diff options
Diffstat (limited to 'gnu/regexp/REMatch.java')
| -rw-r--r-- | gnu/regexp/REMatch.java | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gnu/regexp/REMatch.java b/gnu/regexp/REMatch.java index 01a6455b6..140a9c43e 100644 --- a/gnu/regexp/REMatch.java +++ b/gnu/regexp/REMatch.java @@ -65,7 +65,12 @@ public final class REMatch implements Serializable, Cloneable { // Package scope; used by RE. int index; // used while matching to mark current match position in input + // start1[i] is set when the i-th subexp starts. And start1[i] is copied + // to start[i] when the i-th subexp ends. So start[i] keeps the previously + // assigned value while the i-th subexp is being processed. This makes + // backreference to the i-th subexp within the i-th subexp possible. int[] start; // start positions (relative to offset) for each (sub)exp. + int[] start1; // start positions (relative to offset) for each (sub)exp. int[] end; // end positions for the same // start[i] == -1 or end[i] == -1 means that the start/end position is void. // start[i] == p or end[i] == p where p < 0 and p != -1 means that @@ -81,6 +86,7 @@ public final class REMatch implements Serializable, Cloneable { REMatch copy = (REMatch) super.clone(); copy.start = (int[]) start.clone(); + copy.start1 = (int[]) start1.clone(); copy.end = (int[]) end.clone(); return copy; @@ -91,6 +97,7 @@ public final class REMatch implements Serializable, Cloneable { void assignFrom(REMatch other) { start = other.start; + start1 = other.start1; end = other.end; index = other.index; backtrackStack = other.backtrackStack; @@ -98,6 +105,7 @@ public final class REMatch implements Serializable, Cloneable { REMatch(int subs, int anchor, int eflags) { start = new int[subs+1]; + start1 = new int[subs+1]; end = new int[subs+1]; this.anchor = anchor; this.eflags = eflags; @@ -128,7 +136,7 @@ public final class REMatch implements Serializable, Cloneable { offset = index; this.index = 0; for (int i = 0; i < start.length; i++) { - start[i] = end[i] = -1; + start[i] = start1[i] = end[i] = -1; } backtrackStack = null; } |