Evaluation of basic data types

• Simple data types

  Most of the YCP data types can't be “evaluated” at all, as they simply evaluate to themselves. This holds for the simple types void, boolean, integer, float, string, symbol and path.

• list

  When evaluating a list, the interpreter evaluates all the list elements thereby forming a new list.

  {
     list list_var = [ 1 + 1, true || false, "foo" + "bar" ];
  
     y2milestone("list_var: %1", list_var );
  }
              

  yields the log file entry

  ...ycp/list_eval.ycp:4 list_var: [2, true, "foobar"]
              

• map

  A map is handled similar to a list. The values (but not the keys) are evaluated to form a new map.

  {
     map map_var = $[ "one" : `one, `two : "one" + "one" ];
     
     y2milestone("map_var: %1", map_var );
  }
              

  yields the log file entry

  ...ycp/map_eval.ycp:4 map_var: $["one":`one, `two:"oneone"]
              

• term

  Upon evaluation, term parameters are evaluated to form a new term.

  {
     term term_var = `val ( 1 + 1, true || false, "foo" + "bar" );
  
     y2milestone("term_var: %1", term_var );
  }
              

  yields the log file entry

  ...ycp/term_eval.ycp:4 term_var: `val(2, true, "foobar")