[
  {"type":"CommentSingle","value":"-- we can define our own structural data types"},
  {"type":"TextWhitespace","value":"\n"},
  {"type":"KeywordReserved","value":"type"},
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  {"type":"NameClass","value":"Point"},
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  {"type":"TextWhitespace","value":" "},
  {"type":"NameClass","value":"number"},
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  {"type":"TextWhitespace","value":" "},
  {"type":"NameClass","value":"y"},
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  {"type":"TextWhitespace","value":" "},
  {"type":"NameClass","value":"number"},
  {"type":"TextWhitespace","value":" "},
  {"type":"Punctuation","value":"}"},
  {"type":"TextWhitespace","value":"\n"},
  {"type":"CommentSingle","value":"-- and we can annotate variables (and function arguments) with them)"},
  {"type":"TextWhitespace","value":"\n"},
  {"type":"KeywordDeclaration","value":"local"},
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  {"type":"Name","value":"p"},
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  {"type":"TextWhitespace","value":"\n\n"},
  {"type":"CommentSingle","value":"-- and we can see that accessing an invalid field from a table raises a type error!"},
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  {"type":"NameOther","value":"print"},
  {"type":"Punctuation","value":"("},
  {"type":"Name","value":"p.z"},
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