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July 26, 2020 Template error with gdc-10 but not with latest dmd and ldc | ||||
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The code example long add_long_n0(alias T=void)(long x) @safe pure nothrow @nogc { return x + 0; } int main(string[] args) { long long_sum = 0; long_sum += add_long_n0!(void)(cast(long)0); return cast(int)long_sum; } compiles without errors with dmd and ldc. But with gdc-10 as gdc -c linear_t.d it errors as linear_t.d:6:17: error: template instance add_long_n0!() does not match template declaration add_long_n0(alias T = void)(long x) 6 | long_sum += add_long_n0!()(cast(long)0); | ^ Why can't LDC handle such a trivial template example? |
July 27, 2020 Re: Template error with gdc-10 but not with latest dmd and ldc | ||||
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Posted in reply to Per Nordlöw | Old frontend: Up to 2.060 : Failure with output: onlineapp.d(2): Error: valid attribute identifiers are @property, @safe, @trusted, @system, @disable not @nogc 2.061 to 2.065.0: Failure with output: ----- onlineapp.d(2): Error: user defined attributes cannot appear as postfixes onlineapp.d(2): Error: semicolon expected following function declaration onlineapp.d(2): Error: Declaration expected, not 'return' onlineapp.d(2): Error: unrecognized declaration ----- 2.066.0 to 2.078.1: Failure with output: onlineapp.d(7): Error: template instance add_long_n0!void does not match template declaration add_long_n0(alias T = void)(long x) 2.079.1 to 2.086.1: Failure with output: onlineapp.d(7): Error: template instance `add_long_n0!void` does not match template declaration `add_long_n0(alias T = void)(long x)` Since 2.087.1: Success and no output |
July 26, 2020 Re: Template error with gdc-10 but not with latest dmd and ldc | ||||
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Posted in reply to rikki cattermole | On Sunday, 26 July 2020 at 19:27:13 UTC, rikki cattermole wrote:
> Old frontend:
>
> Up to 2.060 : Failure with output: onlineapp.d(2): Error: valid attribute identifiers are @property, @safe, @trusted, @system, @disable not @nogc
> 2.061 to 2.065.0: Failure with output:
> -----
> onlineapp.d(2): Error: user defined attributes cannot appear as postfixes
> onlineapp.d(2): Error: semicolon expected following function declaration
> onlineapp.d(2): Error: Declaration expected, not 'return'
> onlineapp.d(2): Error: unrecognized declaration
> -----
>
> 2.066.0 to 2.078.1: Failure with output: onlineapp.d(7): Error: template instance add_long_n0!void does not match template declaration add_long_n0(alias T = void)(long x)
> 2.079.1 to 2.086.1: Failure with output: onlineapp.d(7): Error: template instance `add_long_n0!void` does not match template declaration `add_long_n0(alias T = void)(long x)`
> Since 2.087.1: Success and no output
I don't understand.
I removed the qualifiers but still get the same error from this unqualified code:
long add_long_n0(alias T=void)(long x) { return x + 0; }
int main(string[] args) {
long long_sum = 0;
long_sum += add_long_n0!(void)(0);
return cast(int)long_sum;
}
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July 26, 2020 Re: Template error with gdc-10 but not with latest dmd and ldc | ||||
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Posted in reply to rikki cattermole | On Sunday, 26 July 2020 at 19:27:13 UTC, rikki cattermole wrote: > 2.066.0 to 2.078.1: Failure with output: onlineapp.d(7): Error: template instance add_long_n0!void does not match template declaration add_long_n0(alias T = void)(long x) > 2.079.1 to 2.086.1: Failure with output: onlineapp.d(7): Error: template instance `add_long_n0!void` does not match template declaration `add_long_n0(alias T = void)(long x)` > Since 2.087.1: Success and no output This feature? https://dlang.org/changelog/2.087.0.html#template_alias_matches_basic_types |
July 26, 2020 Re: Template error with gdc-10 but not with latest dmd and ldc | ||||
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Posted in reply to Iain Buclaw | On Sunday, 26 July 2020 at 20:32:55 UTC, Iain Buclaw wrote:
> This feature?
>
> https://dlang.org/changelog/2.087.0.html#template_alias_matches_basic_types
I see. Thanks.
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July 26, 2020 Re: Template error with gdc-10 but not with latest dmd and ldc | ||||
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Posted in reply to Per Nordlöw | On Sunday, 26 July 2020 at 21:48:09 UTC, Per Nordlöw wrote:
> I see. Thanks.
The code
long add_long_n0(alias T=void)(long x) { return x + 0; }
should be
long add_long_n0(T=void)(long x) { return x + 0; }
. My mistake.
Thanks.
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