ghci
The Glasgow Haskell Compiler's interactive environment.
TLDR
Start a REPL (interactive shell)
$ ghci
Start a REPL and load the specified Haskell source file
$ ghci [source_file.hs]
Start a REPL and enable a language option
$ ghci -X[language_option]
Start a REPL and enable some level of compiler warnings (e.g. all or compact)
$ ghci -W[warning_level]
Start a REPL with a colon-separated list of directories for finding source files
$ ghci -i[path/to/directory1]:[path/to/directory2]
Help
Usage:
ghci [command-line-options-and-input-files]
The kinds of input files that can be given on the command-line
include:
- Haskell source files (.hs or .lhs suffix)
- Object files (.o suffix, or .obj on Windows)
- Dynamic libraries (.so suffix, or .dll on Windows)
In addition, ghci accepts most of the command-line options that plain
GHC does. Some of the options that are commonly used are:
-i
-H32m Increase GHC's default heap size to 32m
-cpp Enable CPP processing of source files
Full details can be found in the User's Guide, an online copy of which
can be found here:
http://www.haskell.org/ghc/docs/latest/html/users_guide/
If you *really* want to see every option, then you can pass
'--show-options' to ghci.
