bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ide-assists/src/handlers/convert_char_literal.rs')
-rw-r--r--crates/ide-assists/src/handlers/convert_char_literal.rs46
1 files changed, 46 insertions, 0 deletions
diff --git a/crates/ide-assists/src/handlers/convert_char_literal.rs b/crates/ide-assists/src/handlers/convert_char_literal.rs
new file mode 100644
index 0000000000..7269ade006
--- /dev/null
+++ b/crates/ide-assists/src/handlers/convert_char_literal.rs
@@ -0,0 +1,46 @@
+use syntax::{AstToken, ast};
+
+use crate::{AssistContext, AssistId, Assists, GroupLabel};
+
+// Assist: convert_char_literal
+//
+// Converts character literals between different representations. Currently supports normal character -> ASCII / Unicode escape.
+pub(crate) fn convert_char_literal(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
+ if !ctx.has_empty_selection() {
+ return None;
+ }
+
+ let literal = ctx.find_node_at_offset::<ast::Literal>()?;
+ let literal = match literal.kind() {
+ ast::LiteralKind::Char(it) => it,
+ _ => return None,
+ };
+
+ let value = literal.value().ok()?;
+ let text = literal.syntax().text().to_string();
+ let range = literal.syntax().text_range();
+ let group_id = GroupLabel("Convert char representation".into());
+
+ let mut add_assist = |converted: String| {
+ // Skip no-op assists (e.g. `'const C: char = '\\x61';'` already matches the ASCII form).
+ if converted == text {
+ return;
+ }
+ let label = format!("Convert {text} to {converted}");
+ acc.add_group(
+ &group_id,
+ AssistId::refactor_rewrite("convert_char_literal"),
+ label,
+ range,
+ |builder| builder.replace(range, converted),
+ );
+ };
+
+ if value.is_ascii() {
+ add_assist(format!("'\\x{:02x}'", value as u32));
+ }
+
+ add_assist(format!("'\\u{{{:x}}}'", value as u32));
+
+ Some(())
+}