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WIP: Macro not working fully yet

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This commit is contained in:
Nathan Sobo 2023-10-26 13:18:58 +02:00
parent 0285284ae1
commit f4cff69729
2 changed files with 25 additions and 13 deletions
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22
crates/gpui2_macros/src/derive_component.rs
View file

@ -1,9 +1,21 @@
use proc_macro::TokenStream;
use quote::quote;
use syn::{parse_macro_input, DeriveInput};
use syn::{parse_macro_input, parse_quote, DeriveInput};
pub fn derive_component(input: TokenStream) -> TokenStream {
let ast = parse_macro_input!(input as DeriveInput);
let mut ast = parse_macro_input!(input as DeriveInput);
if !ast
.generics
.params
.iter()
.any(|param| matches!(param, syn::GenericParam::Type(_)))
{
ast.generics.params.push(parse_quote! {
V: 'static
});
}
let name = &ast.ident;
let generics = &ast.generics;
let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
@ -37,7 +49,7 @@ pub fn derive_component(input: TokenStream) -> TokenStream {
if let Some(syn::GenericParam::Type(type_param)) = generics.params.first() {
type_param.ident.clone()
} else {
panic!("Expected first type parameter");
panic!("Expected first type parameter to be a view type");
}
});
@ -50,5 +62,9 @@ pub fn derive_component(input: TokenStream) -> TokenStream {
}
};
if name == "AssistantPanelStory" {
println!("Expanded tokens: {}", expanded.to_string());
}
TokenStream::from(expanded)
}