[英]How can I concatenate a string to an ident in a macro derive?
I need to create a macro derive where the name is part of the function name.我需要创建一个宏派生,其中名称是 function 名称的一部分。 (This code does not work, it is only to show the problem) (此代码不起作用,它只是为了显示问题)
fn impl_logic(ast: &syn::DeriveInput) -> TokenStream {
let name:&syn::Ident = &ast.ident;
let gen = quote! {
pub fn #name_logic() -> Arc<Mutex<UiAplicacion>> {
...
}
};
gen.into()
}
How can I do this?我怎样才能做到这一点?
Based on quote
's docs , you can construct a new identifier with syn::Ident
:根据quote
的文档,您可以使用syn::Ident
构造一个新的标识符:
let fname = format!("{}_logic", name);
let varname = syn::Ident::new(&fname, ident.span());
and then interpolate it:然后对其进行插值:
let gen = quote! {
pub fn #varname() -> Arc<Mutex<UiAplicacion>> {
...
}
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