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caffeine_lang

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A compiler for generating reliability artifacts from service expectation definitions.

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caffeine_lang src caffeine_lang frontend token.gleam
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src/caffeine_lang/frontend/token.gleam 

/// A token with source position information.

pub type PositionedToken {

  PositionedToken(token: Token, line: Int, column: Int)

}



/// A token produced by the tokenizer.

pub type Token {

  KeywordExpectations

  KeywordUnmeasured

  KeywordMeasured

  KeywordBy

  KeywordExtends

  KeywordRequires

  KeywordProvides

  KeywordIn

  KeywordX

  KeywordString

  KeywordInteger

  KeywordFloat

  KeywordBoolean

  KeywordList

  KeywordDict

  KeywordOptional

  KeywordDefaulted

  KeywordType

  KeywordURL

  KeywordPercentage

  LiteralString(String)

  LiteralInteger(Int)

  LiteralFloat(Float)

  LiteralPercentage(Float)

  LiteralTrue

  LiteralFalse

  SymbolLeftBrace

  SymbolRightBrace

  SymbolLeftParen

  SymbolRightParen

  SymbolLeftBracket

  SymbolRightBracket

  SymbolColon

  SymbolComma

  SymbolStar

  SymbolPipe

  SymbolEquals

  SymbolDotDot

  WhitespaceNewline

  WhitespaceIndent(Int)

  CommentLine(String)

  CommentSection(String)

  Identifier(String)

  EOF

}



/// Convert token to string for error messages.

pub fn to_string(tok: Token) -> String {

  case tok {

    KeywordExpectations -> "Expectations"

    KeywordUnmeasured -> "Unmeasured"

    KeywordMeasured -> "measured"

    KeywordBy -> "by"

    KeywordExtends -> "extends"

    KeywordRequires -> "Requires"

    KeywordProvides -> "Provides"

    KeywordIn -> "in"

    KeywordX -> "x"

    KeywordString -> "String"

    KeywordInteger -> "Integer"

    KeywordFloat -> "Float"

    KeywordBoolean -> "Boolean"

    KeywordList -> "List"

    KeywordDict -> "Dict"

    KeywordOptional -> "Optional"

    KeywordDefaulted -> "Defaulted"

    KeywordType -> "Type"

    KeywordURL -> "URL"

    KeywordPercentage -> "Percentage"

    LiteralString(s) -> "\"" <> s <> "\""

    LiteralInteger(_) -> "integer"

    LiteralFloat(_) -> "float"

    LiteralPercentage(_) -> "percentage"

    LiteralTrue -> "true"

    LiteralFalse -> "false"

    SymbolLeftBrace -> "{"

    SymbolRightBrace -> "}"

    SymbolLeftParen -> "("

    SymbolRightParen -> ")"

    SymbolLeftBracket -> "["

    SymbolRightBracket -> "]"

    SymbolColon -> ":"

    SymbolComma -> ","

    SymbolStar -> "*"

    SymbolPipe -> "|"

    SymbolEquals -> "="

    SymbolDotDot -> ".."

    WhitespaceNewline -> "newline"

    WhitespaceIndent(_) -> "indent"

    CommentLine(_) -> "comment"

    CommentSection(_) -> "section comment"

    Identifier(name) -> name

    EOF -> "end of file"

  }

}