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