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      1 // run
      2 
      3 // Copyright 2009 The Go Authors. All rights reserved.
      4 // Use of this source code is governed by a BSD-style
      5 // license that can be found in the LICENSE file.
      6 
      7 // Test if statements in various forms.
      8 
      9 package main
     10 
     11 func assertequal(is, shouldbe int, msg string) {
     12 	if is != shouldbe {
     13 		print("assertion fail", msg, "\n")
     14 		panic(1)
     15 	}
     16 }
     17 
     18 func main() {
     19 	i5 := 5
     20 	i7 := 7
     21 
     22 	var count int
     23 
     24 	count = 0
     25 	if true {
     26 		count = count + 1
     27 	}
     28 	assertequal(count, 1, "if true")
     29 
     30 	count = 0
     31 	if false {
     32 		count = count + 1
     33 	}
     34 	assertequal(count, 0, "if false")
     35 
     36 	count = 0
     37 	if one := 1; true {
     38 		count = count + one
     39 	}
     40 	assertequal(count, 1, "if true one")
     41 
     42 	count = 0
     43 	if one := 1; false {
     44 		count = count + 1
     45 		_ = one
     46 	}
     47 	assertequal(count, 0, "if false one")
     48 
     49 	count = 0
     50 	if i5 < i7 {
     51 		count = count + 1
     52 	}
     53 	assertequal(count, 1, "if cond")
     54 
     55 	count = 0
     56 	if true {
     57 		count = count + 1
     58 	} else {
     59 		count = count - 1
     60 	}
     61 	assertequal(count, 1, "if else true")
     62 
     63 	count = 0
     64 	if false {
     65 		count = count + 1
     66 	} else {
     67 		count = count - 1
     68 	}
     69 	assertequal(count, -1, "if else false")
     70 
     71 	count = 0
     72 	if t := 1; false {
     73 		count = count + 1
     74 		_ = t
     75 		t := 7
     76 		_ = t
     77 	} else {
     78 		count = count - t
     79 	}
     80 	assertequal(count, -1, "if else false var")
     81 
     82 	count = 0
     83 	t := 1
     84 	if false {
     85 		count = count + 1
     86 		t := 7
     87 		_ = t
     88 	} else {
     89 		count = count - t
     90 	}
     91 	_ = t
     92 	assertequal(count, -1, "if else false var outside")
     93 }
     94