1 files changed, 10 insertions, 1 deletions
diff --git a/gfx/gl/program.h b/gfx/gl/program.h
index 1a1c306..20be1aa 100644
--- a/gfx/gl/program.h
+++ b/gfx/gl/program.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include "shader.h"
+#include "shader.h" // IWYU pragma: export
 #include <glRef.h>
 #include <glad/gl.h>
 #include <glm/mat4x4.hpp>
@@ -12,6 +12,8 @@ using ProgramRef = glRef<GLuint, &glCreateProgram, &glDeleteProgram>;
 
 class Program {
 public:
+	Program() = delete;
+
 	template<typename... S> explicit Program(const S &... srcs)
 	{
 		(glAttachShader(m_program, srcs.compile()), ...);
@@ -31,6 +33,12 @@ public:
 			return location;
 		}
 
+		explicit
+		operator bool() const
+		{
+			return location >= 0;
+		}
+
 	protected:
 		GLint location;
 	};
@@ -47,6 +55,7 @@ public:
 	}
 
 protected:
+	void checkProgramError(GLuint program, GLuint flag, std::string_view errorMessage) const;
 	void use() const;
 	void linkAndValidate() const;
 	ProgramRef m_program;