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Add semantic tag for unresolved references

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This is a quick way to implement unresolved reference diagnostics.
For example, adding to VS Code config

    "editor.tokenColorCustomizationsExperimental": {
        "unresolvedReference": "#FF0000"
    },

will highlight all unresolved refs in red.
This commit is contained in:
Aleksey Kladov 2020-04-18 20:59:22 +02:00
parent 9b16ae5149
commit ca61356b01
7 changed files with 34 additions and 21 deletions
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6
crates/ra_ide/src/snapshots/highlighting.html
View file

@ -50,12 +50,12 @@ pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
<span class="keyword">fn</span> <span class="function declaration">main</span>() {
<span class="macro">println!</span>(<span class="string_literal">"Hello, {}!"</span>, <span class="numeric_literal">92</span>);
<span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">vec</span> = Vec::new();
<span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">vec</span> = <span class="unresolved_reference">Vec</span>::<span class="unresolved_reference">new</span>();
<span class="keyword control">if</span> <span class="keyword">true</span> {
<span class="keyword">let</span> <span class="variable declaration">x</span> = <span class="numeric_literal">92</span>;
<span class="variable mutable">vec</span>.push(<span class="struct">Foo</span> { <span class="field">x</span>, <span class="field">y</span>: <span class="numeric_literal">1</span> });
<span class="variable mutable">vec</span>.<span class="unresolved_reference">push</span>(<span class="struct">Foo</span> { <span class="field">x</span>, <span class="field">y</span>: <span class="numeric_literal">1</span> });
}
<span class="keyword unsafe">unsafe</span> { <span class="variable mutable">vec</span>.set_len(<span class="numeric_literal">0</span>); }
<span class="keyword unsafe">unsafe</span> { <span class="variable mutable">vec</span>.<span class="unresolved_reference">set_len</span>(<span class="numeric_literal">0</span>); }
<span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">x</span> = <span class="numeric_literal">42</span>;
<span class="keyword">let</span> <span class="variable declaration mutable">y</span> = &<span class="keyword">mut</span> <span class="variable mutable">x</span>;

6
crates/ra_ide/src/snapshots/rainbow_highlighting.html
View file

@ -28,11 +28,11 @@ pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
</style>
<pre><code><span class="keyword">fn</span> <span class="function declaration">main</span>() {
<span class="keyword">let</span> <span class="variable declaration" data-binding-hash="8121853618659664005" style="color: hsl(261,57%,61%);">hello</span> = <span class="string_literal">"hello"</span>;
<span class="keyword">let</span> <span class="variable declaration" data-binding-hash="2705725358298919760" style="color: hsl(17,51%,74%);">x</span> = <span class="variable" data-binding-hash="8121853618659664005" style="color: hsl(261,57%,61%);">hello</span>.to_string();
<span class="keyword">let</span> <span class="variable declaration" data-binding-hash="3365759661443752373" style="color: hsl(127,76%,66%);">y</span> = <span class="variable" data-binding-hash="8121853618659664005" style="color: hsl(261,57%,61%);">hello</span>.to_string();
<span class="keyword">let</span> <span class="variable declaration" data-binding-hash="2705725358298919760" style="color: hsl(17,51%,74%);">x</span> = <span class="variable" data-binding-hash="8121853618659664005" style="color: hsl(261,57%,61%);">hello</span>.<span class="unresolved_reference">to_string</span>();
<span class="keyword">let</span> <span class="variable declaration" data-binding-hash="3365759661443752373" style="color: hsl(127,76%,66%);">y</span> = <span class="variable" data-binding-hash="8121853618659664005" style="color: hsl(261,57%,61%);">hello</span>.<span class="unresolved_reference">to_string</span>();
<span class="keyword">let</span> <span class="variable declaration" data-binding-hash="794745962933817518" style="color: hsl(19,74%,76%);">x</span> = <span class="string_literal">"other color please!"</span>;
<span class="keyword">let</span> <span class="variable declaration" data-binding-hash="6717528807933952652" style="color: hsl(85,49%,84%);">y</span> = <span class="variable" data-binding-hash="794745962933817518" style="color: hsl(19,74%,76%);">x</span>.to_string();
<span class="keyword">let</span> <span class="variable declaration" data-binding-hash="6717528807933952652" style="color: hsl(85,49%,84%);">y</span> = <span class="variable" data-binding-hash="794745962933817518" style="color: hsl(19,74%,76%);">x</span>.<span class="unresolved_reference">to_string</span>();
}
<span class="keyword">fn</span> <span class="function declaration">bar</span>() {

