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https://github.com/kemko/nomad.git
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15fb4c990a
This PR switches the Nomad repository from using govendor to Go modules for managing dependencies. Aspects of the Nomad workflow remain pretty much the same. The usual Makefile targets should continue to work as they always did. The API submodule simply defers to the parent Nomad version on the repository, keeping the semantics of API versioning that currently exists.
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
// Copyright 2017, The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE.md file.
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package value
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import (
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"math"
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"reflect"
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)
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// IsZero reports whether v is the zero value.
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// This does not rely on Interface and so can be used on unexported fields.
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func IsZero(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() == false
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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 math.Float64bits(v.Float()) == 0
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case reflect.Complex64, reflect.Complex128:
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return math.Float64bits(real(v.Complex())) == 0 && math.Float64bits(imag(v.Complex())) == 0
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case reflect.String:
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return v.String() == ""
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case reflect.UnsafePointer:
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return v.Pointer() == 0
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case reflect.Chan, reflect.Func, reflect.Interface, reflect.Ptr, reflect.Map, reflect.Slice:
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return v.IsNil()
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case reflect.Array:
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for i := 0; i < v.Len(); i++ {
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if !IsZero(v.Index(i)) {
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return false
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}
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}
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return true
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case reflect.Struct:
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for i := 0; i < v.NumField(); i++ {
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if !IsZero(v.Field(i)) {
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return false
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}
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}
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return true
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}
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return false
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}
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