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feat: ability to use multiple classes in view macro using array syntax. (#2532)

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bicarlsen 2024-04-18 01:04:33 +02:00 committed by GitHub
parent 410225c4d1
commit 9a7dbd50eb
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1 changed files with 70 additions and 21 deletions
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91
leptos_macro/src/view/mod.rs
View file

@ -3,7 +3,11 @@ use convert_case::{Case::Snake, Casing};
use proc_macro2::{Ident, Span, TokenStream, TokenTree};
use quote::{quote, quote_spanned};
use rstml::node::{KeyedAttribute, Node, NodeElement, NodeName};
use syn::{spanned::Spanned, Expr, Expr::Tuple, ExprLit, ExprPath, Lit};
use syn::{
spanned::Spanned,
Expr::{self, Tuple},
ExprArray, ExprLit, ExprPath, Lit,
};
pub mod client_builder;
pub mod client_template;
@ -404,27 +408,72 @@ fn fancy_class_name<'a>(
node.key.span()=> .class
};
let class_name = &tuple.elems[0];
let class_name = if let Expr::Lit(ExprLit {
lit: Lit::Str(s),
..
}) = class_name
{
s.value()
} else {
proc_macro_error::emit_error!(
class_name.span(),
"class name must be a string literal"
);
Default::default()
};
let value = &tuple.elems[1];
return Some((
quote! {
#class(#class_name, #value)
},
class_name,
value,
));
match class_name {
Expr::Lit(ExprLit {
lit: Lit::Str(s), ..
}) => {
let class_name = s.value();
return Some((
quote! {
#class(#class_name, #value)
},
class_name,
value,
));
}
Expr::Array(ExprArray { elems, .. }) => {
let (tokens, class_name): (Vec<_>, Vec<_>) = elems
.iter()
.map(|elem| match elem {
Expr::Lit(ExprLit {
lit: Lit::Str(s), ..
}) => {
let class_name = s.value();
let tokens = quote! {
#class(#class_name, #value)
};
(tokens, class_name)
}
_ => {
proc_macro_error::emit_error!(
elem.span(),
"class name elements must be string \
literals"
);
(TokenStream::new(), Default::default())
}
})
.unzip();
let class_name = class_name.join(" ");
return Some((
quote! { #(#tokens)*},
class_name,
value,
));
}
_ => {
proc_macro_error::emit_error!(
class_name.span(),
"class name must be a string literal or array of \
string literals"
);
let class_name = Default::default();
return Some((
quote! {
#class(#class_name, #value)
},
class_name,
value,
));
}
}
} else {
proc_macro_error::emit_error!(
tuple.span(),