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package lexer
// FlagExpiration indicates that `expiration` is supported as a first-class
// feature in the schema.
const FlagExpiration = "expiration"
type transformer func(lexeme Lexeme) (Lexeme, bool)
// Flags is a map of flag names to their corresponding transformers.
var Flags = map[string]transformer{
FlagExpiration: func(lexeme Lexeme) (Lexeme, bool) {
// `expiration` becomes a keyword.
if lexeme.Kind == TokenTypeIdentifier && lexeme.Value == "expiration" {
lexeme.Kind = TokenTypeKeyword
return lexeme, true
}
// `and` becomes a keyword.
if lexeme.Kind == TokenTypeIdentifier && lexeme.Value == "and" {
lexeme.Kind = TokenTypeKeyword
return lexeme, true
}
return lexeme, false
},
}
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