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Within LTS Haskell 24.42 (ghc-9.10.3)
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readFile :: MonadIO m => FilePath -> m LByteStringrio RIO.ByteString.Lazy Lifted readFile
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rio RIO.Char Read a string representation of a character, using Haskell source-language escape conventions, and convert it to the character that it encodes. For example:
readLitChar "\\nHello" = [('\n', "Hello")] readMaybe :: Read a => String -> Maybe ario RIO.Prelude Parse a string using the Read instance. Succeeds if there is exactly one valid result.
>>> readMaybe "123" :: Maybe Int Just 123
>>> readMaybe "hello" :: Maybe Int Nothing
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rio RIO.Process Run a process, capture its standard output and error as a ByteString, wait for it to complete, and then return its exit code, output, and error. Note that any previously used setStdout or setStderr will be overridden.
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rio RIO.Process Same as readProcess, but only read the stderr of the process. Original settings for stdout remain.
readProcessStderr_ :: MonadIO m => ProcessConfig stdin stdout stderrIgnored -> m ByteStringrio RIO.Process Same as readProcessStderr, but instead of returning the ExitCode, checks it with checkExitCode. Exceptions thrown by this function will include stderr.
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rio RIO.Process Same as readProcess, but only read the stdout of the process. Original settings for stderr remain.
readProcessStdout_ :: MonadIO m => ProcessConfig stdin stdoutIgnored stderr -> m ByteStringrio RIO.Process Same as readProcessStdout, but instead of returning the ExitCode, checks it with checkExitCode. Exceptions thrown by this function will include stdout.
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rio RIO.Process Same as readProcess, but instead of returning the ExitCode, checks it with checkExitCode. Exceptions thrown by this function will include stdout and stderr.
readPTime :: ParseTime t => Bool -> TimeLocale -> String -> ReadP trio RIO.Time Parse a time value given a format string. See parseTimeM for details.