On Monday, 8 August 2022 at 06:58:42 UTC, bauss wrote:
``` this(string type)(ulong number) { ``` You cannot do this. Instead your type should look like this: First let's change it up a little bit. ``` struct TestArray(ulong element_n, string type) { int[element_n] elements; this(ulong number) { pragma(msg, "The type is: " ~ typeof(type).stringof); } } ```Now the above will still not work because you do `typeof(type)` which will always yield string because type is as string and also the typeof() is not needed in this case and will actually yield an error.If it must be a string then you can do it like this: ``` struct TestArray(ulong element_n, string type) { int[element_n] elements; this(ulong number) { mixin("alias T = " ~ type ~ ";"); pragma(msg, "The type is: " ~ T.stringof); } } ``` However the ideal implementation is probably this: ``` struct TestArray(ulong element_n, T) { int[element_n] elements; this(ulong number) { pragma(msg, "The type is: " ~ T.stringof); } } ``` To instantiate it you simply do: ``` TestArray!(10, "int") val = TestArray!(10, "int")(100); ``` Or ``` TestArray!(10, int) val = TestArray!(10, int)(100); ``` I will recommend an alias to make it easier: ``` alias IntTestArray = TestArray!(10, int); ... IntTestArray val = IntTestArray(100); ```
Thank you for all the great info! Unfortunately, while there is no problem in this example, this will not do for my real code as I need to have the argument in the constructor. Alternative, I have to
change the design of the program completely....
