Re: SOme fun with D compiler

[Daniel Kozak via Digitalmars-d]

Dne 18.10.2016 v 13:36 Andrei Alexandrescu via Digitalmars-d napsal(a):


On 10/18/16 7:06 AM, wobbles wrote:

Compiler bug?

Looks like it's constantly going in circles trying to figure out what
the hell 'xxx' is :)
I cancelled compilation after a minute of 100% CPU usage so not sure if
it will ever finish.


If I add:

alias byRef this;

to Namespace's example either in Vector2f or ByRef, I get the same 
behavior. Daniel, could you please submit all three examples in an issue?


Thanks,

Andrei

https://issues.dlang.org/show_bug.cgi?id=16621

It is based on Namespace's example, soi I belive it is same error

Re: SOme fun with D compiler

[Andrei Alexandrescu via Digitalmars-d]

On 10/18/16 7:06 AM, wobbles wrote:

Compiler bug?

Looks like it's constantly going in circles trying to figure out what
the hell 'xxx' is :)
I cancelled compilation after a minute of 100% CPU usage so not sure if
it will ever finish.


If I add:

alias byRef this;

to Namespace's example either in Vector2f or ByRef, I get the same 
behavior. Daniel, could you please submit all three examples in an issue?


Thanks,

Andrei

Re: SOme fun with D compiler

[wobbles via Digitalmars-d]

On Tuesday, 18 October 2016 at 11:06:08 UTC, wobbles wrote:

On Tuesday, 18 October 2016 at 08:21:09 UTC, Daniel Kozak wrote:

Try to compile this:

import std.stdio;

auto xxx(T)()
{
 return this;
}

struct S
{
mixin xxx!(typeof(this));
alias xxx this;
}

void foo(S pos)
{
writefln("(%.2f|%.2f)", pos.x, pos.y);
}

void main()
{
}


Or this:

import std.stdio;

auto xxx(T)()
if (is(T == struct))
{
 return this;
}

struct Vector2f
{
mixin xxx!(typeof(this));
alias xxx this;
}

void foo(ref const Vector2f pos) {}

void main()
{
Vector2f v;
foo(v);
}


Compiler bug?

Looks like it's constantly going in circles trying to figure 
out what the hell 'xxx' is :)
I cancelled compilation after a minute of 100% CPU usage so not 
sure if it will ever finish.


With -v on, this is what it prints:
dmd compileFun.d -v
binarydmd
version   v2.071.0
config/usr/local/bin/dmd.conf
parse compileFun
importall compileFun
importobject
(/Library/D/dmd/src/druntime/import/object.d)
importcore.attribute
(/Library/D/dmd/src/druntime/import/core/attribute.d)

importstd.stdio (/Library/D/dmd/src/phobos/std/stdio.d)
importcore.stdc.stdio   
(/Library/D/dmd/src/druntime/import/core/stdc/stdio.d)
importcore.stdc.stdint  
(/Library/D/dmd/src/druntime/import/core/stdc/stdint.d)
importcore.stdc.stddef  
(/Library/D/dmd/src/druntime/import/core/stdc/stddef.d)
importcore.stdc.signal  
(/Library/D/dmd/src/druntime/import/core/stdc/signal.d)
importcore.stdc.wchar_  
(/Library/D/dmd/src/druntime/import/core/stdc/wchar_.d)
importcore.stdc.config  
(/Library/D/dmd/src/druntime/import/core/stdc/config.d)
importcore.stdc.stdarg  
(/Library/D/dmd/src/druntime/import/core/stdc/stdarg.d)
importcore.stdc.stdlib  
(/Library/D/dmd/src/druntime/import/core/stdc/stdlib.d)
importcore.stdc.time
(/Library/D/dmd/src/druntime/import/core/stdc/time.d)
importcore.sys.posix.sys.types  
(/Library/D/dmd/src/druntime/import/core/sys/posix/sys/types.d)
importcore.sys.posix.config 
(/Library/D/dmd/src/druntime/import/core/sys/posix/config.d)

importstd.typecons  (/Library/D/dmd/src/phobos/std/typecons.d)
importstd.meta  (/Library/D/dmd/src/phobos/std/meta.d)
importstd.traits(/Library/D/dmd/src/phobos/std/traits.d)
importstd.typetuple 
(/Library/D/dmd/src/phobos/std/typetuple.d)
importstd.stdiobase 
(/Library/D/dmd/src/phobos/std/stdiobase.d)
importstd.range.primitives  
(/Library/D/dmd/src/phobos/std/range/primitives.d)

semantic  compileFun
importcore.stdc.errno   
(/Library/D/dmd/src/druntime/import/core/stdc/errno.d)
importcore.stdc.string  
(/Library/D/dmd/src/druntime/import/core/stdc/string.d)

entry main  compileFun.d
semantic2 compileFun
semantic3 compileFun


And sticsk on semantic3 forever.

Re: SOme fun with D compiler

[wobbles via Digitalmars-d]

On Tuesday, 18 October 2016 at 08:21:09 UTC, Daniel Kozak wrote:

Try to compile this:

import std.stdio;

auto xxx(T)()
{
 return this;
}

struct S
{
mixin xxx!(typeof(this));
alias xxx this;
}

void foo(S pos)
{
writefln("(%.2f|%.2f)", pos.x, pos.y);
}

void main()
{
}


Or this:

import std.stdio;

auto xxx(T)()
if (is(T == struct))
{
 return this;
}

struct Vector2f
{
mixin xxx!(typeof(this));
alias xxx this;
}

void foo(ref const Vector2f pos) {}

void main()
{
Vector2f v;
foo(v);
}


Compiler bug?

Looks like it's constantly going in circles trying to figure out 
what the hell 'xxx' is :)
I cancelled compilation after a minute of 100% CPU usage so not 
sure if it will ever finish.