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| author | chessai <chessai1996@gmail.com> | 2018-10-02 14:46:08 +0200 |
|---|---|---|
| committer | Krzysztof Gogolewski <krz.gogolewski@gmail.com> | 2018-10-02 16:00:19 +0200 |
| commit | abfb91fb0ea27eb618f297b1d3ba60cfa021afe0 (patch) | |
| tree | f35b012fb723e44c015a97c69c128019755fd580 /compiler/typecheck/TcRnExports.hs | |
| parent | caffff1238097821cd2879f7285010a6565afd52 (diff) | |
| download | haskell-abfb91fb0ea27eb618f297b1d3ba60cfa021afe0.tar.gz | |
resolve T13704
Summary: allow -main-is to change export list for default module
header, allowing one to change the entry point to one's program.
Test Plan: ./validate
Reviewers: bgamari, nomeata, mpickering
Reviewed By: mpickering
Subscribers: mpickering, rwbarton, carter
GHC Trac Issues: #13704
Differential Revision: https://phabricator.haskell.org/D5189
Diffstat (limited to 'compiler/typecheck/TcRnExports.hs')
| -rw-r--r-- | compiler/typecheck/TcRnExports.hs | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/compiler/typecheck/TcRnExports.hs b/compiler/typecheck/TcRnExports.hs index dbe2b4b22b..1b57608a41 100644 --- a/compiler/typecheck/TcRnExports.hs +++ b/compiler/typecheck/TcRnExports.hs @@ -33,7 +33,7 @@ import DataCon import PatSyn import Maybes import Util (capitalise) - +import FastString (fsLit) import Control.Monad import DynFlags @@ -124,19 +124,18 @@ tcRnExports explicit_mod exports -- list, to avoid bleating about re-exporting a deprecated -- thing (especially via 'module Foo' export item) do { - -- If the module header is omitted altogether, then behave - -- as if the user had written "module Main(main) where..." - -- EXCEPT in interactive mode, when we behave as if he had + -- In interactive mode, we behave as if he had -- written "module Main where ..." - -- Reason: don't want to complain about 'main' not in scope - -- in interactive mode ; dflags <- getDynFlags + ; let default_main = case mainFunIs dflags of + Just main_fun -> mkUnqual varName (fsLit main_fun) + Nothing -> main_RDR_Unqual ; let real_exports | explicit_mod = exports | ghcLink dflags == LinkInMemory = Nothing | otherwise = Just (noLoc [noLoc (IEVar noExt - (noLoc (IEName $ noLoc main_RDR_Unqual)))]) + (noLoc (IEName $ noLoc default_main)))]) -- ToDo: the 'noLoc' here is unhelpful if 'main' -- turns out to be out of scope |