Update to last common bleve (#3986)

vendor/github.com/couchbase/vellum/regexp/inst.go

@@ -0,0 +1,62 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package regexp
+
+import "fmt"
+
+// instOp represents a instruction operation
+type instOp int
+
+// the enumeration of operations
+const (
+	OpMatch instOp = iota
+	OpJmp
+	OpSplit
+	OpRange
+)
+
+// instSize is the approxmiate size of the an inst struct in bytes
+const instSize = 40
+
+type inst struct {
+	op         instOp
+	to         uint
+	splitA     uint
+	splitB     uint
+	rangeStart byte
+	rangeEnd   byte
+}
+
+func (i *inst) String() string {
+	switch i.op {
+	case OpJmp:
+		return fmt.Sprintf("JMP: %d", i.to)
+	case OpSplit:
+		return fmt.Sprintf("SPLIT: %d - %d", i.splitA, i.splitB)
+	case OpRange:
+		return fmt.Sprintf("RANGE: %x - %x", i.rangeStart, i.rangeEnd)
+	}
+	return "MATCH"
+}
+
+type prog []*inst
+
+func (p prog) String() string {
+	rv := "\n"
+	for i, pi := range p {
+		rv += fmt.Sprintf("%d %v\n", i, pi)
+	}
+	return rv
+}