57f49af726
This fixes the new loop variable behavior in Go 1.22.
Specifically:
* The compiler (actually, the x/tools/go/ssa package) now correctly
picks up the Go version.
* If a module doesn't specify the Go version, the current Go version
(from the `go` tool and standard library) is used. This fixes
`go run`.
* The tests in testdata/ that use a separate directory are now
actually run in that directory. This makes it possible to use a
go.mod file there.
* There is a test to make sure old Go modules still work with the old
Go behavior, even on a newer Go version.
31 строка
507 Б
Go
31 строка
507 Б
Go
package main
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func main() {
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testIntegerRange()
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testLoopVar()
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}
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func testIntegerRange() {
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for i := range 10 {
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println(10 - i)
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}
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println("go1.22 has lift-off!")
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}
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func testLoopVar() {
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var f func() int
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for i := 0; i < 1; i++ {
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if i == 0 {
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f = func() int { return i }
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}
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}
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// Variable n is 1 in Go 1.21, or 0 in Go 1.22.
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n := f()
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if n == 0 {
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println("loops behave like Go 1.22")
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} else if n == 1 {
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println("loops behave like Go 1.21")
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} else {
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println("unknown loop behavior")
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}
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}
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