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exp/regexp/syntax: add Prog.NumCap

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R=rsc, r
CC=golang-dev
https://golang.org/cl/4662083
This commit is contained in:
Sam Thorogood 2011-07-13 10:15:00 -07:00 committed by Russ Cox
parent 4c986d86b1
commit e3a773479d
2 changed files with 7 additions and 2 deletions
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4
src/pkg/exp/regexp/syntax/compile.go
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@ -185,6 +185,10 @@ func (c *compiler) cap(arg uint32) frag {
f := c.inst(InstCapture) f := c.inst(InstCapture)
f.out = patchList(f.i << 1) f.out = patchList(f.i << 1)
c.p.Inst[f.i].Arg = arg c.p.Inst[f.i].Arg = arg
if c.p.NumCap < int(arg)+1 {
c.p.NumCap = int(arg) + 1
}
return f return f
} }

5
src/pkg/exp/regexp/syntax/prog.go
View File

@ -10,8 +10,9 @@ import (
// A Prog is a compiled regular expression program. // A Prog is a compiled regular expression program.
type Prog struct { type Prog struct {
Inst []Inst Inst []Inst
Start int // index of start instruction Start int // index of start instruction
NumCap int // number of InstCapture insts in re
} }
// An InstOp is an instruction opcode. // An InstOp is an instruction opcode.