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Try and fail to make nodes object-safe in node graph

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This commit is contained in:
Dennis
2022-04-02 20:50:53 +02:00
committed by Keavon Chambers
parent fef173d3fe
commit 7384514b87
12 changed files with 200 additions and 64 deletions
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35
node-graph/proc-macro/src/lib.rs
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@@ -1,28 +1,27 @@
use graphene_core;
use proc_macro::TokenStream;
use proc_macro_roids::*;
use quote::{quote, ToTokens};
use syn::punctuated::Punctuated;
use syn::{parse_macro_input, FnArg, ItemFn, Pat, Type};
fn extract_type(a: FnArg) -> Box<Type> {
fn extract_type(a: FnArg) -> Type {
match a {
FnArg::Typed(p) => p.ty, // notice `ty` instead of `pat`
FnArg::Typed(p) => *p.ty, // notice `ty` instead of `pat`
_ => panic!("Not supported on types with `self`!"),
}
}
fn extract_arg_types(fn_args: Punctuated<FnArg, syn::token::Comma>) -> Vec<Box<Type>> {
return fn_args.into_iter().map(extract_type).collect::<Vec<_>>();
fn extract_arg_types(fn_args: Punctuated<FnArg, syn::token::Comma>) -> Vec<Type> {
fn_args.into_iter().map(extract_type).collect::<Vec<_>>()
}
fn extract_arg_idents(fn_args: Punctuated<FnArg, syn::token::Comma>) -> Vec<Box<Pat>> {
return fn_args.into_iter().map(extract_arg_pat).collect::<Vec<_>>();
fn extract_arg_idents(fn_args: Punctuated<FnArg, syn::token::Comma>) -> Vec<Pat> {
fn_args.into_iter().map(extract_arg_pat).collect::<Vec<_>>()
}
fn extract_arg_pat(a: FnArg) -> Box<Pat> {
fn extract_arg_pat(a: FnArg) -> Pat {
match a {
FnArg::Typed(p) => p.pat,
FnArg::Typed(p) => *p.pat,
_ => panic!("Not supported on types with `self`!"),
}
}
@@ -30,7 +29,7 @@ fn extract_arg_pat(a: FnArg) -> Box<Pat> {
#[proc_macro_attribute] // 2
pub fn to_node(_attr: TokenStream, item: TokenStream) -> TokenStream {
let string = item.to_string();
let item2 = item.clone();
let item2 = item;
let parsed = parse_macro_input!(item2 as ItemFn); // 3
//item.extend(generate_to_string(parsed, string)); // 4
//item
@@ -56,9 +55,16 @@ fn generate_to_string(parsed: ItemFn, string: String) -> TokenStream {
.iter()
.map(|t| t.to_token_stream())
.collect::<Vec<_>>();
let const_idents = idents
.iter()
.map(|t| {
let name = t.to_string().to_uppercase();
quote! {#name}
})
.collect::<Vec<_>>();
let node_fn_name = fn_name.append("_node");
let struct_name = fn_name.append("_node");
let struct_name = fn_name.append("_input");
let return_type_string = fn_return_type
.to_token_stream()
.to_string()
@@ -68,15 +74,18 @@ fn generate_to_string(parsed: ItemFn, string: String) -> TokenStream {
.map(|t| t.to_string())
.collect::<Vec<_>>()
.join(", ");
let error = format!("called {} with the wrong type", fn_name.to_string());
let error = format!("called {} with the wrong type", fn_name);
let x = quote! {
//#whole_function
mod #fn_name {
#(const #const_idents: DefaultNode<#types> = DefaultNode::new();)*
struct #struct_name {
#(#idents: #types,)*
}
impl Node for #struct_name {
}
impl
}
fn #node_fn_name #generics() -> Node<'static> {