group trivial "Trivial expressions"

    case float
        values { output float out0 = 5.0; }
        both ""

            precision highp float;
            ${DECLARATIONS}

            void main()
            {
                const float a = 5.0;
                out0 = a;
                ${OUTPUT}
            }
        ""
    end

    case int
        values { output int out0 = 5; }
        both ""
            precision highp float;
            ${DECLARATIONS}

            void main()
            {
                const int a = 5;
                out0 = a;
                ${OUTPUT}
            }
        ""
    end

    case bool
        values { output bool out0 = true; }
        both ""
            precision highp float;
            ${DECLARATIONS}

            void main()
            {
                const bool a = true;
                out0 = a;
                ${OUTPUT}
            }
        ""
    end

    case cast
        values { output float out0 = 1.0; }
        both ""
            precision highp float;
            ${DECLARATIONS}

            void main()
            {
                const float a = float(int(bool(true)));
                out0 = a;
                ${OUTPUT}
            }
        ""
    end

end # trivial

group operators "Operators"

    case math_float
        values { output float out0 = 2.19; }
        both ""
            precision highp float;
            ${DECLARATIONS}

            void main()
            {
                const float a = 6.0/3.5 + 1.8*2.6 - 4.2;
                out0 = a;
                ${OUTPUT}
            }
        ""
    end

    case math_vec
        values { output float out0 = 15.0; }
        both ""
            precision highp float;
            ${DECLARATIONS}

            void main()
            {
                const vec3 a = (vec4(1.0, 2.0, 3.0, 4.0).zyx * vec3(1.0, 1.5, 3.0).xyz).xzy + (vec2(5.0)/vec2(2.5)).xxy;
                out0 = a.x + a.y + a.z;
                ${OUTPUT}
            }
        ""
    end

    case math_int
        values { output int out0 = 7; }
        both ""
            precision highp int;
            ${DECLARATIONS}

            void main()
            {
                const int a = 5-1 + 2*3 - 9/3;
                out0 = a;
                ${OUTPUT}
            }
        ""
    end

    case math_ivec
        values { output int out0 = 21; }
        both ""
            precision highp int;
            ${DECLARATIONS}

            void main()
            {
                const ivec3 a = ivec2(5-1, 4).xxy + ivec4(1*3, 9/3, 1+2, 8/4).xyz;
                out0 = a.x + a.y + a.z;
                ${OUTPUT}
            }
        ""
    end

    case math_mat
        values { output float out0 = 8.0; }
        both ""
            precision highp float;
            ${DECLARATIONS}

            void main()
            {
                const mat3 a = mat3(3.0) * mat3(4.0);
                const mat4 b = mat4(a[1][1])*2.0;
                const mat2 c = mat2(b[0][0]) / 3.0;
                out0 = c[0][0]+c[1][0];
                ${OUTPUT}
            }
        ""
    end

    case logical
        values { output bool out0 = true; }
        both ""
            precision highp int;
            ${DECLARATIONS}

            void main()
            {
                const bool a = (!false || false) && (true ^^ false);
                out0 = a;
                ${OUTPUT}
            }
        ""
    end

    case compare
        values { output bool out0 = true; }
        both ""
            precision highp int;
            ${DECLARATIONS}

            void main()
            {
                const bool a = (false == false) && (true != false) && (1 < 2) && (3 <= 3) && ((1 > 1) != (1 >= 1));
                out0 = a;
                ${OUTPUT}
            }
        ""
    end

    case selection
        values { output float out0 = 5.3; }
        both ""
            precision highp float;
            ${DECLARATIONS}

            void main()
            {
                const float a = false ? 0.0 : (true ? 5.3 : 1.0);
                out0 = a;
                ${OUTPUT}
            }
        ""
    end

end # operators

group complex_types "Arrays, structs & nested calls"

    case struct
        values { output float out0 = 260.922; }
        both ""
            precision highp float;
            ${DECLARATIONS}

            struct S
            {
                vec4 a;
                int  b;
            };

            void main()
            {
                const S s = S(vec4(1.5), 123);
                out0 = length(s.a.xy)*float(s.b);
                ${OUTPUT}
            }
        ""
    end

    case nested_struct
        values { output float out0 = 965.9; }
        both ""
            precision highp float;
            ${DECLARATIONS}

            struct S
            {
                vec4 v;
                int  i;
            };

            struct T
            {
                S s;
                bool b;
                int i;
            };

            struct U
            {
                S s;
                T t;
            };

            void main()
            {
                const S s = S(vec4(1.5), 123);
                const T t = T(s, false, 3);
                const U u = U(s, t);
                const U v = U(S(vec4(1.3), 4), T(S(vec4(2.0), 5), true, 6));
                out0 = float(u.s.i*v.t.i + v.t.s.i)*v.s.v.x; // float(123*6 + 5)*1.3
                ${OUTPUT}
            }
        ""
    end

    case array
        values
        {
            input float in0 = [ 0.0 | 1.0];
            output float out0 = [0.0 | 1.0];
        }
        both ""
            precision highp float;
            ${DECLARATIONS}

            void main()
            {
                float a[int(max(-1.0, 2.0))];
                a[0] = -1.0;
                a[1] = in0;
                out0 = a[int(min(1.0, 2.0))];
                ${OUTPUT}
            }
        ""
    end

    case nested_builtin_funcs
        values { output float out0 = 3.05; }
        both ""
            precision highp float;
            ${DECLARATIONS}

            void main()
            {
                const float a = sqrt( atan(sin(1.5)/cos(1.5)) /*1.5*/ * log2(exp2(log(exp(6.2) + 0.1)) + 0.1) /*~6.2*/);
                out0 = a;
                ${OUTPUT}
            }
        ""
    end

end # complex_types