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CONSTEXPR c++20 string functions

v1
Brett 2023-10-25 14:30:24 -04:00
parent 96af65a675
commit fcceff189b
1 changed files with 27 additions and 23 deletions
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50
include/blt/std/string.h
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@ -14,6 +14,10 @@
#include <vector>
#include <cctype>
#if __cplusplus >= 202002L
#define BLT_CPP20_CONSTEXPR constexpr
#endif
namespace blt::string
{
@ -60,7 +64,7 @@ namespace blt::string
}
};
static inline bool starts_with(const std::string& string, const std::string& search)
static inline BLT_CPP20_CONSTEXPR bool starts_with(const std::string& string, const std::string& search)
{
if (search.length() > string.length())
return false;
@ -74,7 +78,7 @@ namespace blt::string
return true;
}
static inline bool ends_with(const std::string& string, const std::string& search)
static inline BLT_CPP20_CONSTEXPR bool ends_with(const std::string& string, const std::string& search)
{
if (search.length() > string.length())
return false;
@ -89,14 +93,14 @@ namespace blt::string
return true;
}
static inline bool contains(const std::string& string, const char search)
static inline BLT_CPP20_CONSTEXPR bool contains(const std::string& string, const char search)
{
return std::ranges::any_of(string, [search](const char c) -> bool {
return c == search;
});
}
static inline bool contains(const std::string& string, const std::string& search)
static inline BLT_CPP20_CONSTEXPR bool contains(const std::string& string, const std::string& search)
{
if (search.length() > string.length())
return false;
@ -127,15 +131,15 @@ namespace blt::string
* @param s string to lower case
* @return a string copy that is all lower case
*/
static inline std::string toLowerCase(const std::string& s)
static inline BLT_CPP20_CONSTEXPR std::string toLowerCase(const std::string& s)
{
std::stringstream str;
std::string str;
std::for_each(
s.begin(), s.end(), [&str](unsigned char ch) {
str << (char) std::tolower(ch);
str += (char) std::tolower(ch);
}
);
return str.str();
return str;
}
/**
@ -143,20 +147,20 @@ namespace blt::string
* @param s string to upper case
* @return a string copy that is all upper case
*/
static inline std::string toUpperCase(const std::string& s)
static inline BLT_CPP20_CONSTEXPR std::string toUpperCase(const std::string& s)
{
std::stringstream str;
std::string str;
std::for_each(
s.begin(), s.end(), [&str](unsigned char ch) {
str << (char) std::toupper(ch);
str += (char) std::toupper(ch);
}
);
return str.str();
return str;
}
// taken from https://stackoverflow.com/questions/14265581/parse-split-a-string-in-c-using-string-delimiter-standard-c
// extended to return a vector
static inline std::vector<std::string> split(std::string s, const std::string& delim)
static inline BLT_CPP20_CONSTEXPR std::vector<std::string> split(std::string s, const std::string& delim)
{
size_t pos = 0;
std::vector<std::string> tokens;
@ -170,7 +174,7 @@ namespace blt::string
return tokens;
}
static inline std::vector<std::string> split(std::string s, char delim)
static inline BLT_CPP20_CONSTEXPR std::vector<std::string> split(std::string s, char delim)
{
size_t pos = 0;
std::vector<std::string> tokens;
@ -185,7 +189,7 @@ namespace blt::string
}
// https://stackoverflow.com/questions/3418231/replace-part-of-a-string-with-another-string
static inline bool replace(std::string& str, const std::string& from, const std::string& to)
static inline BLT_CPP20_CONSTEXPR bool replace(std::string& str, const std::string& from, const std::string& to)
{
size_t start_pos = str.find(from);
if (start_pos == std::string::npos)
@ -194,7 +198,7 @@ namespace blt::string
return true;
}
static inline void replaceAll(std::string& str, const std::string& from, const std::string& to)
static inline BLT_CPP20_CONSTEXPR void replaceAll(std::string& str, const std::string& from, const std::string& to)
{
if (from.empty())
return;
@ -210,7 +214,7 @@ namespace blt::string
// taken from https://stackoverflow.com/questions/216823/how-to-trim-an-stdstring
// would've preferred to use boost lib but instructions said to avoid external libs
// trim from start (in place)
static inline std::string& ltrim(std::string& s)
static inline BLT_CPP20_CONSTEXPR std::string& ltrim(std::string& s)
{
s.erase(
s.begin(), std::find_if(
@ -222,7 +226,7 @@ namespace blt::string
}
// trim from end (in place)
static inline std::string& rtrim(std::string& s)
static inline BLT_CPP20_CONSTEXPR std::string& rtrim(std::string& s)
{
s.erase(
std::find_if(
@ -234,7 +238,7 @@ namespace blt::string
}
// trim from both ends (in place)
static inline std::string& trim(std::string& s)
static inline BLT_CPP20_CONSTEXPR std::string& trim(std::string& s)
{
ltrim(s);
rtrim(s);
@ -242,27 +246,27 @@ namespace blt::string
}
// trim from start (copying)
static inline std::string ltrim_copy(std::string s)
static inline BLT_CPP20_CONSTEXPR std::string ltrim_copy(std::string s)
{
ltrim(s);
return s;
}
// trim from end (copying)
static inline std::string rtrim_copy(std::string s)
static inline BLT_CPP20_CONSTEXPR std::string rtrim_copy(std::string s)
{
rtrim(s);
return s;
}
// trim from both ends (copying)
static inline std::string trim_copy(std::string s)
static inline BLT_CPP20_CONSTEXPR std::string trim_copy(std::string s)
{
trim(s);
return s;
}
static inline bool is_numeric(const std::string& s)
static inline BLT_CPP20_CONSTEXPR bool is_numeric(const std::string& s)
{
return std::ranges::all_of(s, [](char c) -> bool {
return std::isdigit(c);