OptEnvConf.Reader

Read a string as-is.

This is the reader you will want to use for reading a String.

This is different from auto for strings because Read wants to parse quotes when parsing Strings.

Read via the Read instance

You cannot use this for bare strings, because Read for strings parses quotes.

Always return True

exists = Reader $ const $ pure True

Read a value as if it were specified as a String and parsed via the given Codec.

Turn a Maybe parsing function into a Reader

Turn an Either parsing function into a Reader

API note: This is a forward-compatible alias for Reader.

Turn a reader into one that parses comma separated values with that reader.

Like commaSeparated but uses a list type.

Note that this will never parse the empty list, so prefer commaSeparated if you want a more accurately typed function.

Like commaSeparated but uses a set type.

Note that this will never parse the empty list, so prefer commaSeparated if you want a more accurately typed function.

Note also that this function throws away any ordering information and ignores any duplicate values.

Separate by commas and escape commas in values

Parse comma separated string, ignore escaped commas