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Postings from April 2000
On Tue, Apr 04, 2000 at 09:22:08AM -0600, Tom Christiansen wrote: > my(%h, %g, $x, $y, $z); > %h = ($x => $y . $z); > %g = %h; > Use of uninitialized value in concatenation (.) at - line 3. > Use of uninitialized value in concatenation (.) at - line 3. > Use of uninitialized value in list assignment at - line 3. > > There was no list on either side. Those are just hashes. > It's an "accident of the compiler's implementation" that > this turns into a list. It could detect this and do something > else. Running that code produces warnings for line 2, not line 3. > my(@a, %h, $x, $y, $z); > @a = ($x => $x, "$x", "$y$z", undef() => $x.$y.$z); > %h = ($x => "@a", @a => @a, $y => join($x,$y,$z), @a); > Use of uninitialized value in string at - line 2. > Use of uninitialized value in concatenation (.) at - line 2. > Use of uninitialized value in concatenation (.) at - line 2. > Use of uninitialized value in concatenation (.) at - line 2. > Use of uninitialized value in concatenation (.) at - line 2. > Use of uninitialized value in concatenation (.) at - line 2. > Use of uninitialized value in join at - line 3. > Use of uninitialized value in join at - line 3. > Use of uninitialized value in join at - line 3. > Use of uninitialized value in join at - line 3. > Use of uninitialized value in join at - line 3. > Use of uninitialized value in join at - line 3. > Use of uninitialized value in list assignment at - line 3. > Use of uninitialized value in list assignment at - line 3. > Use of uninitialized value in list assignment at - line 3. > Use of uninitialized value in list assignment at - line 3. > Use of uninitialized value in list assignment at - line 3. > Use of uninitialized value in list assignment at - line 3. > Use of uninitialized value in list assignment at - line 3. > Use of uninitialized value in list assignment at - line 3. > > I ask you seriously: what it the *OPTIMAL* text you want to see here? > Let's pretend nothing is impossible. What do you REALLY want? If nothing were impossible, I think something like this would be optimal: Value of lexical $x is undefined in string at - line 2. Value of lexical $y is undefined in string at - line 2. Value of lexical $z is undefined in string at - line 2. Value of lexical $x is undefined in concatenation (.) at - line 2. Value of lexical $y is undefined in concatenation (.) at - line 2. Value of lexical $z is undefined in concatenation (.) at - line 2. Value of element 0 of lexical @a is undefined in string at - line 3. Value of element 1 of lexical @a is undefined in string at - line 3. Value of element 4 of lexical @a is undefined in string at - line 3. Value of lexical $x is undefined in join at - line 3. Value of lexical $y is undefined in join at - line 3. Value of lexical $z is undefined in join at - line 3. Value of lexical $x is undefined in hash assignment at - line 3. Value of element 0 of lexical @a is undefined in hash assignment at - line 3. Value of element 4 of lexical @a is undefined in hash assignment at - line 3. Value of element 0 of lexical @a is undefined in hash assignment at - line 3. Value of element 4 of lexical @a is undefined in hash assignment at - line 3. Value of lexical $y is undefined in hash assignment at - line 3. Value of element 0 of lexical @a is undefined in hash assignment at - line 3. Value of element 4 of lexical @a is undefined in hash assignment at - line 3. In a case such as C<undef() . "">, I would do: Value is undefined in concatenation ... or something like that. The perldiag entry would be: Value%s is undefined in %s Ronald