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use lamda function to do complex initialization with a (wanted) side-effect

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This commit is contained in:
Dennis Luxen 2015-03-30 13:01:16 +02:00
parent 6933804aa4
commit d6badca610
1 changed files with 16 additions and 8 deletions
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24
util/string_util.hpp
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@ -41,12 +41,18 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// work with negative values to prevent overflowing when taking -value
template <int length, int precision> static inline char *printInt(char *buffer, int value)
{
bool minus = true;
if (value >= 0)
{
minus = false;
value = -value;
}
static_assert(length > 0, "length must be positive");
static_assert(precision > 0, "precision must be positive");
const bool minus = [&value]{
if (value >= 0)
{
value = -value;
return false;
}
return true;
}();
buffer += length - 1;
for (int i = 0; i < precision; ++i)
{
@ -56,6 +62,7 @@ template <int length, int precision> static inline char *printInt(char *buffer,
}
*buffer = '.';
--buffer;
for (int i = precision + 1; i < length; ++i)
{
*buffer = '0' - (value % 10);
@ -66,6 +73,7 @@ template <int length, int precision> static inline char *printInt(char *buffer,
}
--buffer;
}
if (minus)
{
--buffer;
@ -128,10 +136,10 @@ inline std::string escape_JSON(const std::string &input)
inline std::size_t URIDecode(const std::string &input, std::string &output)
{
auto src_iter = input.begin();
auto src_iter = std::begin(input);
output.resize(input.size() + 1);
std::size_t decoded_length = 0;
for (decoded_length = 0; src_iter != input.end(); ++decoded_length)
for (decoded_length = 0; src_iter != std::end(input); ++decoded_length)
{
if (src_iter[0] == '%' && src_iter[1] && src_iter[2] && isxdigit(src_iter[1]) &&
isxdigit(src_iter[2]))