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Java: Fix syntax error handling without error token.

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* data/lalr1.java (YYParser::parse): Here.
* tests/java.at: Add test case.
This commit is contained in:
Tim Landscheidt
2012-02-12 01:29:41 +00:00
committed by Akim Demaille
parent bbaf618c3e
commit e34e97bcd7
2 changed files with 67 additions and 1 deletions
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2
data/lalr1.java
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@@ -642,7 +642,7 @@ m4_popdef([b4_at_dollar])])dnl
}
/* Pop the current state because it cannot handle the error token. */
if (yystack.height == 1)
if (yystack.height == 0)
return false;
]b4_locations_if([yyerrloc = yystack.locationAt (0);])[

66
tests/java.at
View File

@@ -749,3 +749,69 @@ 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