This is ridiculous!

Tomás

#include <string>
#include <iostream>
using std::cout;
using std::endl;

void FunctionThatMod ifies(std::stri ng &a)
{
a = "You've been modified.";
}
int main()
{
std::string const a("Untouchable. ");
std::string &b = a; //Actually compiles with error!
FunctionThatMod ifies(b);
std::cout << b;
}
Compiler gives me a warning. I think it should give me a downright error,
and I want it to give me a downright error.

Firstly, does the Standard say whether this should generate a warning or
an error?

Secondly, do compilers have an option whereby you can make it give an
error? If so, I'll be using it.
-Tomás

Mar 4 '06 #1

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Alf P. Steinbach

* Tomás:

std::string const a("Untouchable. ");
std::string &b = a; //Actually compiles with error!

Compiler gives me a warning. I think it should give me a downright error,
and I want it to give me a downright error.
It should not compile.

Firstly, does the Standard say whether this should generate a warning or
an error?
An error.

Secondly, do compilers have an option whereby you can make it give an
error? If so, I'll be using it.

Compiler options are compiler-specific; check your compiler's help text
and/or documentation.
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

Mar 4 '06 #2

Pete Becker

Tomás wrote:

Compiler gives me a warning. I think it should give me a downright error,
and I want it to give me a downright error.

Firstly, does the Standard say whether this should generate a warning or
an error?
It requires "a diagnostic." The standard doesn't talk about warnings and
errors.

Secondly, do compilers have an option whereby you can make it give an
error? If so, I'll be using it.

Many do.

--

Pete Becker
Roundhouse Consulting, Ltd.

Mar 5 '06 #3

Pete Becker

Alf P. Steinbach wrote:

Firstly, does the Standard say whether this should generate a warning
or an error?

An error.

The Standard requires "a diagnostic." It does not specify the form or
the consequences of that diagnostic, and it does not distinguish between
a "warning" and an "error."

--

Pete Becker
Roundhouse Consulting, Ltd.

Mar 5 '06 #4

Tomás

std::string &b = a; //Actually compiles with error!

God damn typo. Should've written:

Actuall compiles *without* error!
-Tomás

Mar 5 '06 #5

Joe Van Dyk

On Sun, 05 Mar 2006 09:37:52 -0500, Pete Becker wrote:

Alf P. Steinbach wrote:

Firstly, does the Standard say whether this should generate a warning
or an error?

An error.

The Standard requires "a diagnostic." It does not specify the form or
the consequences of that diagnostic, and it does not distinguish between
a "warning" and an "error."

What is "a diagnostic"?

Mar 6 '06 #6

Default User

Joe Van Dyk wrote:

On Sun, 05 Mar 2006 09:37:52 -0500, Pete Becker wrote:
Alf P. Steinbach wrote:

Firstly, does the Standard say whether this should generate a warning >>> or an error?

An error.

The Standard requires "a diagnostic." It does not specify the form
or the consequences of that diagnostic, and it does not distinguish
between a "warning" and an "error."

What is "a diagnostic"?

From the standard, under Terms and definitions:

1.3.2 diagnostic message
a message belonging to an implementation-defined subset of the
implementation' s output messages.

Brian

Mar 7 '06 #7

osmium

"Default User" writes:

What is "a diagnostic"?

From the standard, under Terms and definitions:

1.3.2 diagnostic message
a message belonging to an implementation-defined subset of the
implementation' s output messages.

There must be a word for that. You actually know *less* after reading the
definition than you did before you read it!

Mar 7 '06 #8

Jerry Coffin

In article <47************ @individual.net >, r124c4u102
@comcast.net says...

[ ... ]

There must be a word for that. You actually know *less* after reading the
definition than you did before you read it!

I don't agree that's the case here, but where it is I
think "Schildtism " would be an appropriate term.

--
Later,
Jerry.

The universe is a figment of its own imagination.

Mar 7 '06 #9

Alf P. Steinbach

* Pete Becker:

Alf P. Steinbach wrote:
Firstly, does the Standard say whether this should generate a warning
or an error?

An error.

The Standard requires "a diagnostic." It does not specify the form or
the consequences of that diagnostic, and it does not distinguish between
a "warning" and an "error."

I didn't see this erronous nit-picking posting when you made it, but
I'll clear that up anyway.

The 1998 C++ standard contains 135 instances of "error" being used as a
synonym for "ill-formed".

I.e., you chose the wrong term to look up, you should have looked up
"ill-formed", not "diagnostic ".

"Error" and "warning" are however not terms _defined_ by the standard.
They are terms used by actual compilers. "Error" means the program does
not compile, and "warning" means that at least that part of it compiles,
but with some probably dubious construct that may not do what you intended.

Just to repeat: the standard's official term corresponding to "error", a
program that does not compile, is not "diagnostic ", it is "ill-formed"
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

Mar 7 '06 #10

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