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* Reorganisation of the source treeSimon Marlow2006-04-071-540/+0
| | | | | | | | | | | | | | | Most of the other users of the fptools build system have migrated to Cabal, and with the move to darcs we can now flatten the source tree without losing history, so here goes. The main change is that the ghc/ subdir is gone, and most of what it contained is now at the top level. The build system now makes no pretense at being multi-project, it is just the GHC build system. No doubt this will break many things, and there will be a period of instability while we fix the dependencies. A straightforward build should work, but I haven't yet fixed binary/source distributions. Changes to the Building Guide will follow, too.
* [project @ 2005-10-25 12:48:35 by simonmar]simonmar2005-10-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Two changes from Krasimir Angelov, which were required for Visual Haskell: - messaging cleanup throughout the compiler. DynFlags has a new field: log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO () this action is invoked for every message generated by the compiler. This means a client of the GHC API can direct messages to any destination, or collect them up in an IORef for later perusal. This replaces previous hacks to redirect messages in the GHC API (hence some changes to function types in GHC.hs). - The JustTypecheck mode of GHC now does what it says. It doesn't run any of the compiler passes beyond the typechecker for each module, but does generate the ModIface in order that further modules can be typechecked. And one change from me: - implement the LANGUAGE pragma, finally
* [project @ 2005-08-02 14:56:50 by simonmar]simonmar2005-08-021-5/+2
| | | | | - move instance Show FastString into FastString module - instance Outputable FastString should use ftext instead of unpackFS
* [project @ 2005-07-11 10:46:42 by simonpj]simonpj2005-07-111-3/+12
| | | | Improvements to speakN, define speakNOf, move plural from TcSimplify
* [project @ 2005-07-11 09:48:19 by simonpj]simonpj2005-07-111-5/+15
| | | | Add speakN, and the ability to set printing depth
* [project @ 2005-05-17 13:05:45 by simonmar]simonmar2005-05-171-4/+4
| | | | Add showSDocDump
* [project @ 2005-03-18 13:37:27 by simonmar]simonmar2005-03-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Flags cleanup. Basically the purpose of this commit is to move more of the compiler's global state into DynFlags, which is moving in the direction we need to go for the GHC API which can have multiple active sessions supported by a single GHC instance. Before: $ grep 'global_var' */*hs | wc -l 78 After: $ grep 'global_var' */*hs | wc -l 27 Well, it's an improvement. Most of what's left won't really affect our ability to host multiple sessions. Lots of static flags have become dynamic flags (yay!). Notably lots of flags that we used to think of as "driver" flags, like -I and -L, are now dynamic. The most notable static flags left behind are the "way" flags, eg. -prof. It would be nice to fix this, but it isn't urgent. On the way, lots of cleanup has happened. Everything related to static and dynamic flags lives in StaticFlags and DynFlags respectively, and they share a common command-line parser library in CmdLineParser. The flags related to modes (--makde, --interactive etc.) are now private to the front end: in fact private to Main itself, for now.
* [project @ 2005-03-08 17:12:51 by simonmar]simonmar2005-03-081-8/+22
| | | | | | | | | | Fix something that's been bugging me for a while: by default, -ddump-* output doesn't include uniques when it outputs internal names, but in most cases you need them because the output hasn't been tidied, so you end up doing -dppr-debug which is overkill. Now, -ddump-* prints uniques for internal names by default. This shouldn't affect anything else.
