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Overview
Comment:Add a simple test case for Lemon. Always include assert.h in the Lemon-generated parser.
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SHA3-256: 9c9c46dcbe92aeabe3d5675bb69681b6dfd53798bc67e6a2ceba67ed3c4fb0af
User & Date: drh 2018-11-27 14:34:33
Context
2018-11-27
14:41
Remove the sqlite3PagerUseWal() routine which was made obsolete by the [81629ba91475938b6ad] change. check-in: 4331b499 user: drh tags: trunk
14:34
Add a simple test case for Lemon. Always include assert.h in the Lemon-generated parser. check-in: 9c9c46dc user: drh tags: trunk
14:03
Fix to the error handling logic in the Lemon parser template. This does not affect SQLite since SQLite does not use that part of the Lemon parser template. check-in: c6dfc59e user: drh tags: trunk
Changes
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Changes to doc/lemon.html.

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<p><pre>
   %include {#include &lt;unistd.h&gt;}
</pre></p>

<p>This might be needed, for example, if some of the C actions in the
grammar call functions that are prototyped in unistd.h.</p>




<a name='pleft'></a>
<h4>The <tt>%left</tt> directive</h4>

The <tt>%left</tt> directive is used (along with the
<tt><a href='#pright'>%right</a></tt> and
<tt><a href='#pnonassoc'>%nonassoc</a></tt> directives) to declare







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<p><pre>
   %include {#include &lt;unistd.h&gt;}
</pre></p>

<p>This might be needed, for example, if some of the C actions in the
grammar call functions that are prototyped in unistd.h.</p>

<p>Use the <tt><a href="#pcode">%code</a></tt> directive to add code to
the end of the generated parser.</p>

<a name='pleft'></a>
<h4>The <tt>%left</tt> directive</h4>

The <tt>%left</tt> directive is used (along with the
<tt><a href='#pright'>%right</a></tt> and
<tt><a href='#pnonassoc'>%nonassoc</a></tt> directives) to declare

Added test/lemon-test01.y.























































































































































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// A test case for the LEMON parser generator.  Run as follows:
//
//     lemon lemon-test01.y && gcc -g lemon-test01.c && ./a.out
//
%token_prefix TK_
%token_type   int
%default_type int
%include {
  static int nSyntaxError = 0;
  static int nAccept = 0;
  static int nFailure = 0;
}

all ::=  A B.
all ::=  error B.

%syntax_error {
  nSyntaxError++;
}
%parse_accept {
  nAccept++;
}
%parse_failure {
  nFailure++;
}
%code {
  #include <assert.h>
  #include "lemon-test01.h"
  static int nTest = 0;
  static int nErr = 0;
  static int testCase(int testId, int shouldBe, int actual){
    nTest++;
    if( shouldBe==actual ){
      printf("test %d: ok\n", testId);
    }else{
      printf("test %d: got %d, expected %d\n", testId, actual, shouldBe);
      nErr++;
    }
  }
  int main(int argc, char **argv){
    yyParser xp;
    ParseInit(&xp);
    Parse(&xp, TK_A, 0);
    Parse(&xp, TK_B, 0);
    Parse(&xp, 0, 0);
    ParseFinalize(&xp);
    testCase(100, 0, nSyntaxError);
    testCase(110, 1, nAccept);
    testCase(120, 0, nFailure);
    nSyntaxError = nAccept = nFailure = 0;
    ParseInit(&xp);
    Parse(&xp, TK_B, 0);
    Parse(&xp, TK_B, 0);
    Parse(&xp, 0, 0);
    ParseFinalize(&xp);
    testCase(200, 1, nSyntaxError);
    testCase(210, 1, nAccept);
    testCase(220, 0, nFailure);
    nSyntaxError = nAccept = nFailure = 0;
    ParseInit(&xp);
    Parse(&xp, TK_A, 0);
    Parse(&xp, TK_A, 0);
    Parse(&xp, 0, 0);
    ParseFinalize(&xp);
    testCase(200, 1, nSyntaxError);
    testCase(210, 0, nAccept);
    testCase(220, 0, nFailure);
    if( nErr==0 ){
      printf("%d tests pass\n", nTest);
    }else{
      printf("%d errors out %d tests\n", nErr, nTest);
    }
    return nErr;
  }
}

Changes to tool/lempar.c.

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** of this template is copied straight through into the generate parser
** source file.
**
** The following is the concatenation of all %include directives from the
** input grammar file:
*/
#include <stdio.h>

/************ Begin %include sections from the grammar ************************/
%%
/**************** End of %include directives **********************************/
/* These constants specify the various numeric values for terminal symbols
** in a format understandable to "makeheaders".  This section is blank unless
** "lemon" is run with the "-m" command-line option.
***************** Begin makeheaders token definitions *************************/







>







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** of this template is copied straight through into the generate parser
** source file.
**
** The following is the concatenation of all %include directives from the
** input grammar file:
*/
#include <stdio.h>
#include <assert.h>
/************ Begin %include sections from the grammar ************************/
%%
/**************** End of %include directives **********************************/
/* These constants specify the various numeric values for terminal symbols
** in a format understandable to "makeheaders".  This section is blank unless
** "lemon" is run with the "-m" command-line option.
***************** Begin makeheaders token definitions *************************/