tests: use the generalized default yylex.

[bison.git] / tests / java.at

# Java tests for simple calculator.           -*- Autotest -*-

# Copyright (C) 2007-2012 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 <http://www.gnu.org/licenses/>.

AT_BANNER([[Java Calculator.]])


# ------------------------- #
# Helping Autotest macros.  #
# ------------------------- #


# _AT_DATA_JAVA_CALC_Y($1, $2, $3, [BISON-DIRECTIVES])
# ----------------------------------------------------------------------
# Produce `calc.y'.  Don't call this macro directly, because it contains
# some occurrences of `$1' etc. which will be interpreted by m4.  So
# you should call it with $1, $2, and $3 as arguments, which is what
# AT_DATA_JAVA_CALC_Y does.
m4_define([_AT_DATA_JAVA_CALC_Y],
[m4_if([$1$2$3], $[1]$[2]$[3], [],
       [m4_fatal([$0: Invalid arguments: $@])])dnl
AT_BISON_OPTION_PUSHDEFS([%language "Java" $4])
AT_DATA([Calc.y],
[[/* Infix notation calculator--calc */
%language "Java"
%name-prefix "Calc"
%define parser_class_name "Calc"
%define public

]$4[

%code imports {
  import java.io.StreamTokenizer;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.Reader;
  import java.io.IOException;
}

/* Bison Declarations */
%token <Integer> NUM "number"
%type  <Integer> exp

%nonassoc '=' /* comparison            */
%left '-' '+'
%left '*' '/'
%left NEG     /* negation--unary minus */
%right '^'    /* exponentiation        */

/* Grammar follows */
%%
input:
  line
| input line
;

line:
  '\n'
| exp '\n'
| error '\n'
;

exp:
  NUM                { $$ = $1;                                             }
| exp '=' exp
  {
    if ($1.intValue () != $3.intValue ())
      yyerror (]AT_LOCATION_IF([[@$,]])[ "calc: error: " + $1 + " != " + $3);
  }
| exp '+' exp        { $$ = new Integer ($1.intValue () + $3.intValue ());  }
| exp '-' exp        { $$ = new Integer ($1.intValue () - $3.intValue ());  }
| exp '*' exp        { $$ = new Integer ($1.intValue () * $3.intValue ());  }
| exp '/' exp        { $$ = new Integer ($1.intValue () / $3.intValue ());  }
| '-' exp  %prec NEG { $$ = new Integer (-$2.intValue ());                  }
| exp '^' exp        { $$ = new Integer ((int)
                                         Math.pow ($1.intValue (),
                                                   $3.intValue ()));        }
| '(' exp ')'        { $$ = $2;                                             }
| '(' error ')'      { $$ = new Integer (1111);                             }
| '!'                { $$ = new Integer (0); return YYERROR;                }
| '-' error          { $$ = new Integer (0); return YYERROR;                }
;

]AT_LEXPARAM_IF([[
%code lexer {
]],
[[
%%
class CalcLexer implements Calc.Lexer {
]])[
  StreamTokenizer st;

  public ]AT_LEXPARAM_IF([[YYLexer]], [[CalcLexer]]) (InputStream is)
  {
    st = new StreamTokenizer (new InputStreamReader (is));
    st.resetSyntax ();
    st.eolIsSignificant (true);
    st.whitespaceChars (9, 9);
    st.whitespaceChars (32, 32);
    st.wordChars (48, 57);
  }

AT_LOCATION_IF([[
  Position yypos = new Position (1, 0);

  public Position getStartPos() {
    return yypos;
  }

  public Position getEndPos() {
    return yypos;
  }
]])[
  ]AT_YYERROR_DEFINE[

  Integer yylval;

  public Object getLVal() {
    return yylval;
  }

  public int yylex () throws IOException {
    int ttype = st.nextToken ();
    ]AT_LOCATION_IF([[yypos = new Position (yypos.lineno (),
                                            yypos.token () + 1);]])[
    if (ttype == st.TT_EOF)
      return Calc.EOF;

    else if (ttype == st.TT_EOL)
      {
        ]AT_LOCATION_IF([[yypos = new Position (yypos.lineno () + 1, 0);]])[
        return (int) '\n';
      }

    else if (ttype == st.TT_WORD)
      {
        yylval = new Integer (st.sval);
        return Calc.NUM;
      }

    else
      return st.ttype;
  }


]AT_LEXPARAM_IF([[
};
%%]], [[
}]])

