Commit 70349c32 authored by simonpj's avatar simonpj
Browse files

[project @ 2005-07-25 11:08:26 by simonpj]


Make the "root main" Id :Main.main into an *implicit* Id, whose parent is
Main.main.  What that means is that the "root main" Id won't be emitted
into the interface file.  Which has not been causing a problem in practice
but is clearly wrong -- there were two 'main's in the interface file.
parent a2da0796
......@@ -268,7 +268,7 @@ rANDOM = mkModule "System.Random"
gLA_EXTS = mkModule "GHC.Exts"
rOOT_MAIN = mkModule ":Main" -- Root module for initialisation
-- The ':xxx' makes a moudle name that the user can never
-- The ':xxx' makes a module name that the user can never
-- use himself. The z-encoding for ':' is "ZC", so the z-encoded
-- module name still starts with a capital letter, which keeps
-- the z-encoded version consistent.
......@@ -435,7 +435,6 @@ and it's convenient to write them all down in one place.
rootMainName = varQual rOOT_MAIN FSLIT("main") rootMainKey
runMainIOName = varQual pREL_TOP_HANDLER FSLIT("runMainIO") runMainKey
orderingTyConName = tcQual pREL_BASE FSLIT("Ordering") orderingTyConKey
......@@ -33,7 +33,7 @@ import HsSyn ( HsModule(..), HsExtCore(..), HsGroup(..), LHsDecl,
nlHsApp, nlHsVar, pprLHsBinds )
import RdrHsSyn ( findSplice )
import PrelNames ( runMainIOName, rootMainName, mAIN,
import PrelNames ( runMainIOName, rootMainKey, rOOT_MAIN, mAIN,
main_RDR_Unqual )
import RdrName ( RdrName, mkRdrUnqual, emptyGlobalRdrEnv )
import TcHsSyn ( zonkTopDecls )
......@@ -63,8 +63,9 @@ import ErrUtils ( Messages, mkDumpDoc, showPass )
import Id ( Id, mkExportedLocalId, isLocalId, idName, idType )
import Var ( Var )
import Module ( Module, ModuleEnv, mkModule, moduleEnvElts, elemModuleEnv )
import OccName ( mkVarOcc )
import Name ( Name, NamedThing(..), isExternalName, getSrcLoc, isWiredInName )
import OccName ( mkVarOcc, mkOccFS, varName )
import Name ( Name, NamedThing(..), isExternalName, getSrcLoc, isWiredInName,
mkExternalName )
import NameSet
import TyCon ( tyConHasGenerics, isSynTyCon, getSynTyConDefn, tyConKind )
import SrcLoc ( srcLocSpan, Located(..), noLoc )
......@@ -83,7 +84,7 @@ import Outputable
#ifdef GHCI
import HsSyn ( HsStmtContext(..), Stmt(..), HsExpr(..),
HsLocalBinds(..), HsValBinds(..),
LStmt, LHsExpr, LHsType, mkVarBind,
LStmt, LHsExpr, LHsType, mkVarBind,
collectLStmtsBinders, collectLStmtBinders, nlVarPat,
placeHolderType, noSyntaxExpr )
import RdrName ( GlobalRdrElt(..), globalRdrEnvElts,
......@@ -764,8 +765,23 @@ check_main ghci_mode tcg_env main_mod main_fn
; (main_expr, ty) <- setSrcSpan (srcLocSpan (getSrcLoc main_name)) $
tcInferRho rhs
; let { root_main_id = mkExportedLocalId rootMainName ty ;
main_bind = noLoc (VarBind root_main_id main_expr) }
-- The function that the RTS invokes is always :Main.main,
-- which we call root_main_id.
-- (Because GHC allows the user to have a module not called
-- Main as the main module, we can't rely on the main function
-- being called "Main.main". That's why root_main_id has a fixed
-- module ":Main".)
-- We also make root_main_id an implicit Id, by making main_name
-- its parent (hence (Just main_name)). That has the effect
-- of preventing its type and unfolding from getting out into
-- the interface file. Otherwise we can end up with two defns
-- for 'main' in the interface file!
; let { root_main_name = mkExternalName rootMainKey rOOT_MAIN
(mkOccFS varName FSLIT("main"))
(Just main_name) (getSrcLoc main_name)
; root_main_id = mkExportedLocalId root_main_name ty
; main_bind = noLoc (VarBind root_main_id main_expr) }
; return (tcg_env { tcg_binds = tcg_binds tcg_env
`snocBag` main_bind,
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