0f03a97475
This crate provides the derive macros used by `peepmatic`, notable AST-related derives that enumerate child AST nodes, and operator-related derives that provide helpers for type checking.
24 lines
647 B
Rust
24 lines
647 B
Rust
use quote::quote;
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use syn::DeriveInput;
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use syn::Result;
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pub fn derive_into_dyn_ast_ref(input: &DeriveInput) -> Result<impl quote::ToTokens> {
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let ty = &input.ident;
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let opts = crate::PeepmaticOpts::from_attrs(&mut input.attrs.clone())?;
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if opts.no_into_dyn_node {
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return Ok(quote! {});
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}
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let (impl_generics, ty_generics, where_clause) = input.generics.split_for_impl();
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Ok(quote! {
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impl #impl_generics From<&'a #ty #ty_generics> for DynAstRef<'a> #where_clause {
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#[inline]
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fn from(x: &'a #ty #ty_generics) -> Self {
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Self::#ty(x)
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}
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}
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})
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}
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