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// Copyright (c) 2012-2017 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"
type TraceListener struct {
parser *BaseParser
}
func NewTraceListener(parser *BaseParser) *TraceListener {
tl := new(TraceListener)
tl.parser = parser
return tl
}
func (t *TraceListener) VisitErrorNode(_ ErrorNode) {
}
func (t *TraceListener) EnterEveryRule(ctx ParserRuleContext) {
fmt.Println("enter " + t.parser.GetRuleNames()[ctx.GetRuleIndex()] + ", LT(1)=" + t.parser.input.LT(1).GetText())
}
func (t *TraceListener) VisitTerminal(node TerminalNode) {
fmt.Println("consume " + fmt.Sprint(node.GetSymbol()) + " rule " + t.parser.GetRuleNames()[t.parser.ctx.GetRuleIndex()])
}
func (t *TraceListener) ExitEveryRule(ctx ParserRuleContext) {
fmt.Println("exit " + t.parser.GetRuleNames()[ctx.GetRuleIndex()] + ", LT(1)=" + t.parser.input.LT(1).GetText())
}
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