caffeine_lang - v5.0.1

caffeine_query_language/ast

Types

Comparator

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Comparators for time slice expressions.

pub type Comparator {
  LessThan
  LessThanOrEqualTo
  GreaterThan
  GreaterThanOrEqualTo
}

Constructors 

  • LessThan
  • LessThanOrEqualTo
  • GreaterThan
  • GreaterThanOrEqualTo

CqlParsed

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Marker type for parsed CQL expressions (pre-substitution).

pub type CqlParsed

Exp

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An expression in the CQL AST, either an operator expression or a primary. The phantom state parameter tracks whether words have been substituted.

pub type Exp(state) {
  TimeSliceExpr(spec: TimeSliceExp)
  OperatorExpr(
    numerator: Exp(state),
    denominator: Exp(state),
    operator: Operator,
  )
  Primary(primary: Primary(state))
}

Constructors

Operator

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Arithmetic operators supported in CQL expressions.

pub type Operator {
  Add
  Sub
  Mul
  Div
}

Constructors 

  • Add
  • Sub
  • Mul
  • Div

Primary

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A primary expression, either a word (identifier) or a parenthesized expression. The phantom state parameter mirrors the parent Exp’s state.

pub type Primary(state) {
  PrimaryWord(word: Word)
  PrimaryExp(exp: Exp(state))
}

Constructors 

  • PrimaryWord(word: Word)
  • PrimaryExp(exp: Exp(state))

Substituted

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Marker type for substituted CQL expressions (post-substitution).

pub type Substituted

TimeSliceExp

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Time slice specification containing query, comparator, threshold, and interval.

pub type TimeSliceExp {
  TimeSliceExp(
    query: String,
    comparator: Comparator,
    threshold: Float,
    interval_seconds: Float,
  )
}

Constructors 

  • TimeSliceExp(
  query: String,
  comparator: Comparator,
  threshold: Float,
  interval_seconds: Float,
)

Word

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A word (identifier) in the expression.

pub type Word {
  Word(value: String)
}

Constructors 

  • Word(value: String)
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