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1 "{ Package: 'stx:goodies/petitparser/compiler/tests/extras' }" |
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2 |
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3 "{ NameSpace: Smalltalk }" |
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4 |
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5 PPCompositeParser subclass:#PPLL1ExpressionGrammar |
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6 instanceVariableNames:'add prod term mul prim parens number mulPrime addPrime termPrime' |
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7 classVariableNames:'' |
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8 poolDictionaries:'' |
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9 category:'PetitCompiler-Extras-Tests-Expressions' |
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10 ! |
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11 |
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12 |
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13 !PPLL1ExpressionGrammar methodsFor:'as yet unclassified'! |
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14 |
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15 add |
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16 ^ prod, addPrime optional |
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17 map: [ :_prod :_addPrime | |
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18 _addPrime isNil |
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19 ifTrue: [ _prod ] |
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20 ifFalse: [ Array with: _prod withAll: _addPrime ] |
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21 |
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22 ] |
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23 ! |
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24 |
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25 addPrime |
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26 ^ $+ asParser trimmingToken , term |
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27 ! |
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28 |
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29 mul |
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30 ^ prim, mulPrime optional |
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31 map: [ :_prim :_mulPrime | |
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32 _mulPrime isNil |
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33 ifTrue: [ _prim ] |
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34 ifFalse: [ Array with: _prim withAll: _mulPrime ] |
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35 |
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36 ] |
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37 ! |
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38 |
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39 mulPrime |
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40 ^ $* asParser trimmingToken, prod |
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41 ! |
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42 |
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43 number |
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44 ^ #digit asParser plus trimmingToken ==> [ :token | token inputValue asNumber ] |
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45 ! |
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46 |
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47 parens |
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48 ^ ($( asParser token trim), term , ($) asParser token trim) |
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49 ! |
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50 |
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51 prim |
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52 ^ parens / number |
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53 ! |
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54 |
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55 prod |
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56 ^ mul |
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57 ! |
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58 |
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59 start |
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60 ^ term end |
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61 ! |
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62 |
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63 term |
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64 ^ prod, termPrime optional |
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65 map: [ :_prod :_termPrime | |
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66 _termPrime isNil |
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67 ifTrue: [ _prod ] |
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68 ifFalse: [ Array with: _prod withAll: _termPrime ] |
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69 ] |
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70 ! |
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71 |
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72 termPrime |
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73 ^ $+ asParser trimmingToken, term |
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74 ! ! |
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75 |
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76 !PPLL1ExpressionGrammar class methodsFor:'documentation'! |
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77 |
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78 version_HG |
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79 |
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80 ^ '$Changeset: <not expanded> $' |
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81 ! ! |
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82 |