* [project @ 2005-01-18 12:18:11 by simonpj]simonpj2005-01-181-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ------------------------ Reorganisation of hi-boot files ------------------------ The main point of this commit is to arrange that in the Compilation Manager's dependendency graph, hi-boot files are proper nodes. This is important to make sure that we compile everything in the right order. It's a step towards hs-boot files. * The fundamental change is that CompManager.ModSummary has a new field, ms_boot :: IsBootInterface I also tided up CompManager a bit. No change to the Basic Plan. ModSummary is now exported abstractly from CompManager (was concrete) * Hi-boot files now have import declarations. The idea is they are compulsory, so that the dependency analyser can find them * I changed an invariant: the Compilation Manager used to ensure that hscMain was given a HomePackageTable only for the modules 'below' the one being compiled. This was really only important for instances and rules, and it was a bit inconvenient. So I moved the filter to the compiler itself: see HscTypes.hptInstances and hptRules. * Module Packages.hs now defines data PackageIdH = HomePackage -- The "home" package is the package -- curently being compiled | ExtPackage PackageId -- An "external" package is any other package It was just a Maybe type before, so this makes it a bit clearer. * I tried to add a bit better location info to the IfM monad, so that errors in interfaces come with a slightly more helpful error message. See the if_loc field in TcRnTypes --- and follow-on consequences * Changed Either to Maybes.MaybeErr in a couple of places (more perspicuous)
* [project @ 2004-11-26 16:19:45 by simonmar]simonmar2004-11-261-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Further integration with the new package story. GHC now supports pretty much everything in the package proposal. - GHC now works in terms of PackageIds (<pkg>-<version>) rather than just package names. You can still specify package names without versions on the command line, as long as the name is unambiguous. - GHC understands hidden/exposed modules in a package, and will refuse to import a hidden module. Also, the hidden/eposed status of packages is taken into account. - I had to remove the old package syntax from ghc-pkg, backwards compatibility isn't really practical. - All the package.conf.in files have been rewritten in the new syntax, and contain a complete list of modules in the package. I've set all the versions to 1.0 for now - please check your package(s) and fix the version number & other info appropriately. - New options: -hide-package P sets the expose flag on package P to False -ignore-package P unregisters P for this compilation For comparison, -package P sets the expose flag on package P to True, and also causes P to be linked in eagerly. -package-name is no longer officially supported. Unofficially, it's a synonym for -ignore-package, which has more or less the same effect as -package-name used to. Note that a package may be hidden and yet still be linked into the program, by virtue of being a dependency of some other package. To completely remove a package from the compiler's internal database, use -ignore-package. The compiler will complain if any two packages in the transitive closure of exposed packages contain the same module. You *must* use -ignore-package P when compiling modules for package P, if package P (or an older version of P) is already registered. The compiler will helpfully complain if you don't. The fptools build system does this. - Note: the Cabal library won't work yet. It still thinks GHC uses the old package config syntax. Internal changes/cleanups: - The ModuleName type has gone away. Modules are now just (a newtype of) FastStrings, and don't contain any package information. All the package-related knowledge is in DynFlags, which is passed down to where it is needed. - DynFlags manipulation has been cleaned up somewhat: there are no global variables holding DynFlags any more, instead the DynFlags are passed around properly. - There are a few less global variables in GHC. Lots more are scheduled for removal. - -i is now a dynamic flag, as are all the package-related flags (but using them in {-# OPTIONS #-} is Officially Not Recommended). - make -j now appears to work under fptools/libraries/. Probably wouldn't take much to get it working for a whole build.
* [project @ 2004-09-30 10:35:15 by simonpj]simonpj2004-09-301-8/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ------------------------------------ Add Generalised Algebraic Data Types ------------------------------------ This rather big commit adds support for GADTs. For example, data Term a where Lit :: Int -> Term Int App :: Term (a->b) -> Term a -> Term b If :: Term Bool -> Term a -> Term a ..etc.. eval :: Term a -> a eval (Lit i) = i eval (App a b) = eval a (eval b) eval (If p q r) | eval p = eval q | otherwise = eval r Lots and lots of of related changes throughout the compiler to make this fit nicely. One important change, only loosely related to GADTs, is that skolem constants in the typechecker are genuinely immutable and constant, so we often get better error messages from the type checker. See TcType.TcTyVarDetails. There's a new module types/Unify.lhs, which has purely-functional unification and matching for Type. This is used both in the typechecker (for type refinement of GADTs) and in Core Lint (also for type refinement).
