Hello,
First, I am not very experimented with the combination of static lang (alloc &
typing) and OO (class-based). I'm implementing a library for lexical analysis
(lexing), with 2 minor issues:
-1- How to enforce that subclasses implement given methods without using
"abstract", which seems
from [https://dlang.org/spec/attribute.html#abstract] :
---
abstract Attribute
An abstract member function must be overridden by a derived class. Only virtual
member functions may be declared abstract; non-virtual member functions and
free-standing functions cannot be declared abstract
On 09/03/2019 21:10, ANtlord via Digitalmars-d-learn wrote:
On Saturday, 9 March 2019 at 20:04:53 UTC, Paul Backus wrote:
You can end up with a null `this` reference if you dereference a null pointer
to a struct and then call a method on the result. For example:
I can but my reference is n
On 09/03/2019 19:11, Jacob Shtokolov via Digitalmars-d-learn wrote:
The thing is that in PHP, for example, I would do
The thing is php needs to be able to "lexify" raw input data at runtime, while
in D this is done at compile-time. The ompiler has the lexer to do that.
But I agree that, for
On 12/03/2019 10:31, Boqsc via Digitalmars-d-learn wrote:
Please attach quick working examples for every sentence you write or it's just a
waste of time. People want to see the results and direct actions first before
anything else, it's more efficient communication. We are in the subforum of
Dl
I desperately try to declare/define/initialise a simple class instance at
module-level. This is a special (conceptually static and immutable) instance
used as a "marker", that just should exist and be accessible by methods of this
class and/or other classes defined in the same module. (Thus I do
https://dlang.org/spec/hash-map.html#static_initialization:
immutable long[string] aa = [
"foo": 5,
"bar": 10,
"baz": 2000
];
==> Error: non-constant expression `["foo":5L, "bar":10L, "baz":2000L]`
Also: I don't understand the error message:
* What is non-constant in the *expression*?
* A
On 14/03/2019 12:16, H. S. Teoh via Digitalmars-d-learn wrote:
On Thu, Mar 14, 2019 at 12:05:22PM +0100, spir via Digitalmars-d-learn wrote:
I desperately try to declare/define/initialise a simple class instance
at module-level. This is a special (conceptually static and immutable)
instance
On 14/03/2019 15:52, H. S. Teoh via Digitalmars-d-learn wrote:
On Thu, Mar 14, 2019 at 03:22:52PM +0100, spir via Digitalmars-d-learn wrote:
https://dlang.org/spec/hash-map.html#static_initialization:
immutable long[string] aa = [
"foo": 5,
"bar": 10,
"baz&
On 15/03/2019 00:45, ag0aep6g via Digitalmars-d-learn wrote:
On 14.03.19 20:43, Jacob Carlborg wrote:
class C {
uint i ;
this (uint i) {
this.i = i ;
}
this (uint i) shared {
this.i = i ;
}
this (uint i) immutable {
this.i = i ;
}
}
On 16/03/2019 04:49, Paul Backus via Digitalmars-d-learn wrote:
On Friday, 15 March 2019 at 23:57:15 UTC, aliak wrote:
Anyone knows how to make this work?
You need an explicit `inout` on the return value of `make`:
auto ref make(T)(inout auto ref T value) {
return inout(S!T)(value);
}
PS: the chapter of Ali Çehreli's book on func args is great:
http://ddili.org/ders/d.en/function_parameters.html
diniz
On 16/03/2019 11:19, Dennis via Digitalmars-d-learn wrote:
On Saturday, 16 March 2019 at 03:47:43 UTC, Murilo wrote:
Does anyone know if when I create a variable inside a scope as in
{int a = 10;}
it disappears complete from the memory when the scope finishes? Or does it
remain in some part of
On 17/03/2019 18:34, Kagamin via Digitalmars-d-learn wrote:
On Saturday, 16 March 2019 at 14:57:35 UTC, Paul Backus wrote:
This code fails to compile if you change `auto s2` to `const s2`--in other
words, it has the same problem as the original example.
Maybe there's not much need for qualifie
On 16/10/14 20:46, Uranuz via Digitalmars-d-learn wrote:
I have some string *str* of unicode characters. The question is how to check if
I have valid unicode code point starting at code unit *index*?
[...]
You cannot do that without decoding. Cheking whether utf-x is valid and decoding
are the
On 17/10/14 07:38, maarten van damme via Digitalmars-d-learn wrote:
While d can be complex, there's nothing preventing you from starting out
simple and not using all features at first.
I don't understand why it's not suitable for a beginner if you use this
approach...
For some reasons, in my vi
On 17/10/14 03:05, ketmar via Digitalmars-d-learn wrote:
On Fri, 17 Oct 2014 00:52:14 +
MachineCode via Digitalmars-d-learn
wrote:
I don't understand. If at least it were C but java? why not D
itself?
C is *awful* as "beginner's language". never ever let people start with
C if you don't h
On 17/10/14 09:29, thedeemon via Digitalmars-d-learn wrote:
On Friday, 17 October 2014 at 06:29:24 UTC, Lucas Burson wrote:
// This is where things breaks
{
ubyte[] buff = new ubyte[16];
buff[0..ATA_STR.length] = cast(ubyte[])(ATA_STR);
// read the string back from the
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