dmgolembiowski/edgemorph-ext

edgemorph-ext is an unofficial EdgeDB extension builder that is built on top of `pgx` by ZomboDB

Welcome to edgemorph-ext 👋

edgemorph-ext is an unofficial EdgeDB extension builder that is built on top of pgx

🏠 Homepage

Install

cargo install cargo-edmx

Usage

cargo edmx create my-edgedb-extension
cargo edmx build
cargo edmx save

Author

👤 David Golembiowski

• Github: @dmgolembiowski

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edgemorph-ext's Issues

Reusable specification

Following the official Postgres documentation as well as the set-returning function example, prepare a modular basis or template that can match any EdgeDB base object as well as can be returned from any SDL function with the singature
-> T using ( ... ) alias to -> T using EdgeQL $$ ... $$.

In particular, there should be macro support for various kinds of custom types and their borrows:

// src/lib.rs

#[macro_export]
macro_rules! impl_trait_for_ref {
    (
        $( #[$attr:meta] )*
        $vis:vis trait $name:ident {
            $( $body:tt )*
        }
    ) => {
        impl<'f, F: $name + ?Sized> $name for &'f F {
            visit_members!( call_via_deref; $($body)* );
        }
    };
}

#[macro_export]
macro_rules! impl_trait_for_mut_ref {
    (
        $( #[$attr:meta] )*
        $vis:vis trait $name:ident {
            $( $body:tt )*
        }
    ) => {
        impl<'f, F: $name + ?Sized> $name for &'f mut F {
            visit_members!( call_via_deref; $($body)* );
        }
    };
}

as well as associated types like those who share an associated type:

macro_rules! impl_trait_for_boxed {
    (
        $( #[$attr:meta] )*
        $vis:vis trait $name:ident {
            $( $body:tt )*
        }
    ) => {
        impl<F: $name + ?Sized> $name for Box<F> {
            visit_members!( call_via_deref; $($body)* );
        }
    };
}

where visit_members is given by:

macro_rules! visit_members {
     (
         $callback:ident;

         $( #[$attr:meta] )*
         fn $name:ident(&self $(, $arg_name:ident : $arg_ty:ty )*) $(-> $ret:ty)?;

         $( $rest:tt )*
     ) => {
         $callback!(
             $( #[$attr] )*
             fn $name(&self $(, $arg_name : $arg_ty )*) $(-> $ret)?
         );

         visit_members! { $callback; $($rest)* }
     };
     (
         $callback:ident;

         $( #[$attr:meta] )*
         fn $name:ident(&mut self $(, $arg_name:ident : $arg_ty:ty )*) $(-> $ret:ty)?;

         $( $rest:tt )*
     ) => {
         $callback!(
             $( #[$attr] )*
             fn $name(&mut self $(, $arg_name : $arg_ty )*) $(-> $ret)?
         );

         visit_members! { $callback; $($rest)* }
     };
     ($callback:ident;) => {};
 }

For others, see https://adventures.michaelfbryan.com/posts/non-trivial-macros/