TcForeign
tcForeignImports
tcForeignExports
isForeignImport
isForeignExport
tcFImport
tcFExport
tcForeignImports'
tcCheckFIType
checkCTarget
checkForeignArgs
checkForeignRes
normaliseFfiType
nonIOok
mustBeIO
checkSafe
noCheckSafe
tcForeignExports'
tcCheckFEType