better error handling

1 files changed, 12 insertions, 16 deletions

diff --git a/src/as_tokenizer.c b/src/as_tokenizer.c
index f2c3ccb..7a71707 100644
--- a/src/as_tokenizer.c
+++ b/src/as_tokenizer.c
@@ -83,12 +83,12 @@ struct result next_token_impl(struct allocator * alct, struct input_stream * s)
         if (c == '\n') {
             input_stream_next_char(s);
             *t = (struct token){.type = TK_NEWLINE, .line = s->line, .col = s->col};
-            return (struct result){.value = t, .errmsg = NULL};
+            return ok(t);
         }
         if (c == ':') {
             input_stream_next_char(s);
             *t = (struct token){.type = TK_COLON, .line = s->line, .col = s->col};
-            return (struct result){.value = t, .errmsg = NULL};
+            return ok(t);
         }
         if (c == ' ' || c == '\t') {
             input_stream_next_char(s);
@@ -105,7 +105,7 @@ struct result next_token_impl(struct allocator * alct, struct input_stream * s)
                 }
             } 
             *t = (struct token){.type = TK_ARG, .ival = ival, .line = s->line, .col = s->col};
-            return (struct result){.value = t, .errmsg = NULL};
+            return ok(t);
         }
         if (is_start_of_identifier(c)) {
             size_t line = s->line;
@@ -114,8 +114,7 @@ struct result next_token_impl(struct allocator * alct, struct input_stream * s)
             size_t i = 0;
             while (1) {
                 if (i >= 255) {
-                    errmsg = safe_sprintf(alct, "error: identifier too long\n");
-                    return (struct result){.value = NULL, .errmsg = errmsg};
+                    return err(safe_sprintf(alct, "error: identifier too long\n"));
                 }
                 input_stream_next_char(s);
                 sval[i++] = c;
@@ -127,36 +126,33 @@ struct result next_token_impl(struct allocator * alct, struct input_stream * s)
             sval[i] = '\0';
             if (isOp(sval)) {
                 *t = (struct token){.type = TK_OP, .sval = sval, .line = line, .col = col};
-                return (struct result){.value = t, .errmsg = NULL};
+                return ok(t);
             }
             *t = (struct token){.type = TK_TAG, .sval = sval, .line = line, .col = col};
-            return (struct result){.value = t, .errmsg = NULL};
+            return ok(t);
         }
-        errmsg = safe_sprintf(alct, "error: invalid character %c at line %d, col %d\n", c, s->line, s->col);
-        return (struct result){.value = NULL, .errmsg = errmsg};
+        return err(safe_sprintf(alct, "error: invalid character %c at line %d, col %d\n", c, s->line, s->col));
     }
     // end of file
     *t = (struct token){.type = TK_ENDOFFILE};
-    return (struct result){.value = t, .errmsg = NULL};
+    return ok(t);
 }
 
 struct result next_token(struct allocator * alct, struct token_stream * ts) {
     if (ts->buf != NULL) {
         struct token * t = ts->buf;
         ts->buf = NULL;
-        return (struct result){.value = t, .errmsg = NULL};
+        return ok(t);
     }
     return next_token_impl(alct, ts->s);
 }
 
 struct result peek_token(struct allocator * alct, struct token_stream * ts) {
     if (ts->buf != NULL) {
-        return (struct result){.value = ts->buf, .errmsg = NULL};
+        return ok(ts->buf);
     }
-    struct result result = next_token_impl(alct, ts->s);
-    if (result.errmsg != NULL) return result;
-    ts->buf = result.value;
-    return result;
+    ts->buf = unwrap(next_token_impl(alct, ts->s));
+    return ok(ts->buf);
 }
 
 void print_token(struct token  * t) {