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ceph-csi/vendor/github.com/antlr4-go/antlr/v4/transition.go
Madhu Rajanna 5a66991bb3 rebase: update kubernetes to latest
updating the kubernetes release to the
latest in main go.mod

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
2024-08-20 08:17:01 +00:00

440 lines
9.8 KiB
Go

// Copyright (c) 2012-2022 The ANTLR Project. All rights reserved.
// Use of this file is governed by the BSD 3-clause license that
// can be found in the LICENSE.txt file in the project root.
package antlr
import (
"fmt"
"strconv"
"strings"
)
// atom, set, epsilon, action, predicate, rule transitions.
//
// <p>This is a one way link. It emanates from a state (usually via a list of
// transitions) and has a target state.</p>
//
// <p>Since we never have to change the ATN transitions once we construct it,
// the states. We'll use the term Edge for the DFA to distinguish them from
// ATN transitions.</p>
type Transition interface {
getTarget() ATNState
setTarget(ATNState)
getIsEpsilon() bool
getLabel() *IntervalSet
getSerializationType() int
Matches(int, int, int) bool
}
type BaseTransition struct {
target ATNState
isEpsilon bool
label int
intervalSet *IntervalSet
serializationType int
}
func NewBaseTransition(target ATNState) *BaseTransition {
if target == nil {
panic("target cannot be nil.")
}
t := new(BaseTransition)
t.target = target
// Are we epsilon, action, sempred?
t.isEpsilon = false
t.intervalSet = nil
return t
}
func (t *BaseTransition) getTarget() ATNState {
return t.target
}
func (t *BaseTransition) setTarget(s ATNState) {
t.target = s
}
func (t *BaseTransition) getIsEpsilon() bool {
return t.isEpsilon
}
func (t *BaseTransition) getLabel() *IntervalSet {
return t.intervalSet
}
func (t *BaseTransition) getSerializationType() int {
return t.serializationType
}
func (t *BaseTransition) Matches(_, _, _ int) bool {
panic("Not implemented")
}
const (
TransitionEPSILON = 1
TransitionRANGE = 2
TransitionRULE = 3
TransitionPREDICATE = 4 // e.g., {isType(input.LT(1))}?
TransitionATOM = 5
TransitionACTION = 6
TransitionSET = 7 // ~(A|B) or ~atom, wildcard, which convert to next 2
TransitionNOTSET = 8
TransitionWILDCARD = 9
TransitionPRECEDENCE = 10
)
//goland:noinspection GoUnusedGlobalVariable
var TransitionserializationNames = []string{
"INVALID",
"EPSILON",
"RANGE",
"RULE",
"PREDICATE",
"ATOM",
"ACTION",
"SET",
"NOT_SET",
"WILDCARD",
"PRECEDENCE",
}
//var TransitionserializationTypes struct {
// EpsilonTransition int
// RangeTransition int
// RuleTransition int
// PredicateTransition int
// AtomTransition int
// ActionTransition int
// SetTransition int
// NotSetTransition int
// WildcardTransition int
// PrecedencePredicateTransition int
//}{
// TransitionEPSILON,
// TransitionRANGE,
// TransitionRULE,
// TransitionPREDICATE,
// TransitionATOM,
// TransitionACTION,
// TransitionSET,
// TransitionNOTSET,
// TransitionWILDCARD,
// TransitionPRECEDENCE
//}
// AtomTransition
// TODO: make all transitions sets? no, should remove set edges
type AtomTransition struct {
BaseTransition
}
func NewAtomTransition(target ATNState, intervalSet int) *AtomTransition {
t := &AtomTransition{
BaseTransition: BaseTransition{
target: target,
serializationType: TransitionATOM,
label: intervalSet,
isEpsilon: false,
},
}
t.intervalSet = t.makeLabel()
return t
}
func (t *AtomTransition) makeLabel() *IntervalSet {
s := NewIntervalSet()
s.addOne(t.label)
return s
}
func (t *AtomTransition) Matches(symbol, _, _ int) bool {
return t.label == symbol
}
func (t *AtomTransition) String() string {
return strconv.Itoa(t.label)
}
type RuleTransition struct {
BaseTransition
followState ATNState
ruleIndex, precedence int
}
func NewRuleTransition(ruleStart ATNState, ruleIndex, precedence int, followState ATNState) *RuleTransition {
return &RuleTransition{
BaseTransition: BaseTransition{
target: ruleStart,
isEpsilon: true,
serializationType: TransitionRULE,
},
ruleIndex: ruleIndex,
precedence: precedence,
followState: followState,
}
}
func (t *RuleTransition) Matches(_, _, _ int) bool {
return false
}
type EpsilonTransition struct {
BaseTransition
outermostPrecedenceReturn int
}
func NewEpsilonTransition(target ATNState, outermostPrecedenceReturn int) *EpsilonTransition {
return &EpsilonTransition{
BaseTransition: BaseTransition{
target: target,
serializationType: TransitionEPSILON,
isEpsilon: true,
},
outermostPrecedenceReturn: outermostPrecedenceReturn,
}
}
func (t *EpsilonTransition) Matches(_, _, _ int) bool {
return false
}
func (t *EpsilonTransition) String() string {
return "epsilon"
}
type RangeTransition struct {
BaseTransition
start, stop int
}
func NewRangeTransition(target ATNState, start, stop int) *RangeTransition {
t := &RangeTransition{
BaseTransition: BaseTransition{
target: target,
serializationType: TransitionRANGE,
