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// Copyright (c) 2017 Ernest Micklei
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package proto
import "text/scanner"
// Reserved statements declare a range of field numbers or field names that cannot be used in a message.
type Reserved struct {
Position scanner.Position
Comment *Comment
Ranges []Range
FieldNames []string
InlineComment *Comment
Parent Visitee
}
// inlineComment is part of commentInliner.
func (r *Reserved) inlineComment(c *Comment) {
r.InlineComment = c
}
// Accept dispatches the call to the visitor.
func (r *Reserved) Accept(v Visitor) {
v.VisitReserved(r)
}
func (r *Reserved) parse(p *Parser) error {
for {
pos, tok, lit := p.next()
if len(lit) == 0 {
return p.unexpected(lit, "reserved string or integer", r)
}
// first char that determined tok
ch := []rune(lit)[0]
if isDigit(ch) {
// use unread here because it could be start of ranges
p.nextPut(pos, tok, lit)
list, err := parseRanges(p, r)
if err != nil {
return err
}
r.Ranges = list
continue
}
if isString(lit) {
r.FieldNames = append(r.FieldNames, unQuote(lit))
continue
}
if tSEMICOLON == tok {
p.nextPut(pos, tok, lit)
break
}
}
return nil
}
func (r *Reserved) parent(v Visitee) { r.Parent = v }
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