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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Text;
using Internal.TypeSystem;
namespace Internal.JitInterface
{
// This is a very rough equivalent of typestring.cpp in the CLR.
// There's way more rules to capture. Hopefully, we'll only ever need this in the code to recognize SIMD intrisics
// and we won't need to replicate all the details around escaping and such.
internal class TypeString : TypeNameFormatter
{
public static TypeString Instance { get; } = new TypeString();
public override void AppendName(StringBuilder sb, PointerType type)
{
AppendName(sb, type.ParameterType);
sb.Append('*');
}
public override void AppendName(StringBuilder sb, GenericParameterDesc type)
{
string prefix = type.Kind == GenericParameterKind.Type ? "!" : "!!";
sb.Append(prefix);
sb.Append(type.Name);
}
public override void AppendName(StringBuilder sb, SignatureTypeVariable type)
{
sb.Append("!");
sb.Append(type.Index);
}
public override void AppendName(StringBuilder sb, SignatureMethodVariable type)
{
sb.Append("!!");
sb.Append(type.Index);
}
public override void AppendName(StringBuilder sb, FunctionPointerType type)
{
MethodSignature signature = type.Signature;
AppendName(sb, signature.ReturnType);
sb.Append(" (");
for (int i = 0; i < signature.Length; i++)
{
if (i > 0)
sb.Append(", ");
AppendName(sb, signature[i]);
}
sb.Append(')');
}
public override void AppendName(StringBuilder sb, ByRefType type)
{
AppendName(sb, type.ParameterType);
sb.Append("&");
}
public override void AppendName(StringBuilder sb, ArrayType type)
{
AppendName(sb, type.ElementType);
sb.Append('[');
int rank = type.Rank;
if (rank == 1 && type.IsMdArray)
sb.Append('*');
else
sb.Append(',', type.Rank - 1);
sb.Append(']');
}
protected override void AppendNameForInstantiatedType(StringBuilder sb, DefType type)
{
AppendName(sb, type.GetTypeDefinition());
sb.Append('[');
for (int i = 0; i < type.Instantiation.Length; i++)
{
if (i > 0)
sb.Append(", ");
AppendName(sb, type.Instantiation[i]);
}
sb.Append(']');
}
protected override void AppendNameForNamespaceType(StringBuilder sb, DefType type)
{
string ns = type.Namespace;
if (ns.Length > 0)
{
sb.Append(ns);
sb.Append('.');
}
sb.Append(type.Name);
}
protected override void AppendNameForNestedType(StringBuilder sb, DefType nestedType, DefType containingType)
{
AppendName(sb, containingType);
sb.Append('+');
sb.Append(nestedType.Name);
}
}
}
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