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

CharStream	This interface describes a character stream that maintains line and column number positions of the characters.
FunctorParserConstants
FunctorRef	Contains and describes a functor being built by the functor parser.

Class Summary

BinaryFunctorRef	Contains and describes a BinaryFunctor being built by the functor parser.
FunctorParser	Parser that converts java-like expressions into functors.
FunctorParserTokenManager
GeneratorRef	Contains and describes a Generator being built by the functor parser.
GenericParser	FunctorParser that add runtime type-safe entry points to the non-generified base parser.
Token	Describes the input token stream.
UnaryFunctorRef	Contains and describes a UnaryFunctor being built by the functor parser.
UnicodeCharStream	An implementation of interface CharStream, where the stream is assumed to contain only ASCII characters (with java-like unicode escape processing).

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