10430f0b7f
This starts the work of having a `NodeProvider` which is responsible for providing node details. It splits the responsibilities of node management off to a new controller. The primary change here is to add the framework pieces for node management and move the VK CLI to use this new controller. It also adds support for node leases where available. This can be enabled via the command line (disabled by default), but may fall back if we find that leaess aren't supported on the cluster.
50 lines
1.2 KiB
Go
50 lines
1.2 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 function identifies function types.
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package function
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import "reflect"
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type funcType int
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const (
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_ funcType = iota
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ttbFunc // func(T, T) bool
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tibFunc // func(T, I) bool
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trFunc // func(T) R
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Equal = ttbFunc // func(T, T) bool
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EqualAssignable = tibFunc // func(T, I) bool; encapsulates func(T, T) bool
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Transformer = trFunc // func(T) R
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ValueFilter = ttbFunc // func(T, T) bool
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Less = ttbFunc // func(T, T) bool
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)
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var boolType = reflect.TypeOf(true)
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// IsType reports whether the reflect.Type is of the specified function type.
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func IsType(t reflect.Type, ft funcType) bool {
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if t == nil || t.Kind() != reflect.Func || t.IsVariadic() {
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return false
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}
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ni, no := t.NumIn(), t.NumOut()
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switch ft {
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case ttbFunc: // func(T, T) bool
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if ni == 2 && no == 1 && t.In(0) == t.In(1) && t.Out(0) == boolType {
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return true
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}
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case tibFunc: // func(T, I) bool
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if ni == 2 && no == 1 && t.In(0).AssignableTo(t.In(1)) && t.Out(0) == boolType {
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return true
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}
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case trFunc: // func(T) R
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if ni == 1 && no == 1 {
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return true
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}
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}
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return false
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}
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