91c3b210a2
# Objective Edition 2021 requires `dyn Trait` and it won't compile without `dyn`. ## Solution Added `dyn`.
19 lines
578 B
Rust
19 lines
578 B
Rust
use proc_macro::TokenStream;
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use quote::quote;
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use syn::{parse_macro_input, DeriveInput};
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pub fn derive_dynamic_plugin(input: TokenStream) -> TokenStream {
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let ast = parse_macro_input!(input as DeriveInput);
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let struct_name = &ast.ident;
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TokenStream::from(quote! {
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#[no_mangle]
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pub extern "C" fn _bevy_create_plugin() -> *mut dyn bevy::app::Plugin {
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// make sure the constructor is the correct type.
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let object = #struct_name {};
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let boxed = Box::new(object);
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Box::into_raw(boxed)
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}
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})
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}
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