func textState(l *lexer.Lexer) lexer.StateFunc {
l.NextUpTo(func(r rune) bool {
return variable(r) || assignment(r) || comma(r) || whitespace(r)
})
l.Emit(TokenText)
return initialState
}
func initialState(l *lexer.Lexer) lexer.StateFunc {
r := l.IgnoreUpTo(func(r rune) bool {
return variable(r) || assignment(r) || comma(r) || nonWhitespace(r)
})
switch {
case variable(r):
return variableState
case assignment(r):
return assignmentState
case comma(r):
return commaState
case nonWhitespace(r) && r != lexer.EOF:
return textState
}
l.Emit(TokenEOF)
return nil
}
func commaState(l *lexer.Lexer) lexer.StateFunc {
l.Ignore()
l.Emit(TokenComma)
return initialState
}
func assignmentState(l *lexer.Lexer) lexer.StateFunc {
l.Ignore()
l.Emit(TokenAssignment)
return initialState
}
func variableState(l *lexer.Lexer) lexer.StateFunc {
l.Ignore()
l.NextUpTo(nonAlphanumeric)
l.Emit(TokenVariable)
return initialState
}