// license that can be found in the LICENSE file.

package runtime

// This file contains the implementation of Go select statements.

import (
	"internal/abi"
	"unsafe"
)

const debugSelect = false

// Select case descriptor.
// Known to compiler.
// Changes here must also be made in src/cmd/compile/internal/walk/select.go's scasetype.
type scase struct {
	c    *hchan         // chan
	elem unsafe.Pointer // data element
}

//  At least one of c.sendq and c.recvq is empty,
//  except for the case of an unbuffered channel with a single goroutine
//  blocked on it for both sending and receiving using a select statement,
//  in which case the length of c.sendq and c.recvq is limited only by the
//  size of the select statement.
//
// For buffered channels, also:
//  c.qcount > 0 implies that c.recvq is empty.
//  c.qcount < c.dataqsiz implies that c.sendq is empty.

import (

	// are only accessed when holding a semaRoot lock.

	acquiretime int64
	releasetime int64
	ticket      uint32

	// isSelect indicates g is participating in a select, so
	// g.selectDone must be CAS'd to win the wake-up race.
	isSelect bool

	// success indicates whether communication over channel c
	// succeeded. It is true if the goroutine was awoken because a

var counterErrorsInvalidToolchainInFile = telemetry.NewCounter("go/errors:invalid-toolchain-in-file")

// Select invokes a different Go toolchain if directed by
// the GOTOOLCHAIN environment variable or the user's configuration
// or go.mod file.
// It must be called early in startup.
// See https://go.dev/doc/toolchain#select.
func Select() {
	log.SetPrefix("go: ")
	defer log.SetPrefix("")

	if !modload.WillBeEnabled() {
		return
	}

		return nil
	}

	panic(fmt.Errorf("unknown output format '%v'", s3Select.Output.format))
}

// Evaluate - filters and sends records read from opened reader as per select statement to http response writer.
func (s3Select *S3Select) Evaluate(w http.ResponseWriter) {
	getProgressFunc := s3Select.getProgress
	if !s3Select.Progress.Enabled {
		getProgressFunc = nil
	}

	}

	r = dryDB.Table("gorm.user").Select("name").Find(&User{}).Statement
	if !regexp.MustCompile("SELECT .name. FROM .gorm.\\..user. WHERE .user.\\..deleted_at. IS NULL").MatchString(r.Statement.SQL.String()) {
		t.Errorf("Table with escape character, got %v", r.Statement.SQL.String())
	}

	r = dryDB.Select("name").Find(&UserWithTable{}).Statement

	print(1)
	select {
	case <-c:
		print(2)
		panic("abc")
	case c <- 1:
		print(2)
		goto L
	}
}

func _() int {
	print(1)
	select {
	case <-c:
		print(2)
		panic("abc")
	default:
		select{}
	}
}

// if any cases don't terminate, the select isn't okay anymore

func _() int {
	print(1)
	select {
	case <-c:
		print(2)
	}
} // ERROR "missing return"

        // Select default project name
        ConcurrentTestUtil.poll(60) {
            assert handle.standardOutput.contains(projectNamePrompt)
        }
        handle.stdinPipe.write(TextUtil.platformLineSeparator.bytes)

        // Select 'Single project'
        ConcurrentTestUtil.poll(60) {
            assert handle.standardOutput.contains("Select application structure:")

        expect:
        toolChain.select(platform).available
    }

    def "setTargets removes existing platforms"() {
        given:
        platform.name >> "SomePlatform"
        toolChain.target("SomePlatform", Mock(Action))
        toolChain.setTargets("NoPlatform")

        expect:
        !toolChain.select(platform).available
    }

//
// Use Select when you only want a subset of the fields. By default, GORM will select all fields.
// Select accepts both string arguments and arrays.
//
//	// Select name and age of user using multiple arguments
//	db.Select("name", "age").Find(&users)
//	// Select name and age of user using an array
//	db.Select([]string{"name", "age"}).Find(&users)