syntax.go 1.9 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566
  1. // Copyright (c) 2017 Ernest Micklei
  2. //
  3. // MIT License
  4. //
  5. // Permission is hereby granted, free of charge, to any person obtaining
  6. // a copy of this software and associated documentation files (the
  7. // "Software"), to deal in the Software without restriction, including
  8. // without limitation the rights to use, copy, modify, merge, publish,
  9. // distribute, sublicense, and/or sell copies of the Software, and to
  10. // permit persons to whom the Software is furnished to do so, subject to
  11. // the following conditions:
  12. //
  13. // The above copyright notice and this permission notice shall be
  14. // included in all copies or substantial portions of the Software.
  15. //
  16. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17. // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18. // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19. // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20. // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21. // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22. // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23. package proto
  24. import (
  25. "text/scanner"
  26. )
  27. // Syntax should have value "proto"
  28. type Syntax struct {
  29. Position scanner.Position
  30. Comment *Comment
  31. Value string
  32. InlineComment *Comment
  33. Parent Visitee
  34. }
  35. func (s *Syntax) parse(p *Parser) error {
  36. if _, tok, lit := p.next(); tok != tEQUALS {
  37. return p.unexpected(lit, "syntax =", s)
  38. }
  39. _, _, lit := p.next()
  40. if !isString(lit) {
  41. return p.unexpected(lit, "syntax string constant", s)
  42. }
  43. s.Value = unQuote(lit)
  44. return nil
  45. }
  46. // Accept dispatches the call to the visitor.
  47. func (s *Syntax) Accept(v Visitor) {
  48. v.VisitSyntax(s)
  49. }
  50. // Doc is part of Documented
  51. func (s *Syntax) Doc() *Comment {
  52. return s.Comment
  53. }
  54. // inlineComment is part of commentInliner.
  55. func (s *Syntax) inlineComment(c *Comment) {
  56. s.InlineComment = c
  57. }
  58. func (s *Syntax) parent(v Visitee) { s.Parent = v }