* [project @ 2004-08-16 09:53:47 by simonpj]simonpj2004-08-161-7/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ------------------------------- Add instance information to :i Get rid of the DeclPool ------------------------------- 1. Add instance information to :info command. GHCi now prints out which instances a type or class belongs to, when you use :i 2. Tidy up printing of unqualified names in user output. Previously Outputable.PrintUnqualified was type PrintUnqualified = Name -> Bool but it's now type PrintUnqualified = ModuleName -> OccName -> Bool This turns out to be tidier even for Names, and it's now also usable when printing IfaceSyn stuff in GHCi, eliminating a grevious hack. 3. On the way to doing this, Simon M had the great idea that we could get rid of the DeclPool holding pen, which held declarations read from interface files but not yet type-checked. We do this by eagerly populating the TypeEnv with thunks what, when poked, do the type checking. This is just a logical continuation of lazy import mechanism we've now had for some while. The InstPool and RulePool still exist, but I plan to get rid of them in the same way. The new scheme does mean that more rules get sucked in than before, because previously the TypeEnv was used to mean "this thing was needed" and hence to control which rules were sucked in. But now the TypeEnv is populated more eagerly => more rules get sucked in. However this problem will go away when I get rid of the Inst and Rule pools. I should have kept these changes separate, but I didn't. Change (1) affects mainly TcRnDriver, HscMain, CompMan, InteractiveUI whereas change (3) is more wide ranging.
* [project @ 2004-03-11 14:29:29 by simonpj]simonpj2004-03-111-2/+2
| | | | Better layout in interppSP
* [project @ 2003-12-30 14:05:46 by simonpj]simonpj2003-12-301-1/+1
| | | | Import trimming
* [project @ 2003-12-10 14:15:16 by simonmar]simonmar2003-12-101-36/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add accurate source location annotations to HsSyn ------------------------------------------------- Every syntactic entity in HsSyn is now annotated with a SrcSpan, which details the exact beginning and end points of that entity in the original source file. All honest compilers should do this, and it was about time GHC did the right thing. The most obvious benefit is that we now have much more accurate error messages; when running GHC inside emacs for example, the cursor will jump to the exact location of an error, not just a line somewhere nearby. We haven't put a huge amount of effort into making sure all the error messages are accurate yet, so there could be some tweaking still needed, although the majority of messages I've seen have been spot-on. Error messages now contain a column number in addition to the line number, eg. read001.hs:25:10: Variable not in scope: `+#' To get the full text span info, use the new option -ferror-spans. eg. read001.hs:25:10-11: Variable not in scope: `+#' I'm not sure whether we should do this by default. Emacs won't understand the new error format, for one thing. In a more elaborate editor setting (eg. Visual Studio), we can arrange to actually highlight the subexpression containing an error. Eventually this information will be used so we can find elements in the abstract syntax corresponding to text locations, for performing high-level editor functions (eg. "tell me the type of this expression I just highlighted"). Performance of the compiler doesn't seem to be adversely affected. Parsing is still quicker than in 6.0.1, for example. Implementation: This was an excrutiatingly painful change to make: both Simon P.J. and myself have been working on it for the last three weeks or so. The basic changes are: - a new datatype SrcSpan, which represents a beginning and end position in a source file. - To reduce the pain as much as possible, we also defined: data Located e = L SrcSpan e - Every datatype in HsSyn has an equivalent Located version. eg. type LHsExpr id = Located (HsExpr id) and pretty much everywhere we used to use HsExpr we now use LHsExpr. Believe me, we thought about this long and hard, and all the other options were worse :-) Additional changes/cleanups we made at the same time: - The abstract syntax for bindings is now less arcane. MonoBinds and HsBinds with their built-in list constructors have gone away, replaced by HsBindGroup and HsBind (see HsSyn/HsBinds.lhs). - The various HsSyn type synonyms have now gone away (eg. RdrNameHsExpr, RenamedHsExpr, and TypecheckedHsExpr are now HsExpr RdrName, HsExpr Name, and HsExpr Id respectively). - Utilities over HsSyn are now collected in a new module HsUtils. More stuff still needs to be moved in here. - MachChar now has a real Char instead of an Int. All GHC versions that can compile GHC now support 32-bit Chars, so this was a simplification.