[
class Position {
  public int line;
  public int token;

  public Position ()
  {
    line = 0;
    token = 0;
  }

  public Position (int l, int t)
  {
    line = l;
    token = t;
  }

  public boolean equals (Position l)
  {
    return l.line == line && l.token == token;
  }

  public String toString ()
  {
    return Integer.toString (line) + "." + Integer.toString(token);
  }

  public int lineno ()
  {
    return line;
  }

  public int token ()
  {
    return token;
  }
}

]])
AT_BISON_OPTION_POPDEFS
])# _AT_DATA_JAVA_CALC_Y


# AT_DATA_CALC_Y([BISON-OPTIONS])
# -------------------------------
# Produce `calc.y'.
m4_define([AT_DATA_JAVA_CALC_Y],
[_AT_DATA_JAVA_CALC_Y($[1], $[2], $[3], [$1])
])


# _AT_CHECK_JAVA_CALC_ERROR(BISON-OPTIONS, INPUT,
#                           [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
# --------------------------------------------------------------
# Run `calc' on INPUT, and expect a `syntax error' message.
#
# If INPUT starts with a slash, it is used as absolute input file name,
# otherwise as contents.
#
# The VERBOSE-AND-LOCATED-ERROR-MESSAGE is stripped of locations
# and expected tokens if necessary, and compared with the output.
m4_define([_AT_CHECK_JAVA_CALC_ERROR],
[m4_bmatch([$2], [^/],
           [AT_JAVA_PARSER_CHECK([Calc < $2], 0, [], [stderr])],
           [AT_DATA([[input]],
[[$2
]])
AT_JAVA_PARSER_CHECK([Calc < input], 0, [], [stderr])])

# Normalize the observed and expected error messages, depending upon the
# options.
# 1. Create the reference error message.
AT_DATA([[expout]],
[$3
])
# 2. If locations are not used, remove them.
AT_YYERROR_SEES_LOC_IF([],
[[sed 's/^[-0-9.]*: //' expout >at-expout
mv at-expout expout]])
# 3. If error-verbose is not used, strip the`, unexpected....' part.
m4_bmatch([$1], [%error-verbose], [],
[[sed 's/syntax error, .*$/syntax error/' expout >at-expout
mv at-expout expout]])
# 4. Check
AT_CHECK([cat stderr], 0, [expout])
])

# _AT_CHECK_JAVA_CALC([BISON-DIRECTIVES], [BISON-CODE])
# -----------------------------------------------------------------------
# Start a testing chunk which compiles `calc' grammar with
# BISON-DIRECTIVES, and performs several tests over the parser.
m4_define([_AT_CHECK_JAVA_CALC],
[# We use integers to avoid dependencies upon the precision of doubles.
AT_SETUP([Calculator $1])

AT_BISON_OPTION_PUSHDEFS([$1])

AT_DATA_JAVA_CALC_Y([$1
%code {
$2
}])

AT_BISON_CHECK([-o Calc.java Calc.y])
AT_JAVA_COMPILE([Calc.java])

# Test the priorities.
AT_DATA([[input]],
[[1 + 2 * 3 = 7
1 + 2 * -3 = -5

-1^2 = -1
(-1)^2 = 1

---1 = -1

1 - 2 - 3 = -4
1 - (2 - 3) = 2

2^2^3 = 256
(2^2)^3 = 64
]])
AT_JAVA_PARSER_CHECK([Calc < input], 0, [], [stderr])


