Re: Using lazily ?

[Timon Gehr]

On 03/01/2012 10:50 PM, bioinfornatics wrote:
dear,
Noob question for know if D provide a shorter way i explain
we have a struct S:
struct S{
        string member1;
        string member2;
        string member3;
}

we parse a file:
File f = File("a path", "r");
S s;
sise_t tokenLength = "member1".length;
foreach( char[] line; f.byLine() )
     mixin("s." ~ line[0 .. tokenLength] ~ " = " ~ line[tokenLength ..
$]" ); // do not work because lien is not kno at compile time


I know this do not works i.e comment but it will save some line by
checking if is member1 2 or 3

They are a shorter way to do this use lazy ?


struct S{
    string member1;
    string member2;
    string member3;
}

S s;
size_t tokenLength = "member1".length;
void main(){
    foreach(char[] line; stdin.byLine()) foreach(m;__traits(allMembers,S)){
        if(line[0..tokenLength] == m) mixin("s."~m) = line[tokenLength 
.. $].idup;
    }
}