program t68_length;

{ t68 -- LENGTH, the first string builtin FUNCTION.  CALC.INC:20 is

      for I := 1 to ((80-Length(S)) div 2) do Write(' ');

  A string's length is the byte at [address], so Length is loaded inline - no
  runtime entry and no address pushed.  A literal is emitted inline
  (EmStrBlob) and its length byte read from that image offset.

  CALC also writes LENGTH(StandardfunctionNames[sf]) - a string ELEMENT of an
  array with a variable index - which needs the variable-index work and is not
  what this fixture tests; here the argument is a variable and a literal. }

var
   s : string[20];
begin
   s := 'hello';
   writeln (Length (s));
   writeln (Length ('abc'));
   s := '';
   writeln (Length (s))
end.