Function isValidConstAssertionArgument

test/fixtures/snapshot/typescript.js:77290–77319

(node)

            return checkAssertionWorker(node, node.type, node.expression);
        }
        function isValidConstAssertionArgument(node) {
            switch (node.kind) {
                case 10 /* SyntaxKind.StringLiteral */:
                case 14 /* SyntaxKind.NoSubstitutionTemplateLiteral */:
                case 8 /* SyntaxKind.NumericLiteral */:
                case 9 /* SyntaxKind.BigIntLiteral */:
                case 110 /* SyntaxKind.TrueKeyword */:
                case 95 /* SyntaxKind.FalseKeyword */:
                case 204 /* SyntaxKind.ArrayLiteralExpression */:
                case 205 /* SyntaxKind.ObjectLiteralExpression */:
                case 223 /* SyntaxKind.TemplateExpression */:
                    return true;
                case 212 /* SyntaxKind.ParenthesizedExpression */:
                    return isValidConstAssertionArgument(node.expression);
                case 219 /* SyntaxKind.PrefixUnaryExpression */:
                    var op = node.operator;
                    var arg = node.operand;
                    return op === 40 /* SyntaxKind.MinusToken */ && (arg.kind === 8 /* SyntaxKind.NumericLiteral */ || arg.kind === 9 /* SyntaxKind.BigIntLiteral */) ||
                        op === 39 /* SyntaxKind.PlusToken */ && arg.kind === 8 /* SyntaxKind.NumericLiteral */;
                case 206 /* SyntaxKind.PropertyAccessExpression */:
                case 207 /* SyntaxKind.ElementAccessExpression */:
                    var expr = node.expression;
                    var symbol = getTypeOfNode(expr).symbol;
                    if (symbol && symbol.flags & 2097152 /* SymbolFlags.Alias */) {
                        symbol = resolveAlias(symbol);
                    }
                    return !!(symbol && (symbol.flags & 384 /* SymbolFlags.Enum */) && getEnumKind(symbol) === 1 /* EnumKind.Literal */);
            }
            return false;
        }
        function checkAssertionWorker(errNode, type, expression, checkMode) {
            var exprType = checkExpression(expression, checkMode);
            if (ts.isConstTypeReference(type)) {