fail: variables with a same name, ifdef preprocessor branching

[0b5vr]

Related: #28

Input

void main() {
#ifdef CONDITION
  vec3 col = vec3( 1.0 );
#else
  vec3 col = vec3( 0.0 );
#endif

  gl_FragColor = vec4( col, 1.0 );
}

Actual

void main(){
#ifdef CONDITION
vec3 C=vec3(1.);
#else
vec3 r=vec3(0.);
#endif
gl_FragColor=vec4(r,1.);}

Expected

void main(){
#ifdef CONDITION
vec3 C=vec3(1.);
#else
vec3 C=vec3(0.);
#endif
gl_FragColor=vec4(C,1.);}

[laurentlb]

Here, the workaround can be to declare the variable before the macro:

void main() {
  vec3 col;
#ifdef CONDITION
  col = vec3( 1.0 );
#else
  col = vec3( 0.0 );
#endif
  gl_FragColor = vec4( col, 1.0 );
}

[0b5vr]

yes I'm using that workaround right now.