Added tests for Task.WhenAll w/ empty list
[mono.git] / mcs / class / System.ServiceModel / Mono.CodeGeneration / CodeWhile.cs
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11 // included in all copies or substantial portions of the Software.
12 // 
13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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21 // Copyright (C) Lluis Sanchez Gual, 2004
22 //
23
24 #if !MONOTOUCH
25 using System;
26 using System.Reflection;
27 using System.Reflection.Emit;
28
29 namespace Mono.CodeGeneration
30 {
31         public class CodeWhile: CodeStatement
32         {
33                 CodeExpression condition;
34                 CodeBlock whileBlock;
35                 
36                 public CodeWhile (CodeExpression condition)
37                 {
38                         this.condition = condition;
39                         if (condition.GetResultType () != typeof(bool))
40                                 throw new InvalidOperationException ("Condition expression is not boolean"); 
41                 }
42                 
43                 public override void Generate (ILGenerator gen)
44                 {
45                         Label startLabel = gen.DefineLabel ();
46                         Label checkLabel = gen.DefineLabel ();
47                         
48                         gen.Emit (OpCodes.Br, checkLabel);
49                         gen.MarkLabel(startLabel);
50                         whileBlock.Generate (gen);
51                         gen.MarkLabel(checkLabel);
52                         
53                         if (condition is CodeConditionExpression)
54                                 ((CodeConditionExpression)condition).GenerateForBranch (gen, startLabel, true);
55                         else {
56                                 condition.Generate (gen);
57                                 gen.Emit (OpCodes.Brtrue, startLabel);
58                         }
59                 }
60                 
61                 public override void PrintCode (CodeWriter cp)
62                 {
63                         cp.Write ("while (");
64                         condition.PrintCode (cp);
65                         cp.Write (") {");
66                         cp.EndLine ();
67                         cp.Indent ();
68                         whileBlock.PrintCode (cp);
69                         cp.Unindent ();
70                         cp.BeginLine ().Write ("}");
71                 }
72                 
73                 public CodeBlock WhileBlock
74                 {
75                         get { return whileBlock; }
76                         set { whileBlock = value; }
77                 }
78         }
79 }
80 #endif