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* [gcc/devel/rust/master] libproc_macro: Implement Extend for TokenStream
@ 2023-04-06 21:31 Thomas Schwinge
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From: Thomas Schwinge @ 2023-04-06 21:31 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:09c75e3750858577efe09a51416546b1e5cc0f5c
commit 09c75e3750858577efe09a51416546b1e5cc0f5c
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date: Mon Feb 20 13:31:52 2023 +0100
libproc_macro: Implement Extend for TokenStream
Implement extension from TokenTree and TokenStream iterators on
TokenStream rust type.
ChangeLog:
* librust/proc_macro/rust/bridge/token_stream.rs: Add internal
implementation for TokenStream extension.
* librust/proc_macro/rust/lib.rs: Add call to internal.
Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Diff:
---
librust/proc_macro/rust/bridge/token_stream.rs | 18 ++++++++++++++++++
librust/proc_macro/rust/lib.rs | 8 ++++----
2 files changed, 22 insertions(+), 4 deletions(-)
diff --git a/librust/proc_macro/rust/bridge/token_stream.rs b/librust/proc_macro/rust/bridge/token_stream.rs
index 7135a0fb81c..027f450b826 100644
--- a/librust/proc_macro/rust/bridge/token_stream.rs
+++ b/librust/proc_macro/rust/bridge/token_stream.rs
@@ -85,3 +85,21 @@ impl TokenStream {
result
}
}
+
+impl Extend<ExternalTokenTree> for TokenStream {
+ fn extend<I: IntoIterator<Item = ExternalTokenTree>>(&mut self, trees: I) {
+ for tt in trees {
+ self.push(tt.into())
+ }
+ }
+}
+
+impl Extend<ExternalTokenStream> for TokenStream {
+ fn extend<I: IntoIterator<Item = ExternalTokenStream>>(&mut self, streams: I) {
+ for stream in streams {
+ for tt in stream {
+ self.push(tt.into());
+ }
+ }
+ }
+}
diff --git a/librust/proc_macro/rust/lib.rs b/librust/proc_macro/rust/lib.rs
index 4888edb16a8..31676f15199 100644
--- a/librust/proc_macro/rust/lib.rs
+++ b/librust/proc_macro/rust/lib.rs
@@ -186,13 +186,13 @@ impl iter::FromIterator<TokenStream> for TokenStream {
}
impl Extend<TokenTree> for TokenStream {
- fn extend<I: IntoIterator<Item = TokenTree>>(&mut self, _trees: I) {
- todo!("Implement this function")
+ fn extend<I: IntoIterator<Item = TokenTree>>(&mut self, trees: I) {
+ self.0.extend(trees);
}
}
impl Extend<TokenStream> for TokenStream {
- fn extend<I: IntoIterator<Item = TokenStream>>(&mut self, _streams: I) {
- todo!("Implement this function")
+ fn extend<I: IntoIterator<Item = TokenStream>>(&mut self, streams: I) {
+ self.0.extend(streams)
}
}
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