Noratrieb/game-wip-dontplay
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nora 2023-04-18 15:02:56 +02:00
parent 9df90445ef
commit 5d8a15ea98
1 changed files with 4 additions and 26 deletions
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30
egui_inspect/egui-inspect-derive/src/lib.rs
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@ -1,33 +1,11 @@
use proc_macro::TokenStream; use proc_macro::TokenStream;
use quote::quote; use quote::quote;
use syn::{parse_macro_input, Attribute, Data, DeriveInput, Member}; use syn::{parse_macro_input, Attribute, Data, DeriveInput, Member};
enum FieldInspectKind {
/// Auto-inspected (it is assumed that the field implements Inspect)
Auto,
/// A function named by the token stream is called to inspect the field.
/// The function takes (thing: &mut T, ui: &mut Ui, id_source: u64)
WithFn(syn::Ident),
/// Not visited, left alone.
/// Useful when you want to skip a field that doesn't implement Inspect.
Opaque,
}
fn inspect_kind(attrs: &[Attribute]) -> FieldInspectKind {
for attr in attrs {
if attr.path().is_ident("opaque") {
return FieldInspectKind::Opaque;
} else if attr.path().is_ident("inspect_with") {
let fun: syn::Ident = attr.parse_args().expect("Failed to parse ident");
return FieldInspectKind::WithFn(fun);
}
}
FieldInspectKind::Auto
}
#[proc_macro_derive(Inspect)] #[proc_macro_derive(Inspect)]
pub fn derive_inspect(input: TokenStream) -> TokenStream { pub fn derive_inspect(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput); let input = parse_macro_input!(input as DeriveInput);
let ty_ident = input.ident;
let ts = match input.data { let ts = match input.data {
Data::Struct(s) => { Data::Struct(s) => {
let mut exprs = Vec::new(); let mut exprs = Vec::new();
@ -40,16 +18,16 @@ pub fn derive_inspect(input: TokenStream) -> TokenStream {
}); });
} }
quote! { quote! {
::egui::CollapsingHeader::new(stringify!(#ty_ident)).id_source(id_source).show(ui, |ui| { ::egui::CollapsingHeader::new("").id_source(id_source).show(ui, |ui| {
#(#exprs)* #(#exprs)*
}); });
} }
} }
_ => panic!(), _ => panic!(),
}; };
let (intro_generics, forward_generics, where_clauses) = input.generics.split_for_impl();
let expanded = quote! { let expanded = quote! {
impl #intro_generics ::egui_inspect::Inspect for #ty_ident #forward_generics #where_clauses { impl ::egui_inspect::Inspect for GameState {
fn inspect_mut(&mut self, ui: &mut ::egui::Ui, id_source: u64) { fn inspect_mut(&mut self, ui: &mut ::egui::Ui, id_source: u64) {
#ts #ts
} }