java_cup
Class Main

java.lang.Object
  java_cup.Main

public class Main
extends java.lang.Object

This class serves as the main driver for the JavaCup system. It accepts user options and coordinates overall control flow. The main flow of control includes the following activities:

• Parse user supplied arguments and options.
• Open output files.
• Parse the specification from standard input.
• Check for unused terminals, non-terminals, and productions.
• Build the state machine, tables, etc.
• Output the generated code.
• Close output files.
• Print a summary if requested.

Options to the main program include:

-package name

specify package generated classes go in [default none]

-parser name

specify parser class name [default "parser"]

-symbols name

specify name for symbol constant class [default "sym"]

-interface

emit symbol constant interface, rather than class

-nonterms

put non terminals in symbol constant class

-expect #

number of conflicts expected/allowed [default 0]

-compact_red

compact tables by defaulting to most frequent reduce

-nowarn

don't warn about useless productions, etc.

-nosummary

don't print the usual summary of parse states, etc.

-progress

print messages to indicate progress of the system

-time

print time usage summary

-dump_grammar

produce a dump of the symbols and grammar

-dump_states

produce a dump of parse state machine

-dump_tables

produce a dump of the parse tables

-dump

produce a dump of all of the above

-debug

turn on debugging messages within JavaCup

-nopositions

don't generate the positions code

-noscanner

don't refer to java_cup.runtime.Scanner in the parser (for compatibility with old runtimes)

-version

print version information for JavaCUP and halt.

Version:

last updated: 7/3/96

Author:

Frank Flannery

Method Summary

static void	dump_grammar() Produce a human readable dump of the grammar.
static void	dump_machine() Produce a (semi-) human readable dump of the complete viable prefix recognition state machine.
static void	dump_tables() Produce a (semi-) human readable dumps of the parse tables
static void	main(java.lang.String[] argv) The main driver for the system.

Methods inherited from class java.lang.Object

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

Method Detail

main

public static void main(java.lang.String[] argv)
                 throws internal_error,
                        java.io.IOException,
                        java.lang.Exception

The main driver for the system.

Parameters:

argv - an array of strings containing command line arguments.

Throws:

internal_error

java.io.IOException

java.lang.Exception

dump_grammar

public static void dump_grammar()
                         throws internal_error

Produce a human readable dump of the grammar.

Throws:

internal_error

dump_machine

public static void dump_machine()

Produce a (semi-) human readable dump of the complete viable prefix recognition state machine.

dump_tables

public static void dump_tables()

Produce a (semi-) human readable dumps of the parse tables