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99 lines
2.8 KiB
99 lines
2.8 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 ( |
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"text/scanner" |
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) |
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// Group represents a (proto2 only) group. |
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// https://developers.google.com/protocol-buffers/docs/reference/proto2-spec#group_field |
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type Group struct { |
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Position scanner.Position |
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Comment *Comment |
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Name string |
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Optional bool |
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Repeated bool |
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Required bool |
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Sequence int |
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Elements []Visitee |
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Parent Visitee |
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} |
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// Accept dispatches the call to the visitor. |
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func (g *Group) Accept(v Visitor) { |
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v.VisitGroup(g) |
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} |
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// addElement is part of elementContainer |
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func (g *Group) addElement(v Visitee) { |
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v.parent(g) |
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g.Elements = append(g.Elements, v) |
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} |
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// elements is part of elementContainer |
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func (g *Group) elements() []Visitee { |
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return g.Elements |
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} |
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// Doc is part of Documented |
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func (g *Group) Doc() *Comment { |
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return g.Comment |
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} |
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// takeLastComment is part of elementContainer |
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// removes and returns the last element of the list if it is a Comment. |
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func (g *Group) takeLastComment(expectedOnLine int) (last *Comment) { |
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last, g.Elements = takeLastCommentIfEndsOnLine(g.Elements, expectedOnLine) |
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return |
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} |
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// parse expects: |
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// groupName "=" fieldNumber { messageBody } |
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func (g *Group) parse(p *Parser) (err error) { |
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_, tok, lit := p.next() |
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if tok != tIDENT { |
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if !isKeyword(tok) { |
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return p.unexpected(lit, "group name", g) |
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} |
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} |
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g.Name = lit |
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_, tok, lit = p.next() |
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if tok != tEQUALS { |
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return p.unexpected(lit, "group =", g) |
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} |
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var i int |
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if i, err = p.nextInteger(); err != nil { |
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return p.unexpected(lit, "group sequence number", g) |
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} |
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g.Sequence = i |
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_, tok, lit = p.next() |
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if tok != tLEFTCURLY { |
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return p.unexpected(lit, "group opening {", g) |
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} |
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return parseMessageBody(p, g) |
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} |
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func (g *Group) parent(v Visitee) { g.Parent = v }
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