// a (possibly parenthesized) built-in function.
func (tv TypeAndValue) IsBuiltin() bool {
	return tv.mode == builtin
}

// IsValue reports whether the corresponding expression is a value.
// Builtins are not considered values. Constant values have a non-
// nil Value.
func (tv TypeAndValue) IsValue() bool {
	switch tv.mode {
	case constant_, variable, mapindex, value, nilvalue, commaok, commaerr:
		return true
	}

// a (possibly parenthesized) built-in function.
func (tv TypeAndValue) IsBuiltin() bool {
	return tv.mode == builtin
}

// IsValue reports whether the corresponding expression is a value.
// Builtins are not considered values. Constant values have a non-
// nil Value.
func (tv TypeAndValue) IsValue() bool {
	switch tv.mode {
	case constant_, variable, mapindex, value, commaok, commaerr:
		return true
	}
	return false
}

	// struct changing into a string or nil.
	if vr, ok := nv.Value.(driver.Valuer); ok {
		sv, err := callValuerValue(vr)
		if err != nil {
			return err
		}
		if !driver.IsValue(sv) {
			return fmt.Errorf("non-subset type %T returned from Value", sv)
		}
		nv.Value = sv
	}

	// Second, ask the column to sanity check itself. For
	// example, drivers might use this to make sure that

		if _, ok := astutil.Unparen(star.X).(*ast.CallExpr); ok {
			// A call may return a pointer to a zero value.
			return nil
		}
	}
	if tv, ok := pass.TypesInfo.Types[x]; ok && tv.IsValue() {
		return lockPath(pass.Pkg, tv.Type, nil)
	}
	return nil
}

// lockPath returns a typePath describing the location of a lock value
// contained in typ. If there is no contained lock, it returns nil.
//

- Property 'name' is not valid: it must not have a setter, because the type implements '$Named.name'"""
    }

    @Managed
    static interface HasIsAndGetPropertyWithDifferentTypes {
        boolean isValue()
        String getValue()
    }

    def "handles is/get property with non-matching type"() {
        when: extract HasIsAndGetPropertyWithDifferentTypes
        then: def ex = thrown InvalidManagedTypeException

		stv := syntax.TypeAndValue{Type: typ, Value: val}
		if tv.IsVoid() {
			stv.SetIsVoid()
		}
		if tv.IsType() {
			stv.SetIsType()
		}
		if tv.IsBuiltin() {
			stv.SetIsBuiltin()
		}
		if tv.IsValue() {
			stv.SetIsValue()
		}
		if tv.IsNil() {
			stv.SetIsNil()
		}
		if tv.Addressable() {
			stv.SetAddressable()
		}
		if tv.Assignable() {
			stv.SetAssignable()
		}

pkg go/types, method (TypeAndValue) IsBuiltin() bool
pkg go/types, method (TypeAndValue) IsNil() bool
pkg go/types, method (TypeAndValue) IsType() bool
pkg go/types, method (TypeAndValue) IsValue() bool
pkg go/types, method (TypeAndValue) IsVoid() bool
pkg go/types, type Array struct
pkg go/types, type Basic struct
pkg go/types, type BasicInfo int
pkg go/types, type BasicKind int

		case v == nil && sValue != nil:
			check.softErrorf(sValue, InvalidIterVar, "range over %s permits only one iteration variable", &x)
		case sExtra != nil:
			check.softErrorf(sExtra, InvalidIterVar, "range clause permits at most two iteration variables")
		case isFunc && ((k == nil) != (sKey == nil) || (v == nil) != (sValue == nil)):
			var count string
			switch {
			case k == nil:

		case v == nil && sValue != nil:
			check.softErrorf(sValue, InvalidIterVar, "range over %s permits only one iteration variable", &x)
		case sExtra != nil:
			check.softErrorf(sExtra, InvalidIterVar, "range clause permits at most two iteration variables")
		case isFunc && ((k == nil) != (sKey == nil) || (v == nil) != (sValue == nil)):
			var count string
			switch {
			case k == nil:

				return false
			}
		}
		return (r.operator == selection.GreaterThan && lsValue > rValue) || (r.operator == selection.LessThan && lsValue < rValue)
	default:
		return false
	}
}

// Key returns requirement key
func (r *Requirement) Key() string {
	return r.key
}