Skylark rule for Java CUP

Attributes

name (Name; required) Unique name for this target.
src (Label; required) The CUP specification.
parser (String; optional) The class name of the parser to generate. Defaults to parser, hence generating parser.java. Note that the lower case is used to behave like the CUP program.
symbols (String; optional) The class name of the symbols holder. Defaults to sym, hence generating sym.java. Note that the lower case is used to behave like the CUP program.

The example //java/jflex/examples/helloworld generates a lexer from helloworld.flex with:

cup(
    name = "gen_parser",
    src = "calculator.cup",
    parser = "CalculatorParser",
    symbols = "Calc",
)