07-Nov-2013 01:02, Timothee Cour пишет:
To those who don't see the use of this:
which code would you rather read & write? see pastebin:
http://dpaste.dzfl.pl/b9f65a39
Another advantage is that using an autoformatter won't mess up things
inside a r{..} literal.
Challenge accepted.
50 lines in current D2:
import std.algorithm, std.conv, std.array, std.uni, std.stdio;
auto embed(Vars...)(string tmpl)
{
auto app = appender!string();
alias Put = void delegate();
Put[string] fns;
foreach(i, v; Vars)
{
//strangely v.stringof is "v" - BUG/FEATURE ? :)
//may do better then to!string
fns[Vars[i].stringof] = (){ app.put(to!string(v)); };
}
auto slice = tmpl;
while(!slice.empty)
{
auto anchor = find(slice, '@');
app.put(slice[0..$-anchor.length]);
if(anchor.empty)
break;
slice = find!(a => !isAlpha(a))(anchor[1..$]);
auto name = anchor[1..$-slice.length];
if(!slice.empty)
{
if(name in fns)
fns[name]();
}
}
return app.data;
}
void main(){
int a = 2;
float b = 3.14;
string c = "hello";
auto x = q{var=@a, second=@b, third=@c!}.embed!(a,b,c);
writeln(x);
int age = 45;
string address = "Fleet st. 15";
dstring fieldName = "my_field";
auto y = q{
"firstName": "@firstName",
"age": @age,
"address": {
@fieldName: "@address",
}
}.embed!(age, fieldName, address);
writeln(y);
}
Prints as expected:
var=2, second=3.14, third=hello!
"firstName": "",
"age": 45,
"address": {
my_field: "Fleet st. 15",
}
Now isn't it already nice beyond proportions?
--
Dmitry Olshansky