* [project @ 2003-10-27 14:06:06 by simonpj]simonpj2003-10-271-1/+1
| | | | Always qualify in defaultErrStyle
* [project @ 2003-10-09 11:58:39 by simonpj]simonpj2003-10-091-5/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ------------------------- GHC heart/lung transplant ------------------------- This major commit changes the way that GHC deals with importing types and functions defined in other modules, during renaming and typechecking. On the way I've changed or cleaned up numerous other things, including many that I probably fail to mention here. Major benefit: GHC should suck in many fewer interface files when compiling (esp with -O). (You can see this with -ddump-rn-stats.) It's also some 1500 lines of code shorter than before. ** So expect bugs! I can do a 3-stage bootstrap, and run ** the test suite, but you may be doing stuff I havn't tested. ** Don't update if you are relying on a working HEAD. In particular, (a) External Core and (b) GHCi are very little tested. But please, please DO test this version! ------------------------ Big things ------------------------ Interface files, version control, and importing declarations ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * There is a totally new data type for stuff that lives in interface files: Original names IfaceType.IfaceExtName Types IfaceType.IfaceType Declarations (type,class,id) IfaceSyn.IfaceDecl Unfoldings IfaceSyn.IfaceExpr (Previously we used HsSyn for type/class decls, and UfExpr for unfoldings.) The new data types are in iface/IfaceType and iface/IfaceSyn. They are all instances of Binary, so they can be written into interface files. Previous engronkulation concering the binary instance of RdrName has gone away -- RdrName is not an instance of Binary any more. Nor does Binary.lhs need to know about the ``current module'' which it used to, which made it specialised to GHC. A good feature of this is that the type checker for source code doesn't need to worry about the possibility that we might be typechecking interface file stuff. Nor does it need to do renaming; we can typecheck direct from IfaceSyn, saving a whole pass (module TcIface) * Stuff from interface files is sucked in *lazily*, rather than being eagerly sucked in by the renamer. Instead, we use unsafeInterleaveIO to capture a thunk for the unfolding of an imported function (say). If that unfolding is every pulled on, TcIface will scramble over the unfolding, which may in turn pull in the interface files of things mentioned in the unfolding. The External Package State is held in a mutable variable so that it can be side-effected by this lazy-sucking-in process (which may happen way later, e.g. when the simplifier runs). In effect, the EPS is a kind of lazy memo table, filled in as we suck things in. Or you could think of it as a global symbol table, populated on demand. * This lazy sucking is very cool, but it can lead to truly awful bugs. The intent is that updates to the symbol table happen atomically, but very bad things happen if you read the variable for the table, and then force a thunk which updates the table. Updates can get lost that way. I regret this subtlety. One example of the way it showed up is that the top level of TidyPgm (which updates the global name cache) to be much more disciplined about those updates, since TidyPgm may itself force thunks which allocate new names. * Version numbering in interface files has changed completely, fixing one major bug with ghc --make. Previously, the version of A.f changed only if A.f's type and unfolding was textually different. That missed changes to things that A.f's unfolding mentions; which was fixed by eagerly sucking in all of those things, and listing them in the module's usage list. But that didn't work with --make, because they might have been already sucked in. Now, A.f's version changes if anything reachable from A.f (via interface files) changes. A module with unchanged source code needs recompiling only if the versions of any of its free variables changes. [This isn't quite right for dictionary functions and rules, which aren't mentioned explicitly in the source. There are extensive comments in module MkIface, where all version-handling stuff is done.] * We don't need equality on HsDecls any more (because they aren't used in interface files). Instead we have a specialised equality for IfaceSyn (eqIfDecl etc), which uses IfaceEq instead of Bool as its result type. See notes in IfaceSyn. * The horrid bit of the renamer that tried to predict what instance decls would be needed has gone entirely. Instead, the type checker simply sucks in whatever instance decls it needs, when it needs them. Easy! Similarly, no need for 'implicitModuleFVs' and 'implicitTemplateHaskellFVs' etc. Hooray! Types and type checking ~~~~~~~~~~~~~~~~~~~~~~~ * Kind-checking of types is far far tidier (new module TcHsTypes replaces the badly-named TcMonoType). Strangely, this was one of my original goals, because the kind check for types is the Right Place to do type splicing, but it just didn't fit there before. * There's a new representation for newtypes in TypeRep.lhs. Previously they were represented using "SourceTypes" which was a funny compromise. Now they have their own constructor in the Type datatype. SourceType has turned back into PredType, which is what it used to be. * Instance decl overlap checking done lazily. Consider instance C Int b instance C a Int These were rejected