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digitalmars.D.bugs - [Issue 8848] New: Array literals and AA literals are rejected as template value parameters

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8848

           Summary: Array literals and AA literals are rejected as
                    template value parameters
           Product: D
           Version: D1 & D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: clugdbug yahoo.com.au


--- Comment #0 from Don <clugdbug yahoo.com.au> 2012-10-18 02:41:18 PDT ---
The template spec says that they are valid (both D1 and D2), but

template Bleherg(int[int] X) {}

gives:

bug.d(1): Error: arithmetic/string type expected for value-parameter, not
int[int]
---
However, the compiler accepts them as template value parameters when used with
in a tuple argument. The example below works correctly with both D1 and D2.
-----
class C ( T ... )
{
    pragma(msg, "The keys are   ", T[0].keys);
    pragma(msg, "The values are ", T[0].values);
}

alias C!( [ "abc"[] : 73, "sdg":6 ] ) G1;
alias C!( [ 22354.56 : 273, 43565.12:96 ] ) G2;
-----
Additionally, the name mangling for both array literals and AA literals is
clearly documented in the spec ABI page.

The error message is erroneous.

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8848


bearophile_hugs eml.cc changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bearophile_hugs eml.cc


--- Comment #1 from bearophile_hugs eml.cc 2012-10-18 02:56:16 PDT ---
(In reply to comment #0)

 The template spec says that they are valid (both D1 and D2),


So are associative arrays accepted, but simple arrays aren't?

template Foo(int[] X) {}
template Bar(int[5] X) {}
void main() {}


==>

test.d(1): Error: arithmetic/string type expected for value-parameter, not
int[]
test.d(2): Error: arithmetic/string type expected for value-parameter, not
int[5u]

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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--- Comment #2 from Don <clugdbug yahoo.com.au> 2012-10-19 02:40:26 PDT ---
(In reply to comment #1)

 (In reply to comment #0)

 The template spec says that they are valid (both D1 and D2),


 
 So are associative arrays accepted, but simple arrays aren't?
 
 template Foo(int[] X) {}
 template Bar(int[5] X) {}
 void main() {}


No, the current DMD accepts neither arrays or AAs in declarations. But both can
be passed in template tuple parameters.

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prev sibling parent d-bugmail puremagic.com writes:
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Andrej Mitrovic <andrej.mitrovich gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |andrej.mitrovich gmail.com


--- Comment #3 from Andrej Mitrovic <andrej.mitrovich gmail.com> 2013-08-22
14:41:26 PDT ---
(In reply to comment #2)

 (In reply to comment #1)

 (In reply to comment #0)

 The template spec says that they are valid (both D1 and D2),


 
 So are associative arrays accepted, but simple arrays aren't?
 
 template Foo(int[] X) {}
 template Bar(int[5] X) {}
 void main() {}


 
 No, the current DMD accepts neither arrays or AAs in declarations. But both can
 be passed in template tuple parameters.


W.r.t. arrays, is this just a parser issue? It's odd that we have this
situation:

-----
// template Foo(ubyte[]) { }  // nogo
template Bar(T...) { }     // ok

void main()
{
    enum ubyte[] x = [1, 2];

    // alias y = Foo!(x);
    alias z = Bar!(x);  // ok
}
-----

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Aug 22 2013