Re: ReturnType and Parameters of Templated function/method
On Thursday, 13 October 2016 at 21:07:17 UTC, ketmar wrote: On Thursday, 13 October 2016 at 20:52:09 UTC, Patric Dexheimer wrote: So for now my idea is to brute force the numbers of arguments with 'compiles' trait or trying to get the sourcecode somehow. depending on source code form (even if you can get it) is highly error-prone. consider it UB. also, i think that you'd better not guess, but ask the user to explicitly instantiate the methods with `alias` -- this way you have to write less hacky code, and the user will have more control over what is bound. you may provide helper mixin templates to instantiate n-ary functions with given set of types too. this is slightly more work on the user side, but it doesn't depend on hacks and undocumented things. Yes, but i like the idea of "automagically" bind everything with little user effort. Sometimes you have a lot of code to expose to lua (and templated code as well with lots of templated argument combinations), so I think is nice to have some automated work on this. But you are right about the "highly error-prone" part. I´ll try to avoid that path :)
Re: ReturnType and Parameters of Templated function/method
On Thursday, 13 October 2016 at 20:52:09 UTC, Patric Dexheimer wrote: So for now my idea is to brute force the numbers of arguments with 'compiles' trait or trying to get the sourcecode somehow. depending on source code form (even if you can get it) is highly error-prone. consider it UB. also, i think that you'd better not guess, but ask the user to explicitly instantiate the methods with `alias` -- this way you have to write less hacky code, and the user will have more control over what is bound. you may provide helper mixin templates to instantiate n-ary functions with given set of types too. this is slightly more work on the user side, but it doesn't depend on hacks and undocumented things.
Re: ReturnType and Parameters of Templated function/method
On Thursday, 13 October 2016 at 18:01:25 UTC, Ali Çehreli wrote:
On 10/13/2016 07:19 AM, Patric Dexheimer wrote:
There is a way to capture the return type/parameters of a
templated
function like:
void add(T)(T t){}
Parameters!add;
Yes, i know that the template don´t have any type until
explicitly coded
like:
Parameters!(add!int);
Or another solution like getting the string function
declaration will be
enough:
"void add(T)(T t)"
Like what happens with:
void other_add(int x){}
writeln( typeof(__traits(getMember, Module,
"other_add")).stringof );
//output: void(int x)
There are several related options in std.traits. What exactly
are you trying to achieve? Perhaps there is a better way.
Ali
I´m working on a Lua binding for D.
One of my ideas is to try to make automatic binding for structs,
even if some method have templated arguments. My idea is to at
least try to bind templated functions with basic types
automatically (in the example, bind then add!int, add!float,
add!string etc..)
I tried arity!add which should resolve my problem too, but did´nt
compile too.
So for now my idea is to brute force the numbers of arguments
with 'compiles' trait or trying to get the sourcecode somehow.
Re: ReturnType and Parameters of Templated function/method
On 10/13/2016 07:19 AM, Patric Dexheimer wrote:
There is a way to capture the return type/parameters of a templated
function like:
void add(T)(T t){}
Parameters!add;
Yes, i know that the template don´t have any type until explicitly coded
like:
Parameters!(add!int);
Or another solution like getting the string function declaration will be
enough:
"void add(T)(T t)"
Like what happens with:
void other_add(int x){}
writeln( typeof(__traits(getMember, Module, "other_add")).stringof );
//output: void(int x)
There are several related options in std.traits. What exactly are you
trying to achieve? Perhaps there is a better way.
Ali
ReturnType and Parameters of Templated function/method
There is a way to capture the return type/parameters of a
templated function like:
void add(T)(T t){}
Parameters!add;
Yes, i know that the template don´t have any type until
explicitly coded like:
Parameters!(add!int);
Or another solution like getting the string function declaration
will be enough:
"void add(T)(T t)"
Like what happens with:
void other_add(int x){}
writeln( typeof(__traits(getMember, Module,
"other_add")).stringof ); //output: void(int x)
