Document the behaviour of filetest operators regarding parentheses.

This fixes bug #24127 (by documenting it as a feature.)

p4raw-id: //depot/perl@21431

diff --git a/pod/perlop.pod b/pod/perlop.pod
index a50dee9..081774e 100644 (file)
--- a/pod/perlop.pod
+++ b/pod/perlop.pod
@@ -281,8 +281,7 @@ of bits is also undefined.
 =head2 Named Unary Operators
 
 The various named unary operators are treated as functions with one
-argument, with optional parentheses.  These include the filetest
-operators, like C<-f>, C<-M>, etc.  See L<perlfunc>.
+argument, with optional parentheses.
 
 If any list operator (print(), etc.) or any unary operator (chdir(), etc.)
 is followed by a left parenthesis as the next token, the operator and
@@ -307,6 +306,11 @@ but, because * is higher precedence than named operators:
     rand (10) * 20;    # (rand 10) * 20
     rand +(10) * 20;   # rand (10 * 20)
 
+Regarding precedence, the filetest operators, like C<-f>, C<-M>, etc. are
+treated like named unary operators, but they don't follow this functional
+parenthesis rule.  That means, for example, that C<-f($file).".bak"> is
+equivalent to C<-f "$file.bak">.
+
 See also L<"Terms and List Operators (Leftward)">.
 
 =head2 Relational Operators