Re: Getting a String Literal From an Aliased Template Mixin Parameter
On Thursday, 15 September 2016 at 01:40:50 UTC, Anonymouse wrote:
You mean, the literal string name of the original symbol you
passed as an alias? If so then you want the .stringof property.
void main () {
int first;
bool second;
string third;
mixin Foo!(first, second, third);
}
mixin template Foo(alias abc, alias def, alias ghi)
{
static assert(abc.stringof == "first");
static assert(def.stringof == "second");
static assert(ghi.stringof == "third");
}
Aha! Yes, that's exactly what I was looking for! Thanks!
Re: Getting a String Literal From an Aliased Template Mixin Parameter
On Thursday, 15 September 2016 at 00:15:42 UTC, jsako wrote:
I was making a quick mocking infrastructure for internal mocks
so I wouldn't have to pass in objects to constructors all the
time and came up with this:
[...]
This works great as long as there is only one mock object. I
thought about using string mixins to generate the properties on
a per-variable basis, but the problem is that I can't figure
out how to get the string of the variable name from the aliased
template mixin parameter. Is there a way to do this?
If not, I'll have to pass in the strings of the variables
seperately (as in: mixin internalMockRig!(thing, "thing",
testThing, "testThing", testThingMock, "testThingMock"); ), but
that seems inelegant (and a bit error prone).
You mean, the literal string name of the original symbol you
passed as an alias? If so then you want the .stringof property.
void main () {
int first;
bool second;
string third;
mixin Foo!(first, second, third);
}
mixin template Foo(alias abc, alias def, alias ghi)
{
static assert(abc.stringof == "first");
static assert(def.stringof == "second");
static assert(ghi.stringof == "third");
}
Getting a String Literal From an Aliased Template Mixin Parameter
I was making a quick mocking infrastructure for internal mocks so
I wouldn't have to pass in objects to constructors all the time
and came up with this:
[code]
mixin template internalMockRig(alias _var, string _varName, alias
_varStandard, alias _varMock) {
version(unittest) {
@property bool internalMockSetting() {
return _useInternalMocks;
}
@property useInternalMocks(bool uim) {
// Are we changing the mock type?
if (uim != _useInternalMocks) {
_useInternalMocks = uim;
if(_useInternalMocks) {
_var = new _varMock;
}
else {
_var = new _varStandard;
}
}
}
private: bool _useInternalMocks = false;
}
}
[/code]
Then in the object:
[code]
class usingTestThing {
testThing thing;
mixin internalMockRig!(thing, testThing, testThingMock);
this() {
thing = new testThing;
}
}
[/code]
This works great as long as there is only one mock object. I
thought about using string mixins to generate the properties on a
per-variable basis, but the problem is that I can't figure out
how to get the string of the variable name from the aliased
template mixin parameter. Is there a way to do this?
If not, I'll have to pass in the strings of the variables
seperately (as in: mixin internalMockRig!(thing, "thing",
testThing, "testThing", testThingMock, "testThingMock"); ), but
that seems inelegant (and a bit error prone).
