8 * Section 4.3.3 "Constant Expressions" of the OpenGL GLSL ES 3.00.4 spec
11 * "However, the sequence operator ( , ) and the assignment operators ( =,
12 * +=, ...) are not included in the operators that can create a constant
16 const float f = 3.0 + (1.0, 2.0);
20 gl_Position = vec4(f);