Hello,
I'm generating code using mixins and one of my mixins expands to
something like this:
```
adder(MyType!MyEnum.INTEGER(), MyType!MyEnum.STRING());
```
`MyType!MyEnum.STRING` is generated with `T.stringof `. I get the
error:
```
Error: template instance `MyType!(MyEnum)` does not matc
On Monday, 27 December 2021 at 21:05:51 UTC, data pulverizer
wrote:
Hello, ...
... an equivalent mixin error would be
```
//...
alias DOUBLE = MyEnum.DOUBLE;
alias STRING = MyEnum.STRING;
alias INTEGER = MyEnum.INTEGER;
void main()
{
alias T = MyType!(INTEGER);
alias U = MyType!(STRING)
On Monday, 27 December 2021 at 21:05:51 UTC, data pulverizer
wrote:
adder(MyType!MyEnum.INTEGER(), MyType!MyEnum.STRING());
The rule for !(args) is of you leave the parenthesis off, it only
uses the next single token as the argument. So it will never
include a dot; it is like you wrote `MyTyp
On Monday, 27 December 2021 at 21:31:03 UTC, Adam Ruppe wrote:
if you can paste teh code where you generate this I can prolly
show you a much easier way to do it. stringof sucks really hard.
Will the above `mixin` example suffice? It expands to the code
that I described.
On Monday, 27 December 2021 at 21:31:03 UTC, Adam Ruppe wrote:
if you can paste teh code where you generate this I can prolly
show you a much easier way to do it. stringof sucks really hard.
I think the only thing to do for now is probably for me to
construct a template that creates a proper s
On Monday, 27 December 2021 at 22:52:58 UTC, data pulverizer
wrote:
I think the only thing to do for now is probably for me to
construct a template that creates a proper string for this type.
It would look something like this:
```
enum safe_stringof(T) = T.stringof;
template safe_stringof(T: M
On Monday, 27 December 2021 at 21:21:30 UTC, data pulverizer
wrote:
alias T = MyType!(INTEGER);
What is MyType?
enum code = "writeln(\"instance: \", adder(" ~
T.stringof ~ "(), " ~ U.stringof ~ "()" ~ "));";
And why is this a string mixin instead of a plain simple function
On Monday, 27 December 2021 at 23:04:40 UTC, Adam Ruppe wrote:
On Monday, 27 December 2021 at 21:21:30 UTC, data pulverizer
wrote:
alias T = MyType!(INTEGER);
What is MyType?
enum code = "writeln(\"instance: \", adder(" ~
T.stringof ~ "(), " ~ U.stringof ~ "()" ~ "));";
A
On Tuesday, 28 December 2021 at 00:13:13 UTC, data pulverizer
wrote:
The types I'm generating are a template type I've constructed
for R's SEXP, so that my wrapped numeric vector (struct) type
is denoted `RVector!(REALSXP)`. But `alias REALSXP =
SEXPTYPE.REALSXP` where `SEXPTYPE` is an `enum`.
On Tuesday, 28 December 2021 at 00:13:13 UTC, data pulverizer
wrote:
There are various requirements, sometimes I have to cast or
type convert, so I **need** the type to paste correctly and
explicitly.
You almost never actually need types as strings. I'm almost
certain there's a better way for
On Tuesday, 28 December 2021 at 00:32:03 UTC, Paul Backus wrote:
The result of `.stringof` is completely implementation-defined,
may change arbitrarily between compiler releases, and is not
even guaranteed to be valid D code in the first place.
Wow, I didn't know this.
In this case, the simpl
On Tuesday, 28 December 2021 at 00:42:18 UTC, data pulverizer
wrote:
On Tuesday, 28 December 2021 at 00:32:03 UTC, Paul Backus wrote:
In this case, the simplest solution is to have your code
generator accept a string as its input, rather than a type.
For example:
```d
enum instantiate(string
On Tuesday, 28 December 2021 at 00:57:27 UTC, Paul Backus wrote:
```d
enum instantiate(string type, string expr) = type ~ "(" ~
expr ~ ")";
pragma(msg, instantiate!("RVector!(SEXPTYPE.REALSXP)", "x"));
```
One possibility is to generate a collection of compile time
strings that denote the
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