### Compilation failed:

error: 11: no match for shader::eval(float2, half4)
error: 12: no match for shader::eval(half4)
error: 13: no match for shader::eval(half4, float2)
error: 14: no match for shader::eval()
error: 15: no match for shader::eval(float3x3)
error: 16: type mismatch: ',' cannot operate on 'int', 'shader'
error: 18: no match for colorFilter::eval()
error: 19: no match for colorFilter::eval(float2)
error: 20: no match for colorFilter::eval(float2, half4)
error: 21: type mismatch: ',' cannot operate on 'shader', 'colorFilter'
error: 23: no match for blender::eval()
error: 24: no match for blender::eval(half4)
error: 25: no match for blender::eval(float2)
error: 26: no match for blender::eval(float2, half4)
error: 27: type mismatch: ',' cannot operate on 'blender', 'blender'
15 errors