Strange ShaderLab Syntax Error

Questions & Answers
1

Today I decided to learn how to write shaders, so I started with this simple shader.

Shader "Unity Test/Diffuse" {
	SubShader 
	{
		Tags { "RenderType" = "Opaque" }
		
		CGPROGRAM
		#pragma surface surf Lambert
		struct input
		{
			float4 color : COLOR;
		};
		
		void surf (Input IN, inout SurfaceOutput o)
		{
			o.Albedo = IN.color;
		}
		ENDCG
	}
	
	Fallback "Diffuse"
}

However, Unity tells me that there is a syntax error on line 14. I have not seen the reason why. Can anyone help?

2

a.) Debugging shader code can be hard, as the error messages are often unhelpful and refer to different line numbers than the true error.

b.) Look at lines 8 and 13. “Input” or “input”?