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Add a moveprune operation which prunes an empty node if needed after … #1263

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merged 6 commits into from
Apr 2, 2022
Merged

Add a moveprune operation which prunes an empty node if needed after … #1263

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5aa01d2
Add a moveprune operation which prunes an empty node if needed after …
AngledLuffa Mar 30, 2022
47b2655
Add a test of something which should be meaningless - a numbered sister
AngledLuffa Mar 31, 2022
98ac0c6
Add an AncestorOfLeaf relation
AngledLuffa Apr 1, 2022
b4349fc
Add an ith leaf relation to tregex
AngledLuffa Apr 1, 2022
24d0c03
Add a _ROOT_ description which matches exactly the root of a tree
AngledLuffa Apr 1, 2022
c609fa2
Apparently tregex relation satisfies() is just not used anywhere
AngledLuffa Apr 1, 2022
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10 changes: 9 additions & 1 deletion src/edu/stanford/nlp/trees/tregex/DescriptionPattern.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ public class DescriptionPattern extends TregexPattern {
private static Redwood.RedwoodChannels log = Redwood.channels(DescriptionPattern.class);

enum DescriptionMode {
PATTERN, STRINGS, EXACT, ANYTHING
PATTERN, STRINGS, EXACT, ANYTHING, ROOT
}

private final Relation rel;
Expand Down Expand Up @@ -77,6 +77,11 @@ public DescriptionPattern(Relation rel, boolean negDesc, String desc,
descPattern = null;
exactMatch = null;
stringFilter = null;
} else if (desc.equals("_ROOT_")) {
descriptionMode = DescriptionMode.ROOT;
descPattern = null;
exactMatch = null;
stringFilter = null;
} else if (SINGLE_WORD_PATTERN.matcher(desc).matches()) {
// Expressions are written like this to put special characters
// in the tregex matcher, but a regular expression is less
Expand Down Expand Up @@ -403,6 +408,9 @@ private void goToNextTreeNodeMatch() {
case STRINGS:
found = myNode.stringFilter.test(value);
break;
case ROOT:
found = (nextTreeNodeMatchCandidate == root);
break;
default:
throw new IllegalArgumentException("Unexpected match mode");
}
Expand Down