public override int GetHashCode()
{
if (mHashCodeCache != null)
{
return(mHashCodeCache.Value);
}
int res;
if (this.IsTemporaryVar)
{
// 5th bit from the top set
res = (int)this.TemporaryVarOrMVarIndex + 1;
}
else if (this.IsTemporaryMVar)
{
// Allow support for up to 256 generic type parameters before
// hash collisions occur.
res = (int)((this.TemporaryVarOrMVarIndex + 1) << 8);
}
else if (IsPointerType)
{
// 3rd bit from the top set
res = PointerType.GetHashCode() | unchecked ((int)0x20000000);
}
else if (IsArrayType)
{
// 2nd bit from the top set
res = ArrayType.GetHashCode() | unchecked ((int)0x40000000);
}
else
{
// The OR at the end is to ensure that this hash code can never conflict with
// any of the above.
// Top bit set
res = Namespace.GetHashCode() ^ Name.GetHashCode() ^ GenericParameters.GetHashCode() | unchecked ((int)0x80000000);
}
mHashCodeCache = res;
return(mHashCodeCache.Value);
}
