Jeremy Frank jfrank-summit
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| {"valueParameterInfo":[],"slotParameterDescriptions":[],"roleDescriptions":[],"contractType":"O","contractShortDescription":"","contractName":"","contractLongDescription":"","choiceInfo":[]} |
jfrank-summit
/ Constrained.Types.fs
Last active
April 15, 2019 17:35
F# Signature File - Constrained Types
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| module StringConstraints | |
| open System | |
| let stringPattern str pattern = | |
| if String.IsNullOrEmpty(str) then | |
| let msg = sprintf "%s: Must not be null or empty" str | |
| Error msg | |
| elif System.Text.RegularExpressions.Regex.IsMatch(str, pattern) then | |
| Ok (str) | |
| else | |
| let msg = sprintf "'%s' must match the pattern '%s'" str pattern |