Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Return whether the string begins with a string.

bool
starts_with(
    string_view s) const noexcept;
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Return whether the string begins with a character.

bool
starts_with(
    char ch) const noexcept;
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