Re: with (auto p = new ...)
On Tuesday, 23 September 2014 at 15:19:59 UTC, Andre wrote:
Hi,
I just wonder why with (auto p = new ...) is not working.
It would be some syntax sugar in this scenario:
with (auto p = new Panel())
{
parent = this;
text = bla;
with (auto b = new Button())
{
parent = p; // Here p is needed
text = bla2;
}
}
source\app.d(8): Error: expression expected, not 'auto'
source\app.d(8): Error: found 'p' when expecting ')'
source\app.d(8): Error: found '=' instead of statement
...
Kind regards
André
have you tried this?
---
import std.stdio;
struct myStruct{
int c=299792458;
}
void main(){
with(new myStruct()){
writeln(c);
}
}
---
Re: with (auto p = new ...)
On Friday, 26 September 2014 at 19:59:56 UTC, Freddy wrote:
On Tuesday, 23 September 2014 at 15:19:59 UTC, Andre wrote:
Hi,
I just wonder why with (auto p = new ...) is not working.
It would be some syntax sugar in this scenario:
with (auto p = new Panel())
{
parent = this;
text = bla;
with (auto b = new Button())
{
parent = p; // Here p is needed
text = bla2;
}
}
source\app.d(8): Error: expression expected, not 'auto'
source\app.d(8): Error: found 'p' when expecting ')'
source\app.d(8): Error: found '=' instead of statement
...
Kind regards
André
have you tried this?
---
import std.stdio;
struct myStruct{
int c=299792458;
}
void main(){
with(new myStruct()){
writeln(c);
}
}
---
opps, sorry I misread the quesion.
Re: with (auto p = new ...)
aOn Tuesday, 23 September 2014 at 15:19:59 UTC, Andre wrote:
Hi,
I just wonder why with (auto p = new ...) is not working.
It would be some syntax sugar in this scenario:
with (auto p = new Panel())
{
parent = this;
text = bla;
with (auto b = new Button())
{
parent = p; // Here p is needed
text = bla2;
}
}
source\app.d(8): Error: expression expected, not 'auto'
source\app.d(8): Error: found 'p' when expecting ')'
source\app.d(8): Error: found '=' instead of statement
...
Kind regards
see more example
http://techgurulab.com/course/java-quiz-online/
see more example
http://techgurulab.com/course/java-quiz-online/e example
Re: with (auto p = new ...)
Enhancement 13526 filed: https://issues.dlang.org/show_bug.cgi?id=13526
Re: with (auto p = new ...)
On Wed, 24 Sep 2014 14:39:25 + Andre via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: Enhancement 13526 filed: https://issues.dlang.org/show_bug.cgi?id=13526 i wrote a quickhack-patch for this ER. as it's my first patch that goes outside parser it needs to be reviewed by someone who knows compiler internals. ah, and we need grammar fixes for it too, but it's completely out of my scope now. signature.asc Description: PGP signature
with (auto p = new ...)
Hi,
I just wonder why with (auto p = new ...) is not working.
It would be some syntax sugar in this scenario:
with (auto p = new Panel())
{
parent = this;
text = bla;
with (auto b = new Button())
{
parent = p; // Here p is needed
text = bla2;
}
}
source\app.d(8): Error: expression expected, not 'auto'
source\app.d(8): Error: found 'p' when expecting ')'
source\app.d(8): Error: found '=' instead of statement
...
Kind regards
André
Re: with (auto p = new ...)
On Tuesday, 23 September 2014 at 15:19:59 UTC, Andre wrote: I just wonder why with (auto p = new ...) is not working. It would be some syntax sugar in this scenario: I presume with is limited to expressions and not statements as the messages says. However, you can use if (auto p = new Panel()) instead as long as the new doesn't fail, that is you still have memory left :)
Re: with (auto p = new ...)
How about:
auto b - new Button(); with (b) {
On Tuesday, 23 September 2014 at 15:19:59 UTC, Andre wrote:
Hi,
I just wonder why with (auto p = new ...) is not working.
It would be some syntax sugar in this scenario:
with (auto p = new Panel())
{
parent = this;
text = bla;
with (auto b = new Button())
{
parent = p; // Here p is needed
text = bla2;
}
}
source\app.d(8): Error: expression expected, not 'auto'
source\app.d(8): Error: found 'p' when expecting ')'
source\app.d(8): Error: found '=' instead of statement
...
Kind regards
André
Re: with (auto p = new ...)
Sorry, I sent that last message before I intended to.
How about:
auto b = new Button(); with (b) {
...
}
'b' is explicitly outside of the scope of the 'with' block, which
may not be what you intended. But you could use more braces to
add an extra level of scope if that's an issue:
...
text = blah;
{
auto b = new Button(); with (b) {
...
}
}
// b is no longer in scope
Graham
On Tuesday, 23 September 2014 at 15:19:59 UTC, Andre wrote:
Hi,
I just wonder why with (auto p = new ...) is not working.
It would be some syntax sugar in this scenario:
with (auto p = new Panel())
{
parent = this;
text = bla;
with (auto b = new Button())
{
parent = p; // Here p is needed
text = bla2;
}
}
source\app.d(8): Error: expression expected, not 'auto'
source\app.d(8): Error: found 'p' when expecting ')'
source\app.d(8): Error: found '=' instead of statement
...
Kind regards
André
Re: with (auto p = new ...)
Yes, that is also working. As far as I remember (only my tablet
currently available) also this works:
Panel p;
with(p = new Panel ()) {}
Therefore it seems strange,the same does not work with auto.
Kind regards
André
On Tuesday, 23 September 2014 at 19:49:22 UTC, Graham Fawcett
wrote:
Sorry, I sent that last message before I intended to.
How about:
auto b = new Button(); with (b) {
...
}
'b' is explicitly outside of the scope of the 'with' block,
which may not be what you intended. But you could use more
braces to add an extra level of scope if that's an issue:
...
text = blah;
{
auto b = new Button(); with (b) {
...
}
}
// b is no longer in scope
Graham
On Tuesday, 23 September 2014 at 15:19:59 UTC, Andre wrote:
Hi,
I just wonder why with (auto p = new ...) is not working.
It would be some syntax sugar in this scenario:
with (auto p = new Panel())
{
parent = this;
text = bla;
with (auto b = new Button())
{
parent = p; // Here p is needed
text = bla2;
}
}
source\app.d(8): Error: expression expected, not 'auto'
source\app.d(8): Error: found 'p' when expecting ')'
source\app.d(8): Error: found '=' instead of statement
...
Kind regards
André
Re: with (auto p = new ...)
I think this is just a language oversight. It's allowed in if statements, and people have made a good case for allowing it for switch statements. It just hasn't been implemented. I made an attempt one evening to implement it for switch statements, but I'm not at all familiar with DMD, so I put it on the back burner for the time being.
Re: with (auto p = new ...)
On Tuesday, 23 September 2014 at 20:16:29 UTC, andre wrote: Therefore it seems strange,the same does not work with auto. Yes, it seem logical to me allow this also in with and switch.