# Some syntax errors.
_AT_CHECK_JAVA_CALC_ERROR([$1], [0 0],
                          [1.2: syntax error, unexpected number])
_AT_CHECK_JAVA_CALC_ERROR([$1], [1//2],
                          [1.3: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
_AT_CHECK_JAVA_CALC_ERROR([$1], [error],
                          [1.1: syntax error, unexpected $undefined])
_AT_CHECK_JAVA_CALC_ERROR([$1], [1 = 2 = 3],
                          [1.4: syntax error, unexpected '='])
_AT_CHECK_JAVA_CALC_ERROR([$1], [
+1],
                          [2.1: syntax error, unexpected '+'])
# Exercise error messages with EOF: work on an empty file.
_AT_CHECK_JAVA_CALC_ERROR([$1], [/dev/null],
                          [1.1: syntax error, unexpected end of input])

# Exercise the error token: without it, we die at the first error,
# hence be sure to
#
# - have several errors which exercise different shift/discardings
#   - (): nothing to pop, nothing to discard
#   - (1 + 1 + 1 +): a lot to pop, nothing to discard
#   - (* * *): nothing to pop, a lot to discard
#   - (1 + 2 * *): some to pop and discard
#
# - test the action associated to `error'
#
# - check the lookahead that triggers an error is not discarded
#   when we enter error recovery.  Below, the lookahead causing the
#   first error is ")", which is needed to recover from the error and
#   produce the "0" that triggers the "0 != 1" error.
#
_AT_CHECK_JAVA_CALC_ERROR([$1],
                          [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
[1.2: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
1.11: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
1.14: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
1.24: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
1.1-1.27: calc: error: 4444 != 1])

# The same, but this time exercising explicitly triggered syntax errors.
# POSIX says the lookahead causing the error should not be discarded.
_AT_CHECK_JAVA_CALC_ERROR([$1], [(!) + (0 0) = 1],
[1.7: syntax error, unexpected number
1.1-1.10: calc: error: 2222 != 1])
_AT_CHECK_JAVA_CALC_ERROR([$1], [(- *) + (0 0) = 1],
[1.3: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
1.8: syntax error, unexpected number
1.1-1.11: calc: error: 2222 != 1])
AT_BISON_OPTION_POPDEFS

AT_CLEANUP
])# _AT_CHECK_JAVA_CALC


# AT_CHECK_JAVA_CALC([BISON-DIRECTIVES])
# --------------------------------------------------------
# Start a testing chunk which compiles `calc' grammar with
# BISON-DIRECTIVES, and performs several tests over the parser.
# Run the test with and without %error-verbose.
m4_define([AT_CHECK_JAVA_CALC],
[_AT_CHECK_JAVA_CALC([$1], [$2])
_AT_CHECK_JAVA_CALC([%error-verbose $1], [$2])
_AT_CHECK_JAVA_CALC([%locations $1], [$2])
_AT_CHECK_JAVA_CALC([%error-verbose %locations $1], [$2])
])# AT_CHECK_JAVA_CALC


# ------------------------ #
# Simple LALR Calculator.  #
# ------------------------ #

AT_CHECK_JAVA_CALC([], [[
  public static void main (String args[]) throws IOException
  {
    CalcLexer l = new CalcLexer (System.in);
    Calc p = new Calc (l);
    p.parse ();
  }
]])

AT_CHECK_JAVA_CALC([%lex-param { InputStream is } ], [[
  public static void main (String args[]) throws IOException
  {
    new Calc (System.in).parse ();
  }
]])



# -----------------#
# Java Directives. #
# -----------------#

AT_BANNER([Java Parameters.])


# AT_CHECK_JAVA_MINIMAL([DIRECTIVES], [PARSER_ACTION], [POSITION_CLASS])
# ----------------------------------------------------------------------
# Check that a mininal parser with DIRECTIVES compiles in Java.
# Put the Java code in YYParser.java.
m4_define([AT_CHECK_JAVA_MINIMAL],
[
AT_DATA([[YYParser.y]], [
%language "Java"
%locations
%debug
%error-verbose
%token-table
$1
%%
start: "end" {$2};
%%
class m4_default([$3], [Position]) {}
])
AT_BISON_CHECK([[YYParser.y]])
AT_CHECK([[grep '[mb]4_' YYParser.y]], [1], [ignore])
AT_JAVA_COMPILE([[YYParser.java]])
])


