bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ide/src/hover/render.rs')
-rw-r--r--crates/ide/src/hover/render.rs56
1 files changed, 50 insertions, 6 deletions
diff --git a/crates/ide/src/hover/render.rs b/crates/ide/src/hover/render.rs
index ee96767411..674b32a7f5 100644
--- a/crates/ide/src/hover/render.rs
+++ b/crates/ide/src/hover/render.rs
@@ -17,11 +17,7 @@ use ide_db::{
};
use itertools::Itertools;
use stdx::format_to;
-use syntax::{
- algo,
- ast::{self, RecordPat},
- match_ast, AstNode, Direction, SyntaxToken, T,
-};
+use syntax::{algo, ast, match_ast, AstNode, AstToken, Direction, SyntaxToken, T};
use crate::{
doc_links::{remove_links, rewrite_links},
@@ -276,7 +272,7 @@ pub(super) fn keyword(
pub(super) fn struct_rest_pat(
sema: &Semantics<'_, RootDatabase>,
_config: &HoverConfig,
- pattern: &RecordPat,
+ pattern: &ast::RecordPat,
) -> HoverResult {
let missing_fields = sema.record_pattern_missing_fields(pattern);
@@ -526,6 +522,54 @@ pub(super) fn definition(
markup(docs.map(Into::into), desc, mod_path)
}
+pub(super) fn literal(sema: &Semantics<'_, RootDatabase>, token: SyntaxToken) -> Option<Markup> {
+ let lit = token.parent().and_then(ast::Literal::cast)?;
+ let ty = if let Some(p) = lit.syntax().parent().and_then(ast::Pat::cast) {
+ sema.type_of_pat(&p)?
+ } else {
+ sema.type_of_expr(&ast::Expr::Literal(lit))?
+ }
+ .original;
+
+ let value = match_ast! {
+ match token {
+ ast::String(string) => Ok(string.value()?.to_string()),
+ ast::ByteString(string) => Ok(format_args!("{:?}", string.value()?).to_string()),
+ ast::CString(string) => Ok(std::str::from_utf8(string.value()?.as_ref()).ok()?.to_owned()),
+ ast::Char(char) => Ok(char.value()?.to_string()),
+ ast::Byte(byte) => Ok(format!("0x{:X}", byte.value()?)),
+ ast::FloatNumber(num) => {
+ let (text, _) = num.split_into_parts();
+ let text = text.replace('_', "");
+ if ty.as_builtin().map(|it| it.is_f32()).unwrap_or(false) {
+ match text.parse::<f32>() {
+ Ok(num) => Ok(format!("{num} (bits: 0x{:X})", num.to_bits())),
+ Err(e) => Err(e.to_string()),
+ }
+ } else {
+ match text.parse::<f64>() {
+ Ok(num) => Ok(format!("{num} (bits: 0x{:X})", num.to_bits())),
+ Err(e) => Err(e.to_string()),
+ }
+ }
+ },
+ ast::IntNumber(num) => match num.value() {
+ Ok(num) => Ok(format!("{num} (0x{num:X}|0b{num:b})")),
+ Err(e) => Err(e.to_string()),
+ },
+ _ => return None
+ }
+ };
+ let ty = ty.display(sema.db);
+
+ let mut s = format!("```rust\n{ty}\n```\n___\n\n");
+ match value {
+ Ok(value) => format_to!(s, "value of literal: {value}"),
+ Err(error) => format_to!(s, "invalid literal: {error}"),
+ }
+ Some(s.into())
+}
+
fn render_notable_trait_comment(
db: &RootDatabase,
notable_traits: &[(Trait, Vec<(Option<Type>, Name)>)],