diff options
| -rw-r--r-- | src/solar.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/solar.cpp b/src/solar.cpp index e0fbba0..c022a6d 100644 --- a/src/solar.cpp +++ b/src/solar.cpp @@ -74,11 +74,16 @@ bool read_grammar(const char *filename, parser_state_t *state) { } -int main() { +int main(int argc, char *argv[]) { using namespace solar; + if (argc < 2) { + std::fprintf(stderr, "Usage: solar FILE\n"); + return 1; + } + parser_state_t state; - if (!read_grammar("grammar.y", &state)) + if (!read_grammar(argv[1], &state)) return 1; generator_t generator(state.get_rules()); |