lex_string.md

• The effect of attempting to modify a string literal is undefined

  • Example:

  const char *p1 = "hello world\n"; 
  char *p2 = const_cast<char*>(p1) ;   // const_cast is already suspicious
  
  p2[0] = 'm' ;

  • Rationale *[lex.string]p8

  Ordinary string literals and UTF-8 string literals are also referred to as narrow string literals. A narrow string literal has type “array of n const char”, where n is the size of the string as defined below, and has static storage duration (6.6.4).