# AT_CHECK_JAVA_MINIMAL_W_LEXER([1:DIRECTIVES], [2:LEX_THROWS],
#       [3:YYLEX_ACTION], [4:LEXER_BODY], [5:PARSER_ACTION], [6:STYPE],
#       [7:POSITION_TYPE], [8:LOCATION_TYPE])
# ---------------------------------------------------------------------
# Check that a mininal parser with DIRECTIVES and a "%code lexer".
# YYLEX is the body of yylex () which throws LEX_THROW.
# compiles in Java.
m4_define([AT_CHECK_JAVA_MINIMAL_W_LEXER],
[AT_CHECK_JAVA_MINIMAL([$1

%code lexer
{
  m4_default([$6], [Object]) yylval;
  public m4_default([$6], [Object]) getLVal() { return yylval; }

  public m4_default([$7], [Position]) getStartPos() { return null; }
  public m4_default([$7], [Position]) getEndPos()   { return null; }

  public void yyerror (m4_default([$8], [Location]) loc, String s)
  {
    System.err.println (loc + ": " + s);
  }

  public int yylex ()$2
  {
    $3
  }

  $4
}], [$5], [$7])])


# AT_CHECK_JAVA_GREP([LINE], [COUNT=1])
# -------------------------------------
# Check that YYParser.java contains exactly COUNT lines matching ^LINE$
# with grep.
m4_define([AT_CHECK_JAVA_GREP],
	[AT_CHECK([grep -c '^$1$' YYParser.java], [], [m4_default([$2], [1])
])
])


# ----------------------------------- #
# Java parser class and package names #
# ----------------------------------- #

AT_SETUP([Java parser class and package names])

AT_CHECK_JAVA_MINIMAL([])
AT_CHECK_JAVA_GREP([[class YYParser]])

AT_CHECK_JAVA_MINIMAL([[%name-prefix "Prefix"]])
AT_CHECK_JAVA_GREP([[class PrefixParser]])

AT_CHECK_JAVA_MINIMAL([[%define parser_class_name "ParserClassName"]])
AT_CHECK_JAVA_GREP([[class ParserClassName]])

AT_CHECK_JAVA_MINIMAL([[%define package "user_java_package"]])
AT_CHECK_JAVA_GREP([[package user_java_package;]])

AT_CLEANUP


# --------------------------- #
# Java parser class modifiers #
# --------------------------- #

AT_SETUP([Java parser class modifiers])

AT_CHECK_JAVA_MINIMAL([[%define abstract]])
AT_CHECK_JAVA_GREP([[abstract class YYParser]])

AT_CHECK_JAVA_MINIMAL([[%define final]])
AT_CHECK_JAVA_GREP([[final class YYParser]])

AT_CHECK_JAVA_MINIMAL([[%define strictfp]])
AT_CHECK_JAVA_GREP([[strictfp class YYParser]])

AT_CHECK_JAVA_MINIMAL([[
%define abstract
%define strictfp]])
AT_CHECK_JAVA_GREP([[abstract strictfp class YYParser]])

AT_CHECK_JAVA_MINIMAL([[
%define final
%define strictfp]])
AT_CHECK_JAVA_GREP([[final strictfp class YYParser]])

AT_CHECK_JAVA_MINIMAL([[%define public]])
AT_CHECK_JAVA_GREP([[public class YYParser]])

AT_CHECK_JAVA_MINIMAL([[
%define public
%define abstract]])
AT_CHECK_JAVA_GREP([[public abstract class YYParser]])

AT_CHECK_JAVA_MINIMAL([[
%define public
%define final]])
AT_CHECK_JAVA_GREP([[public final class YYParser]])

AT_CHECK_JAVA_MINIMAL([[
%define public
%define strictfp]])
AT_CHECK_JAVA_GREP([[public strictfp class YYParser]])

AT_CHECK_JAVA_MINIMAL([[
%define public
%define abstract
%define strictfp]])
AT_CHECK_JAVA_GREP([[public abstract strictfp class YYParser]])

AT_CHECK_JAVA_MINIMAL([[
%define public
%define final
%define strictfp]])
AT_CHECK_JAVA_GREP([[public final strictfp class YYParser]])

