digitalmars.D.bugs - [Issue 953] New: Multiple C style declarations of same type cannot be in one statement
- d-bugmail puremagic.com (19/19) Feb 12 2007 http://d.puremagic.com/issues/show_bug.cgi?id=953
- d-bugmail puremagic.com (11/11) Mar 20 2007 http://d.puremagic.com/issues/show_bug.cgi?id=953
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http://d.puremagic.com/issues/show_bug.cgi?id=953
Summary: Multiple C style declarations of same type cannot be in
one statement
Product: D
Version: 1.005
Platform: PC
OS/Version: Windows
Status: NEW
Keywords: rejects-valid
Severity: minor
Priority: P3
Component: DMD
AssignedTo: bugzilla digitalmars.com
ReportedBy: deewiant gmail.com
int foo[2], bar[2];
The above fails with the error message "multiple declarations must have the
same type, not int[2] and int[2]" which makes no sense. int[2] is the same type
as int[2].
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Feb 12 2007
d-bugmail puremagic.com
http://d.puremagic.com/issues/show_bug.cgi?id=953
bugzilla digitalmars.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
This is by design. The declaration should be:
int[2] foo, bar;
More than one C-style declaration in the same line is not allowed.
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Mar 20 2007
http://d.puremagic.com/issues/show_bug.cgi?id=953
deewiant gmail.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|minor |trivial
Status|RESOLVED |REOPENED
Keywords|rejects-valid |diagnostic
Priority|P3 |P4
Resolution|INVALID |
Then it's a problem with the error message, which should say that, instead of
its current nonsense.
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Mar 20 2007
http://d.puremagic.com/issues/show_bug.cgi?id=953
Witold Baryluk <baryluk smp.if.uj.edu.pl> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |baryluk smp.if.uj.edu.pl
05:10:34 PDT ---
Hi, i just tried in DMD 1.043
int a[8], c[8];
and given me this nonsensical error. I know this is redudant, but is there to
allow C style declarations. I just switch many times from C to D, and sometimes
forgot where am I.
In declarations.html we read:
"In a declaration declaring multiple symbols, all the declarations must be of
the same type:
int x,y; // x and y are ints
int* x,y; // x and y are pointers to ints
int x,*y; // error, multiple types
int[] x,y; // x and y are arrays of ints
int x[],y; // error, multiple types
"
I was all my life (actually life when i use D, so about 3 years) thinking this
means, that:
int[8] a,b,c;
is equivalent of
int a[8], b[8], c[8];
how about adding to spec example this entries:
int[2] x,y; // x and y are static arrays of ints
int x[2],y; // error, multiple types
int x[2],y[2]; // error, multiple types
int x[2],y[3]; // error, multiple types
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Aug 10 2009
http://d.puremagic.com/issues/show_bug.cgi?id=953
Andrej Mitrovic <andrej.mitrovich gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P4 |P2
CC| |andrej.mitrovich gmail.com
Platform|x86 |All
Version|1.005 |D1 & D2
AssignedTo|bugzilla digitalmars.com |nobody puremagic.com
OS/Version|Windows |All
Severity|trivial |normal
11:37:50 PST ---
This affects both D1 and D2.
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Jan 20 2013
http://d.puremagic.com/issues/show_bug.cgi?id=953 11:45:33 PST --- This would be more simple to implement if we simply destroyed C-style array syntax. I don't know why we're waiting so long to get rid of them. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jan 20 2013
http://d.puremagic.com/issues/show_bug.cgi?id=953 11:46:05 PST ---This would be more simple to implement if we simply destroyed C-style array syntax.Read that as: C-style declarations, because it also affects pointers. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jan 20 2013
http://d.puremagic.com/issues/show_bug.cgi?id=953
bearophile_hugs eml.cc changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bearophile_hugs eml.cc
So this code has different meanings in C and D:
void main() {
int *a, b;
}
And to keep the D language simple this is disallowed:
int a[8], c[8];
Then what is this issue asking for?
In Issue 5807 I have suggested to disallow mixing C and D style of array in a
single declaration:
// array of 5 dynamic arrays of ints.
int[][5] c;
int[] c[5];
int c[5][];
Also because of some problems it causes with vector ops syntax:
void main() {
int[] a1 = [1, 2, 3];
int[] a2 = new int[3];
a2[] = a1[]; // OK
int[3] a3[] = a2[]; // line 5, Error
}
Beside disallowing the mix of C and D syntaxes in a single declaration, another
thing that may be good to do is to perpetually deprecate the C syntax (and do
not turn it into an error).
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Jul 03 2013