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35 lines
1.1 KiB
Idris
35 lines
1.1 KiB
Idris
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||| Various IEEE floating-point number constants
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module Data.Double
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||| Largest number that can be added to a floating-point number without changing
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||| its value, i.e. `1.0 + unitRoundoff == 1.0`.
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%foreign "scheme:blodwen-calcFlonumUnitRoundoff"
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"node:lambda:()=>Number.EPSILON / 2"
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export
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unitRoundoff : Double
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||| Machine epsilon is the smallest floating-point number that distinguishes two
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||| floating-point numbers; the step size on the floating-point number line.
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-- /!\ See `support/racket/support.rkt:42-45`
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-- %foreign "scheme,chez:blodwen-calcFlonumEpsilon"
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-- "scheme,racket:blodwen-flonumEpsilon"
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%foreign "scheme:blodwen-calcFlonumEpsilon"
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"node:lambda:()=>Number.EPSILON"
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export
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epsilon : Double
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||| Not a number, e.g. `0.0 / 0.0`. Never equal to anything, including itself.
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%foreign "scheme:blodwen-flonumNaN"
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"node:lambda:()=>Number.NaN"
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export
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nan : Double
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||| Positive Infinity. Can be negated to obtain Negative Infinity.
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%foreign "scheme:blodwen-flonumInf"
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"node:lambda:()=>Infinity"
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export
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inf : Double
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