Add all_of and all_of_if methods to string_view, with correspon…

include/daw/daw_string_view.h

@@ -2324,6 +2324,14 @@ namespace daw {
 				return static_cast<size_type>( std::distance( begin( ), iter ) );
 			}
 
+			template<typename UnaryPredicate DAW_REQ_UNARY_PRED( UnaryPredicate,
+			                                                     CharT )>
+			DAW_REQ_UNARY_PRED_REQ( UnaryPredicate, CharT )
+			[[nodiscard]] constexpr bool all_of_if( UnaryPredicate pred,
+			                                        size_type pos = 0 ) const {
+				return find_first_not_of_if( std::move( pred ), pos ) == npos;
+			}
+
 			[[nodiscard]] constexpr size_type
 			find_first_of( CharT c, size_type pos = 0 ) const {
 				// Searching for a single character is exactly what find( ) does,
@@ -2524,6 +2532,45 @@ namespace daw {
 				return find_first_not_of( basic_string_view<CharT>( s, N - 1 ), 0 );
 			}
 
+			[[nodiscard]] constexpr bool
+			all_of( basic_string_view v, size_type pos = 0 ) const {
+				return find_first_not_of( v, pos ) == npos;
+			}
+
+			[[nodiscard]] constexpr bool all_of( CharT c,
+			                                     size_type pos = 0 ) const {
+				return find_first_not_of( c, pos ) == npos;
+			}
+
+			[[nodiscard]] constexpr bool all_of( const_pointer s, size_type pos,
+			                                     size_type count ) const {
+				return find_first_not_of( s, pos, count ) == npos;
+			}
+
+			[[nodiscard]] constexpr bool all_of( const_pointer s,
+			                                     size_type pos ) const {
+				return find_first_not_of( s, pos ) == npos;
+			}
+
+			template<size_type N>
+			[[nodiscard]] constexpr bool all_of( CharT const ( &&s )[N],
+			                                     size_type pos ) const {
+				daw_dbg_ensure( s[N - 1] == CharT{ } );
+				return find_first_not_of( basic_string_view<CharT>( s, N - 1 ), pos ) ==
+				       npos;
+			}
+
+			[[nodiscard]] constexpr bool all_of( const_pointer s ) const {
+				return find_first_not_of( s ) == npos;
+			}
+
+			template<size_type N>
+			[[nodiscard]] constexpr bool all_of( CharT const ( &&s )[N] ) const {
+				daw_dbg_ensure( s[N - 1] == CharT{ } );
+				return find_first_not_of( basic_string_view<CharT>( s, N - 1 ), 0 ) ==
+				       npos;
+			}
+
 			template<typename UnaryPredicate DAW_REQ_UNARY_PRED( UnaryPredicate,
 			                                                     CharT )>
 			DAW_REQ_UNARY_PRED_REQ( UnaryPredicate, CharT )

tests/daw_string_view2_test.cpp

@@ -286,6 +286,45 @@ namespace daw {
 		daw_expecting( daw::sv2::string_view::npos, pos );
 	}
 
+	constexpr bool daw_string_view_all_of_tests( ) {
+		using daw::sv2::string_view;
+
+		constexpr string_view empty{ };
+		constexpr string_view repeated = "aaaa";
+		constexpr string_view mixed = "abca";
+
+		return empty.all_of( 'a' ) and repeated.all_of( 'a' ) and
+		       not mixed.all_of( 'a' ) and mixed.all_of( 'a', mixed.size( ) ) and
+		       mixed.all_of( string_view{ "abc" } ) and
+		       not mixed.all_of( string_view{ "ab" } ) and
+		       mixed.all_of( "abc" ) and not mixed.all_of( "ab" ) and
+		       mixed.all_of( "a", 3 ) and mixed.all_of( "a", 3, 1 ) and
+		       not mixed.all_of( "a", 2, 1 ) and empty.all_of( "" ) and
+		       not repeated.all_of( "" );
+	}
+
+	constexpr bool daw_string_view_all_of_if_tests( ) {
+		using daw::sv2::string_view;
+		auto const is_lower = []( char c ) {
+			return c >= 'a' and c <= 'z';
+		};
+
+		return string_view{ }.all_of_if( is_lower ) and
+		       string_view{ "lower" }.all_of_if( is_lower ) and
+		       not string_view{ "lower1" }.all_of_if( is_lower ) and
+		       string_view{ "1lower" }.all_of_if( is_lower, 1 ) and
+		       string_view{ "1" }.all_of_if( is_lower, 1 );
+	}
+
+	static_assert( daw_string_view_all_of_tests( ) );
+	static_assert( daw_string_view_all_of_if_tests( ) );
+
+	static_assert( [] {
+		daw::sv2::string_view const sv = "abca";
+		char const chars[] = "ab";
+		return sv.find_first_not_of( std::move( chars ) ) == 2;
+	}( ) );
+
 	void daw_string_view_find_first_of_001( ) {
 		daw::sv2::string_view const a = "abcdefghijklm";
 		auto pos = a.find_first_of( "def" );