• d-bugmail puremagic.com (86/86) Feb 06 2011 http://d.puremagic.com/issues/show_bug.cgi?id=5531

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=5531

           Summary: Erratic type deduction with pointers and type
                    modifiers
           Product: D
           Version: D2
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: michel.fortin michelf.com


--- Comment #0 from Michel Fortin <michel.fortin michelf.com> 2011-02-06
10:38:12 EST ---
Type deduction should match types which are a specialization of the given base
type, but this doesn't work when type modifiers are involved. Here is a list of
test cases which have been rigged to pass with the current compiler, but each
test with a FIXME on should be considered wrong.

template ap(T : int*) {
    enum ap = 1;
}

static assert(ap!(int*));
static assert(ap!(const(int*))); // FIXME: should not match
static assert(ap!(const(int)*)); // FIXME: should not match
static assert(ap!(immutable(int*))); // FIXME: should not match
static assert(ap!(immutable(int)*)); // FIXME: should not match
static assert(ap!(shared(int*))); // FIXME: should not match
static assert(ap!(shared(int)*)); // FIXME: should not match

template bp(T : const(int*)) {
    enum bp = 1;
}

static assert(bp!(int*));
static assert(bp!(const(int*)));
static assert(bp!(const(int)*));
static assert(bp!(immutable(int*)));
static assert(bp!(immutable(int)*));
static assert(bp!(shared(int*))); // FIXME: should not match
static assert(bp!(shared(int)*)); // FIXME: should not match

template cp(T : const(int)*) {
    enum cp = 1;
}

static assert(cp!(int*));
static assert(cp!(const(int*))); // FIXME: should not match (const ptr)
static assert(cp!(const(int)*));
static assert(cp!(immutable(int*))); // FIXME: should not match (immutable ptr)
static assert(cp!(immutable(int)*));
static assert(cp!(shared(int*))); // FIXME: should not match
static assert(cp!(shared(int)*)); // FIXME: should not match

template dp(T : U*, U) {
    alias U dp;
}

static assert(is(dp!(int*) == int));
static assert(is(dp!(const(int*)) == const(int))); // FIXME: should not match
(const ptr)
static assert(is(dp!(const(int)*) == const(int)));
static assert(is(dp!(immutable(int*)) == immutable(int))); // FIXME: should not
match (immutable ptr)
static assert(is(dp!(immutable(int)*) == immutable(int)));
static assert(is(dp!(shared(int*)) == shared(int))); // FIXME: should not match
(shared ptr)
static assert(is(dp!(shared(int)*) == shared(int)));

template ep(T : const(U*), U) {
    alias U ep;
}

static assert(is(ep!(int*) == int));
static assert(is(ep!(const(int*)) == int));
static assert(is(ep!(const(int)*) == int));
static assert(is(ep!(immutable(int*)) == int));
static assert(is(ep!(immutable(int)*) == int));
static assert(!is(ep!(shared(int*)))); // no match
static assert(!is(ep!(shared(int)*))); // no match

template fp(T : const(U)*, U) {
    alias U fp;
}

static assert(is(fp!(int*) == int));
static assert(is(fp!(const(int*)) == int)); // FIXME: should not match (const
ptr)
static assert(is(fp!(const(int)*) == int));
static assert(is(fp!(immutable(int*)) == int)); // FIXME: should not match
(immutable ref)
static assert(is(fp!(immutable(int)*) == int));
static assert(!is(fp!(shared(int*)))); // no match
static assert(!is(fp!(shared(int)*))); // no match

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------