Author: audreyt
Date: Mon Mar 12 14:20:51 2007
New Revision: 14342
Modified:
doc/trunk/design/syn/S03.pod
Log:
* S06: Clarify that simple parenless form of declarators must
support list-context assignment.
Modified: doc/trunk/design/syn/S03.pod
==============================================================================
--- doc/trunk/design/syn/S03.pod (original)
+++ doc/trunk/design/syn/S03.pod Mon Mar 12 14:20:51 2007
@@ -12,9 +12,9 @@
Maintainer: Larry Wall <[EMAIL PROTECTED]>
Date: 8 Mar 2004
- Last Modified: 12 Mar 2007
+ Last Modified: 13 Mar 2007
Number: 3
- Version: 108
+ Version: 109
=head1 Overview
@@ -3183,18 +3183,23 @@
associated type, traits and the initializer:
constant $foo = 123; # okay: initializes $foo to 123
- constant ($foo = 123); # same thing
+ constant ($foo = 123); # same thing (with explicit parens)
constant :($foo = 123); # same thing (full Signature form)
constant ($foo) = 123; # wrong: constants cannot be assigned to
+List-context assignment is supported for simple declarations:
+
+ constant @foo = 1,2,3; # okay: initializes @foo to (1,2,3)
+ constant (@foo = 1,2,3); # wrong: 2 and 3 are not variable names
+
When parentheses are omitted, you may use an infix assignment operator
instea dof C<=> as the initializer. In that case, the left hand side of
the infix operator will be the variable's prototype object:
constant Dog $fido .= new; # okay: a constant Dog object
constant Dog $fido = Dog.new; # same thing
- constant Dog $fido = $fido.new; # error: cannot refer to itself
- constant (Dog $fido .= new); # error: cannot use .= with parens
+ constant Dog $fido = $fido.new; # wrong: invalid self-reference
+ constant (Dog $fido .= new); # wrong: cannot use .= with parens
Parentheses must always be used when declaring multiple parameters:
