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digitalmars.D.bugs - [Issue 2030] New: String mixin within teplatate mixin doesn't compile

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2030

           Summary: String mixin within teplatate mixin doesn't compile
           Product: D
           Version: 2.013
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla digitalmars.com
        ReportedBy: bartosz relisoft.com


The following code doesn't compile:
template foo (string init)
{
    mixin ("string str = \"" ~ init ~ "\";");
}

mixin (foo !("hello"));

attribute argument to mixin must be a string, not (foo!("hello"))

Analogous code without a string mixin works:

template bar (string s)
{
    string str = s;
}

mixin bar!("hello");


--
Apr 24 2008
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2030


ary esperanto.org.ar changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID





No, the analogous code is

template bar (string s)
{
    string str = s;
}

mixin (bar!("hello"));

and it doesn't compile (and it shouldn't).

Notice the parenthesis after mixin. There's a difference between

mixin something;

and

mixin (something);

The first one is a template mixin
(http://digitalmars.com/d/1.0/template-mixin.html), the second one is a mixin
(http://www.digitalmars.com/d/1.0/mixin.html).

This compiles correctly:

template bar (string s)
{
    string str = s;
}

mixin bar!("hello");


--
Apr 24 2008
prev sibling next sibling parent "Janice Caron" <caron800 googlemail.com> writes:
On 24/04/2008, d-bugmail puremagic.com <d-bugmail puremagic.com> wrote:

  mixin (foo !("hello"));


Shouldn't that be

    mixin foo!("hello");

i.e. without the extra pair of parentheses?
Apr 24 2008
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2030






Yes, it's a parentheses problem. Shows you that making two completely different
constructs in a language differ only be parentheses is confusing.


--
Apr 25 2008