src/basilisp/lang/reader.py
def _read_character(ctx: ReaderContext) -> str:
    """Read a character literal from the input stream.

    Character literals may appear as:
      - \\a \\b \\c etc will yield 'a', 'b', and 'c' respectively

      - \\newline, \\space, \\tab, \\formfeed, \\backspace, \\return yield
        the named characters

      - \\uXXXX yield the unicode digit corresponding to the code
        point named by the hex digits XXXX"""
    start = ctx.reader.advance()
    assert start == "\\"

    s: List[str] = []
    reader = ctx.reader
    token = reader.peek()
    while True:
        if token == "" or whitespace_chars.match(token):
            break
        if not alphanumeric_chars.match(token):
            break
        s.append(token)
        token = reader.next_token()

    char = "".join(s)
    special = _SPECIAL_CHARS.get(char, None)
    if special is not None:
        return special

    match = unicode_char.match(char)
    if match is not None:
        try:
            return chr(int(f"0x{match.group(1)}", 16))
        except (ValueError, OverflowError):
            raise SyntaxError(f"Unsupported character \\u{char}") from None

    if len(char) > 1:
        raise SyntaxError(f"Unsupported character \\{char}")

    return char
def _read_character(ctx: ReaderContext) -> str:
    start = ctx.reader.advance()
    assert start == "\\"

    s: List[str] = []
    reader = ctx.reader
    token = reader.peek()
    while True:
        if token == "" or whitespace_chars.match(token):
            break
        if not alphanumeric_chars.match(token):
            break
        s.append(token)
        token = reader.next_token()

    char = "".join(s)
    special = _SPECIAL_CHARS.get(char, None)
    if special is not None:
        return special

    match = unicode_char.match(char)
    if match is not None:
        try:
            return chr(int(f"0x{match.group(1)}", 16))
        except (ValueError, OverflowError):
            raise SyntaxError(f"Unsupported character \\u{char}") from None

    if len(char) > 1:
        raise SyntaxError(f"Unsupported character \\{char}")

    return char
def _read_character ( ctx : ReaderContext ) -> str : start = ctx . reader . advance ( ) assert start == "\\" s : List [ str ] = [ ] reader = ctx . reader token = reader . peek ( ) while True : if token == "" or whitespace_chars . match ( token ) : break if not alphanumeric_chars . match ( token ) : break s . append ( token ) token = reader . next_token ( ) char = "" . join ( s ) special = _SPECIAL_CHARS . get ( char , None ) if special is not None : return special match = unicode_char . match ( char ) if match is not None : try : return chr ( int ( f"0x{match.group(1)}" , 16 ) ) except ( ValueError , OverflowError ) : raise SyntaxError ( f"Unsupported character \\u{char}" ) from None if len ( char ) > 1 : raise SyntaxError ( f"Unsupported character \\{char}" ) return char
Read a character literal from the input stream.

    Character literals may appear as:
      - \\a \\b \\c etc will yield 'a', 'b', and 'c' respectively

      - \\newline, \\space, \\tab, \\formfeed, \\backspace, \\return yield
        the named characters

      - \\uXXXX yield the unicode digit corresponding to the code
        point named by the hex digits XXXX
Read a character literal from the input stream .