tests/cases/conformance/parser/ecmascript5/Expressions/parserUnaryExpression5.ts(1,4): error TS2356: An arithmetic operand must be of type 'any', 'number' or an enum type.
tests/cases/conformance/parser/ecmascript5/Expressions/parserUnaryExpression5.ts(1,11): error TS2304: Cannot find name 'foo'.