proc decode_bytes_with_escapes(L: lexerTypes.Lexer; s: string): string {.
    ...raises: [SyntaxError], tags: [WriteIOEffect, RootEffect], forbids: [].}

proc decode_unicode_with_escapes(L: lexerTypes.Lexer; s: string): string {.
    ...raises: [SyntaxError], tags: [WriteIOEffect, RootEffect], forbids: [].}