Package net.sf.jga.parser

Parser that allows expressions of an as-yet unnamed Java-like language to be parsed to create functors.

See:
Description

Interface Summary

FunctorParser	Parses strings containing JXFG scripts and produces functors.
FunctorRef<R,F extends Functor<R>>	Contains and describes a functor being built by the functor parser.
JFXGParserConstants

Class Summary

BinaryFunctorRef<T1,T2,R>	Contains and describes a BinaryFunctor being built by the functor parser.
GeneratorRef<R>	Contains and describes a Generator being built by the functor parser.
GenericParser	FunctorParser wrapper that adds runtime type-safe entry points to the non-generified base parser.
JavaCharStream	An implementation of interface CharStream, where the stream is assumed to contain only ASCII characters (with java-like unicode escape processing).
JFXGParser	Parser that converts JFXG strings into functors.
JFXGParserTokenManager
Multiplex	Routes an array of values to a given array of unary functions, returning an array containing the results.
ParserUtils	ParserUtils.java
SetAndReturnField<T,V>	Similar to the standard SetField functor, except that the fn() method returns the value passed rather than null
Token	Describes the input token stream.
UnaryFunctorRef<T,R>	Contains and describes a UnaryFunctor being built by the functor parser.
VariableFunctorRef<R,F extends Functor<R>>
VariableRef<T>

Enum Summary

ArithmeticOperator

Exception Summary

ParseException	This exception is thrown when parse errors are encountered.
UncheckedParseException	Unchecked version of ParseException, generated by the static evaluation methods.

Error Summary

TokenMgrError

Package net.sf.jga.parser Description

Parser that allows expressions of an as-yet unnamed Java-like language to be parsed to create functors. The langauge is a subset of a Java 1.5 grammar, whose BNF form is available here. While it is an incomplete subset of the Java expression syntax, what's already implemented is enough to be interesting. You can do basic arithmetic (with all standard Number implementations, including BigDecimal and BigInteger), relational comparisons, shifts, boolean expressions, conditionals, call constructors and methods, reference member variables, cast values, test instanceof, and reference class constants (including enumerated values when run on Java 1.5). Essentially, the grammar allows anything that can be typed on the right side of a Java assignment statement.

The following expression syntax is not implemented in the current release.

• arrays
• numeric coercion (arithmetic and relational operands must cast if necessary)
• Nested class constructor calls (ie, the rarely used "foo.new bar()" syntax)
• assignments or assignment forms (i.e.: +=, -=, etc)
• pre- or post- increment or decrements
• anonymous class creation