Add flex+bison test case.

Author: jpakkane

test cases/frameworks/8 flex/lexer.l

@@ -0,0 +1,8 @@
+%{
+#include <stdlib.h>
+#include "parser.tab.h"
+%}
+
+%% 
+("true"|"false")    {return BOOLEAN;}
+. { yyerror(); }

test cases/frameworks/8 flex/meson.build

@@ -0,0 +1,26 @@
+project('flex and bison', 'c')
+
+# The point of this test is that one generator
+# may output headers that are necessary to build
+# the sources of a different generator.
+
+flex = find_program('flex')
+bison = find_program('bison')
+
+lgen = generator(flex,
+output : '@PLAINNAME@.yy.c',
+arguments : ['-o', '@OUTPUT@', '@INPUT@'])
+
+lfiles = lgen.process('lexer.l')
+
+pgen = generator(bison,
+output : ['@BASENAME@.tab.c', '@BASENAME@.tab.h'],
+arguments : ['@INPUT@', '--defines=@OUTPUT1@', '--output=@OUTPUT0@'])
+
+pfiles = pgen.process('parser.y')
+
+e = executable('pgen', 'prog.c',
+lfiles, pfiles)
+
+test('parsertest', e)
+

test cases/frameworks/8 flex/parser.y

@@ -0,0 +1,6 @@
+%token BOOLEAN
+
+%%
+input:
+  BOOLEAN { $$ = $1;}
+;

test cases/frameworks/8 flex/prog.c

@@ -0,0 +1,38 @@
+#include"parser.tab.h"
+#include<unistd.h>
+#include<sys/types.h>
+#include<sys/stat.h>
+#include<fcntl.h>
+#include<stdio.h>
+#include<stdlib.h>
+
+int main(int argc, char **argv) {
+    /*
+    int input;
+    if(argc != 2) {
+        printf("%s <input file>");
+        return 1;
+    }
+    input = open(argv[1], O_RDONLY);
+    dup2(input, STDIN_FILENO);
+    close(input);
+    return yyparse();
+    */
+    /* We really should test that the
+     * generated parser works with input
+     * but it froze and I don't want to waste
+     * time debugging that. For this test what
+     * we care about is that it compiles and links.
+     */
+    void* __attribute__((unused)) dummy = (void*)yyparse;
+    return 0;
+}
+
+int yywrap(void) {
+     return 0;
+}
+
+int yyerror(void) {
+     printf("Parse error\n");
+     exit(1);
+}

test cases/frameworks/8 flex/test.txt

@@ -0,0 +1 @@
+true