[Issue 918] Template order matter, version block change something with typedef, and another template bug.

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=918



--- Comment #4 from Witold Baryluk <baryluk at smp.if.uj.edu.pl> 2009-11-18 21:25:29 PST ---
I recently retested this code in DMD 2.032:


a918.d:
-----
import std.stdio;

typedef int num = 42;

version (A) {
    void pow(alias b)() {     writefln("alias %d", b); }
    void pow(num b)() {    writefln("num %d", b); }
    void pow(int b)() {    writefln("int %d", b); }
} else version (B) {
    void pow(num b)() {    writefln("num %d", b); }
    void pow(alias b)() {     writefln("alias %d", b); }
    void pow(int b)() {    writefln("int %d", b); }
} else version (C) {
    void pow(num b)() {    writefln("num %d", b); }
    void pow(alias b)() {     writefln("alias %d", b); }
} else {
    static assert(false, "Provide version");
}


void main() {
    num wyk = 22;
writeln("calling num wyk=22?");
    pow!(wyk)();

writeln("calling int=4?");
    pow!(4)();

    uint x = 333;
writeln("calling alias=x=333?");
    pow!(x)();
}
-----

It looks it behaves much better than original bug report:

------
baryluk at sredniczarny:/tmp$ dmd2 -version=A -w a918.d ; ./a918 
calling num wyk=22?
num -1077524476
calling int=4?
int 4
calling alias=x=333?
alias 333
baryluk at sredniczarny:/tmp$ dmd2 -version=B -w a918.d ; ./a918 
calling num wyk=22?
num -1081977116
calling int=4?
int 4
calling alias=x=333?
alias 333
baryluk at sredniczarny:/tmp$ dmd2 -version=C -w a918.d ; ./a918 
calling num wyk=22?
num -1076793804
calling int=4?
alias 4
calling alias=x=333?
alias 333
baryluk at sredniczarny:/tmp$ 
-----

We have the same behaviour regardles of version. In version C int properly uses
"alias" template. Order of templates doesn't metter. Removing or leaving
"version" blocks, doesn't change behaviour.


But here we also see regression. num is not passed correctly. Even after
removing "version" blocks, and leaving only "B" part. It also doesn't print any
"0" or "42", or desired "22", but some random negative number.

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