Package org.moeaframework.util.grammar

Class Parser

java.lang.Object

org.moeaframework.util.grammar.Parser

public class Parser
extends Object

Parses simple context-free grammars in Backus-Naur form (BNF). The following example demonstrates the accepted syntax. Newlines indicate the end of a rule; single and double quotes can be used to escape the control characters (":", "=", "|", "//", etc.); C and C++ style comments are supported.

   <expr> ::= <expr> <op> <expr> | "func(" <expr> ")" | <val>
   <op> ::= + | - | * | '/'
   <val> ::= x | y | z
 

Method Summary

Modifier and Type	Method	Description
static ContextFreeGrammar	load(Reader reader)	Parses the context-free grammar.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

load

public static ContextFreeGrammar load(Reader reader)
                               throws IOException

Parses the context-free grammar.

Parameters:

reader - the Reader containing the BNF context-free grammar

Returns:

the grammar

Throws:

IOException - if an I/O error occurred

GrammarException - if an error occurred parsing the BNF context-free grammar