Fix unary postfix expressions being expected in absence of operator

This allows the expression parser to return false for non-expressions
instead of terminating the entire parsing procedure with an error,
fixing calls to functions with no parameters not being allowed.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/parse.c b/src/parse.c
index d491e4f..4b938bb 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -274,7 +274,12 @@ parse_unarypre_e(struct lexer *lexer, struct unarypre_e *out)
 		out->op = UPR_NONE;
 	}
 
-	if (!parse_unarypost_e(lexer, &out->post)) {
+	bool post_ok = parse_unarypost_e(lexer, &out->post);
+	if (!post_ok) {
+		if (out->op == UPR_NONE) {
+			return false;
+		}
+
 		error(lex_loc(lexer),
 				"syntax error: expected unary postfix expression");
 	}