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