isEpsilon: false,
},
start: start,
stop: stop,
}
t.intervalSet = t.makeLabel()
return t
}
func (t *RangeTransition) makeLabel() *IntervalSet {
s := NewIntervalSet()
s.addRange(t.start, t.stop)
return s
}
func (t *RangeTransition) Matches(symbol, _, _ int) bool {
return symbol >= t.start && symbol <= t.stop
}
func (t *RangeTransition) String() string {
var sb strings.Builder
sb.WriteByte('\'')
sb.WriteRune(rune(t.start))
sb.WriteString("'..'")
sb.WriteRune(rune(t.stop))
sb.WriteByte('\'')
return sb.String()
}
type AbstractPredicateTransition interface {
Transition
IAbstractPredicateTransitionFoo()
}
type BaseAbstractPredicateTransition struct {
BaseTransition
}
func NewBasePredicateTransition(target ATNState) *BaseAbstractPredicateTransition {
return &BaseAbstractPredicateTransition{
BaseTransition: BaseTransition{
target: target,
},
}
}
func (a *BaseAbstractPredicateTransition) IAbstractPredicateTransitionFoo() {}
type PredicateTransition struct {
BaseAbstractPredicateTransition
isCtxDependent bool
ruleIndex, predIndex int
}
func NewPredicateTransition(target ATNState, ruleIndex, predIndex int, isCtxDependent bool) *PredicateTransition {
return &PredicateTransition{
BaseAbstractPredicateTransition: BaseAbstractPredicateTransition{
BaseTransition: BaseTransition{
target: target,
serializationType: TransitionPREDICATE,
isEpsilon: true,
},
},
isCtxDependent: isCtxDependent,
ruleIndex: ruleIndex,
predIndex: predIndex,
}
}
func (t *PredicateTransition) Matches(_, _, _ int) bool {
return false
}
func (t *PredicateTransition) getPredicate() *Predicate {
return NewPredicate(t.ruleIndex, t.predIndex, t.isCtxDependent)
}
func (t *PredicateTransition) String() string {
return "pred_" + strconv.Itoa(t.ruleIndex) + ":" + strconv.Itoa(t.predIndex)
}
type ActionTransition struct {
BaseTransition
isCtxDependent bool
ruleIndex, actionIndex, predIndex int
}
func NewActionTransition(target ATNState, ruleIndex, actionIndex int, isCtxDependent bool) *ActionTransition {
return &ActionTransition{
BaseTransition: BaseTransition{
target: target,
serializationType: TransitionACTION,
isEpsilon: true,
},
isCtxDependent: isCtxDependent,
ruleIndex: ruleIndex,
actionIndex: actionIndex,
}
}
func (t *ActionTransition) Matches(_, _, _ int) bool {
return false
}
func (t *ActionTransition) String() string {
return "action_" + strconv.Itoa(t.ruleIndex) + ":" + strconv.Itoa(t.actionIndex)
}
type SetTransition struct {
BaseTransition
}
func NewSetTransition(target ATNState, set *IntervalSet) *SetTransition {
t := &SetTransition{
BaseTransition: BaseTransition{
target: target,
serializationType: TransitionSET,
},
}
if set != nil {
t.intervalSet = set
} else {
t.intervalSet = NewIntervalSet()
t.intervalSet.addOne(TokenInvalidType)
}
return t
}
func (t *SetTransition) Matches(symbol, _, _ int) bool {
return t.intervalSet.contains(symbol)
}
func (t *SetTransition) String() string {
return t.intervalSet.String()
}
type NotSetTransition struct {
SetTransition
}
func NewNotSetTransition(target ATNState, set *IntervalSet) *NotSetTransition {
t := &NotSetTransition{
SetTransition: SetTransition{
BaseTransition: BaseTransition{
target: target,
serializationType: TransitionNOTSET,
},
},
}
if set != nil {
t.intervalSet = set
} else {
t.intervalSet = NewIntervalSet()
t.intervalSet.addOne(TokenInvalidType)
}
return t
}
func (t *NotSetTransition) Matches(symbol, minVocabSymbol, maxVocabSymbol int) bool {
return symbol >= minVocabSymbol && symbol <= maxVocabSymbol && !t.intervalSet.contains(symbol)
}
func (t *NotSetTransition) String() string {
return "~" + t.intervalSet.String()
}
type WildcardTransition struct {
BaseTransition
}
func NewWildcardTransition(target ATNState) *WildcardTransition {
return &WildcardTransition{
BaseTransition: BaseTransition{
target: target,
serializationType: TransitionWILDCARD,
},
}
}
func (t *WildcardTransition) Matches(symbol, minVocabSymbol, maxVocabSymbol int) bool {
return symbol >= minVocabSymbol && symbol <= maxVocabSymbol
}
func (t *WildcardTransition) String() string {
return "."
}
type PrecedencePredicateTransition struct {
BaseAbstractPredicateTransition
precedence int
}
func NewPrecedencePredicateTransition(target ATNState, precedence int) *PrecedencePredicateTransition {
return &PrecedencePredicateTransition{
BaseAbstractPredicateTransition: BaseAbstractPredicateTransition{
BaseTransition: BaseTransition{
target: target,
serializationType: TransitionPRECEDENCE,
isEpsilon: true,
},
},
precedence: precedence,
}
}
func (t *PrecedencePredicateTransition) Matches(_, _, _ int) bool {
return false
}
func (t *PrecedencePredicateTransition) getPredicate() *PrecedencePredicate {
return NewPrecedencePredicate(t.precedence)
}
func (t *PrecedencePredicateTransition) String() string {
return fmt.Sprint(t.precedence) + " >= _p"
}