Spark.Emit.HLSL.EmitContextHLSL.EmitExpImpl C# (CSharp) Method

        private EmitValHLSL EmitExpImpl(MidBuiltinApp app, Span span)
        {
            var template = app.Decl.GetTemplate("hlsl");

            switch (template)
            {
                case "__ConstantRef":
                    return EmitConstantRef(app.Args.First(), span);
                case "__UniformRef":
                    return EmitUniformRef(app.Args.First(), span);
                default:
                    break;
            }

            var args = (from a in app.Args
                        select EmitBuiltinAppArg(a, span)).ToArray();

            switch (template)
            {
                case "__GetElem":
                    return GetElem(
                        args[0],
                        args[1]);
                default:
                    break;
            }

            var resultType = EmitType(app.Type);

            var resultString = string.Format(template, args);

            if (resultType is VoidTypeHLSL)
            {
                span.WriteLine("{0};", resultString);
                return VoidVal;
            }

            if (!(resultType is RealTypeHLSL))
            {
                Diagnostics.Add(
                    Severity.Error,
                    new SourceRange(),
                    "Invalid return type for HLSL builtin function '{0}'", app.Decl.Name);
                return new ErrorValHLSL();
            }

            return new SimpleValHLSL(
                resultString,
                (RealTypeHLSL) resultType);
        }