Re: print function

[ixid via Digitalmars-d-learn]

On Thursday, 4 February 2016 at 13:46:46 UTC, Dejan Lekic wrote:
On Thursday, 4 February 2016 at 00:23:07 UTC, ixid wrote:
It would be nice to have a simple writeln that adds spaces 
automatically like Python's 'print' in std.stdio, perhaps 
called print.

There are many implementations of string interpolation in D 
(that is what you want, basically). One of them is given in 
Phillipe's excellent book about templates: 
https://github.com/PhilippeSigaud/D-templates-tutorial/blob/master/D-templates-tutorial.md#simple-string-interpolation .

I have written an attempt at it but my point was that a print 
function would be a good addition to the standard library rather 
than asking someone to write an implementation for me.

string makePrintString(T)(T length) {
        import std.conv : to;
                
        string s = "writeln(";
        foreach( i; 0 .. length) {
                s ~= "a[" ~ i.to!string ~ "]";
                if(i != length - 1)
                        s ~= ",\" \",";
                else s ~= ");";
        }
                        
        return s;
}       

void print(A...)(A a) {         
        static if(a.length) {
                mixin(makePrintString(a.length));
        } else writeln;
}