: Cannot implement with language itself. Need compiler support. Used C++ N STL
: Partially implemented with C++ N
: Fully implemented with C++ N
: Not yet implemented
| Features | Standard | Implemented in |
|---|---|---|
| Classes | ||
| span |  |
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| Constants | ||
| dynamic_extent | |
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| Functions | ||
| as_bytes as_writable_bytes |
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| Range access | ||
| begin cbegin |
  |
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| end cend |
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| rbegin crbegin |
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| rend crend |
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| size ssize |
 |
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| empty | |
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| data | |
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