its a ResultTree with range.
It can look inside the syntax tree of a scanned token.
Calling resultTree.toString() will return the scanned text for that rule.
The responsibility of a LexerSemantic is to provide a Set of nonterminal
Strings contained in the used lexer syntax which it wants to process.
If it provides no such Set, all rules are passed to the Semantic (which
will be very time-consuming).
Created on 21.09.2005
author:
Fritz Ritzberger |
| Method Summary | |
| public Set | getIgnoredNonterminals()
Can return the String Set of nonterminals (must occur in syntax on left side)
this LexerSemantic does not want to dispatch. | | public Set | getWantedNonterminals()
Can return the String Set of nonterminals (must occur in syntax on left side)
this LexerSemantic wants to dispatch. | | public void | ruleEvaluated(Rule rule, ResultTree resultTree)
This is called by LexerImpl with a lexing Rule and its scanned result tree and range.
Calling resultTree.toString() will return the scanned text for the rule.
Calling resultTree.getRange() will return the range of the rule within input. |
| getIgnoredNonterminals | | public Set getIgnoredNonterminals()(Code) | | Can return the String Set of nonterminals (must occur in syntax on left side)
this LexerSemantic does not want to dispatch. This is an alternative to
getWantedNonterminals(). Returning null will not ignore any nonterminal or rule.
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| getWantedNonterminals | | public Set getWantedNonterminals()(Code) | | Can return the String Set of nonterminals (must occur in syntax on left side)
this LexerSemantic wants to dispatch. Returning null will enable all nonterminals or rules.
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| ruleEvaluated | | public void ruleEvaluated(Rule rule, ResultTree resultTree)(Code) | | This is called by LexerImpl with a lexing Rule and its scanned result tree and range.
Calling resultTree.toString() will return the scanned text for the rule.
Calling resultTree.getRange() will return the range of the rule within input.
No value stack is available for that semantic, so the method does not return anything.
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