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< > BotCompany Repo | #1029560 // CCI_Choice - CharacterClassIterator branching out depending on next char

JavaX fragment (include) [tags: use-pretranspiled]

Libraryless. Click here for Pure Java version (2692L/17K).

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sclass CCI_Choice extends CharacterClassIterator {
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  bool canEndHere;
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  // can be a HashMap or TreeMap (e.g. with special comparator)
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  Map<Char, CharacterClassIterator> map;
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  // computed on demand
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  CharRange acceptedCharRange;
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  *() {}
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  *(bool canEndHere, Map<Char, CharacterClassIterator> *map) {}
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  CharacterClassIterator acceptChar(char c) {
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    ret assertNotNull(map.get(c));
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  }
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  bool canEndHere() {
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    ret canEndHere;
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  }
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  bool canAcceptChar(char c) {
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    ret map.containsKey(c);
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  }
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  Cl<Char> acceptedChars() { ret keys(map); }
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  CharRange acceptedCharRange() {
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    if (empty(map)) null;
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    if (acceptedCharRange == null)
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      acceptedCharRange = calcAcceptedCharRange();
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    ret acceptedCharRange;
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  }
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  CharRange calcAcceptedCharRange() {
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    if (map instanceof TreeMap) {
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      ret CharRange(firstKey(map), lastKey((TreeMap<Char, CharacterClassIterator>) map));
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    } else {
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      char min = 0xFFFF, max = 0;
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      for (char c : keys(map)) {
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        if (c < min) min = c;
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        if (c > max) max = c;
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      }
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      ret CharRange(min, max); 
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    }
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  }
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  // object is immutable, so no cloning necessary
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  CharacterClassIterator cloneCCI() {
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    this;
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  }
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}  

Author comment

Began life as a copy of #1029558

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Snippet ID: #1029560
Snippet name: CCI_Choice - CharacterClassIterator branching out depending on next char
Eternal ID of this version: #1029560/8
Text MD5: 615db8a1e3ff8d1ec0360a260b70bc26
Transpilation MD5: 9ebd3cb80bd73d149f11fba9599eb1ea
Author: stefan
Category: javax
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2020-08-23 12:55:14
Source code size: 1251 bytes / 51 lines
Pitched / IR pitched: No / No
Views / Downloads: 164 / 417
Version history: 7 change(s)
Referenced in: [show references]