The hexfloat parser for binary32/64 added in r12-6645-gcc3bf3404e4b1c
overlooked that the exponent part can also begin with an uppercase 'P'.
Tested on x86_64-pc-linux-gnu, does this look OK for trunk/11, and possibly the
12 branch now for 12.1?
PR libstdc++/105441
libstdc++-v3/ChangeLog:
* src/c++17/floating_from_chars.cc (__floating_from_chars_hex):
Also accept 'P' as the start of the exponent.
* testsuite/20_util/from_chars/7.cc: Add corresponding testcase.
---
libstdc++-v3/src/c++17/floating_from_chars.cc | 2 +-
libstdc++-v3/testsuite/20_util/from_chars/7.cc | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/src/c++17/floating_from_chars.cc
b/libstdc++-v3/src/c++17/floating_from_chars.cc
index 13de1e346ab..e7f3a58cf18 100644
--- a/libstdc++-v3/src/c++17/floating_from_chars.cc
+++ b/libstdc++-v3/src/c++17/floating_from_chars.cc
@@ -664,7 +664,7 @@ namespace
// Parse the written exponent.
int written_exponent = 0;
- if (first != last && *first == 'p')
+ if (first != last && (*first == 'p' || *first == 'P'))
{
// Tentatively consume the 'p' and try to parse a decimal number.
const char* const fallback_first = first;
diff --git a/libstdc++-v3/testsuite/20_util/from_chars/7.cc
b/libstdc++-v3/testsuite/20_util/from_chars/7.cc
index 2a78c7441e2..1aa9b230531 100644
--- a/libstdc++-v3/testsuite/20_util/from_chars/7.cc
+++ b/libstdc++-v3/testsuite/20_util/from_chars/7.cc
@@ -96,6 +96,7 @@ constexpr testcase testcases[] = {
{ "1p-1", 4, {}, 0x1p-1 },
{ "0", 1, {}, 0.0 },
{ "A", 1, {}, 0xA },
+ { "1.ABCDEFP+10", 12, {}, 0x1.ABCDEFP+10 },
{ "-1", 2, {}, -1.0 },
{ "-0", 2, {}, -0.0 },
{ "42", 2, {}, 0x42p0 },
--
2.36.0.44.g0f828332d5
