Update 2024-03-21-setjmp-plus-longjmp-equals-goto-but-awesome.md

Author: MyNameIsTrez

_posts/2024-03-21-setjmp-plus-longjmp-equals-goto-but-awesome.md

@@ -137,9 +137,21 @@ int main() {
 
 Compiling and running this program with `gcc foo.c && ./a.out` [on godbolt.org](https://godbolt.org/z/3P9j59d15) prints `foo` to stdout, then prints `The value of 42 was bigger than expected!` to stderr, and then exits with `EXIT_FAILURE`.
 
-And this is how grug finally uses `snprintf()` and `longjmp()` to throw a formatted error message in a few dozen spots:
+Although I dislike C's macros, `grug.c` is over 9k lines long and has over 400 spots where it needs to do throw if an error fails, so this is roughly what it uses:
 
 ```bettercpp
+#define grug_error(...) {\
+	snprintf(error_msg, sizeof(error_msg), __VA_ARGS__);\
+	error_line_number = __LINE__;\
+	longjmp(error_jmp_buffer, 1);\
+}
+
+#define grug_assert(condition, ...) {\
+	if (!(condition)) {\
+		grug_error(__VA_ARGS__);\
+	}\
+}
+
 struct token peek_token(size_t token_index) {
     grug_assert(token_index < tokens_size, "token_index %zu was out of bounds in peek_token()", token_index);
     return tokens[token_index];