16 lines
383 B
Rust
16 lines
383 B
Rust
use proc_macro2::TokenStream;
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use quote::ToTokens;
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pub struct TokensOrDefault<'a, T: 'a>(pub &'a Option<T>);
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impl<'a, T> ToTokens for TokensOrDefault<'a, T>
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where
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T: ToTokens + Default,
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{
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fn to_tokens(&self, tokens: &mut TokenStream) {
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match self.0 {
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Some(t) => t.to_tokens(tokens),
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None => T::default().to_tokens(tokens),
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}
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}
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}
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