Fixed panic ins typed nil coalesce

gval.go

@@ -103,10 +103,11 @@ var full = NewLanguage(arithmetic, bitmask, text, propositionalLogic, ljson,
  InfixOperator("in", inArray),
 
  InfixShortCircuit("??", func(a interface{}) (interface{}, bool) {
- return a, a != false && a != nil
+ v := reflect.ValueOf(a)
+ return a, a != nil && !v.IsZero()
  }),
  InfixOperator("??", func(a, b interface{}) (interface{}, error) {
- if a == false || a == nil {
+ if v := reflect.ValueOf(a); a == nil || v.IsZero() {
  return b, nil
  }
  return a, nil

gval_parameterized_test.go

@@ -592,6 +592,22 @@ func TestParameterized(t *testing.T) {
  },
  want: 1.,
  },
+ {
+ name: "coalesce typed nil 0",
+ expression: `ProjectID ?? 0`,
+ parameter: struct {
+ ProjectID *uint
+ }{},
+ want: 0.,
+ },
+ {
+ name: "coalesce typed nil 99",
+ expression: `ProjectID ?? 99`,
+ parameter: struct {
+ ProjectID *uint
+ }{},
+ want: 99.,
+ },
  },
  t,
  )

operator.go

@@ -133,6 +133,9 @@ func convertToBool(o interface{}) (bool, bool) {
  v := reflect.ValueOf(o)
  for o != nil && v.Kind() == reflect.Ptr {
  v = v.Elem()
+ if !v.IsValid() {
+ return false, false
+ }
  o = v.Interface()
  }
  if o == false || o == nil || o == "false" || o == "FALSE" {
@@ -173,6 +176,9 @@ func convertToFloat(o interface{}) (float64, bool) {
  v := reflect.ValueOf(o)
  for o != nil && v.Kind() == reflect.Ptr {
  v = v.Elem()
+ if !v.IsValid() {
+ return 0, false
+ }
  o = v.Interface()
  }
  switch v.Kind() {