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-rw-r--r--crates/ide_db/src/helpers.rs1
-rw-r--r--crates/ide_db/src/helpers/rust_doc.rs34
2 files changed, 35 insertions, 0 deletions
diff --git a/crates/ide_db/src/helpers.rs b/crates/ide_db/src/helpers.rs
index 83a665b37..720de0d1f 100644
--- a/crates/ide_db/src/helpers.rs
+++ b/crates/ide_db/src/helpers.rs
@@ -1,6 +1,7 @@
1//! A module with ide helpers for high-level ide features. 1//! A module with ide helpers for high-level ide features.
2pub mod insert_use; 2pub mod insert_use;
3pub mod import_assets; 3pub mod import_assets;
4pub mod rust_doc;
4 5
5use std::collections::VecDeque; 6use std::collections::VecDeque;
6 7
diff --git a/crates/ide_db/src/helpers/rust_doc.rs b/crates/ide_db/src/helpers/rust_doc.rs
new file mode 100644
index 000000000..e27e23867
--- /dev/null
+++ b/crates/ide_db/src/helpers/rust_doc.rs
@@ -0,0 +1,34 @@
1//! Rustdoc specific doc comment handling
2
3// stripped down version of https://github.com/rust-lang/rust/blob/392ba2ba1a7d6c542d2459fb8133bebf62a4a423/src/librustdoc/html/markdown.rs#L810-L933
4pub fn is_rust_fence(s: &str) -> bool {
5 let mut seen_rust_tags = false;
6 let mut seen_other_tags = false;
7
8 let tokens = s
9 .trim()
10 .split(|c| c == ',' || c == ' ' || c == '\t')
11 .map(str::trim)
12 .filter(|t| !t.is_empty());
13
14 for token in tokens {
15 match token {
16 "should_panic" | "no_run" | "ignore" | "allow_fail" => {
17 seen_rust_tags = !seen_other_tags
18 }
19 "rust" => seen_rust_tags = true,
20 "test_harness" | "compile_fail" => seen_rust_tags = !seen_other_tags || seen_rust_tags,
21 x if x.starts_with("edition") => {}
22 x if x.starts_with('E') && x.len() == 5 => {
23 if x[1..].parse::<u32>().is_ok() {
24 seen_rust_tags = !seen_other_tags || seen_rust_tags;
25 } else {
26 seen_other_tags = true;
27 }
28 }
29 _ => seen_other_tags = true,
30 }
31 }
32
33 !seen_other_tags || seen_rust_tags
34}