77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
|
|
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
|
|
// except in compliance with the License. You may obtain a copy of the License at
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
// Unless required by applicable law or agreed to in writing, software distributed under the
|
|
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
|
|
// either express or implied. See the License for the specific language governing permissions
|
|
// and limitations under the License.
|
|
|
|
//go:generate nex query_string.nex
|
|
//go:generate sed -i "" -e s/Lexer/lexer/g query_string.nn.go
|
|
//go:generate sed -i "" -e s/Newlexer/newLexer/g query_string.nn.go
|
|
//go:generate sed -i "" -e s/debuglexer/debugLexer/g query_string.nn.go
|
|
//go:generate go fmt query_string.nn.go
|
|
//go:generate go tool yacc -o query_string.y.go query_string.y
|
|
//go:generate sed -i "" -e 1d query_string.y.go
|
|
|
|
package bleve
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
var debugParser bool
|
|
var debugLexer bool
|
|
|
|
func parseQuerySyntax(query string, mapping *IndexMapping) (rq Query, err error) {
|
|
lex := newLexerWrapper(newLexer(strings.NewReader(query)))
|
|
doParse(lex)
|
|
|
|
if len(lex.errs) > 0 {
|
|
return nil, fmt.Errorf(strings.Join(lex.errs, "\n"))
|
|
} else {
|
|
return lex.query, nil
|
|
}
|
|
}
|
|
|
|
func doParse(lex *lexerWrapper) {
|
|
defer func() {
|
|
r := recover()
|
|
if r != nil {
|
|
lex.Error("Errors while parsing.")
|
|
}
|
|
}()
|
|
|
|
yyParse(lex)
|
|
}
|
|
|
|
const (
|
|
queryShould = iota
|
|
queryMust
|
|
queryMustNot
|
|
)
|
|
|
|
type lexerWrapper struct {
|
|
nex yyLexer
|
|
errs []string
|
|
query *booleanQuery
|
|
}
|
|
|
|
func newLexerWrapper(nex yyLexer) *lexerWrapper {
|
|
return &lexerWrapper{
|
|
nex: nex,
|
|
errs: []string{},
|
|
query: NewBooleanQuery(nil, nil, nil),
|
|
}
|
|
}
|
|
|
|
func (this *lexerWrapper) Lex(lval *yySymType) int {
|
|
return this.nex.Lex(lval)
|
|
}
|
|
|
|
func (this *lexerWrapper) Error(s string) {
|
|
this.errs = append(this.errs, s)
|
|
}
|