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simplify dead code checks and enhance diagnostic messages for unused symbols

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This commit is contained in:
Hong Jiarong 2025-11-15 21:56:08 +08:00
parent f6b6b679f4
commit c532b4a099
2 changed files with 17 additions and 14 deletions
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6
crates/tinymist-lint/src/dead_code.rs
View file

@ -84,11 +84,7 @@ fn should_skip_definition(def_info: &DefInfo, config: &DeadCodeConfig) -> bool {
matches!(
def_info.decl.as_ref(),
Decl::ModuleImport(_)
| Decl::Pattern(_)
| Decl::Spread(_)
| Decl::Constant(_)
| Decl::Content(_)
Decl::Pattern(_) | Decl::Spread(_) | Decl::Constant(_) | Decl::Content(_)
)
}

25
crates/tinymist-lint/src/dead_code/diagnostic.rs
View file

@ -3,7 +3,7 @@
//! This module creates user-friendly diagnostic messages for unused
//! definitions, with appropriate hints and severity levels.
use tinymist_analysis::syntax::{DefKind, ExprInfo};
use tinymist_analysis::syntax::{Decl, DefKind, ExprInfo};
use tinymist_project::LspWorld;
use typst::diag::{SourceDiagnostic, eco_format};
@ -23,6 +23,9 @@ pub fn generate_diagnostic(
return None;
}
let is_module_import = matches!(def_info.decl.as_ref(), Decl::ModuleImport(..));
let is_module_like = is_module_import || matches!(def_info.kind, DefKind::Module);
let kind_str = match def_info.kind {
DefKind::Function => "function",
DefKind::Variable => "variable",
@ -35,13 +38,16 @@ pub fn generate_diagnostic(
let name = def_info.decl.name();
// Don't warn about empty names (anonymous items)
if name.is_empty() {
if name.is_empty() && !is_module_import {
return None;
}
// Create the base diagnostic
let mut diag =
SourceDiagnostic::warning(def_info.span, eco_format!("unused {kind_str}: `{name}`"));
let mut diag = if is_module_import {
SourceDiagnostic::warning(def_info.span, eco_format!("unused module import"))
} else {
SourceDiagnostic::warning(def_info.span, eco_format!("unused {kind_str}: `{name}`"))
};
// Add helpful hints based on the scope and kind
match def_info.scope {
@ -50,11 +56,12 @@ pub fn generate_diagnostic(
"if this parameter is intentionally unused, prefix it with underscore: `_{name}`"
));
}
DefScope::File | DefScope::Local => {
DefScope::File | DefScope::Local if !is_module_like => {
diag = diag.with_hint(eco_format!(
"consider removing this {kind_str} or prefixing with underscore: `_{name}`"
));
}
DefScope::File | DefScope::Local => {}
DefScope::Exported => {
diag = diag.with_hint(eco_format!("this {kind_str} is exported but never used"));
}
@ -71,12 +78,12 @@ pub fn generate_diagnostic(
return None;
}
}
DefKind::Module => {
diag =
diag.with_hint("imported modules should be used or the import should be removed");
}
_ => {}
}
if is_module_like {
diag = diag.with_hint("imported modules should be used or the import should be removed");
}
Some(diag)
}