Implement the ternary operator in GLSL

[libs/gl.git] / source / glsl / validate.cpp

diff --git a/source/glsl/validate.cpp b/source/glsl/validate.cpp
index 8805d41fadf01655f7328b60e501ce8c3a8b73d4..6e90698c97b500c5dd2edcaebd7e3f8c70e90026 100644 (file)
--- a/source/glsl/validate.cpp
+++ b/source/glsl/validate.cpp
@@ -365,6 +365,20 @@ void ExpressionValidator::visit(Assignment &assign)
        TraversingVisitor::visit(assign);
 }
 
+void ExpressionValidator::visit(TernaryExpression &ternary)
+{
+       if(ternary.condition->type)
+       {
+               BasicTypeDeclaration *basic_cond = dynamic_cast<BasicTypeDeclaration *>(ternary.condition->type);
+               if(!basic_cond || basic_cond->kind!=BasicTypeDeclaration::BOOL)
+                       error(ternary, "Ternary operator condition is not a boolean");
+               else if(!ternary.type && ternary.true_expr->type && ternary.false_expr->type)
+                       error(ternary, format("Ternary operator has incompatible types '%s' and '%s'",
+                               ternary.true_expr->type->name, ternary.false_expr->type->name));
+       }
+       TraversingVisitor::visit(ternary);
+}
+
 void ExpressionValidator::visit(VariableDeclaration &var)
 {
        if(var.init_expression && var.init_expression->type && var.type_declaration && var.init_expression->type!=var.type_declaration)