Can't get this to work, even though it finds the correct assembly, it refuses to discover the attribute classes.

SPIRVJSONReader.ttinclude

<#@ assembly name="System.Runtime.Serialization"#>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Runtime.Serialization"#>
<#@ import namespace="System.Runtime.Serialization.Json"#>
<#
    var json = new DataContractJsonSerializer(typeof(SPIRVGrammar));
    var file = File.Open("spirv.core.grammar.json", FileMode.Open);

    var grammar = (SPIRVGrammar) json.ReadObject(file);

    //Sanitize operand names
    grammar.Instructions.ForEach(op =>
        op.Operands?.ForEach(operand => operand.Name = operand.Name?.
        Replace(" ", "").
        Replace("'", "").
        Replace(".", "").
        Replace(",", "").
        Replace("+", "").
        Replace(">", "").
        Replace("<", "").
        Replace("\n", "").
        Replace("~", "").
        Replace("...", "").
        Replace("ref", "")
    ));

    //Sanitize names starting with numbers
    grammar.OperandKinds.ForEach(kind =>
        kind.Enumerants?.ForEach(e =>
            e.Name = char.IsDigit(e.Name[0]) ? "_" + e.Name : e.Name));
#>
<#+
    [DataContract]
    private class SPIRVGrammar
    {
        [DataMember(Name = "instructions")]
        public List<SPIRVOp> Instructions { get; set; }

        [DataMember(Name = "operand_kinds")]
        public List<SPIRVOperandKind> OperandKinds { get; set; }
    }

    [DataContract]
    private class SPIRVOp
    {
        [DataMember(Name = "opname")]
        public string OpName { get; set; }

        [DataMember(Name = "opcode")]
        public int OpCode { get; set; }

        [DataMember(Name = "operands")]
        public List<SPIRVOpKind> Operands { get; set; }
    }

    [DataContract]
    private class SPIRVOpKind
    {
        [DataMember(Name = "kind")]
        public string Kind { get; set; }

        [DataMember(Name = "name")]
        public string Name { get; set; }

        [DataMember(Name = "quantifier")]
        public string Quantifier { get; set; }
    }

    [DataContract]
    private class SPIRVOperandKind
    {
        [DataMember(Name = "category")]
        public string Category { get; set; }

        [DataMember(Name = "kind")]
        public string Name { get; set; }

        [DataMember(Name = "bases")]
        public List<string> Bases { get; set; }

        [DataMember(Name = "enumerants")]
        public List<SPIRVEnumerant> Enumerants { get; set; }
    }

    [DataContract]
    private class SPIRVEnumerant
    {
        [DataMember(Name = "enumerant")]
        public string Name { get; set; }

        [DataMember(Name = "value")]
        public  string Value { get; set; }
    }
#>