Function isNarrowableOperand

test/fixtures/snapshot/typescript.js:45411–45424

(expr)

            return false;
        }
        function isNarrowableOperand(expr) {
            switch (expr.kind) {
                case 212 /* SyntaxKind.ParenthesizedExpression */:
                    return isNarrowableOperand(expr.expression);
                case 221 /* SyntaxKind.BinaryExpression */:
                    switch (expr.operatorToken.kind) {
                        case 63 /* SyntaxKind.EqualsToken */:
                            return isNarrowableOperand(expr.left);
                        case 27 /* SyntaxKind.CommaToken */:
                            return isNarrowableOperand(expr.right);
                    }
            }
            return containsNarrowableReference(expr);
        }
        function createBranchLabel() {
            return initFlowNode({ flags: 4 /* FlowFlags.BranchLabel */, antecedents: undefined });
        }