Method FromType

checker/nature/nature.go:118–148

FromType returns a Nature describing a value of type "t". If "t" is nil then it returns a Nature describing an unknown value.

(t reflect.Type)

// FromType returns a Nature describing a value of type "t". If "t" is nil then
// it returns a Nature describing an unknown value.
func (c *Cache) FromType(t reflect.Type) Nature {
	if t == nil {
		return Nature{}
	}
	var td *TypeData
	var isInteger, isFloat bool
	k := t.Kind()
	switch k {
	case reflect.Struct:
		// c can be nil when we call the package function FromType, which uses a
		// nil *Cache to call this method.
		if c != nil {
			return c.getStruct(t)
		}
		fallthrough
	case reflect.Func:
		td = new(TypeData)
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
		_, isInteger = builtinInt[t]
	case reflect.Float32, reflect.Float64:
		_, isFloat = builtinFloat[t]
	}
	return Nature{
		Type:      t,
		Kind:      k,
		TypeData:  td,
		IsInteger: isInteger,
		IsFloat:   isFloat,
	}
}

func (c *Cache) getStruct(t reflect.Type) Nature {
	if c.structs == nil {