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delete unused This() in preparation for removing linking via array indexes

R=rsc
DELTA=26  (2 added, 23 deleted, 1 changed)
OCL=16895
CL=16909
This commit is contained in:
Rob Pike 2008-10-10 12:41:43 -07:00
parent 7271e048fc
commit 41c462c0a1
1 changed files with 3 additions and 24 deletions
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27
usr/r/regexp/regexp.go
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@ -21,9 +21,7 @@ export var ErrBadBackslash = os.NewError("illegal backslash escape");
// An instruction executed by the NFA
type Inst interface {
Type() int; // the type of this instruction: CHAR, ANY, etc.
This() int; // the index of this instruction
Next() int; // the index of the instruction to execute after this one
SetThis(i int);
SetNext(i int);
Print(ind string);
}
@ -58,9 +56,7 @@ type Start struct {
}
func (start *Start) Type() int { return START }
func (start *Start) This() int { return start.this }
func (start *Start) Next() int { return start.next }
func (start *Start) SetThis(i int) { start.this = i }
func (start *Start) SetNext(i int) { start.next = i }
func (start *Start) Print(ind string) { print(ind, "start") }
@ -71,9 +67,7 @@ type End struct {
}
func (end *End) Type() int { return END }
func (end *End) This() int { return end.this }
func (end *End) Next() int { return end.next }
func (end *End) SetThis(i int) { end.this = i }
func (end *End) SetNext(i int) { end.next = i }
func (end *End) Print(ind string) { print(ind, "end") }
@ -84,9 +78,7 @@ type Bot struct {
}
func (bot *Bot) Type() int { return BOT }
func (bot *Bot) This() int { return bot.this }
func (bot *Bot) Next() int { return bot.next }
func (bot *Bot) SetThis(i int) { bot.this = i }
func (bot *Bot) SetNext(i int) { bot.next = i }
func (bot *Bot) Print(ind string) { print(ind, "bot") }
@ -97,9 +89,7 @@ type Eot struct {
}
func (eot *Eot) Type() int { return EOT }
func (eot *Eot) This() int { return eot.this }
func (eot *Eot) Next() int { return eot.next }
func (eot *Eot) SetThis(i int) { eot.this = i }
func (eot *Eot) SetNext(i int) { eot.next = i }
func (eot *Eot) Print(ind string) { print(ind, "eot") }
@ -112,9 +102,7 @@ type Char struct {
}
func (char *Char) Type() int { return CHAR }
func (char *Char) This() int { return char.this }
func (char *Char) Next() int { return char.next }
func (char *Char) SetThis(i int) { char.this = i }
func (char *Char) SetNext(i int) { char.next = i }
func (char *Char) Print(ind string) { print(ind, "char ", string(char.char)) }
@ -131,9 +119,7 @@ type Any struct {
}
func (any *Any) Type() int { return ANY }
func (any *Any) This() int { return any.this }
func (any *Any) Next() int { return any.next }
func (any *Any) SetThis(i int) { any.this = i }
func (any *Any) SetNext(i int) { any.next = i }
func (any *Any) Print(ind string) { print(ind, "any") }
@ -144,9 +130,7 @@ type Bra struct {
}
func (bra *Bra) Type() int { return BRA }
func (bra *Bra) This() int { return bra.this }
func (bra *Bra) Next() int { return bra.next }
func (bra *Bra) SetThis(i int) { bra.this = i }
func (bra *Bra) SetNext(i int) { bra.next = i }
func (bra *Bra) Print(ind string) { print(ind , "bra"); }
@ -158,9 +142,7 @@ type Ebra struct {
}
func (ebra *Ebra) Type() int { return BRA }
func (ebra *Ebra) This() int { return ebra.this }
func (ebra *Ebra) Next() int { return ebra.next }
func (ebra *Ebra) SetThis(i int) { ebra.this = i }
func (ebra *Ebra) SetNext(i int) { ebra.next = i }
func (ebra *Ebra) Print(ind string) { print(ind , "ebra ", ebra.n); }
@ -172,9 +154,7 @@ type Alt struct {
}
func (alt *Alt) Type() int { return ALT }
func (alt *Alt) This() int { return alt.this }
func (alt *Alt) Next() int { return alt.next }
func (alt *Alt) SetThis(i int) { alt.this = i }
func (alt *Alt) SetNext(i int) { alt.next = i }
func (alt *Alt) Print(ind string) { print(ind , "alt(", alt.left, ")"); }
@ -185,9 +165,7 @@ type Nop struct {
}
func (nop *Nop) Type() int { return NOP }
func (nop *Nop) This() int { return nop.this }
func (nop *Nop) Next() int { return nop.next }
func (nop *Nop) SetThis(i int) { nop.this = i }
func (nop *Nop) SetNext(i int) { nop.next = i }
func (nop *Nop) Print(ind string) { print(ind, "nop") }
@ -198,7 +176,6 @@ func (re *RE) AddInst(inst Inst) int {
}
re.inst[re.ninst] = inst;
i := re.ninst;
inst.SetThis(re.ninst);
re.ninst++;
inst.SetNext(re.ninst);
return i;
@ -275,10 +252,12 @@ func special(c int) bool {
func (p *Parser) Term() (start, end int) {
switch c := p.c(); c {
case ')', '|', EOF:
case '|', EOF:
return NULL, NULL;
case '*', '+', '|':
p.re.Error(ErrBareClosure);
case ')':
p.re.Error(ErrUnmatchedRpar);
case '.':
p.nextc();
start = p.re.AddInst(new(Any));