TypeSig SubstituteGenericParameter(TypeSig type)
{
if (genericArguments is null)
{
return(type);
}
return(genericArguments.Resolve(type));
}
private static MethodSig Resolve(MethodBaseSig method, TypeSig typeContext)
{
var args = new GenericArguments();
if (typeContext.IsGenericInstanceType)
{
args.PushTypeArgs(((GenericInstSig)typeContext).GenericArguments);
}
var retSig = new MethodSig(method.CallingConvention);
retSig.RetType = args.Resolve(method.RetType);
foreach (var param in method.Params)
{
retSig.Params.Add(args.Resolve(param));
}
return(retSig);
}
private static TypeSig Resolve(TypeSig type, TypeSig typeContext)
{
var args = new GenericArguments();
if (typeContext.IsGenericInstanceType)
{
args.PushTypeArgs(((GenericInstSig)typeContext).GenericArguments);
}
return(args.Resolve(type));
}
public static TypeSig ResolveType(this GenericArguments genericArgs, TypeSig typeSig)
{
switch (typeSig.ElementType)
{
case ElementType.Ptr:
return(new PtrSig(genericArgs.ResolveType(typeSig.Next)));
case ElementType.ByRef:
return(new ByRefSig(genericArgs.ResolveType(typeSig.Next)));
case ElementType.SZArray:
return(new SZArraySig(genericArgs.ResolveType(typeSig.Next)));
case ElementType.Array:
var arraySig = (ArraySig)typeSig;
return(new ArraySig(genericArgs.ResolveType(typeSig.Next), arraySig.Rank, arraySig.Sizes, arraySig.LowerBounds));
case ElementType.Pinned:
return(new PinnedSig(genericArgs.ResolveType(typeSig.Next)));
case ElementType.Var:
case ElementType.MVar:
return(genericArgs.Resolve(typeSig));
case ElementType.GenericInst:
var genInst = (GenericInstSig)typeSig;
var typeArgs = new List <TypeSig>();
foreach (var arg in genInst.GenericArguments)
{
typeArgs.Add(genericArgs.ResolveType(arg));
}
return(new GenericInstSig(genInst.GenericType, typeArgs));
case ElementType.CModReqd:
return(new CModReqdSig(((CModReqdSig)typeSig).Modifier, genericArgs.ResolveType(typeSig.Next)));
case ElementType.CModOpt:
return(new CModOptSig(((CModOptSig)typeSig).Modifier, genericArgs.ResolveType(typeSig.Next)));
case ElementType.ValueArray:
return(new ValueArraySig(genericArgs.ResolveType(typeSig.Next), ((ValueArraySig)typeSig).Size));
case ElementType.Module:
return(new ModuleSig(((ModuleSig)typeSig).Index, genericArgs.ResolveType(typeSig.Next)));
}
if (typeSig.IsTypeDefOrRef)
{
var s = (TypeDefOrRefSig)typeSig;
if (s.TypeDefOrRef is TypeSpec)
{
throw new NotSupportedException(); // TODO: ?
