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42 lines
992 B
42 lines
992 B
5 years ago
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package pretty
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import (
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"reflect"
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)
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func nonzero(v reflect.Value) bool {
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switch v.Kind() {
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case reflect.Bool:
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return v.Bool()
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return v.Int() != 0
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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return v.Uint() != 0
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case reflect.Float32, reflect.Float64:
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return v.Float() != 0
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case reflect.Complex64, reflect.Complex128:
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return v.Complex() != complex(0, 0)
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case reflect.String:
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return v.String() != ""
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case reflect.Struct:
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for i := 0; i < v.NumField(); i++ {
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if nonzero(getField(v, i)) {
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return true
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}
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}
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return false
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case reflect.Array:
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for i := 0; i < v.Len(); i++ {
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if nonzero(v.Index(i)) {
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return true
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}
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}
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return false
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case reflect.Map, reflect.Interface, reflect.Slice, reflect.Ptr, reflect.Chan, reflect.Func:
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return !v.IsNil()
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case reflect.UnsafePointer:
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return v.Pointer() != 0
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}
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return true
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}
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