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Merged
ahejlsberg merged 6 commits into from
Nov 17, 2025
Merged

Display inherited JSDoc documentation in quick info #2111

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627d866
Display inherited JSDoc documentation in quick info
ahejlsberg Nov 17, 2025
2f03c6b
Accept new baselines
ahejlsberg Nov 17, 2025
00febb7
Update fourslash test
ahejlsberg Nov 17, 2025
2088eb6
Merge branch 'main' into fix-2035
ahejlsberg Nov 17, 2025
edd0e5a
Check for nil parent
ahejlsberg Nov 17, 2025
2ff4b9d
Change generated test to manual
ahejlsberg Nov 17, 2025
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4 changes: 4 additions & 0 deletions internal/checker/exports.go
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Original file line number Diff line number Diff line change
Expand Up @@ -182,3 +182,7 @@ func (c *Checker) ResolveName(name string, location *ast.Node, meaning ast.Symbo
func (c *Checker) GetSymbolFlags(symbol *ast.Symbol) ast.SymbolFlags {
return c.getSymbolFlags(symbol)
}

func (c *Checker) GetBaseTypes(t *Type) []*Type {
return c.getBaseTypes(t)
}
2 changes: 1 addition & 1 deletion internal/fourslash/tests/gen/quickInfoForOverloadOnConst1_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,7 @@ c.x1(1, (x/*10*/x) => { return 1; } );`
f.VerifyQuickInfoAt(t, "1", "(method) I.x1(a: number, callback: (x: \"hi\") => number): any", "")
f.VerifyQuickInfoAt(t, "2", "(method) C.x1(a: number, callback: (x: \"hi\") => number): any", "")
f.VerifyQuickInfoAt(t, "3", "(parameter) callback: (x: \"hi\") => number", "")
f.VerifyQuickInfoAt(t, "4", "(method) C.x1(a: number, callback: (x: \"hi\") => number): any", "")
f.VerifyQuickInfoAt(t, "4", "(method) C.x1(a: number, callback: (x: string) => number): void", "")
f.VerifyQuickInfoAt(t, "5", "(parameter) callback: (x: string) => number", "")
f.VerifyQuickInfoAt(t, "6", "(parameter) callback: (x: string) => number", "")
f.VerifyQuickInfoAt(t, "7", "(method) C.x1(a: number, callback: (x: \"hi\") => number): any", "")
Expand Down
87 changes: 53 additions & 34 deletions internal/ls/hover.go
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Original file line number Diff line number Diff line change
Expand Up @@ -72,7 +72,7 @@ func (l *LanguageService) getDocumentationFromDeclaration(c *checker.Checker, de
}
isMarkdown := contentFormat == lsproto.MarkupKindMarkdown
var b strings.Builder
if jsdoc := getJSDocOrTag(declaration); jsdoc != nil && !containsTypedefTag(jsdoc) {
if jsdoc := getJSDocOrTag(c, declaration); jsdoc != nil && !containsTypedefTag(jsdoc) {
l.writeComments(&b, c, jsdoc.Comments(), isMarkdown)
if jsdoc.Kind == ast.KindJSDoc {
if tags := jsdoc.AsJSDoc().Tags; tags != nil {
Expand Down Expand Up @@ -143,14 +143,6 @@ func getQuickInfoAndDeclarationAtLocation(c *checker.Checker, symbol *ast.Symbol
return "", nil
}
declaration := symbol.ValueDeclaration
if symbol.Flags&ast.SymbolFlagsClass != 0 && inConstructorContext(node) {
if s := symbol.Members[ast.InternalSymbolNameConstructor]; s != nil {
symbol = s
declaration = core.Find(symbol.Declarations, func(d *ast.Node) bool {
return ast.IsConstructorDeclaration(d) || ast.IsConstructSignatureDeclaration(d)
})
}
}
flags := symbol.Flags
if flags&ast.SymbolFlagsProperty != 0 && declaration != nil && ast.IsMethodDeclaration(declaration) {
flags = ast.SymbolFlagsMethod
Expand Down Expand Up @@ -209,30 +201,43 @@ func getQuickInfoAndDeclarationAtLocation(c *checker.Checker, symbol *ast.Symbol
