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Updated comment in SetBits.

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It now mentions that it will fail if you try to set a bit that
does not exist.
This commit is contained in:
Andrew Woloszyn 2015-11-02 15:45:29 -05:00 committed by David Neto
parent bae8851111
commit b3ae4b9422
1 changed files with 2 additions and 0 deletions
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2
include/util/bitutils.h
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@ -44,6 +44,8 @@ Dest BitwiseCast(Src source) {
// SetBits<T, First, Num> returns an integer of type <T> with bits set // SetBits<T, First, Num> returns an integer of type <T> with bits set
// for position <First> through <First + Num - 1>, counting from the least // for position <First> through <First + Num - 1>, counting from the least
// significant bit. In particular when Num == 0, no positions are set to 1. // significant bit. In particular when Num == 0, no positions are set to 1.
// A static assert will be triggered if First + Num > sizeof(T) * 8, that is,
// a bit that will not fit in the underlying type is set.
template <typename T, size_t First = 0, size_t Num = 0> template <typename T, size_t First = 0, size_t Num = 0>
struct SetBits { struct SetBits {
static_assert(First < sizeof(T) * 8, static_assert(First < sizeof(T) * 8,