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# Checking Java Push Parsing. -*- Autotest -*-
# Copyright (C) 2013-2015, 2018-2022 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# The Java push parser tests are intended primarily
# to verify that the sequence of states that the parser
# traverses is the same as a pull parser would traverse.
##################################################
# Provide a way to generate data with and without push parsing
# so it is possible to capture the output for comparison
# (except the "trivial" tests).
# Use "both" rather than "push" so we can also set it to "pull" to
# get the "experr" data.
m4_define([PUSHPULLFLAG],[-Dapi.push-pull=both])
# AT_CHECK_JAVA_GREP(FILE, [LINE], [COUNT=1])
# -------------------------------------------
# Check that FILE contains exactly COUNT lines matching ^LINE$
# with grep. Unquoted so that COUNT can be a shell expression.
m4_define([AT_CHECK_JAVA_GREP],
[AT_CHECK_UNQUOTED([grep -c '^$2$' $1], [ignore], [m4_default([$3], [1])
])])
##################################################
AT_BANNER([[Java Push Parsing Tests]])
# Define a single copy of the trivial parser grammar.
# This is missing main(), so two versions
# are instantiated with different main() procedures.
m4_define([AT_TRIVIAL_GRAMMAR],
[[
%define api.parser.class {YYParser}
%define parse.error verbose
%define parse.trace
%code imports {
import java.io.*;
import java.util.*;
}
%%
start: 'a' 'b' 'c' ;
%%
]])
# Define common code across to be included in
# class Main for the trivial parser tests.
m4_define([AT_TRIVIAL_COMMON],[[
static class YYerror implements YYParser.Lexer
{
public Object getLVal() {return null;}
public int yylex () throws java.io.IOException { return 0; }
public void yyerror (String msg) { System.err.println(msg); }
}
static YYParser parser = null;
static YYerror yyerror = null;
static int teststate = -1;
static void setup()
throws IOException
{
yyerror = new YYerror();
parser = new YYParser(yyerror);
parser.setDebugLevel(1);
teststate = -1;
}
static String[] teststatename
= new String[]{"YYACCEPT","YYABORT","YYERROR","UNKNOWN","YYPUSH_MORE"};
static void check(int teststate, int expected, String msg)
{
System.err.println("teststate="+teststatename[teststate]
+"; expected="+teststatename[expected]);
if (teststate != expected)
{
System.err.println("unexpected state: "+msg);
System.exit(1);
}
}
]])
m4_define([AT_TRIVIAL_PARSER],[[
]AT_TRIVIAL_GRAMMAR[
public class Main
{
]AT_TRIVIAL_COMMON[
static public void main (String[] args)
throws IOException
{
setup();
teststate = parser.push_parse('a', null);
check(teststate,YYParser.YYPUSH_MORE,"push_parse('a', null)");
setup();
teststate = parser.push_parse('a', null);
check(teststate,YYParser.YYPUSH_MORE,"push_parse('a', null)");
teststate = parser.push_parse('b', null);
check(teststate,YYParser.YYPUSH_MORE,"push_parse('b', null)");
teststate = parser.push_parse('c', null);
check(teststate,YYParser.YYPUSH_MORE,"push_parse('c', null)");
teststate = parser.push_parse('\0', null);
check(teststate,YYParser.YYACCEPT,"push_parse('\\0', null)");
/* Reuse the parser instance and cause a failure */
teststate = parser.push_parse('b', null);
check(teststate,YYParser.YYABORT,"push_parse('b', null)");
System.exit(0);
}
}
]])
m4_define([AT_TRIVIAL_PARSER_INITIAL_ACTION],[[
]AT_TRIVIAL_GRAMMAR[
public class Main
{
]AT_TRIVIAL_COMMON[
static public void main (String[] args)
throws IOException
{
setup();
teststate = parser.push_parse('a', null);
check(teststate,YYParser.YYPUSH_MORE,"push_parse('a', null)");
teststate = parser.push_parse('b', null);
check(teststate,YYParser.YYPUSH_MORE,"push_parse('b', null)");
teststate = parser.push_parse('c', null);
check(teststate,YYParser.YYPUSH_MORE,"push_parse('c', null)");
teststate = parser.push_parse('\0', null);
check(teststate,YYParser.YYACCEPT,"push_parse('\\0', null)");
System.exit(0);
}
}
]])
## ----------------------------------------------------- ##
## Trivial Push Parser with api.push-pull verification. ##
## ----------------------------------------------------- ##
AT_SETUP([Trivial Push Parser with api.push-pull verification])
AT_BISON_OPTION_PUSHDEFS
AT_DATA([[input.y]],
[[%language "Java"
]AT_TRIVIAL_PARSER[
]])
# Verify that the proper procedure(s) are generated for each case.
AT_BISON_CHECK([[-Dapi.push-pull=pull -o Main.java input.y]])
AT_CHECK_JAVA_GREP([[Main.java]],
[[.*public boolean parse().*]],
[1])
# If BISON_USE_PUSH_FOR_PULL is set, then we have one occurrence of
# this function, otherwise it should not be there.
AT_CHECK_JAVA_GREP([[Main.java]],
[[.*public int push_parse(int yylextoken, Object yylexval).*]],
[${BISON_USE_PUSH_FOR_PULL-0}])
AT_BISON_CHECK([[-Dapi.push-pull=both -o Main.java input.y]])
AT_CHECK_JAVA_GREP([[Main.java]],
[[.*public boolean parse().*]],
[1])
AT_CHECK_JAVA_GREP([[Main.java]],
[[.*public int push_parse(int yylextoken, Object yylexval).*]],
[1])
AT_BISON_CHECK([[-Dapi.push-pull=push -o Main.java input.y]])
AT_CHECK_JAVA_GREP([[Main.java]],
[[.*public boolean parse().*]],
[0])
AT_CHECK_JAVA_GREP([[Main.java]],
[[.*public int push_parse(int yylextoken, Object yylexval).*]],
[1])
AT_JAVA_COMPILE([[Main.java]])
AT_JAVA_PARSER_CHECK([Main], 0, [], [stderr-nolog])
AT_BISON_OPTION_POPDEFS
AT_CLEANUP
## ------------------------------------------ ##
## Trivial Push Parser with %initial-action. ##
## ------------------------------------------ ##
AT_SETUP([Trivial Push Parser with %initial-action])
AT_BISON_OPTION_PUSHDEFS
AT_DATA([[input.y]],
[[%language "Java"
%initial-action {
System.err.println("Initial action invoked");
}
]AT_TRIVIAL_PARSER_INITIAL_ACTION[
]])
AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([[-Dapi.push-pull=push -o Main.java input.y]])
AT_CHECK_JAVA_GREP([[Main.java]],
[[System.err.println("Initial action invoked");]])
AT_JAVA_COMPILE([[Main.java]])
AT_JAVA_PARSER_CHECK([Main], 0, [], [stderr-nolog])
# Verify that initial action is called exactly once.
AT_CHECK_JAVA_GREP(
[[stderr]],
[[Initial action invoked]],
[1])
AT_CLEANUP
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