b.WriteString(t.AsLiteralType().String())
}
case flags&(ast.SymbolFlagsFunction|ast.SymbolFlagsMethod) != 0:
signatures := getSignaturesAtLocation(c, symbol, checker.SignatureKindCall, node)
if len(signatures) == 1 {
if d := signatures[0].Declaration(); d != nil && d.Flags&ast.NodeFlagsJSDoc == 0 {
declaration = d
}
}
prefix := core.IfElse(flags&ast.SymbolFlagsMethod != 0, "(method) ", "function ")
writeSignatures(&b, c, signatures, container, prefix, symbol)
case flags&ast.SymbolFlagsConstructor != 0:
signatures := getSignaturesAtLocation(c, symbol.Parent, checker.SignatureKindConstruct, node)
if len(signatures) == 1 {
if d := signatures[0].Declaration(); d != nil && d.Flags&ast.NodeFlagsJSDoc == 0 {
declaration = d
if ast.IsIdentifier(node) && ast.IsFunctionLikeDeclaration(node.Parent) && node.Parent.Name() == node {
declaration = node.Parent
signatures := []*checker.Signature{c.GetSignatureFromDeclaration(declaration)}
writeSignatures(&b, c, signatures, container, prefix, symbol)
} else {
signatures := getSignaturesAtLocation(c, symbol, checker.SignatureKindCall, node)
if len(signatures) == 1 {
if d := signatures[0].Declaration(); d != nil && d.Flags&ast.NodeFlagsJSDoc == 0 {
declaration = d
}
}
writeSignatures(&b, c, signatures, container, prefix, symbol)
}
writeSignatures(&b, c, signatures, container, "constructor ", symbol.Parent)
case flags&(ast.SymbolFlagsClass|ast.SymbolFlagsInterface) != 0:
if node.Kind == ast.KindThisKeyword || ast.IsThisInTypeQuery(node) {
b.WriteString("this")
} else if node.Kind == ast.KindConstructorKeyword && (ast.IsConstructorDeclaration(node.Parent) || ast.IsConstructSignatureDeclaration(node.Parent)) {
declaration = node.Parent
signatures := []*checker.Signature{c.GetSignatureFromDeclaration(declaration)}
writeSignatures(&b, c, signatures, container, "constructor ", symbol)
} else {
b.WriteString(core.IfElse(flags&ast.SymbolFlagsClass != 0, "class ", "interface "))
b.WriteString(c.SymbolToStringEx(symbol, container, ast.SymbolFlagsNone, symbolFormatFlags))
params := c.GetDeclaredTypeOfSymbol(symbol).AsInterfaceType().LocalTypeParameters()
writeTypeParams(&b, c, params)
var signatures []*checker.Signature
if flags&ast.SymbolFlagsClass != 0 && getCallOrNewExpression(node) != nil {
signatures = getSignaturesAtLocation(c, symbol, checker.SignatureKindConstruct, node)
Comment on lines +227 to +228
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Copilot AI Nov 17, 2025

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The condition getCallOrNewExpression(node) != nil matches both call and new expressions, but construct signatures should only be retrieved for new expressions. When hovering over a class name in a call expression context (e.g., MyClass()), this code would incorrectly attempt to get construct signatures. Consider checking specifically for new expressions using ast.IsNewExpression(callOrNewExpr) to ensure construct signatures are only shown in the appropriate context.

Suggested change
if flags&ast.SymbolFlagsClass != 0 && getCallOrNewExpression(node) != nil {
signatures = getSignaturesAtLocation(c, symbol, checker.SignatureKindConstruct, node)
if flags&ast.SymbolFlagsClass != 0 {
callOrNewExpr := getCallOrNewExpression(node)
if callOrNewExpr != nil && ast.IsNewExpression(callOrNewExpr) {
signatures = getSignaturesAtLocation(c, symbol, checker.SignatureKindConstruct, node)
}

Copilot uses AI. Check for mistakes.
