public SpecializedMethod(IMethod methodDefinition, TypeParameterSubstitution substitution)
: base(methodDefinition)
{
if (substitution == null)
{
throw new ArgumentNullException("substitution");
}
this.methodDefinition = methodDefinition;
this.isParameterized = substitution.MethodTypeArguments != null;
if (methodDefinition.TypeParameters.Count > 0)
{
// The method is generic, so we need to specialize the type parameters
// (for specializing the constraints, and also to set the correct Owner)
specializedTypeParameters = new ITypeParameter[methodDefinition.TypeParameters.Count];
for (int i = 0; i < specializedTypeParameters.Length; i++)
{
specializedTypeParameters[i] = new SpecializedTypeParameter(methodDefinition.TypeParameters[i], this);
}
if (!isParameterized)
{
// Add substitution that replaces the base method's type parameters with our specialized version
// but do this only if the type parameters on the baseMember have not already been substituted
substitutionWithoutSpecializedTypeParameters = this.Substitution;
AddSubstitution(new TypeParameterSubstitution(null, specializedTypeParameters));
}
}
// Add the main substitution after the method type parameter specialization.
AddSubstitution(substitution);
if (substitutionWithoutSpecializedTypeParameters != null)
{
// If we already have a substitution without specialized type parameters, update that:
substitutionWithoutSpecializedTypeParameters = TypeParameterSubstitution.Compose(substitution, substitutionWithoutSpecializedTypeParameters);
}
else
{
// Otherwise just use the whole substitution, as that doesn't contain specialized type parameters
// in this case.
substitutionWithoutSpecializedTypeParameters = this.Substitution;
}
if (specializedTypeParameters != null)
{
// Set the substitution on the type parameters to the final composed substitution
foreach (var tp in specializedTypeParameters.OfType <SpecializedTypeParameter>())
{
if (tp.Owner == this)
{
tp.substitution = base.Substitution;
}
}
}
}
/// <summary>
/// Performs a substitution. This method may only be called by constructors in derived classes.
/// </summary>
protected void AddSubstitution(TypeParameterSubstitution newSubstitution)
{
Debug.Assert(declaringType == null);
Debug.Assert(returnType == null);
this.substitution = TypeParameterSubstitution.Compose(newSubstitution, this.substitution);
}
public virtual IMember Specialize(TypeParameterSubstitution newSubstitution)
{
return(baseMember.Specialize(TypeParameterSubstitution.Compose(newSubstitution, this.substitution)));
}
IMethod IMethod.Specialize(TypeParameterSubstitution newSubstitution)
{
return(methodDefinition.Specialize(TypeParameterSubstitution.Compose(newSubstitution, substitutionWithoutSpecializedTypeParameters)));
}