/// <summary>
/// Smart emission for Call methods.
/// </summary>
/// <param name="il">Self.</param>
/// <param name="methodInfo">Static, virtual, instance method.</param>
/// <param name="funcs">List of methods to prepare parameters in stack.</param>
/// <returns>Self.</returns>
public static ILEmitter CallMethod(
this ILEmitter il,
MethodInfo methodInfo,
params ILEmitterFunc[] funcs)
{
var owner = methodInfo.DeclaringType;
if (owner == typeof(ValueType))
{
owner = methodInfo.ReflectedType; // todo: 0. test
}
if (owner == null)
{
throw new InvalidOperationException(
$"It's not expected that {methodInfo.DisplayName()} doesn't have a declaring type.");
}
if (methodInfo.IsGenericMethodDefinition)
{
throw new InvalidOperationException(
$"Generic method {methodInfo.DisplayName()} is not initialized.");
}
// if the method belongs to Enum type, them it should be called as virtual and with constrained prefix
// https://docs.microsoft.com/en-us/dotnet/api/system.reflection.emit.opcodes.constrained
//var isEnum = owner.IsAssignableFrom(typeof(Enum));
//if (isEnum) {
// Constrained(owner); // todo: 0. test
//}
return(methodInfo.IsStatic || owner.IsValueType || owner.IsSealed || !methodInfo.IsVirtual // todo: 0. test
? il.Call(methodInfo, funcs)
: il.Callvirt(methodInfo, funcs));
}