}
if len(signatures) == 1 {
if d := signatures[0].Declaration(); d != nil && d.Flags&ast.NodeFlagsJSDoc == 0 {
declaration = d
}
writeSignatures(&b, c, signatures, container, "constructor ", symbol)
} else {
b.WriteString(core.IfElse(flags&ast.SymbolFlagsClass != 0, "class ", "interface "))
b.WriteString(c.SymbolToStringEx(symbol, container, ast.SymbolFlagsNone, symbolFormatFlags))
params := c.GetDeclaredTypeOfSymbol(symbol).AsInterfaceType().LocalTypeParameters()
writeTypeParams(&b, c, params)
}
}
if flags&ast.SymbolFlagsInterface != 0 {
declaration = core.Find(symbol.Declarations, ast.IsInterfaceDeclaration)
Expand Down Expand Up @@ -381,7 +386,7 @@ func containsTypedefTag(jsdoc *ast.Node) bool {
if jsdoc.Kind == ast.KindJSDoc {
if tags := jsdoc.AsJSDoc().Tags; tags != nil {
for _, tag := range tags.Nodes {
if tag.Kind == ast.KindJSDocTypedefTag {
if tag.Kind == ast.KindJSDocTypedefTag || tag.Kind == ast.KindJSDocCallbackTag {
return true
}
}
Expand All @@ -398,26 +403,40 @@ func getJSDoc(node *ast.Node) *ast.Node {
return core.LastOrNil(node.JSDoc(nil))
}

func getJSDocOrTag(node *ast.Node) *ast.Node {
func getJSDocOrTag(c *checker.Checker, node *ast.Node) *ast.Node {
if jsdoc := getJSDoc(node); jsdoc != nil {
return jsdoc
}
switch {
case ast.IsParameter(node):
return getMatchingJSDocTag(node.Parent, node.Name().Text(), isMatchingParameterTag)
return getMatchingJSDocTag(c, node.Parent, node.Name().Text(), isMatchingParameterTag)
case ast.IsTypeParameterDeclaration(node):
return getMatchingJSDocTag(node.Parent, node.Name().Text(), isMatchingTemplateTag)
return getMatchingJSDocTag(c, node.Parent, node.Name().Text(), isMatchingTemplateTag)
case ast.IsVariableDeclaration(node) && ast.IsVariableDeclarationList(node.Parent) && core.FirstOrNil(node.Parent.AsVariableDeclarationList().Declarations.Nodes) == node:
return getJSDocOrTag(node.Parent.Parent)
return getJSDocOrTag(c, node.Parent.Parent)
case (ast.IsFunctionExpressionOrArrowFunction(node) || ast.IsClassExpression(node)) &&
(ast.IsVariableDeclaration(node.Parent) || ast.IsPropertyDeclaration(node.Parent) || ast.IsPropertyAssignment(node.Parent)) && node.Parent.Initializer() == node:
return getJSDocOrTag(node.Parent)
return getJSDocOrTag(c, node.Parent)
}
if symbol := node.Symbol(); symbol != nil && node.Parent != nil && ast.IsClassOrInterfaceLike(node.Parent) {
isStatic := ast.HasStaticModifier(node)
for _, baseType := range c.GetBaseTypes(c.GetDeclaredTypeOfSymbol(node.Parent.Symbol())) {
t := baseType
if isStatic {
t = c.GetTypeOfSymbol(baseType.Symbol())
}
if prop := c.GetPropertyOfType(t, symbol.Name); prop != nil && prop.ValueDeclaration != nil {
if jsDoc := getJSDocOrTag(c, prop.ValueDeclaration); jsDoc != nil {
return jsDoc
}
}
}
}
return nil
}

func getMatchingJSDocTag(node *ast.Node, name string, match func(*ast.Node, string) bool) *ast.Node {
if jsdoc := getJSDocOrTag(node); jsdoc != nil && jsdoc.Kind == ast.KindJSDoc {
func getMatchingJSDocTag(c *checker.Checker, node *ast.Node, name string, match func(*ast.Node, string) bool) *ast.Node {
if jsdoc := getJSDocOrTag(c, node); jsdoc != nil && jsdoc.Kind == ast.KindJSDoc {
if tags := jsdoc.AsJSDoc().Tags; tags != nil {
for _, tag := range tags.Nodes {
if match(tag, name) {
Expand Down
4 changes: 2 additions & 2 deletions testdata/baselines/reference/fourslash/quickInfo/jsdocOnInheritedMembers1.baseline
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Expand Up @@ -18,7 +18,7 @@
// | ```tsx
// | (method) B.method(): void
// | ```
// |
// | Method documentation.
