From e5067964adcb792b7c9dbddbdcfe4d9b94079597 Mon Sep 17 00:00:00 2001
From: Derek Mauro <dmauro@google.com>
Date: Mon, 20 Mar 2023 12:18:53 -0700
Subject: Fix an implicit truncation warning under MSVC 32-bit

Since the return value of `NumBits()` will always fit into `size_t`,
use an explicit cast to silence the implicit conversion warning.

Fixes #1384

PiperOrigin-RevId: 518041598
Change-Id: If2f2456db4b27b78e9ea9e026dce610953bd5bfb
---
 absl/random/internal/fast_uniform_bits.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'absl/random')

diff --git a/absl/random/internal/fast_uniform_bits.h b/absl/random/internal/fast_uniform_bits.h
index 8d8ed045..83ee5c0f 100644
--- a/absl/random/internal/fast_uniform_bits.h
+++ b/absl/random/internal/fast_uniform_bits.h
@@ -57,9 +57,10 @@ constexpr UIntType IntegerLog2(UIntType n) {
 // `PowerOfTwoVariate(urbg)`.
 template <typename URBG>
 constexpr size_t NumBits() {
-  return RangeSize<URBG>() == 0
-             ? std::numeric_limits<typename URBG::result_type>::digits
-             : IntegerLog2(RangeSize<URBG>());
+  return static_cast<size_t>(
+      RangeSize<URBG>() == 0
+          ? std::numeric_limits<typename URBG::result_type>::digits
+          : IntegerLog2(RangeSize<URBG>()));
 }
 
 // Given a shift value `n`, constructs a mask with exactly the low `n` bits set.
-- 
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