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feat: enable to access the 1st char of region

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ToruNiina 2019-12-19 22:07:50 +09:00
parent 5b35c1a74e
commit c199bd8b49
1 changed files with 3 additions and 0 deletions
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3
toml/region.hpp
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@ -41,6 +41,7 @@ struct region_base
region_base& operator=(region_base&& ) = default; region_base& operator=(region_base&& ) = default;
virtual bool is_ok() const noexcept {return false;} virtual bool is_ok() const noexcept {return false;}
virtual char front() const noexcept {return '\0';}
virtual std::string str() const {return std::string("unknown region");} virtual std::string str() const {return std::string("unknown region");}
virtual std::string name() const {return std::string("unknown file");} virtual std::string name() const {return std::string("unknown file");}
@ -89,6 +90,7 @@ struct location final : public region_base
~location() = default; ~location() = default;
bool is_ok() const noexcept override {return static_cast<bool>(source_);} bool is_ok() const noexcept override {return static_cast<bool>(source_);}
char front() const noexcept override {return *iter_;}
// this const prohibits codes like `++(loc.iter())`. // this const prohibits codes like `++(loc.iter())`.
const const_iterator iter() const noexcept {return iter_;} const const_iterator iter() const noexcept {return iter_;}
@ -240,6 +242,7 @@ struct region final : public region_base
} }
bool is_ok() const noexcept override {return static_cast<bool>(source_);} bool is_ok() const noexcept override {return static_cast<bool>(source_);}
char front() const noexcept override {return *first_;}
std::string str() const override {return make_string(first_, last_);} std::string str() const override {return make_string(first_, last_);}
std::string line() const override std::string line() const override