AT_CLEANUP


# ---------------------------------------- #
# Java parser class extends and implements #
# ---------------------------------------- #

AT_SETUP([Java parser class extends and implements])

AT_CHECK_JAVA_MINIMAL([[%define extends "Thread"]])
AT_CHECK_JAVA_GREP([[class YYParser extends Thread]])

AT_CHECK_JAVA_MINIMAL([[%define implements "Cloneable"]])
AT_CHECK_JAVA_GREP([[class YYParser implements Cloneable]])

AT_CHECK_JAVA_MINIMAL([[
%define extends "Thread"
%define implements "Cloneable"]])
AT_CHECK_JAVA_GREP([[class YYParser extends Thread implements Cloneable]])

AT_CLEANUP


# -------------------------------- #
# Java %parse-param and %lex-param #
# -------------------------------- #

AT_SETUP([Java %parse-param and %lex-param])

AT_CHECK_JAVA_MINIMAL([])
AT_CHECK_JAVA_GREP([[ *public YYParser (Lexer yylexer) {]])

AT_CHECK_JAVA_MINIMAL([[%parse-param {int parse_param1}]])
AT_CHECK_JAVA_GREP([[ *protected final int parse_param1;]])
AT_CHECK_JAVA_GREP([[ *public YYParser (Lexer yylexer, *int parse_param1) {]])
AT_CHECK_JAVA_GREP([[[	 ]*this.parse_param1 = parse_param1;]])

AT_CHECK_JAVA_MINIMAL([[
%parse-param {int parse_param1}
%parse-param {long parse_param2}]])
AT_CHECK_JAVA_GREP([[ *protected final int parse_param1;]])
AT_CHECK_JAVA_GREP([[ *protected final long parse_param2;]])
AT_CHECK_JAVA_GREP([[ *public YYParser (Lexer yylexer, *int parse_param1, *long parse_param2) {]])
AT_CHECK_JAVA_GREP([[[	 ]*this.parse_param1 = parse_param1;]])
AT_CHECK_JAVA_GREP([[[	 ]*this.parse_param2 = parse_param2;]])

AT_CHECK_JAVA_MINIMAL_W_LEXER([], [], [[return EOF;]])
AT_CHECK_JAVA_GREP([[ *public YYParser () {]])
AT_CHECK_JAVA_GREP([[ *protected YYParser (Lexer yylexer) {]])

AT_CHECK_JAVA_MINIMAL_W_LEXER([[%parse-param {int parse_param1}]],
	[], [[return EOF;]])
AT_CHECK_JAVA_GREP([[ *protected final int parse_param1;]])
AT_CHECK_JAVA_GREP([[ *public YYParser (int parse_param1) {]])
AT_CHECK_JAVA_GREP([[ *protected YYParser (Lexer yylexer, *int parse_param1) {]])
AT_CHECK_JAVA_GREP([[[	 ]*this.parse_param1 = parse_param1;]], [2])

AT_CHECK_JAVA_MINIMAL_W_LEXER([[
%parse-param {int parse_param1}
%parse-param {long parse_param2}]],
	[], [[return EOF;]])
AT_CHECK_JAVA_GREP([[ *protected final int parse_param1;]])
AT_CHECK_JAVA_GREP([[ *protected final long parse_param2;]])
AT_CHECK_JAVA_GREP([[ *public YYParser (int parse_param1, *long parse_param2) {]])
AT_CHECK_JAVA_GREP([[ *protected YYParser (Lexer yylexer, *int parse_param1, *long parse_param2) {]])
AT_CHECK_JAVA_GREP([[[	 ]*this.parse_param1 = parse_param1;]], [2])
AT_CHECK_JAVA_GREP([[[	 ]*this.parse_param2 = parse_param2;]], [2])

AT_CHECK_JAVA_MINIMAL_W_LEXER([[%lex-param {char lex_param1}]],
	[], [[return EOF;]], [[YYLexer (char lex_param1) {}]])
AT_CHECK_JAVA_GREP([[ *public YYParser (char lex_param1) {]])
AT_CHECK_JAVA_GREP([[.* = new YYLexer *(lex_param1);]])

