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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"
"os"
"strconv"
)
// Provides an empty default implementation of {@link ANTLRErrorListener}. The
// default implementation of each method does nothing, but can be overridden as
// necessary.
type ErrorListener interface {
SyntaxError(recognizer Recognizer, offendingSymbol interface{}, line, column int, msg string, e RecognitionException)
ReportAmbiguity(recognizer Parser, dfa *DFA, startIndex, stopIndex int, exact bool, ambigAlts *BitSet, configs ATNConfigSet)
ReportAttemptingFullContext(recognizer Parser, dfa *DFA, startIndex, stopIndex int, conflictingAlts *BitSet, configs ATNConfigSet)
ReportContextSensitivity(recognizer Parser, dfa *DFA, startIndex, stopIndex, prediction int, configs ATNConfigSet)
}
type DefaultErrorListener struct {
}
func NewDefaultErrorListener() *DefaultErrorListener {
return new(DefaultErrorListener)
}
func (d *DefaultErrorListener) SyntaxError(recognizer Recognizer, offendingSymbol interface{}, line, column int, msg string, e RecognitionException) {
}
func (d *DefaultErrorListener) ReportAmbiguity(recognizer Parser, dfa *DFA, startIndex, stopIndex int, exact bool, ambigAlts *BitSet, configs ATNConfigSet) {
}
func (d *DefaultErrorListener) ReportAttemptingFullContext(recognizer Parser, dfa *DFA, startIndex, stopIndex int, conflictingAlts *BitSet, configs ATNConfigSet) {
}
func (d *DefaultErrorListener) ReportContextSensitivity(recognizer Parser, dfa *DFA, startIndex, stopIndex, prediction int, configs ATNConfigSet) {
}
type ConsoleErrorListener struct {
*DefaultErrorListener
}
func NewConsoleErrorListener() *ConsoleErrorListener {
return new(ConsoleErrorListener)
}
//
// Provides a default instance of {@link ConsoleErrorListener}.
//
var ConsoleErrorListenerINSTANCE = NewConsoleErrorListener()
//
// {@inheritDoc}
//
// <p>
// This implementation prints messages to {@link System//err} containing the
// values of {@code line}, {@code charPositionInLine}, and {@code msg} using
// the following format.</p>
//
// <pre>
// line <em>line</em>:<em>charPositionInLine</em> <em>msg</em>
// </pre>
//
func (c *ConsoleErrorListener) SyntaxError(recognizer Recognizer, offendingSymbol interface{}, line, column int, msg string, e RecognitionException) {
fmt.Fprintln(os.Stderr, "line "+strconv.Itoa(line)+":"+strconv.Itoa(column)+" "+msg)
}
type ProxyErrorListener struct {
*DefaultErrorListener
delegates []ErrorListener
}
func NewProxyErrorListener(delegates []ErrorListener) *ProxyErrorListener {
if delegates == nil {
panic("delegates is not provided")
}
l := new(ProxyErrorListener)
l.delegates = delegates
return l
}
func (p *ProxyErrorListener) SyntaxError(recognizer Recognizer, offendingSymbol interface{}, line, column int, msg string, e RecognitionException) {
for _, d := range p.delegates {
d.SyntaxError(recognizer, offendingSymbol, line, column, msg, e)
}
}
func (p *ProxyErrorListener) ReportAmbiguity(recognizer Parser, dfa *DFA, startIndex, stopIndex int, exact bool, ambigAlts *BitSet, configs ATNConfigSet) {
for _, d := range p.delegates {
d.ReportAmbiguity(recognizer, dfa, startIndex, stopIndex, exact, ambigAlts, configs)
}
}
func (p *ProxyErrorListener) ReportAttemptingFullContext(recognizer Parser, dfa *DFA, startIndex, stopIndex int, conflictingAlts *BitSet, configs ATNConfigSet) {
for _, d := range p.delegates {
d.ReportAttemptingFullContext(recognizer, dfa, startIndex, stopIndex, conflictingAlts, configs)
}
}
func (p *ProxyErrorListener) ReportContextSensitivity(recognizer Parser, dfa *DFA, startIndex, stopIndex, prediction int, configs ATNConfigSet) {
for _, d := range p.delegates {
d.ReportContextSensitivity(recognizer, dfa, startIndex, stopIndex, prediction, configs)
}
}
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