29
crates/ra_ide/src/syntax_highlighting.rs
View file

@ -239,20 +239,21 @@ fn highlight_element(
NAME_REF if element.ancestors().any(|it| it.kind() == ATTR) => return None,
NAME_REF => {
let name_ref = element.into_node().and_then(ast::NameRef::cast).unwrap();
let name_kind = classify_name_ref(sema, &name_ref)?;
match name_kind {
NameRefClass::Definition(def) => {
if let Definition::Local(local) = &def {
if let Some(name) = local.name(db) {
let shadow_count =
bindings_shadow_count.entry(name.clone()).or_default();
binding_hash = Some(calc_binding_hash(&name, *shadow_count))
}
};
highlight_name(db, def)
}
NameRefClass::FieldShorthand { .. } => HighlightTag::Field.into(),
match classify_name_ref(sema, &name_ref) {
Some(name_kind) => match name_kind {
NameRefClass::Definition(def) => {
if let Definition::Local(local) = &def {
if let Some(name) = local.name(db) {
let shadow_count =
bindings_shadow_count.entry(name.clone()).or_default();
binding_hash = Some(calc_binding_hash(&name, *shadow_count))
}
};
highlight_name(db, def)
}
NameRefClass::FieldShorthand { .. } => HighlightTag::Field.into(),
},
None => HighlightTag::UnresolvedReference.into(),
}
}

2
crates/ra_ide/src/syntax_highlighting/tags.rs
View file

@ -38,6 +38,7 @@ pub enum HighlightTag {
TypeParam,
Union,
Local,
UnresolvedReference,
}
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
@ -79,6 +80,7 @@ impl HighlightTag {
HighlightTag::TypeParam => "type_param",
HighlightTag::Union => "union",
HighlightTag::Local => "variable",
HighlightTag::UnresolvedReference => "unresolved_reference",
}
}
}

5
crates/rust-analyzer/src/conv.rs
View file

@ -24,7 +24,9 @@ use crate::{
world::WorldSnapshot,
Result,
};
use semantic_tokens::{ATTRIBUTE, BUILTIN_TYPE, ENUM_MEMBER, LIFETIME, TYPE_ALIAS, UNION};
use semantic_tokens::{
ATTRIBUTE, BUILTIN_TYPE, ENUM_MEMBER, LIFETIME, TYPE_ALIAS, UNION, UNRESOLVED_REFERENCE,
};
pub trait Conv {
type Output;
@ -373,6 +375,7 @@ impl Conv for Highlight {
HighlightTag::Comment => SemanticTokenType::COMMENT,
HighlightTag::Attribute => ATTRIBUTE,
HighlightTag::Keyword => SemanticTokenType::KEYWORD,
HighlightTag::UnresolvedReference => UNRESOLVED_REFERENCE,
};
for modifier in self.modifiers.iter() {

3
crates/rust-analyzer/src/semantic_tokens.rs
View file

@ -10,6 +10,8 @@ pub(crate) const ENUM_MEMBER: SemanticTokenType = SemanticTokenType::new("enumMe
pub(crate) const LIFETIME: SemanticTokenType = SemanticTokenType::new("lifetime");
pub(crate) const TYPE_ALIAS: SemanticTokenType = SemanticTokenType::new("typeAlias");
pub(crate) const UNION: SemanticTokenType = SemanticTokenType::new("union");
pub(crate) const UNRESOLVED_REFERENCE: SemanticTokenType =
SemanticTokenType::new("unresolvedReference");
pub(crate) const CONSTANT: SemanticTokenModifier = SemanticTokenModifier::new("constant");
pub(crate) const CONTROL_FLOW: SemanticTokenModifier = SemanticTokenModifier::new("controlFlow");
@ -43,6 +45,7 @@ pub(crate) const SUPPORTED_TYPES: &[SemanticTokenType] = &[
LIFETIME,
TYPE_ALIAS,
UNION,
UNRESOLVED_REFERENCE,
];
pub(crate) const SUPPORTED_MODIFIERS: &[SemanticTokenModifier] = &[

4
editors/code/package.json
View file

@ -517,6 +517,10 @@
"id": "union",
"description": "Style for C-style untagged unions",
"superType": "type"
},
{
"id": "unresolvedReference",
"description": "Style for names which can not be resolved due to compilation errors"
}
],
"semanticTokenModifiers": [