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chore: add description about string_view to README

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ToruNiina
2019-04-23 23:27:53 +09:00
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@@ -187,6 +187,12 @@ See also [underlying types](#underlying-types).
NOTE: To enable to get a reference, conversions between Float and Integer are not supported. NOTE: To enable to get a reference, conversions between Float and Integer are not supported.
After C++17, you can use `std::string_view` to get a string from a `toml::value`.
```cpp
const auto sv = toml::get<std::string_view>(tab.at("key"));
```
### In the case of type error ### In the case of type error
If you pass an invalid type to `toml::get`, `toml::type_error` will be thrown. If you pass an invalid type to `toml::get`, `toml::type_error` will be thrown.