Method ProvideTypeDefinition

internal/ls/definition.go:100–135

(
	ctx context.Context,
	documentURI lsproto.DocumentUri,
	position lsproto.Position,
)

}

func (l *LanguageService) ProvideTypeDefinition(
	ctx context.Context,
	documentURI lsproto.DocumentUri,
	position lsproto.Position,
) (lsproto.TypeDefinitionResponse, error) {
	caps := lsproto.GetClientCapabilities(ctx)
	clientSupportsLink := caps.TextDocument.TypeDefinition.LinkSupport

	program, file := l.getProgramAndFile(documentURI)
	node := astnav.GetTouchingPropertyName(file, int(l.converters.LineAndCharacterToPosition(file, position)))
	if node.Kind == ast.KindSourceFile {
		return lsproto.LocationOrLocationsOrDefinitionLinksOrNull{}, nil
	}
	originSelectionRange := l.createLspRangeFromNode(node, file)

	c, done := program.GetTypeCheckerForFile(ctx, file)
	defer done()

	node = getDeclarationNameForKeyword(node)

	if symbol := c.GetSymbolAtLocation(node); symbol != nil {
		symbolType := getTypeOfSymbolAtLocation(c, symbol, node)
		declarations := getDeclarationsFromType(symbolType)
		if typeArgument := c.GetFirstTypeArgumentFromKnownType(symbolType); typeArgument != nil {
			declarations = core.Concatenate(getDeclarationsFromType(typeArgument), declarations)
		}
		if len(declarations) != 0 {
			return l.createDefinitionLocations(originSelectionRange, clientSupportsLink, declarations, nil /*reference*/), nil
		}
		if symbol.Flags&ast.SymbolFlagsValue == 0 && symbol.Flags&ast.SymbolFlagsType != 0 {
			return l.createDefinitionLocations(originSelectionRange, clientSupportsLink, symbol.Declarations, nil /*reference*/), nil
		}
	}

	return lsproto.LocationOrLocationsOrDefinitionLinksOrNull{}, nil
}

func getDeclarationNameForKeyword(node *ast.Node) *ast.Node {
	if node.Kind >= ast.KindFirstKeyword && node.Kind <= ast.KindLastKeyword {