mirror of
https://github.com/openziti/ziti.git
synced 2026-10-23 04:06:50 +00:00
Paul Lorenz
103 lines
2.6 KiB
Go
103 lines
2.6 KiB
Go
/*
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Copyright NetFoundry, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package zitiql
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import (
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"fmt"
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"github.com/antlr/antlr4/runtime/Go/antlr"
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)
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func parse(str string, l ZitiQlListener, el antlr.ErrorListener, debug bool) {
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input := antlr.NewInputStream(str)
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lexer := NewZitiQlLexer(input)
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stream := antlr.NewCommonTokenStream(lexer, 0)
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p := NewZitiQlParser(stream)
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if debug {
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p.AddErrorListener(antlr.NewDiagnosticErrorListener(true))
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} else {
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p.RemoveErrorListeners()
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}
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p.AddErrorListener(el)
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p.BuildParseTrees = true
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tree := p.Start()
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antlr.ParseTreeWalkerDefault.Walk(l, tree)
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}
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func Parse(str string, l ZitiQlListener) []ParseError {
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el := newErrorListener()
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parse(str, l, el, false)
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return el.Errors
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}
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func ParseWithDebug(str string, l ZitiQlListener) []ParseError {
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el := newErrorListener()
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parse(str, l, el, true)
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return el.Errors
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}
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type ParseError struct {
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Line int
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Column int
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Symbol string
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Message string
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}
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func newErrorListener() *ErrorListener {
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return &ErrorListener{
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Errors: []ParseError{},
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}
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}
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type ErrorListener struct {
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Errors []ParseError
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}
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func (el *ErrorListener) SyntaxError(recognizer antlr.Recognizer, offendingSymbol interface{}, line, column int, msg string, e antlr.RecognitionException) {
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s, ok := offendingSymbol.(*antlr.CommonToken)
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symbol := "<unknown>"
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if ok {
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symbol = s.GetText()
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}
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el.Errors = append(el.Errors, ParseError{
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Line: line,
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Column: column,
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Symbol: symbol,
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Message: fmt.Sprintf(`Unexpected symbol: "%s" at line: %d column: %d`, s.GetText(), line, column),
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})
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}
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func (el *ErrorListener) ReportAmbiguity(recognizer antlr.Parser, dfa *antlr.DFA, startIndex, stopIndex int, exact bool, ambigAlts *antlr.BitSet, configs antlr.ATNConfigSet) {
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// ignored
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}
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func (el *ErrorListener) ReportAttemptingFullContext(recognizer antlr.Parser, dfa *antlr.DFA, startIndex, stopIndex int, conflictingAlts *antlr.BitSet, configs antlr.ATNConfigSet) {
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// ignored
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}
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func (el *ErrorListener) ReportContextSensitivity(recognizer antlr.Parser, dfa *antlr.DFA, startIndex, stopIndex, prediction int, configs antlr.ATNConfigSet) {
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// ignored
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}
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