AT_CHECK_JAVA_MINIMAL_W_LEXER([[
%lex-param {char lex_param1}
%lex-param {short lex_param2}]],
	[], [[return EOF;]], [[YYLexer (char lex_param1, short lex_param2) {}]])
AT_CHECK_JAVA_GREP([[ *public YYParser (char lex_param1, *short lex_param2) {]])
AT_CHECK_JAVA_GREP([[.* = new YYLexer *(lex_param1, *lex_param2);]])

AT_CHECK_JAVA_MINIMAL_W_LEXER([[
%parse-param {int parse_param1}
%parse-param {long parse_param2}
%lex-param {char lex_param1}
%lex-param {short lex_param2}]],
	[], [[return EOF;]], [[YYLexer (char lex_param1, short lex_param2) {}]])
AT_CHECK_JAVA_GREP([[ *protected final int parse_param1;]])
AT_CHECK_JAVA_GREP([[ *protected final long parse_param2;]])
AT_CHECK_JAVA_GREP([[ *public YYParser (char lex_param1, *short lex_param2, *int parse_param1, *long parse_param2) {]])
AT_CHECK_JAVA_GREP([[.* = new YYLexer *(lex_param1, *lex_param2);]])
AT_CHECK_JAVA_GREP([[ *protected YYParser (Lexer yylexer, *int parse_param1, *long parse_param2) {]])
AT_CHECK_JAVA_GREP([[[	 ]*this.parse_param1 = parse_param1;]], [2])
AT_CHECK_JAVA_GREP([[[	 ]*this.parse_param2 = parse_param2;]], [2])

AT_CLEANUP


# ------------------------- #
# Java throw specifications #
# ------------------------- #

AT_SETUP([Java throws specifications])

# %define throws	- 0 1 2
# %define lex-throws	- 0 1 2
# %code lexer		  0 1

m4_define([AT_JT_lex_throws_define], [m4_case(AT_JT_lex_throws,
	-1, [],
	 0, [[%define lex_throws ""]],
	 1, [[%define lex_throws "InterruptedException"]],
	 2, [[%define lex_throws "InterruptedException, IllegalAccessException"]])])

m4_define([AT_JT_yylex_throws], [m4_case(AT_JT_lex_throws,
	-1, [[ throws java.io.IOException]],
	 0, [],
	 1, [[ throws InterruptedException]],
	 2, [[ throws InterruptedException, IllegalAccessException]])])

m4_define([AT_JT_yylex_action], [m4_case(AT_JT_lex_throws,
	-1, [[throw new java.io.IOException();]],
	 0, [[return EOF;]],
	 1, [[throw new InterruptedException();]],
	 2, [[throw new IllegalAccessException();]])])


m4_define([AT_JT_throws_define], [m4_case(AT_JT_throws,
	-1, [],
	 0, [[%define throws ""]],
	 1, [[%define throws "ClassNotFoundException"]],
	 2, [[%define throws "ClassNotFoundException, InstantiationException"]])])

m4_define([AT_JT_yyaction_throws], [m4_case(AT_JT_throws,
	-1, [],
	 0, [],
	 1, [[ throws ClassNotFoundException]],
	 2, [[ throws ClassNotFoundException, InstantiationException]])])

m4_define([AT_JT_parse_throws_2], [m4_case(AT_JT_throws,
	-1, [],
	 0, [],
	 1, [[, ClassNotFoundException]],
	 2, [[, ClassNotFoundException, InstantiationException]])])

m4_define([AT_JT_parse_throws],
	[m4_if(m4_quote(AT_JT_yylex_throws), [],
		[AT_JT_yyaction_throws],
		[AT_JT_yylex_throws[]AT_JT_parse_throws_2])])

m4_define([AT_JT_initial_action], [m4_case(AT_JT_throws,
	-1, [],
	 0, [],
	 1, [[%initial-action {if (true) throw new ClassNotFoundException();}]],
	 2, [[%initial-action {if (true) throw new InstantiationException();}]])])

m4_define([AT_JT_parse_action], [m4_case(AT_JT_throws,
	-1, [],
	 0, [],
	 1, [[throw new ClassNotFoundException();]],
	 2, [[throw new ClassNotFoundException();]])])

