Use unique declaration references #192
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -65,7 +65,21 @@ export class FileIndexer { | |
| if (ts.isIdentifier(node) || ts.isStringLiteralLike(node)) { | ||
| const sym = this.getTSSymbolAtLocation(node) | ||
| if (sym) { | ||
| /** | ||
|
There was a problem hiding this comment. I agree it's not super clear why |
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| * For example: | ||
| * | ||
| * const a = 1 | ||
| * ^ node | ||
| * ^ node.parent.name | ||
| * ^^^^^ node.parent | ||
| */ | ||
| const isDefinition = this.declarationName(node.parent) === node | ||
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| if (isDefinition) { | ||
| return this.indexDefinition(node, sym) | ||
| } | ||
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| this.indexReference(node, sym) | ||
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| } | ||
| } | ||
| ts.forEachChild(node, node => this.visit(node)) | ||
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@@ -97,42 +111,48 @@ export class FileIndexer { | |
| return symbol | ||
| } | ||
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| private indexDefinition(node: ts.Node, sym: ts.Symbol): void { | ||
| const [declaration] = sym?.declarations || [] | ||
| const scipSymbol = this.scipSymbol(declaration) | ||
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| if (scipSymbol.isEmpty()) { | ||
| return | ||
| } | ||
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| const range = Range.fromNode(node).toLsif() | ||
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| this.document.occurrences.push( | ||
| new scip.scip.Occurrence({ | ||
| range, | ||
| symbol: scipSymbol.value, | ||
| symbol_roles: scip.scip.SymbolRole.Definition, | ||
| }) | ||
| ) | ||
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| this.addSymbolInformation(node, sym, declaration, scipSymbol) | ||
| this.handleShorthandPropertyDefinition(declaration, range) | ||
| this.handleObjectBindingPattern(node, range) | ||
| } | ||
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| private indexReference(node: ts.Node, sym: ts.Symbol): void { | ||
| const range = Range.fromNode(node).toLsif() | ||
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| for (const symbol of this.uniqueDeclarationSymbolValues(sym)) { | ||
| this.document.occurrences.push( | ||
| new scip.scip.Occurrence({ | ||
| range, | ||
| symbol, | ||
| symbol_roles: scip.scip.SymbolRole.UnspecifiedSymbolRole, | ||
| }) | ||
| ) | ||
| } | ||
| } | ||
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| /** | ||
| * Emits an additional definition occurrence when destructuring an object | ||
| * pattern. For example: | ||
| * ``` | ||
| * interface Props { property: number } | ||
| * const props: Props[] = [{ property: 42 }] | ||
| * props.map(({property}) => property) = {a} | ||
| * // ^^^^^^^^ references `Props.property` and defines a local parameter `property` | ||
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@@ -148,15 +168,11 @@ export class FileIndexer { | |
| } | ||
| const tpe = this.checker.getTypeAtLocation(node.parent.parent) | ||
| const property = tpe.getProperty(node.getText()) | ||
| for (const symbol of this.uniqueDeclarationSymbolValues(property)) { | ||
| this.document.occurrences.push( | ||
| new scip.scip.Occurrence({ | ||
| range, | ||
| symbol, | ||
| }) | ||
| ) | ||
| } | ||
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@@ -233,6 +249,7 @@ export class FileIndexer { | |
| ): scip.scip.Relationship[] { | ||
| const relationships: scip.scip.Relationship[] = [] | ||
| const isAddedSymbol = new Set<string>() | ||
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| const pushImplementation = ( | ||
| node: ts.NamedDeclaration, | ||
| isReferences: boolean | ||
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@@ -305,7 +322,7 @@ export class FileIndexer { | |
| return undefined | ||
| } | ||
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| private scipSymbol = (node: ts.Node): ScipSymbol => { | ||
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| const fromCache: ScipSymbol | undefined = | ||
| this.globalSymbolTable.get(node) || this.localSymbolTable.get(node) | ||
| if (fromCache) { | ||
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@@ -361,7 +378,7 @@ export class FileIndexer { | |
| return this.scipSymbol(decl) | ||
| } | ||
| } catch { | ||
| // TODO: https://github.com/sourcegraph/scip-typescript/issues/34 | ||
| // continue regardless of error, the TypeScript compiler tends to | ||
| // trigger stack overflows in getTypeOfSymbolAtLocation and we | ||
| // don't know why yet. | ||
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@@ -378,7 +395,11 @@ export class FileIndexer { | |
| return this.cached(node, this.scipSymbol(node.parent)) | ||
| } | ||
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| if ( | ||
| ts.isImportSpecifier(node) || | ||
| ts.isImportClause(node) || | ||
| ts.isNamespaceImport(node) | ||
|
There was a problem hiding this comment. Is this change related to de-duplication? It would be nice to isolate this change and have a diff in the snapshot tests to better understand the exact motivation for this change. |
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| ) { | ||
| const tpe = this.checker.getTypeAtLocation(node) | ||
| for (const declaration of tpe.symbol?.declarations || []) { | ||
| return this.scipSymbol(declaration) | ||
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@@ -608,6 +629,25 @@ export class FileIndexer { | |
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| return this.checker.getTypeAtLocation(node) | ||
| } | ||
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| /** | ||
| * @param sym ts.Symbol with declarations to process. | ||
| * @returns an array of unique non-empty SCIP symbol values extracted | ||
| * from ts.Symbol declarations. | ||
| */ | ||
| private uniqueDeclarationSymbolValues(sym?: ts.Symbol): string[] { | ||
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| if (!sym?.declarations) { | ||
| return [] | ||
| } | ||
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| return Array.from( | ||
|
There was a problem hiding this comment. This expression is fairly expensive considering it's in a very hot loop and that we can achieve a similar results with a single if condition, as is done in It's very important that we try to keep performance parity with |
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| new Set( | ||
| sym.declarations | ||
| .map(declaration => this.scipSymbol(declaration).value) | ||
| .filter(Boolean) | ||
| ) | ||
| ) | ||
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| } | ||
| } | ||
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| function isAnonymousContainerOfSymbols(node: ts.Node): boolean { | ||
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I added new
test-fastandupdate-snapshots-fastscripts. I prefer to get the type errors in the terminal because typechecking is reasonably fast in this codebase and debugging runtime exceptions is slower than debugging type errors.There was a problem hiding this comment.
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Sounds good! To clarify the reasoning behind this: while iterating on changes locally, I often have type errors because I want to test some logic but don't want to invest time into making Typescript happy about it because there's no intent to commit it. Type-checking slows down the process of trying different ideas on existing tests.
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I'm +1 to adding these scripts to package.json as long as we keep the typechecking variants as well. For sg/sg, I appreciate that
sg startdoesn't typecheck because it's a big codebase slowing down the edit/reload/debug feedback loop. In scip-typescript, typechecking has been fast enough for my needs.