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package parser
func initJson(l *lexer) stateFunc {
ignoreWhiteSpace(l)
switch {
case l.Accept("{"):
l.Emit(lObjectStart)
return stateInObject
case l.Accept("["):
l.Emit(lArrayStart)
case l.Peek() == eof:
return nil
}
return l.Errorf("Unknown token: %s", string(l.Peek()))
}
func stateInObject(l *lexer) stateFunc {
// we in object, so we expect field keys and values
ignoreWhiteSpace(l)
if l.Accept("}") {
l.Emit(lObjectEnd)
// If meet close object return to previous state (including initial)
return l.PopState()
}
ignoreWhiteSpace(l)
l.Accept(",")
ignoreWhiteSpace(l)
if !scanQuotedString(l, '"') {
return l.Errorf("Unknown token: %s", string(l.Peek()))
}
l.Emit(lObjectKey)
ignoreWhiteSpace(l)
if !l.Accept(":") {
return l.Errorf("Expected ':'")
}
ignoreWhiteSpace(l)
l.Emit(lObjectValue)
switch {
case scanQuotedString(l, '"'):
l.Emit(lString)
ignoreWhiteSpace(l)
l.Accept(",")
l.Ignore()
ignoreWhiteSpace(l)
return stateInObject
case scanNumber(l):
l.Emit(lNumber)
ignoreWhiteSpace(l)
l.Accept(",")
l.Ignore()
ignoreWhiteSpace(l)
return stateInObject
case l.AcceptAnyOf([]string{"true", "false"}, true):
l.Emit(lBoolean)
ignoreWhiteSpace(l)
l.Accept(",")
l.Ignore()
ignoreWhiteSpace(l)
return stateInObject
case l.AcceptString("null", true):
l.Emit(lNull)
ignoreWhiteSpace(l)
l.Accept(",")
l.Ignore()
ignoreWhiteSpace(l)
return stateInObject
case l.Accept("{"):
l.Emit(lObjectStart)
l.PushState(stateInObject)
return stateInObject
case l.Accept("["):
l.Emit(lArrayStart)
l.PushState(stateInObject)
return stateInArray
}
return l.Errorf("Unknown token: %s", string(l.Peek()))
}
func stateInArray(l *lexer) stateFunc {
ignoreWhiteSpace(l)
l.Accept(",")
ignoreWhiteSpace(l)
switch {
case scanQuotedString(l, '"'):
l.Emit(lString)
case scanNumber(l):
l.Emit(lNumber)
case l.AcceptAnyOf([]string{"true", "false"}, true):
l.Emit(lBoolean)
case l.AcceptString("null", true):
l.Emit(lNull)
case l.Accept("{"):
l.Emit(lObjectStart)
l.PushState(stateInArray)
return stateInObject
case l.Accept("["):
l.Emit(lArrayStart)
l.PushState(stateInArray)
return stateInArray
case l.Accept("]"):
l.Emit(lArrayEnd)
return l.PopState()
}
return stateInArray
}
func ignoreWhiteSpace(l *lexer) {
l.AcceptWhile(" \n\t") // ignore whitespaces
l.Ignore()
}
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