diff options
| -rw-r--r-- | ell.c | 34 |
1 files changed, 34 insertions, 0 deletions
@@ -1044,6 +1044,38 @@ defn (fn_parse) { return ok; } +defn (fn_try) { + struct item *body = args, *handler; + if (!body || body->type != ITEM_LIST) + return set_error (ctx, "first argument must be a function"); + if (!(handler = body->next) || handler->type != ITEM_LIST) + return set_error (ctx, "second argument must be a function"); + if (execute (ctx, body->head, result)) + return true; + + struct item *message; + if (ctx->memory_failure + || !check (ctx, (message = new_string (ctx->error, strlen (ctx->error))))) + return false; + + free (ctx->error); ctx->error = NULL; + item_free_list (*result); *result = NULL; + + bool ok = set_single_argument (ctx, message) + && execute (ctx, handler->head, result); + item_free (message); + return ok; +} + +defn (fn_throw) { + (void) result; + + struct item *message = args; + if (!message || message->type != ITEM_STRING) + return set_error (ctx, "first argument must be string"); + return set_error (ctx, message->value); +} + defn (fn_plus) { double res = 0.0; for (; args; args = args->next) { @@ -1226,6 +1258,8 @@ init_runtime_library (struct context *ctx) { && native_register (ctx, "..", fn_concatenate) && native_register (ctx, "system", fn_system) && native_register (ctx, "parse", fn_parse) + && native_register (ctx, "try", fn_try) + && native_register (ctx, "throw", fn_throw) && native_register (ctx, "+", fn_plus) && native_register (ctx, "-", fn_minus) && native_register (ctx, "*", fn_multiply) |