Check that variable references refer do declared variables

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

diff --git a/source/glsl/validate.cpp b/source/glsl/validate.cpp
index 6d0f8e51ac2cb9a95ee94883f8a7449f0c97fa44..6f0869ea141897813c4e4f3190a81082457ceed1 100644 (file)
--- a/source/glsl/validate.cpp
+++ b/source/glsl/validate.cpp
@@ -112,6 +112,32 @@ void DeclarationValidator::visit(FunctionDeclaration &func)
        TraversingVisitor::visit(func);
 }
 
+
+void ReferenceValidator::visit(VariableReference &var)
+{
+       if(!var.declaration)
+               error(var, format("Use of undeclared variable '%s'", var.name));
+       else if(stage->type!=Stage::VERTEX && var.declaration->interface=="in" && !var.declaration->linked_declaration)
+               error(var, format("Use of unlinked input variable '%s'", var.name));
+}
+
+void ReferenceValidator::visit(InterfaceBlockReference &iface)
+{
+       /* An interface block reference without a declaration should be impossible
+       since references are generated based on existing declarations. */
+       if(!iface.declaration)
+               error(iface, format("Use of undeclared interface block '%s'", iface.name));
+       else if(stage->type!=Stage::VERTEX && iface.declaration->interface=="in" && !iface.declaration->linked_block)
+               error(iface, format("Use of unlinked input block '%s'", iface.name));
+}
+
+void ReferenceValidator::visit(VariableDeclaration &var)
+{
+       if(!var.type_declaration)
+               error(var, format("Use of undeclared type '%s'", var.type));
+       TraversingVisitor::visit(var);
+}
+
 } // namespace SL
 } // namespace GL
 } // namespace Msp