Author: audreyt Date: Sat Jun 10 21:55:09 2006 New Revision: 9538 Modified: doc/trunk/design/syn/S02.pod
Log: * S02: Subscripts are now always in list context, period. Modified: doc/trunk/design/syn/S02.pod ============================================================================== --- doc/trunk/design/syn/S02.pod (original) +++ doc/trunk/design/syn/S02.pod Sat Jun 10 21:55:09 2006 @@ -12,9 +12,9 @@ Maintainer: Larry Wall <[EMAIL PROTECTED]> Date: 10 Aug 2004 - Last Modified: 23 May 2006 + Last Modified: 11 Jun 2006 Number: 2 - Version: 43 + Version: 44 This document summarizes Apocalypse 2, which covers small-scale lexical items and typological issues. (These Synopses also contain @@ -629,21 +629,22 @@ =item * The context in which a subscript is evaluated is no longer controlled -by the sigil either. Subscripts are always evaluated in scalar context -when used as a lvalue, and list context when used as a rvalue. +by the sigil either. Subscripts are always evaluated in list context. If you need to force inner context to scalar, we now have convenient single-character context specifiers such as + for numbers and ~ for strings. Conversely, put parenthesis around the lvalue expression to force inner context to list: - @x[f()] = g(); # scalar context for f() and g() - @x[f()] = @y[g()]; # scalar context for f(), list context for g() - @x[f()] = @y[+g()]; # scalar context for f() and g() - - (@x[f()]) = g(); # list context for f() and g() - (@x[f()]) = @y[g()]; # list context for f() and g() - (@x[f()]) = @y[+g()]; # list context for f(), scalar context for g() + @x[f()] = g(); # list context for f() and g() + @x[f()] = +g(); # list context for f(), scalar context for g() + @x[+f()] = g(); # scalar context for f() and g() + # -- see S03 for "SIMPLE" lvalues + + @x[f()] = @y[g()]; # list context for f() and g() + @x[f()] = [EMAIL PROTECTED]()]; # list context for f() and g() + @x[+f()] = @y[g()]; # scalar context for f(), list context for g() + @x[f()] = @y[+g()]; # list context for f(), scalar context for g() =item *