// | ----------------------------------------------------------------------
[
{
Expand All @@ -34,7 +34,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\n(method) B.method(): void\n```\n"
"value": "```tsx\n(method) B.method(): void\n```\nMethod documentation."
},
"range": {
"start": {
Expand Down
4 changes: 2 additions & 2 deletions testdata/baselines/reference/fourslash/quickInfo/jsdocOnInheritedMembers2.baseline
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@
// | ```tsx
// | (method) B.method(): void
// | ```
// |
// | Method documentation.
// | ----------------------------------------------------------------------
[
{
Expand All @@ -34,7 +34,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\n(method) B.method(): void\n```\n"
"value": "```tsx\n(method) B.method(): void\n```\nMethod documentation."
},
"range": {
"start": {
Expand Down
8 changes: 4 additions & 4 deletions testdata/baselines/reference/fourslash/quickInfo/quickInfoCommentsClass.baseline
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Expand Up @@ -21,7 +21,7 @@
// ^^
// | ----------------------------------------------------------------------
// | ```tsx
// | class c2
// | constructor c2(): c2
// | ```
// | This is class c2 without constructor
// | ----------------------------------------------------------------------
Expand Down Expand Up @@ -147,7 +147,7 @@
// ^^
// | ----------------------------------------------------------------------
// | ```tsx
// | class c5
// | constructor c5(): c5
// | ```
// | Class with statics
// | ----------------------------------------------------------------------
Expand Down Expand Up @@ -307,7 +307,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\nclass c2\n```\nThis is class c2 without constructor"
"value": "```tsx\nconstructor c2(): c2\n```\nThis is class c2 without constructor"
},
"range": {
"start": {
Expand Down Expand Up @@ -712,7 +712,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\nclass c5\n```\nClass with statics"
"value": "```tsx\nconstructor c5(): c5\n```\nClass with statics"
},
"range": {
"start": {
Expand Down
4 changes: 2 additions & 2 deletions testdata/baselines/reference/fourslash/quickInfo/quickInfoDisplayPartsClass.baseline
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@
// ^
// | ----------------------------------------------------------------------
// | ```tsx
// | class c
// | constructor c(): c
// | ```
// |
// | ----------------------------------------------------------------------
Expand Down Expand Up @@ -107,7 +107,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\nclass c\n```\n"
"value": "```tsx\nconstructor c(): c\n```\n"
},
"range": {
"start": {
Expand Down
29 changes: 9 additions & 20 deletions ...ta/baselines/reference/fourslash/quickInfo/quickInfoDisplayPartsClassConstructor.baseline
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Expand Up @@ -47,15 +47,13 @@
// | ----------------------------------------------------------------------
// | ```tsx
// | constructor cWithOverloads(x: string): cWithOverloads
// | constructor cWithOverloads(x: number): cWithOverloads
// | ```
// |
// | ----------------------------------------------------------------------
// constructor(x: number);
// ^^^^^^^^^^^
// | ----------------------------------------------------------------------
// | ```tsx
// | constructor cWithOverloads(x: string): cWithOverloads
// | constructor cWithOverloads(x: number): cWithOverloads
// | ```
// |
Expand All @@ -64,8 +62,7 @@
// ^^^^^^^^^^^
// | ----------------------------------------------------------------------
// | ```tsx
// | constructor cWithOverloads(x: string): cWithOverloads
// | constructor cWithOverloads(x: number): cWithOverloads
// | constructor cWithOverloads(x: any): cWithOverloads
// | ```
// |
// | ----------------------------------------------------------------------
Expand Down Expand Up @@ -122,27 +119,21 @@
// | ----------------------------------------------------------------------
// | ```tsx
// | constructor cWithMultipleOverloads(x: string): cWithMultipleOverloads
// | constructor cWithMultipleOverloads(x: number): cWithMultipleOverloads