before as overlapping, because when seeking (C Int Int) one couldn't tell which to use. But there's no problem when seeking (C Bool Int); it can only be the second. So instead of checking for overlap when adding a new instance declaration, we check for overlap when looking up an Inst. If we find more than one matching instance, we see if any of the candidates dominates the others (in the sense of being a substitution instance of all the others); and only if not do we report an error. ------------------------ Medium things ------------------------ * The TcRn monad is generalised a bit further. It's now based on utils/IOEnv.lhs, the IO monad with an environment. The desugarer uses the monad too, so that anything it needs can get faulted in nicely. * Reduce the number of wired-in things; in particular Word and Integer are no longer wired in. The latter required HsLit.HsInteger to get a Type argument. The 'derivable type classes' data types (:+:, :*: etc) are not wired in any more either (see stuff about derivable type classes below). * The PersistentComilerState is now held in a mutable variable in the HscEnv. Previously (a) it was passed to and then returned by many top-level functions, which was painful; (b) it was invariably accompanied by the HscEnv. This change tidies up top-level plumbing without changing anything important. * Derivable type classes are treated much more like 'deriving' clauses. Previously, the Ids for the to/from functions lived inside the TyCon, but now the TyCon simply records their existence (with a simple boolean). Anyone who wants to use them must look them up in the environment. This in turn makes it easy to generate the to/from functions (done in types/Generics) using HsSyn (like TcGenDeriv for ordinary derivings) instead of CoreSyn, which in turn means that (a) we don't have to figure out all the type arguments etc; and (b) it'll be type-checked for us. Generally, the task of generating the code has become easier, which is good for Manuel, who wants to make it more sophisticated. * A Name now says what its "parent" is. For example, the parent of a data constructor is its type constructor; the parent of a class op is its class. This relationship corresponds exactly to the Avail data type; there may be other places we can exploit it. (I made the change so that version comparison in interface files would be a bit easier; but in fact it tided up other things here and there (see calls to Name.nameParent). For example, the declaration pool, of declararations read from interface files, but not yet used, is now keyed only by the 'main' name of the declaration, not the subordinate names. * New types OccEnv and OccSet, with the usual operations. OccNames can be efficiently compared, because they have uniques, thanks to the hashing implementation of FastStrings. * The GlobalRdrEnv is now keyed by OccName rather than RdrName. Not only does this halve the size of the env (because we don't need both qualified and unqualified versions in the env), but it's also more efficient because we can use a UniqFM instead of a FiniteMap. Consequential changes to Provenance, which has moved to RdrName. * External Core remains a bit of a hack, as it was before, done with a mixture of HsDecls (so that recursiveness and argument variance is still inferred), and IfaceExprs (for value declarations). It's not thoroughly tested. ------------------------ Minor things ------------------------ * DataCon fields dcWorkId, dcWrapId combined into a single field dcIds, that is explicit about whether the data con is a newtype or not. MkId.mkDataConWorkId and mkDataConWrapId are similarly combined into MkId.mkDataConIds * Choosing the boxing strategy is done for *source* type decls only, and hence is now in TcTyDecls, not DataCon. * WiredIn names are distinguished by their n_sort field, not by their location, which was rather strange * Define Maybes.mapCatMaybes :: (a -> Maybe b) -> [a] -> [b] and use it here and there * Much better pretty-printing of interface files (--show-iface) Many, many other small things. ------------------------ File changes ------------------------ * New iface/ subdirectory * Much of RnEnv has moved to iface/IfaceEnv * MkIface and BinIface have moved from main/ to iface/ * types/Variance has been absorbed into typecheck/TcTyDecls * RnHiFiles and RnIfaces have vanished entirely. Their work is done by iface/LoadIface * hsSyn/HsCore has gone, replaced by iface/IfaceSyn * typecheck/TcIfaceSig has gone, replaced by iface/TcIface * typecheck/TcMonoType has been renamed to typecheck/TcHsType * basicTypes/Var.hi-boot and basicTypes/Generics.hi-boot have gone altogether
* [project @ 2002-09-27 08:20:43 by simonpj]simonpj2002-09-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | -------------------------------- Implement recursive do-notation -------------------------------- This commit adds recursive do-notation, which Hugs has had for some time. mdo { x <- foo y ; y <- baz x ; return (y,x) } turns into do { (x,y) <- mfix (\~(x,y) -> do { x <- foo y; y <- baz x }) ; return (y,x) } This is all based on work by Levent Erkok and John Lanuchbury. The really tricky bit is in the renamer (RnExpr.rnMDoStmts) where we break things up into minimal segments. The rest is easy, including the type checker. Levent laid the groundwork, and Simon finished it off. Needless to say, I couldn't resist tidying up other stuff, so there's no guaranteed I have not broken something.
