diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/string | 33 | ||||
| -rw-r--r-- | include/string_view | 33 |
2 files changed, 66 insertions, 0 deletions
diff --git a/include/string b/include/string index e7142b2b2..f5d548965 100644 --- a/include/string +++ b/include/string @@ -301,6 +301,13 @@ public: int compare(size_type pos1, size_type n1, const value_type* s) const; int compare(size_type pos1, size_type n1, const value_type* s, size_type n2) const; + bool starts_with(basic_string_view<charT, traits> sv) const noexcept; // C++2a + bool starts_with(charT c) const noexcept; // C++2a + bool starts_with(const charT* s) const; // C++2a + bool ends_with(basic_string_view<charT, traits> sv) const noexcept; // C++2a + bool ends_with(charT c) const noexcept; // C++2a + bool ends_with(const charT* s) const; // C++2a + bool __invariants() const; }; @@ -1215,6 +1222,32 @@ public: int compare(size_type __pos1, size_type __n1, const value_type* __s) const; int compare(size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const; +#if _LIBCPP_STD_VER > 17 + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool starts_with(__self_view __sv) const _NOEXCEPT + { return __self_view(data(), size()).starts_with(__sv); } + + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool starts_with(value_type __c) const _NOEXCEPT + { return !empty() && _Traits::eq(front(), __c); } + + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool starts_with(const value_type* __s) const _NOEXCEPT + { return starts_with(__self_view(__s)); } + + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool ends_with(__self_view __sv) const _NOEXCEPT + { return __self_view(data(), size()).ends_with( __sv); } + + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool ends_with(value_type __c) const _NOEXCEPT + { return !empty() && _Traits::eq(back(), __c); } + + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool ends_with(const value_type* __s) const _NOEXCEPT + { return ends_with(__self_view(__s)); } +#endif + _LIBCPP_INLINE_VISIBILITY bool __invariants() const; _LIBCPP_INLINE_VISIBILITY diff --git a/include/string_view b/include/string_view index 4d8e1a931..4d8358288 100644 --- a/include/string_view +++ b/include/string_view @@ -143,6 +143,13 @@ namespace std { constexpr size_type find_last_not_of(const charT* s, size_type pos, size_type n) const; constexpr size_type find_last_not_of(const charT* s, size_type pos = npos) const; + constexpr bool starts_with(basic_string_view s) const noexcept; // C++2a + constexpr bool starts_with(charT c) const noexcept; // C++2a + constexpr bool starts_with(const charT* s) const; // C++2a + constexpr bool ends_with(basic_string_view s) const noexcept; // C++2a + constexpr bool ends_with(charT c) const noexcept; // C++2a + constexpr bool ends_with(const charT* s) const; // C++2a + private: const_pointer data_; // exposition only size_type size_; // exposition only @@ -565,6 +572,32 @@ public: (data(), size(), __s, __pos, traits_type::length(__s)); } +#if _LIBCPP_STD_VER > 17 + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool starts_with(basic_string_view __s) const _NOEXCEPT + { return size() >= __s.size() && compare(0, __s.size(), __s) == 0; } + + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool starts_with(value_type __c) const _NOEXCEPT + { return !empty() && _Traits::eq(front(), __c); } + + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool starts_with(const value_type* __s) const _NOEXCEPT + { return starts_with(basic_string_view(__s)); } + + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool ends_with(basic_string_view __s) const _NOEXCEPT + { return size() >= __s.size() && compare(size() - __s.size(), npos, __s) == 0; } + + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool ends_with(value_type __c) const _NOEXCEPT + { return !empty() && _Traits::eq(back(), __c); } + + _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY + bool ends_with(const value_type* __s) const _NOEXCEPT + { return ends_with(basic_string_view(__s)); } +#endif + private: const value_type* __data; size_type __size; |