mueval-0.6.2: Safely evaluate Haskell expressions Source code Contents Index

Mueval.Context

Synopsis

cleanModules :: [String] -> Bool defaultModules :: [String] unsafe :: String -> Bool

Documentation

cleanModules :: [String] -> Bool Source

Return false if any of the listed modules cannot be found in the whitelist.

defaultModules :: [String] Source

Modules which we should load by default. These are of course whitelisted. Specifically, we want the Prelude because otherwise things are horribly crippled; we want SimpleReflect so we can do neat things (for said neat things, see http://twan.home.fmf.nl/blog/haskell/simple-reflection-of-expressions.details); and we want ShowQ and ShowFun to neuter IO stuff even more. The rest should be safe to import without clashes, according to the Lambdabot sources.

unsafe :: String -> Bool Source

Return true if the String contains anywhere in it any keywords associated with dangerous functions. Unfortunately, this blacklist leaks like a sieve and will return many false positives (eg. 'unsafed id "unsafed"' will evaluate to True, even though the phrase "unsafe" appears only in a String). But it will at least catch naive and simplistic invocations of unsafePerformIO, inlinePerformIO, and unsafeCoerce.

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