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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -48,3 +48,6 @@ features = [ | |
| "CssStyleDeclaration", | ||
| ] | ||
| version = "^0.3" | ||
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|
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| [dev-dependencies] | ||
| wasm-bindgen-test = "^0.3" | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| use proc_macro2::TokenStream; | ||
| use quote::quote; | ||
| use syn::parse::{Parse, ParseStream}; | ||
| use syn::spanned::Spanned; | ||
| use syn::{Data, DeriveInput, Ident}; | ||
|
|
||
| pub struct DeriveApp { | ||
| ident: Ident, | ||
| } | ||
|
|
||
| impl Parse for DeriveApp { | ||
| fn parse(input: ParseStream) -> syn::Result<Self> { | ||
| let DeriveInput { ident, data, .. } = input.parse()?; | ||
|
|
||
| match data { | ||
| Data::Enum(e) => { | ||
| return Err(syn::Error::new( | ||
| e.enum_token.span(), | ||
| "expected struct, found enum", | ||
| )) | ||
| } | ||
| Data::Struct(data) => data, | ||
| Data::Union(u) => { | ||
| return Err(syn::Error::new( | ||
| u.union_token.span(), | ||
| "expected enum, found union", | ||
| )) | ||
| } | ||
| }; | ||
|
|
||
| Ok(Self { ident }) | ||
| } | ||
| } | ||
|
|
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| pub fn root(input: DeriveApp) -> TokenStream { | ||
| let DeriveApp { ident, .. } = &input; | ||
|
|
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| quote! { | ||
| #[automatically_derived] | ||
| impl ::hikari_boot::Application for #ident { | ||
| #[allow(bindings_with_variant_name)] | ||
| fn switch() -> ::yew::Html { | ||
| todo!("implement switch") | ||
| } | ||
|
|
||
| fn App() -> yew::Html { | ||
| todo!("implement App") | ||
| } | ||
|
|
||
| fn ServerApp( | ||
| url: &String, | ||
| props: &::hikari_boot::AppContext<<Self as ::hikari_boot::Application>::AppProps> | ||
| ) -> yew::Html { | ||
| todo!("implement ServerApp") | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,27 +1,124 @@ | ||
| use std::collections::HashMap; | ||
|
|
||
| use proc_macro2::TokenStream; | ||
| use quote::quote; | ||
| use syn::parse::{Parse, ParseStream}; | ||
| use syn::{DeriveInput, Ident}; | ||
| use syn::{ | ||
| parse::{Parse, ParseStream}, | ||
| punctuated::Punctuated, | ||
| spanned::Spanned, | ||
| Data, DeriveInput, Fields, Ident, Path, Type, Variant, | ||
| }; | ||
|
|
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| const COMPONENT_ATTR_IDENT: &str = "component"; | ||
|
|
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| #[derive(Debug, Clone, PartialEq)] | ||
| pub struct Component { | ||
| component: Path, | ||
| props: Option<Type>, | ||
| } | ||
|
|
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| pub type Components = HashMap<Ident, Component>; | ||
|
|
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| pub struct DeriveAppProps { | ||
| ident: Ident, | ||
| components: Components, | ||
| } | ||
|
|
||
| impl Parse for DeriveAppProps { | ||
| fn parse(input: ParseStream) -> syn::Result<Self> { | ||
| let DeriveInput { ident, .. } = input.parse()?; | ||
| let DeriveInput { ident, data, .. } = input.parse()?; | ||
|
|
||
| let data = match data { | ||
| Data::Enum(data) => data, | ||
| Data::Struct(s) => { | ||
| return Err(syn::Error::new( | ||
| s.struct_token.span(), | ||
| "expected enum, found struct", | ||
| )) | ||
| } | ||
| Data::Union(u) => { | ||
| return Err(syn::Error::new( | ||
| u.union_token.span(), | ||
| "expected enum, found union", | ||
| )) | ||
| } | ||
| }; | ||
|
|
||
| let components = parse_variants_attributes(&data.variants)?; | ||
|
|
||
| Ok(Self { ident, components }) | ||
| } | ||
| } | ||
|
|
||
| fn parse_variants_attributes( | ||
| variants: &Punctuated<Variant, syn::token::Comma>, | ||
| ) -> syn::Result<Components> { | ||
| let mut components: Components = Default::default(); | ||
|
|
||
| for variant in variants.iter() { | ||
| let attrs = &variant.attrs; | ||
| let at_attrs = attrs | ||
| .iter() | ||
| .filter(|attr| attr.path().is_ident(COMPONENT_ATTR_IDENT)) | ||
| .collect::<Vec<_>>(); | ||
|
|
||
| Ok(Self { ident }) | ||
| let attr = match at_attrs.len() { | ||
| 1 => *at_attrs.first().unwrap(), | ||
| 0 => { | ||
| return Err(syn::Error::new( | ||
| variant.span(), | ||
| format!("{COMPONENT_ATTR_IDENT} attribute must be present on every variant"), | ||
| )) | ||
| } | ||
| _ => { | ||
| return Err(syn::Error::new_spanned( | ||
| quote! { #(#at_attrs)* }, | ||
| format!("only one {COMPONENT_ATTR_IDENT} attribute must be present"), | ||
| )) | ||
| } | ||
| }; | ||
|
|
||
| let component_path = attr.parse_args::<Path>()?; | ||
|
|
||
| let field = match &variant.fields { | ||
| Fields::Named(ref field) => { | ||
| return Err(syn::Error::new( | ||
| field.span(), | ||
| "only unnamed fields are supported", | ||
| )); | ||
| } | ||
| Fields::Unnamed(ref fields) => { | ||
| if fields.unnamed.len() > 1 { | ||
| return Err(syn::Error::new( | ||
| fields.span(), | ||
| "only one field is supported", | ||
| )); | ||
| } | ||
| Some(fields.unnamed.first().unwrap().ty.clone()) | ||
| } | ||
| Fields::Unit => None, | ||
| }; | ||
|
|
||
| components.insert( | ||
| variant.ident.clone(), | ||
| Component { | ||
| component: component_path, | ||
| props: field, | ||
| }, | ||
| ); | ||
| } | ||
|
|
||
| Ok(components) | ||
| } | ||
|
|
||
| pub fn root(input: DeriveAppProps) -> TokenStream { | ||
| let DeriveAppProps { ident, .. } = &input; | ||
| let DeriveAppProps { | ||
| components, ident, .. | ||
| } = &input; | ||
|
|
||
| quote! { | ||
| #[automatically_derived] | ||
| impl ::hikari_boot::DeriveAppPropsTrait for #ident { | ||
| type AppProps = Self; | ||
| impl ::hikari_boot::AppProps for #ident { | ||
| } | ||
| } | ||
| } |
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