folly::settings::tryTo

Conversion functions for converting a SettingValueAndMetadata to a setting type T. Implementation is similar to folly/Conv and allows for customization using the convertTo function above.

Synopsis

Declared in <folly/settings/Types.h>

template<typename T>
Expected<T, ExpectedErrorType<decltype(convertTo(
        std::declval<const SettingValueAndMetadata&>(), std::declval<T&>()))>>
tryTo(SettingValueAndMetadata const& src);

Return Value

The converted value of type T, or an error on conversion failure.

Parameters

Name

Description

src

The setting string value and its metadata to convert from.

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