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33 lines
1 KiB
Rust
33 lines
1 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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#![cfg(not(test))]
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use proc_macro2::{Span, TokenStream};
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use proc_macro_crate::{crate_name, FoundCrate};
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use quote::quote;
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use syn::Ident;
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/// Identifier to the `deno_core` crate.
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///
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/// If macro called in deno_core, `crate` is used.
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/// If macro called outside deno_core, `deno_core` OR the renamed
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/// version from Cargo.toml is used.
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pub(crate) fn import() -> TokenStream {
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let found_crate =
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crate_name("deno_core").expect("deno_core not present in `Cargo.toml`");
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match found_crate {
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FoundCrate::Itself => {
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// TODO(@littledivy): This won't work for `deno_core` examples
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// since `crate` does not refer to `deno_core`.
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// examples must re-export deno_core to make this work
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// until Span inspection APIs are stabalized.
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//
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// https://github.com/rust-lang/rust/issues/54725
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quote!(crate)
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}
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FoundCrate::Name(name) => {
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let ident = Ident::new(&name, Span::call_site());
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quote!(#ident)
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}
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}
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}
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