github.com/yanyiwu/go@v0.0.0-20150106053140-03d6637dbb7f/src/go/parser/testdata/issue3106.src (about)

     1  // Copyright 2012 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Test case for issue 3106: Better synchronization of
     6  // parser after certain syntax errors.
     7  
     8  package main
     9  
    10  func f() {
    11  	var m Mutex
    12  	c := MakeCond(&m)
    13  	percent := 0
    14  	const step = 10
    15  	for i := 0; i < 5; i++ {
    16  		go func() {
    17  			for {
    18  				// Emulates some useful work.
    19  				time.Sleep(1e8)
    20  				m.Lock()
    21  				defer
    22  				if /* ERROR "expected operand, found 'if'" */ percent == 100 {
    23  					m.Unlock()
    24  					break
    25  				}
    26  				percent++
    27  				if percent % step == 0 {
    28  					//c.Signal()
    29  				}
    30  				m.Unlock()
    31  			}
    32  		}()
    33  	}
    34  	for {
    35  		m.Lock()
    36  		if percent == 0 || percent % step != 0 {
    37  			c.Wait()
    38  		}
    39  		fmt.Print(",")
    40  		if percent == 100 {
    41  			m.Unlock()
    42  			break
    43  		}
    44  		m.Unlock()
    45  	}
    46  }