- var expr_type = n_expr.stype
-
- # Get iterate
- var meth_iterate = v.visitor.get_method(expr_type, once "iterate".to_symbol)
+ var ne = n_expr
+ var expr_type = ne.stype
+ var tint = v.visitor.type_int
+ var meth # The method that call the closure
+ var args # The arguments of meth
+
+ if ne isa ARangeExpr and expr_type == v.visitor.type_range(tint) then
+ # Shortcut. No Range[Int] object allocated.
+ # 'for x in [y..z] do' become 'y.enumerate_to(z) !each(x) do'
+ # 'for x in [y..z[ do' become 'y.enumerate_before(z) !each(x) do'
+ # And both methods may be inlined
+ args = [v.generate_expr(ne.n_expr), v.generate_expr(ne.n_expr2)]
+ if ne isa ACrangeExpr then
+ meth = v.visitor.get_method(tint, once "enumerate_to".to_symbol)
+ else
+ assert ne isa AOrangeExpr
+ meth = v.visitor.get_method(tint, once "enumerate_before".to_symbol)
+ end
+ else
+ # Standard way.
+ # 'for x in e do' become 'e.iterate !each(x) do'
+ # Some iterate methods may be inlined (eg. the Array one)
+ meth = v.visitor.get_method(expr_type, once "iterate".to_symbol)
+ args = [v.generate_expr(n_expr)]
+ end