// This file holds a list of keywords/symbols for the Rhai language, with mapping to
// an appropriate `Token` variant.
//
// Generate the output table via:
// ```bash
// gperf -t keywords.txt
// ```
//
// Since GNU gperf does not produce Rust output, the ANSI-C output must be hand-edited and
// manually spliced into `tokenizer.rs`.
//
// This includes:
// * Rewrite the C hashing program (especially since it uses a `switch` statement with fall-through)
//   into equivalent Rust as the function `lookup_symbol_from_syntax`.
// * Update the values for the `???_KEYWORD_???` constants.
// * Copy the `asso_values` array into `KEYWORD_ASSOC_VALUES`.
// * Copy the `wordlist` array into `KEYWORDS_LIST` with the following modifications:
//   - Remove the `#line` comments
//   - Change the entry wrapping `{ .. }` into tuples `( .. )`
//   - Replace all entries `("")` by `("", Token::EOF)`
//   - Put feature flags on the appropriate lines, and duplicating lines that maps to `Token::EOF`
//     for the opposite feature flags
//
struct keyword;
%%
"{",        Token::LeftBrace
"}",        Token::RightBrace
"(",        Token::LeftParen
")",        Token::RightParen
"[",        Token::LeftBracket
"]",        Token::RightBracket
"()",       Token::Unit
"+",        Token::Plus
"-",        Token::Minus
"*",        Token::Multiply
"/",        Token::Divide
";",        Token::SemiColon
":",        Token::Colon
"::",       Token::DoubleColon
"=>",       Token::DoubleArrow
"_",        Token::Underscore
",",        Token::Comma
".",        Token::Period
"?.",       Token::Elvis
"??",       Token::DoubleQuestion
"?[",       Token::QuestionBracket
"..",       Token::ExclusiveRange
"..=",      Token::InclusiveRange
"#{",       Token::MapStart
"=",        Token::Equals
"true",     Token::True
"false",    Token::False
"let",      Token::Let
"const",    Token::Const
"if",       Token::If
"else",     Token::Else
"switch",   Token::Switch
"do",       Token::Do
"while",    Token::While
"until",    Token::Until
"loop",     Token::Loop
"for",      Token::For
"in",       Token::In
"!in",      Token::NotIn
"<",        Token::LessThan
">",        Token::GreaterThan
"<=",       Token::LessThanEqualsTo
">=",       Token::GreaterThanEqualsTo
"==",       Token::EqualsTo
"!=",       Token::NotEqualsTo
"!",        Token::Bang
"|",        Token::Pipe
"||",       Token::Or
"&",        Token::Ampersand
"&&",       Token::And
"continue", Token::Continue
"break",    Token::Break
"return",   Token::Return
"throw",    Token::Throw
"try",      Token::Try
"catch",    Token::Catch
"+=",       Token::PlusAssign
"-=",       Token::MinusAssign
"*=",       Token::MultiplyAssign
"/=",       Token::DivideAssign
"<<=",      Token::LeftShiftAssign
">>=",      Token::RightShiftAssign
"&=",       Token::AndAssign
"|=",       Token::OrAssign
"^=",       Token::XOrAssign
"<<",       Token::LeftShift
">>",       Token::RightShift
"^",        Token::XOr
"%",        Token::Modulo
"%=",       Token::ModuloAssign
"**",       Token::PowerOf
"**=",      Token::PowerOfAssign
"fn",       Token::Fn
"private",  Token::Private
"import",   Token::Import
"export",   Token::Export
"as",       Token::As