Package utf8string provides an efficient way to index strings by rune rather than by byte.



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    type String

    type String struct {
    	// contains filtered or unexported fields

      String wraps a regular string with a small structure that provides more efficient indexing by code point index, as opposed to byte index. Scanning incrementally forwards or backwards is O(1) per index operation (although not as fast a range clause going forwards). Random access is O(N) in the length of the string, but the overhead is less than always scanning from the beginning. If the string is ASCII, random access is O(1). Unlike the built-in string type, String has internal mutable state and is not thread-safe.

      func NewString

      func NewString(contents string) *String

        NewString returns a new UTF-8 string with the provided contents.

        func (*String) At

        func (s *String) At(i int) rune

          At returns the rune with index i in the String. The sequence of runes is the same as iterating over the contents with a "for range" clause.

          func (*String) Init

          func (s *String) Init(contents string) *String

            Init initializes an existing String to hold the provided contents. It returns a pointer to the initialized String.

            func (*String) IsASCII

            func (s *String) IsASCII() bool

              IsASCII returns a boolean indicating whether the String contains only ASCII bytes.

              func (*String) RuneCount

              func (s *String) RuneCount() int

                RuneCount returns the number of runes (Unicode code points) in the String.

                func (*String) Slice

                func (s *String) Slice(i, j int) string

                  Slice returns the string sliced at rune positions [i:j].

                  func (*String) String

                  func (s *String) String() string

                    String returns the contents of the String. This method also means the String is directly printable by fmt.Print.

                    Source Files