Module core::str::validations

Operations related to UTF-8 validation.

Constants

• CONT_MASK 🔒
  Mask of the value bits of a continuation byte.
• NONASCII_MASK 🔒
• UTF8_CHAR_WIDTH 🔒

Functions

• contains_nonascii 🔒
  Returns true if any byte in the word x is nonascii (>= 128).
• next_code_point^⚠Experimental
  Reads the next code point out of a byte iterator (assuming a UTF-8-like encoding).
• next_code_point_reverse 🔒 ^⚠
  Reads the last code point out of a byte iterator (assuming a UTF-8-like encoding).
• run_utf8_validation 🔒
  Walks through v checking that it’s a valid UTF-8 sequence, returning Ok(()) in that case, or, if it is invalid, Err(err).
• utf8_acc_cont_byte 🔒
  Returns the value of ch updated with continuation byte byte.
• utf8_char_widthExperimental
  Given a first byte, determines how many bytes are in this UTF-8 character.
• utf8_first_byte 🔒
  Returns the initial codepoint accumulator for the first byte. The first byte is special, only want bottom 5 bits for width 2, 4 bits for width 3, and 3 bits for width 4.
• utf8_is_cont_byte 🔒
  Checks whether the byte is a UTF-8 continuation byte (i.e., starts with the bits 10).