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28 lines
937 B
Markdown
28 lines
937 B
Markdown
# constexpr-to-string
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**Features:**
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* Convert any integral type to a string at compile-time
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* Supports converting to any base between 2 and 36 inclusive
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* No external dependencies, only includes `type_traits` for template parameter checking
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* Works best in C++20 GCC or C++17/20 Clang
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**How to use:**
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This single header file provides a `to_string` utility, which may be used as below:
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```cpp
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const char *number = to_string<2147483648999954564, 16>; // produces "1DCD65003B9A1884"
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puts(number);
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puts(to_string<-42>); // produces "-42"
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puts(to_string<30, 2>); // produces "11110"
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```
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With `to_string`, all that will be found in program disassembly are the resulting string literals, as if you wrote the strings yourself.
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Try it [on Compiler Explorer](https://godbolt.org/z/T-MFoh).
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**Known issues:**
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* With C++17 GCC, `to_string` must be used to initialize variables; otherwise, the integer-string conversion is done at run-time.
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