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perf: avoid allocating by just slicing.

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Signed-off-by: Dezhi Wu <wu543065657@163.com>
This commit is contained in:
Dezhi Wu 2021-10-26 20:55:58 +08:00
parent b7b9cd5e67
commit 31af94b73a
1 changed files with 5 additions and 8 deletions
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13
crates/rust-analyzer/src/markdown.rs
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@ -1,6 +1,4 @@
//! Transforms markdown
use std::borrow::Cow;
use ide_db::helpers::rust_doc::is_rust_fence;
const RUSTDOC_FENCE: &str = "```";
@ -10,9 +8,8 @@ pub(crate) fn format_docs(src: &str) -> String {
let mut in_code_block = false;
let mut is_rust = false;
for line in src.lines() {
let mut line = Cow::from(line);
if in_code_block && is_rust && code_line_ignored_by_rustdoc(&line) {
for mut line in src.lines() {
if in_code_block && is_rust && code_line_ignored_by_rustdoc(line) {
continue;
}
@ -23,15 +20,15 @@ pub(crate) fn format_docs(src: &str) -> String {
is_rust = is_rust_fence(header);
if is_rust {
line = Cow::Borrowed("```rust");
line = "```rust";
}
}
}
if in_code_block {
let trimmed = line.trim();
let trimmed = line.trim_start();
if trimmed.starts_with("##") {
line = Cow::Owned(line.replacen("##", "#", 1));
line = &trimmed[1..];
}
}