Re: Mixin/static if issue
On Wednesday, 25 August 2021 at 22:57:23 UTC, jfondren wrote:
Contrast:
[...]
```d
void main() {
import std.stdio;
uint TestVar = 5;
string mxnWrite_Size_t(string VarName)() {
static if (typeof(mixin(VarName)).stringof == "uint") {
return `write("` ~ VarName ~ `");`;
} else {
return `writeln("Apparently TestVar not a uint");`;
}
}
mixin(mxnWrite_Size_t!"TestVar");
}
```
Output: TestVar
Confirm works for me.
Thanks!
Re: Mixin/static if issue
On Wednesday, 25 August 2021 at 22:52:23 UTC, DLearner wrote:
On Wednesday, 25 August 2021 at 22:33:00 UTC, H. S. Teoh wrote:
[...}
I think what you meant to write is:
static if (typeof(mixin(VarName)).stringof == "uint") {
You want the type of the variable named by VarName, not the
type of VarName.
T
I understand your reasoning, but:
```
void main() {
import std.stdio;
uint TestVar = 5;
string mxnWrite_Size_t(string VarName) {
static if (typeof(mixin(VarName)).stringof == "uint") {
return `write("` ~ VarName ~ `");`;
} else {
return `writeln("Apparently TestVar not a uint");`;
}
}
mixin(mxnWrite_Size_t("TestVar"));
}
```
produced Error: variable `VarName` cannot be read at compile
time
Contrast:
```d
void main() {
import std.stdio;
uint TestVar = 5;
string mxnWrite_Size_t(string VarName)() {
static if (typeof(mixin(VarName)).stringof == "uint") {
return `write("` ~ VarName ~ `");`;
} else {
return `writeln("Apparently TestVar not a uint");`;
}
}
mixin(mxnWrite_Size_t!"TestVar");
}
```
Output: TestVar
Re: Mixin/static if issue
On Wednesday, 25 August 2021 at 22:33:00 UTC, H. S. Teoh wrote:
[...}
I think what you meant to write is:
static if (typeof(mixin(VarName)).stringof == "uint") {
You want the type of the variable named by VarName, not the
type of VarName.
T
I understand your reasoning, but:
```
void main() {
import std.stdio;
uint TestVar = 5;
string mxnWrite_Size_t(string VarName) {
static if (typeof(mixin(VarName)).stringof == "uint") {
return `write("` ~ VarName ~ `");`;
} else {
return `writeln("Apparently TestVar not a uint");`;
}
}
mixin(mxnWrite_Size_t("TestVar"));
}
```
produced Error: variable `VarName` cannot be read at compile time
Re: Mixin/static if issue
On Wed, Aug 25, 2021 at 10:16:39PM +, DLearner via Digitalmars-d-learn
wrote:
> Please see below:
> ```
> void main() {
>import std.stdio;
>
>uint TestVar = 5;
>
>string mxnWrite_Size_t(string VarName) {
^^
Obviously, VarName is a string. Why would you expect anything else?
> static if (typeof(VarName).stringof == "uint") {
[[...]
I think what you meant to write is:
static if (typeof(mixin(VarName)).stringof == "uint") {
You want the type of the variable named by VarName, not the type of
VarName.
T
--
Many open minds should be closed for repairs. -- K5 user
Mixin/static if issue
Please see below:
```
void main() {
import std.stdio;
uint TestVar = 5;
string mxnWrite_Size_t(string VarName) {
static if (typeof(VarName).stringof == "uint") {
return `write("` ~ VarName ~ `");`;
} else {
return `writeln("Apparently TestVar not a uint");`;
}
}
mixin(mxnWrite_Size_t("TestVar"));
}
```
What I expected was the string "TestVar".
What I got was the "Apparently..." error message.
Please, why is this?