// | constructor cWithMultipleOverloads(x: boolean): cWithMultipleOverloads
// | ```
// |
// | ----------------------------------------------------------------------
// constructor(x: number);
// ^^^^^^^^^^^
// | ----------------------------------------------------------------------
// | ```tsx
// | constructor cWithMultipleOverloads(x: string): cWithMultipleOverloads
// | constructor cWithMultipleOverloads(x: number): cWithMultipleOverloads
// | constructor cWithMultipleOverloads(x: boolean): cWithMultipleOverloads
// | ```
// |
// | ----------------------------------------------------------------------
// constructor(x: boolean);
// ^^^^^^^^^^^
// | ----------------------------------------------------------------------
// | ```tsx
// | constructor cWithMultipleOverloads(x: string): cWithMultipleOverloads
// | constructor cWithMultipleOverloads(x: number): cWithMultipleOverloads
// | constructor cWithMultipleOverloads(x: boolean): cWithMultipleOverloads
// | ```
// |
Expand All @@ -151,9 +142,7 @@
// ^^^^^^^^^^^
// | ----------------------------------------------------------------------
// | ```tsx
// | constructor cWithMultipleOverloads(x: string): cWithMultipleOverloads
// | constructor cWithMultipleOverloads(x: number): cWithMultipleOverloads
// | constructor cWithMultipleOverloads(x: boolean): cWithMultipleOverloads
// | constructor cWithMultipleOverloads(x: any): cWithMultipleOverloads
// | ```
// |
// | ----------------------------------------------------------------------
Expand Down Expand Up @@ -368,7 +357,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\nconstructor cWithOverloads(x: string): cWithOverloads\nconstructor cWithOverloads(x: number): cWithOverloads\n```\n"
"value": "```tsx\nconstructor cWithOverloads(x: string): cWithOverloads\n```\n"
},
"range": {
"start": {
Expand All @@ -395,7 +384,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\nconstructor cWithOverloads(x: string): cWithOverloads\nconstructor cWithOverloads(x: number): cWithOverloads\n```\n"
"value": "```tsx\nconstructor cWithOverloads(x: number): cWithOverloads\n```\n"
},
"range": {
"start": {
Expand All @@ -422,7 +411,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\nconstructor cWithOverloads(x: string): cWithOverloads\nconstructor cWithOverloads(x: number): cWithOverloads\n```\n"
"value": "```tsx\nconstructor cWithOverloads(x: any): cWithOverloads\n```\n"
},
"range": {
"start": {
Expand Down Expand Up @@ -611,7 +600,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\nconstructor cWithMultipleOverloads(x: string): cWithMultipleOverloads\nconstructor cWithMultipleOverloads(x: number): cWithMultipleOverloads\nconstructor cWithMultipleOverloads(x: boolean): cWithMultipleOverloads\n```\n"
"value": "```tsx\nconstructor cWithMultipleOverloads(x: string): cWithMultipleOverloads\n```\n"
},
"range": {
"start": {
Expand All @@ -638,7 +627,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\nconstructor cWithMultipleOverloads(x: string): cWithMultipleOverloads\nconstructor cWithMultipleOverloads(x: number): cWithMultipleOverloads\nconstructor cWithMultipleOverloads(x: boolean): cWithMultipleOverloads\n```\n"
"value": "```tsx\nconstructor cWithMultipleOverloads(x: number): cWithMultipleOverloads\n```\n"
},
"range": {
"start": {
Expand All @@ -665,7 +654,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\nconstructor cWithMultipleOverloads(x: string): cWithMultipleOverloads\nconstructor cWithMultipleOverloads(x: number): cWithMultipleOverloads\nconstructor cWithMultipleOverloads(x: boolean): cWithMultipleOverloads\n```\n"
"value": "```tsx\nconstructor cWithMultipleOverloads(x: boolean): cWithMultipleOverloads\n```\n"
},
"range": {
"start": {
Expand All @@ -692,7 +681,7 @@
"item": {
"contents": {
"kind": "markdown",
"value": "```tsx\nconstructor cWithMultipleOverloads(x: string): cWithMultipleOverloads\nconstructor cWithMultipleOverloads(x: number): cWithMultipleOverloads\nconstructor cWithMultipleOverloads(x: boolean): cWithMultipleOverloads\n```\n"
"value": "```tsx\nconstructor cWithMultipleOverloads(x: any): cWithMultipleOverloads\n```\n"
},
"range": {
"start": {
Expand Down
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