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1 "{ Package: 'stx:goodies/petitparser/compiler' }" |
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2 |
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3 "{ NameSpace: Smalltalk }" |
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4 |
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5 PPCRewritingVisitor subclass:#PPCTokenVisitor |
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6 instanceVariableNames:'forbiddenNodes' |
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7 classVariableNames:'' |
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8 poolDictionaries:'' |
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9 category:'PetitCompiler-Visitors' |
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10 ! |
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11 |
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12 !PPCTokenVisitor methodsFor:'accessing'! |
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13 |
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14 forbiddenNodes: nodeSet |
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15 forbiddenNodes := nodeSet. |
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16 ! ! |
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17 |
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18 !PPCTokenVisitor methodsFor:'initialization'! |
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19 |
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20 initialize |
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21 super initialize. |
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22 forbiddenNodes := IdentitySet new. |
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23 ! ! |
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24 |
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25 !PPCTokenVisitor methodsFor:'traversing'! |
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26 |
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27 beforeAccept: node |
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28 self assert: (forbiddenNodes includes: node) not description: 'Does not look like a token' |
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29 ! ! |
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30 |
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31 !PPCTokenVisitor methodsFor:'visiting'! |
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32 |
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33 visitActionNode: node |
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34 self visitChildren: node. |
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35 |
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36 (node hasProperty: #trimmingToken) ifTrue: [ |
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37 | child | |
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38 "token in token..." |
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39 child := node child children second. |
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40 child name ifNil: [ |
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41 self change. |
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42 child name: node name. |
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43 ^ child |
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44 ] |
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45 ]. |
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46 |
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47 self change. |
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48 ^ node child |
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49 ! |
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50 |
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51 visitSequenceNode: node |
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52 self visitChildren: node. |
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53 |
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54 self change. |
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55 ^ PPCTokenSequenceNode new |
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56 children: node children; |
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57 name: node name; |
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58 properties: node properties; |
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59 yourself |
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60 ! |
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61 |
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62 visitStarMessagePredicateNode: node |
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63 self visitChildren: node. |
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64 |
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65 self change. |
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66 ^ PPCTokenStarMessagePredicateNode new |
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67 name: node name; |
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68 message: node message; |
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69 child: node child; |
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70 yourself |
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71 ! |
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72 |
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73 visitSymbolActionNode: node |
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74 self visitChildren: node. |
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75 |
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76 self change. |
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77 ^ node child |
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78 ! |
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79 |
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80 visitTokenNode: node |
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81 self visitChildren: node. |
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82 self change. |
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83 ^ node child |
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84 ! |
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85 |
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86 visitTrimmingTokenNode: node |
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87 self visitChildren: node. |
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88 |
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89 self change. |
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90 ^ node child |
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91 |
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92 "Modified: / 23-04-2015 / 12:11:06 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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93 ! ! |
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94 |