private static bool CanBeAssigned(Type to, ESType esFrom, TypesAssignabilityVerificationKind verificationKind)
{
if (verificationKind == TypesAssignabilityVerificationKind.None)
{
return(true);
}
var cliTo = verificationKind == TypesAssignabilityVerificationKind.HighLevel ? ToCLIType(to) : ToLowLevelCLIType(to);
var cliFrom = verificationKind == TypesAssignabilityVerificationKind.HighLevel ? ToCLIType(esFrom) : ToLowLevelCLIType(esFrom);
var from = esFrom.ToType();
switch (cliTo)
{
case CLIType.Int32:
return(cliFrom == CLIType.Int32 || cliFrom == CLIType.NativeInt || cliFrom == CLIType.Zero);
case CLIType.NativeInt:
return(cliFrom == CLIType.Int32 || cliFrom == CLIType.NativeInt || cliFrom == CLIType.Zero);
case CLIType.Int64:
return(cliFrom == CLIType.Int64 || cliFrom == CLIType.Zero);
case CLIType.Float:
return(cliFrom == CLIType.Float || cliFrom == CLIType.Zero);
case CLIType.Struct:
return(ReflectionExtensions.Equal(to, from));
case CLIType.Pointer:
if (cliFrom == CLIType.Zero || ReflectionExtensions.Equal(to, from))
{
return(true);
}
if (cliFrom != CLIType.Pointer)
{
return(false);
}
to = to.GetElementType();
from = from.GetElementType();
return(to.IsValueType && from.IsValueType);
case CLIType.Object:
if (cliFrom == CLIType.Zero || ReflectionExtensions.Equal(to, from))
{
return(true);
}
if (cliFrom != CLIType.Object)
{
return(false);
}
var simpleESFrom = esFrom as SimpleESType;
if (simpleESFrom != null)
{
return(ReflectionExtensions.IsAssignableFrom(to, from));
}
var complexESFrom = (ComplexESType)esFrom;
return(ReflectionExtensions.IsAssignableFrom(to, complexESFrom.BaseType) || complexESFrom.Interfaces.Any(interfaCe => ReflectionExtensions.IsAssignableFrom(to, interfaCe)));
case CLIType.Zero:
return(true);
default:
throw new InvalidOperationException($"CLI type '{cliTo}' is not valid at this point");
}
}
protected static bool CanBeAssigned(Type to, Type from, TypesAssignabilityVerificationKind verificationKind)
{
return(CanBeAssigned(to, new SimpleESType(from), verificationKind));
}