Author: audreyt
Date: Sun Mar 11 14:52:42 2007
New Revision: 14337
Modified:
doc/trunk/design/syn/S03.pod
Log:
* S03: Allow infix-assignment forms in the simple-one-arg
case of variable declaration:
constant Dog $fido .= new; # okay: a constant Dog object
constant Dog $fido = Dog.new; # same thing
However, this is not a generalized relaxation of the Signature syntax:
constant Dog $fido = $fido.new; # error: cannot refer to itself
constant (Dog $fido .= new); # error: cannot use .= with parens
Modified: doc/trunk/design/syn/S03.pod
==============================================================================
--- doc/trunk/design/syn/S03.pod (original)
+++ doc/trunk/design/syn/S03.pod Sun Mar 11 14:52:42 2007
@@ -14,7 +14,7 @@
Date: 8 Mar 2004
Last Modified: 12 Mar 2007
Number: 3
- Version: 106
+ Version: 107
=head1 Overview
@@ -3172,6 +3172,15 @@
constant :($foo = 123); # same thing (full Signature form)
constant ($foo) = 123; # wrong: constants cannot be assigned to
+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
+
Parentheses must always be used when declaring multiple parameters:
my $a; # okay
