There is Macro.struct!(module, env), which will expand the struct for a given module accordingly and most likely what you would want to use.
On Fri, Nov 19, 2021 at 11:10 PM 'eksperimental' via elixir-lang-core < elixir-lang-core@googlegroups.com> wrote: > Hi Marten, > You will find this PR interesting > https://github.com/elixir-lang/elixir/issues/10352 > > Cheers, > - Eks > > On Fri, 19 Nov 2021 14:00:40 -0800 (PST) > "w...@resilia.nl" <w...@resilia.nl> wrote: > > > Hi all! > > > > I recently needed to check what fields for a struct were defined (if > > any) for a particular module, at compile-time (potentially in the > > body of that module, i.e. while the module was still 'open'). > > *(for the curious, it's part of code that builds a runtime type-check > > from a typespec, see here > > < > https://github.com/Qqwy/elixir-type_check/blob/21d5de5a1979ebd10d0f30818b6e837062027269/lib/type_check/internals/pre_expander.ex#L265-L270 > >)* > > > > There was no information in Elixir's documentation about this. > > Looking at the source of `defstruct` > > < > https://github.com/elixir-lang/elixir/blob/79cd891eb86ecb7654a7acdb63769cfdd950a5c0/lib/elixir/lib/kernel.ex#L5037-L5046> > > > we however find that it defines a `@__struct__` module attribute > > (which is then later on used to implement the introspection method > > `__struct__/0`). > > > > Now the question is: Is it OK for libraries to depend on > > `@__struct__` or should it be considered an implementation detail > > which is subject to change? > > > > -If it's OK: Should we maybe add a sentence to the module > > documentation of `Module`? Or the documentation of > > `Kernel.SpecialForms.%/2`? > > - If it's not: Is there a 'proper' way to obtain this information for > > an 'open' module instead? > > > > Thank you all, > > > > ~Marten/Qqwy > > > > -- > You received this message because you are subscribed to the Google Groups > "elixir-lang-core" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elixir-lang-core+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elixir-lang-core/619820bd.1c69fb81.8c1b5.36d4SMTPIN_ADDED_MISSING%40gmr-mx.google.com > . > -- You received this message because you are subscribed to the Google Groups "elixir-lang-core" group. To unsubscribe from this group and stop receiving emails from it, send an email to elixir-lang-core+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elixir-lang-core/CAGnRm4KkKwoGMct7Ot%3DxCHVQ-rSc0TsJigtUCRSHdoBBRNt-qw%40mail.gmail.com.
