update dependencies (#6267)

Signed-off-by: hongming <coder.scala@gmail.com>

vendor/github.com/antlr4-go/antlr/v4/prediction_context_cache.go

@@ -0,0 +1,48 @@
+package antlr
+
+var BasePredictionContextEMPTY = &PredictionContext{
+	cachedHash:  calculateEmptyHash(),
+	pcType:      PredictionContextEmpty,
+	returnState: BasePredictionContextEmptyReturnState,
+}
+
+// PredictionContextCache is Used to cache [PredictionContext] objects. It is used for the shared
+// context cash associated with contexts in DFA states. This cache
+// can be used for both lexers and parsers.
+type PredictionContextCache struct {
+	cache *JMap[*PredictionContext, *PredictionContext, Comparator[*PredictionContext]]
+}
+
+func NewPredictionContextCache() *PredictionContextCache {
+	return &PredictionContextCache{
+		cache: NewJMap[*PredictionContext, *PredictionContext, Comparator[*PredictionContext]](pContextEqInst, PredictionContextCacheCollection, "NewPredictionContextCache()"),
+	}
+}
+
+// Add a context to the cache and return it. If the context already exists,
+// return that one instead and do not add a new context to the cache.
+// Protect shared cache from unsafe thread access.
+func (p *PredictionContextCache) add(ctx *PredictionContext) *PredictionContext {
+	if ctx.isEmpty() {
+		return BasePredictionContextEMPTY
+	}
+
+	// Put will return the existing entry if it is present (note this is done via Equals, not whether it is
+	// the same pointer), otherwise it will add the new entry and return that.
+	//
+	existing, present := p.cache.Get(ctx)
+	if present {
+		return existing
+	}
+	p.cache.Put(ctx, ctx)
+	return ctx
+}
+
+func (p *PredictionContextCache) Get(ctx *PredictionContext) (*PredictionContext, bool) {
+	pc, exists := p.cache.Get(ctx)
+	return pc, exists
+}
+
+func (p *PredictionContextCache) length() int {
+	return p.cache.Len()
+}