feat: basic generic support
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1 file changed
+40
-9
@@ -3,7 +3,7 @@ use quote::{quote, ToTokens, TokenStreamExt};
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use syn::{
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parse::{Parse, ParseStream},
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punctuated::Punctuated,
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token, Block, FnArg, Generics, Ident, Pat, Result, ReturnType, Token, Visibility,
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*,
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};
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pub struct InlinePropsBody {
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@@ -86,26 +86,57 @@ impl ToTokens for InlinePropsBody {
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FnArg::Typed(t) => Some(&t.pat),
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});
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let modifiers = if generics.params.is_empty() {
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quote! { #[derive(Props, PartialEq)] }
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let first_lifetime = if let Some(GenericParam::Lifetime(lt)) = generics.params.first() {
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Some(lt)
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} else {
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quote! { #[derive(Props)] }
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None
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};
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let lifetime = if generics.params.is_empty() {
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quote! {}
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let modifiers = if first_lifetime.is_some() {
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quote! { #[derive(Props)] }
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} else {
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quote! { 'a, }
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quote! { #[derive(Props, PartialEq)] }
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};
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let (scope_lifetime, fn_generics, struct_generics) = if let Some(lt) = first_lifetime {
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let struct_generics: Punctuated<_, token::Comma> = generics
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.params
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.iter()
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.map(|it| match it {
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GenericParam::Type(tp) => {
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let mut tp = tp.clone();
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tp.bounds.push(parse_quote!( 'a ));
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GenericParam::Type(tp)
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}
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_ => it.clone(),
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})
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.collect();
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(
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quote! { #lt, },
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generics.clone(),
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quote! { <#struct_generics> },
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)
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} else {
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let lifetime: LifetimeDef = parse_quote! { 'a };
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let mut fn_generics = generics.clone();
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fn_generics
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.params
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.insert(0, GenericParam::Lifetime(lifetime.clone()));
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(quote! { #lifetime, }, fn_generics, quote! { #generics })
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};
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out_tokens.append_all(quote! {
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#modifiers
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#[allow(non_camel_case_types)]
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#vis struct #struct_name #generics {
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#vis struct #struct_name #struct_generics {
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#(#fields),*
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}
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#vis fn #ident #generics (#cx_token: Scope<#lifetime #struct_name #generics>) #output {
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#vis fn #ident #fn_generics (#cx_token: Scope<#scope_lifetime #struct_name #generics>) #output {
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let #struct_name { #(#field_names),* } = &cx.props;
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#block
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}
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