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1 module dmd.WhileStatement;
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2
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114
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3 import dmd.common;
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4 import dmd.Statement;
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5 import dmd.Expression;
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6 import dmd.Scope;
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7 import dmd.InterState;
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8 import dmd.HdrGenState;
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9 import dmd.OutBuffer;
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10 import dmd.InlineScanState;
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11 import dmd.IRState;
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12 import dmd.Loc;
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13 import dmd.BE;
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14 import dmd.ForStatement;
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15
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16 class WhileStatement : Statement
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17 {
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18 Expression condition;
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19 Statement body_;
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20
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21 this(Loc loc, Expression c, Statement b)
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22 {
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23 register();
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24 super(loc);
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25 condition = c;
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26 body_ = b;
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27 }
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28
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29 override Statement syntaxCopy()
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30 {
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31 WhileStatement s = new WhileStatement(loc, condition.syntaxCopy(), body_ ? body_.syntaxCopy() : null);
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32 return s;
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33 }
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34
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35 override Statement semantic(Scope sc)
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36 {
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37 /* Rewrite as a for(;condition;) loop
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38 */
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39
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40 Statement s = new ForStatement(loc, null, condition, null, body_);
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41 s = s.semantic(sc);
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42 return s;
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43 }
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44
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72
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45 override bool hasBreak()
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46 {
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47 return true;
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48 }
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49
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50 override bool hasContinue()
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51 {
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52 return true;
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53 }
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54
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55 override bool usesEH()
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56 {
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57 assert(false);
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58 }
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59
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60 override BE blockExit()
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61 {
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62 assert(false);
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63 }
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64
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65 override bool comeFrom()
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66 {
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67 assert(false);
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68 }
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69
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70 override Expression interpret(InterState istate)
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71 {
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72 version(LOG) {
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73 printf("WhileStatement::interpret()\n");
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74 }
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75 assert(false); // rewritten to ForStatement
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76 return null;
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77 }
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78
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79 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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80 {
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81 assert(false);
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82 }
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83
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84 override Statement inlineScan(InlineScanState* iss)
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85 {
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86 assert(false);
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87 }
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88
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89 override void toIR(IRState* irs)
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90 {
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91 assert(false);
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92 }
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72
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93 }
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