Function getNameableDeclarationAtPosition

test/fixtures/snapshot/typescript.js:77529–77543

(signature, pos)

            return d.kind === 197 /* SyntaxKind.NamedTupleMember */ || (ts.isParameter(d) && d.name && ts.isIdentifier(d.name));
        }
        function getNameableDeclarationAtPosition(signature, pos) {
            var paramCount = signature.parameters.length - (signatureHasRestParameter(signature) ? 1 : 0);
            if (pos < paramCount) {
                var decl = signature.parameters[pos].valueDeclaration;
                return decl && isValidDeclarationForTupleLabel(decl) ? decl : undefined;
            }
            var restParameter = signature.parameters[paramCount] || unknownSymbol;
            var restType = getTypeOfSymbol(restParameter);
            if (isTupleType(restType)) {
                var associatedNames = restType.target.labeledElementDeclarations;
                var index = pos - paramCount;
                return associatedNames && associatedNames[index];
            }
            return restParameter.valueDeclaration && isValidDeclarationForTupleLabel(restParameter.valueDeclaration) ? restParameter.valueDeclaration : undefined;
        }
        function getTypeAtPosition(signature, pos) {
            return tryGetTypeAtPosition(signature, pos) || anyType;
        }