}
}
return(typeSig);
}
bool ReplaceGenericArg(ref TypeSig typeSig)
{
if (genericArguments == null)
{
return(false);
}
var newTypeSig = genericArguments.Resolve(typeSig);
if (newTypeSig != typeSig)
{
typeSig = newTypeSig;
return(true);
}
return(false);
}
private static IEnumerable <TypeSig> BaseTypes(TypeSig type)
{
TypeDef typeDef = type.ToTypeDefOrRef().ResolveTypeDefThrow();
if (typeDef.BaseType == null)
{
yield break;
}
TypeSig baseType = type;
do
{
var args = new GenericArguments();
if (baseType.IsGenericInstanceType)
{
args.PushTypeArgs(((GenericInstSig)baseType).GenericArguments);
}
baseType = args.Resolve(typeDef.BaseType.ToTypeSig());
yield return(baseType);
typeDef = typeDef.BaseType.ResolveTypeDef();
} while (typeDef != null && typeDef.BaseType != null);
}
public bool Instantiate(MethodSpec methodSpec, out MethodDef def)
{
if (instantiations.TryGetValue(methodSpec, out def))
{
return(true);
}
var genericArguments = new GenericArguments();
genericArguments.PushMethodArgs(methodSpec.GenericInstMethodSig.GenericArguments);
var originDef = methodSpec.Method.ResolveMethodDefThrow();
var newSig = ResolveMethod(originDef.MethodSig, genericArguments);
newSig.Generic = false;
newSig.GenParamCount = 0;
string newName = originDef.Name;
foreach (var typeArg in methodSpec.GenericInstMethodSig.GenericArguments)
{
newName += ";" + typeArg.TypeName;
}
def = new MethodDefUser(newName, newSig, originDef.ImplAttributes, originDef.Attributes);
var thisParam = originDef.HasThis ? originDef.Parameters[0].Type : null;
def.DeclaringType2 = originDef.DeclaringType2;
if (thisParam != null)
{
def.Parameters[0].Type = thisParam;
}
foreach (var declSec in originDef.DeclSecurities)
{
def.DeclSecurities.Add(declSec);
}
def.ImplMap = originDef.ImplMap;
foreach (var ov in originDef.Overrides)
{
def.Overrides.Add(ov);
}
def.Body = new CilBody();
def.Body.InitLocals = originDef.Body.InitLocals;
def.Body.MaxStack = originDef.Body.MaxStack;
foreach (var variable in originDef.Body.Variables)
{
var newVar = new Local(variable.Type);
def.Body.Variables.Add(newVar);
}
var instrMap = new Dictionary <Instruction, Instruction>();
foreach (var instr in originDef.Body.Instructions)
{
var newInstr = new Instruction(instr.OpCode, ResolveOperand(instr.Operand, genericArguments));
def.Body.Instructions.Add(newInstr);
instrMap[instr] = newInstr;
}
foreach (var instr in def.Body.Instructions)
{
if (instr.Operand is Instruction)
{
instr.Operand = instrMap[(Instruction)instr.Operand];
}
else if (instr.Operand is Instruction[])
{
var targets = (Instruction[])((Instruction[])instr.Operand).Clone();
for (int i = 0; i < targets.Length; i++)
{
targets[i] = instrMap[targets[i]];
}
instr.Operand = targets;
}
}
def.Body.UpdateInstructionOffsets();
foreach (var eh in originDef.Body.ExceptionHandlers)
{
var newEH = new ExceptionHandler(eh.HandlerType);
newEH.TryStart = instrMap[eh.TryStart];
newEH.HandlerStart = instrMap[eh.HandlerStart];
if (eh.TryEnd != null)
{
newEH.TryEnd = instrMap[eh.TryEnd];
}
if (eh.HandlerEnd != null)
{
newEH.HandlerEnd = instrMap[eh.HandlerEnd];
}
if (eh.CatchType != null)
{
newEH.CatchType = genericArguments.Resolve(newEH.CatchType.ToTypeSig()).ToTypeDefOrRef();
}
else if (eh.FilterStart != null)
{
newEH.FilterStart = instrMap[eh.FilterStart];
}
def.Body.ExceptionHandlers.Add(newEH);
}
instantiations[methodSpec] = def;
return(false);
}
public static GenericArguments ParseGenericArguments(string type, string path, int absoluteCharOffset)
{
GenericArguments generics = new GenericArguments();
var p = type.IndexOf('<');
System.Text.StringBuilder s = new System.Text.StringBuilder();
if (p > -1)
{
for (int i = p + 1; i < type.Length; i++)
{
var c = type[i];
switch (c)
{
case '>':
case ',':
generics.Add(s.ToString().Trim());
s.Clear();
break;
default:
s.Append(c);
break;
}
}
}
string txt = LoadText(path, absoluteCharOffset);
System.Text.RegularExpressions.MatchCollection matchs = r.Matches(txt);
foreach (System.Text.RegularExpressions.Match item in matchs)
{
string t = item.Value.Substring("where".Length).Trim();
GenericArgument gen = generics.Resolve(t);
if (gen != null)
{
t = txt.Substring(item.Index + item.Length + 1).Trim();
var m2 = r.Match(t);
if (m2.Success)
t = t.Substring(0, m2.Index);
var constraints = t.Split(',');
foreach (string constraint in constraints)
gen.AddConstraint(constraint.Trim());
}
}
return generics;
}
