Re: static foreach / How to construct concatenated string?

[Robert M. Münch via Digitalmars-d-learn]

On 2020-03-07 16:41:47 +0000, MoonlightSentinel said:

You can use an anonymous lambda to build the string in CTFE:

------------------------------------------

struct S {
     int a;
     bool b;
}

import std;

enum string sql = {
     string s = "CREATE TABLE data(";

     static foreach(f; FieldNameTuple!S) {
        s ~= f ~ ",";
     }

        s ~= ");";
     return s;
} ();

pragma(msg, sql);

------------------------------------------

This prints "CREATE TABLE data(a, b);"

You can get rid of the enum und the static and it will work too.

--
Robert M. Münch
http://www.saphirion.com
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