m4_for([AT_JT_lexer], 0, 1, 1,
  [m4_for([AT_JT_lex_throws], -1, 2, 1,
    [m4_for([AT_JT_throws], -1, 2, 1,
      [m4_if(AT_JT_lexer, 0,
	[AT_CHECK_JAVA_MINIMAL([
AT_JT_throws_define
AT_JT_lex_throws_define
AT_JT_initial_action],
[AT_JT_parse_action])],
	[AT_CHECK_JAVA_MINIMAL_W_LEXER([
AT_JT_throws_define
AT_JT_lex_throws_define
AT_JT_initial_action],
[AT_JT_yylex_throws],
[AT_JT_yylex_action],
[],
[AT_JT_parse_action])])
AT_CHECK_JAVA_GREP([[ *int yylex ()]AT_JT_yylex_throws *[;]])
AT_CHECK_JAVA_GREP([[ *private int yyaction ([^)]*)]AT_JT_yyaction_throws[ *]])
AT_CHECK_JAVA_GREP([[ *public boolean parse ()]AT_JT_parse_throws[ *]])
])])])

AT_CLEANUP


# --------------------------------------------- #
# Java stype, position_class and location_class #
# --------------------------------------------- #

AT_SETUP([Java stype, position_class and location_class])

AT_CHECK_JAVA_MINIMAL([[
%define stype "java.awt.Color"
%type<java.awt.Color> start;
%define location_type "MyLoc"
%define position_type "MyPos"
%code { class MyPos {} }]], [[$$ = $<java.awt.Color>1;]], [[MyPos]])
AT_CHECK([[grep 'java.awt.Color' YYParser.java]], [0], [ignore])
AT_CHECK([[$EGREP -v ' */?\*' YYParser.java | grep 'Position']], [1], [ignore])
AT_CHECK([[$EGREP -v ' */?\*' YYParser.java | grep 'Location']], [1], [ignore])

AT_CHECK_JAVA_MINIMAL_W_LEXER([[
%define stype "java.awt.Color"
%type<java.awt.Color> start;
%define location_type "MyLoc"
%define position_type "MyPos"
%code { class MyPos {} }]], [], [[return EOF;]], [],
[[$$ = $<java.awt.Color>1;]],
[[java.awt.Color]], [[MyPos]], [[MyLoc]])
AT_CHECK([[grep 'java.awt.Color' YYParser.java]], [0], [ignore])
AT_CHECK([[$EGREP -v ' */?\*' YYParser.java | grep 'Position']], [1], [ignore])
AT_CHECK([[$EGREP -v ' */?\*' YYParser.java | grep 'Location']], [1], [ignore])

AT_CLEANUP


# ----------------------------------------------- #
# Java syntax error handling without error token. #
# ----------------------------------------------- #

AT_SETUP([Java syntax error handling without error token])

AT_DATA([[YYParser.y]], [[%language "Java"

%lex-param { String s }

%code imports {
  import java.io.IOException;
}

%code lexer {
  String Input;
  int Position;

  public YYLexer (String s)
  {
    Input    = s;
    Position = 0;
  }

  public void yyerror (String s)
  {
    System.err.println (s);
  }

  public Object getLVal ()
  {
    return null;
  }

  public int yylex () throws IOException
  {
    if (Position >= Input.length ())
      return EOF;
    else
      return Input.charAt (Position++);
  }
}

%code {
  public static void main (String args []) throws IOException
  {
    YYParser p = new YYParser (args [0]);
    p.parse ();
  }
}
%%
input:
  'a' 'a'
;
]])
AT_BISON_CHECK([[YYParser.y]])
AT_JAVA_COMPILE([[YYParser.java]])
AT_JAVA_PARSER_CHECK([[YYParser aa]], [[0]], [[]], [[]])
AT_JAVA_PARSER_CHECK([[YYParser ab]], [[0]], [[]], [[syntax error
]])
AT_JAVA_PARSER_CHECK([[YYParser ba]], [[0]], [[]], [[syntax error
]])

AT_CLEANUP