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Fix a few bug in the pattern compilation code.

This commit is contained in:
Danila Fedorin 2017-07-24 20:47:13 -07:00
parent ac3087fc3f
commit 43c3d5f754
1 changed files with 12 additions and 3 deletions
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15
src/org/nwapw/abacus/lexing/pattern/Pattern.java
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@ -68,6 +68,7 @@ public class Pattern<T> {
private PatternChain<T> parseOr(){
Stack<PatternChain<T>> orStack = new Stack<>();
index++;
while(index < source.length() && source.charAt(index) != ']'){
if(source.charAt(index) == '-'){
index++;
@ -82,10 +83,9 @@ public class Pattern<T> {
if(newChain == null) return null;
orStack.push(newChain);
}
index++;
}
if(index >= source.length()) return null;
return combineChains(orStack);
if(index++ >= source.length()) return null;
return (orStack.size() == 1) ? orStack.pop() : combineChains(orStack);
}
private PatternChain<T> parseSegment(boolean isSubsegment){
@ -124,6 +124,12 @@ public class Pattern<T> {
}
currentChain = parseOr();
if(currentChain == null) return null;
} else if(currentChar == '.'){
if(currentChain != null){
fullChain.append(currentChain);
}
currentChain = new PatternChain<>(new AnyNode<>());
index++;
} else {
if(currentChain != null){
fullChain.append(currentChain);
@ -159,4 +165,7 @@ public class Pattern<T> {
}
}
public PatternNode<T> getHead() {
return head;
}
}