The new go/build/constraint package parses build constraint lines, both the original // +build syntax and the //go:build syntax that will be introduced in Go 1.17. This package exists so that tools built with Go 1.16 will be able to process Go 1.17 source code. See https://golang.org/design/draft-gobuild for details about the build constraint syntaxes and the planned transition to the //go:build syntax. Note that //go:build lines are not supported in Go 1.16 and should not be introduced into Go programs yet.
解读“Bug-resistant build constraints — Draft Design”
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希望对“Bug-resistant build constraints — Draft Design”感兴趣的小伙伴，提早了解设计方案，并集合当前的
// +build来分析参考资料
https://golang.org/doc/go1.16#go/build/constraint
https://go.googlesource.com/proposal/+/master/design/draft-gobuild.md
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