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fix conflict resolution with charset productions

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This commit is contained in:
Sven M. Hallberg 2015-09-25 01:28:52 +02:00
parent c9de11c883
commit df179eba43
2 changed files with 57 additions and 27 deletions
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21
src/t_regression.c
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@ -121,13 +121,24 @@ static void test_llk_zero_end(void) {
static void test_lalr_charset_lhs(void) {
HParserBackend be = PB_LALR;
HParser *p = h_choice(h_ch('A'), h_uint8(), NULL);
HParser *p = h_many(h_choice(h_sequence(h_ch('A'), h_ch('B'), NULL),
h_in((uint8_t*)"AB",2), NULL));
// the above would fail to compile because of an unhandled case in trying
// to resolve a conflict where an item's left-hand-side was an HCF_CHARSET.
// the above would abort because of an unhandled case in trying to resolve
// a conflict where an item's left-hand-side was an HCF_CHARSET.
// however, the compile should fail - the conflict cannot be resolved.
g_check_parse_match(p, be, "A",1, "u0x41");
g_check_parse_match(p, be, "B",1, "u0x42");
if(h_compile(p, be, NULL) == 0) {
g_test_message("LALR compile didn't detect ambiguous grammar");
// it says it compiled it - well, then it should parse it!
// (this helps us see what it thinks it should be doing.)
g_check_parse_match(p, be, "AA",2, "(u0x41 u0x41)");
g_check_parse_match(p, be, "AB",2, "((u0x41 u0x42))");
g_test_fail();
return;
}
}
static void test_cfg_many_seq(void) {