From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 5 Mar 2021 22:33:44 +0000 (+0200)
Subject: Ignore precedence for prefix operators
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;ds=sidebyside;h=e8542d921a07b7391d558cb3349a68f26675f797;p=libs%2Fgl.git

Ignore precedence for prefix operators

Since the operator appears at the start of an expression or after another
operator, there's no way for it to bind to anything but whatever follows.
This fixes a bug where chained prefix operators were not recognized.
---

diff --git a/source/glsl/parser.cpp b/source/glsl/parser.cpp
index c924606f..d2261126 100644
--- a/source/glsl/parser.cpp
+++ b/source/glsl/parser.cpp
@@ -447,7 +447,8 @@ RefPtr<Expression> Parser::parse_expression(unsigned precedence)
 			if(token==i->token && (!left || i->type!=Operator::PREFIX) && (left || i->type!=Operator::POSTFIX))
 				oper = i;
 
-		if(token==";" || token==")" || token=="]" || token=="," || (oper && precedence && oper->precedence>=precedence))
+		bool lower_precedence = (oper && oper->type!=Operator::PREFIX && precedence && oper->precedence>=precedence);
+		if(token==";" || token==")" || token=="]" || token=="," || lower_precedence)
 		{
 			if(left)
 				return left;