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printf: Print special error for invalid octal numbers

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(tbh these were always a mistake)

See #9035
This commit is contained in:
Fabian Boehm 2022-06-23 18:12:13 +02:00
parent d6d2c9cd1e
commit 13a9f6b64e
2 changed files with 30 additions and 0 deletions
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6
src/builtins/printf.cpp
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@ -169,6 +169,12 @@ void builtin_printf_state_t::verify_numeric(const wchar_t *s, const wchar_t *end
} else {
// This isn't entirely fatal - the value should still be printed.
this->nonfatal_error(_(L"%ls: value not completely converted (can't convert '%ls')"), s, end);
// Warn about octal numbers as they can be confusing.
// Do it if the unconverted digit is a valid hex digit,
// because it could also be an "0x" -> "0" typo.
if (*s == L'0' && iswxdigit(*end)) {
this->nonfatal_error(_(L"Hint: a leading '0' without an 'x' indicates an octal number"), s, end);
}
}
}
}

24
tests/checks/printf.fish
View file

@ -95,3 +95,27 @@ printf '%d\n' 15.1
# CHECKERR: 15.1: value not completely converted (can't convert '.1')
echo $status
# CHECK: 1
printf '%d\n' 07
# CHECK: 7
echo $status
# CHECK: 0
printf '%d\n' 08
# CHECK: 0
# CHECKERR: 08: value not completely converted (can't convert '8')
# CHECKERR: Hint: a leading '0' without an 'x' indicates an octal number
echo $status
# CHECK: 1
printf '%d\n' 0f
# CHECK: 0
# CHECKERR: 0f: value not completely converted (can't convert 'f')
# CHECKERR: Hint: a leading '0' without an 'x' indicates an octal number
echo $status
# CHECK: 1
printf '%d\n' 0g
# CHECK: 0
# CHECKERR: 0g: value not completely converted (can't convert 'g')
echo $status
# CHECK: 1