* [project @ 2002-09-13 15:02:25 by simonpj]simonpj2002-09-131-8/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | -------------------------------------- Make Template Haskell into the HEAD -------------------------------------- This massive commit transfers to the HEAD all the stuff that Simon and Tim have been doing on Template Haskell. The meta-haskell-branch is no more! WARNING: make sure that you * Update your links if you are using link trees. Some modules have been added, some have gone away. * Do 'make clean' in all library trees. The interface file format has changed, and you can get strange panics (sadly) if GHC tries to read old interface files: e.g. ghc-5.05: panic! (the `impossible' happened, GHC version 5.05): Binary.get(TyClDecl): ForeignType * You need to recompile the rts too; Linker.c has changed However the libraries are almost unaltered; just a tiny change in Base, and to the exports in Prelude. NOTE: so far as TH itself is concerned, expression splices work fine, but declaration splices are not complete. --------------- The main change --------------- The main structural change: renaming and typechecking have to be interleaved, because we can't rename stuff after a declaration splice until after we've typechecked the stuff before (and the splice itself). * Combine the renamer and typecheker monads into one (TcRnMonad, TcRnTypes) These two replace TcMonad and RnMonad * Give them a single 'driver' (TcRnDriver). This driver replaces TcModule.lhs and Rename.lhs * The haskell-src library package has a module Language/Haskell/THSyntax which defines the Haskell data type seen by the TH programmer. * New modules: hsSyn/Convert.hs converts THSyntax -> HsSyn deSugar/DsMeta.hs converts HsSyn -> THSyntax * New module typecheck/TcSplice type-checks Template Haskell splices. ------------- Linking stuff ------------- * ByteCodeLink has been split into ByteCodeLink (which links) ByteCodeAsm (which assembles) * New module ghci/ObjLink is the object-code linker. * compMan/CmLink is removed entirely (was out of place) Ditto CmTypes (which was tiny) * Linker.c initialises the linker when it is first used (no need to call initLinker any more). Template Haskell makes it harder to know when and whether to initialise the linker. ------------------------------------- Gathering the LIE in the type checker ------------------------------------- * Instead of explicitly gathering constraints in the LIE tcExpr :: RenamedExpr -> TcM (TypecheckedExpr, LIE) we now dump the constraints into a mutable varabiable carried by the monad, so we get tcExpr :: RenamedExpr -> TcM TypecheckedExpr Much less clutter in the code, and more efficient too. (Originally suggested by Mark Shields.) ----------------- Remove "SysNames" ----------------- Because the renamer and the type checker were entirely separate, we had to carry some rather tiresome implicit binders (or "SysNames") along inside some of the HsDecl data structures. They were both tiresome and fragile. Now that the typechecker and renamer are more intimately coupled, we can eliminate SysNames (well, mostly... default methods still carry something similar). ------------- Clean up HsPat ------------- One big clean up is this: instead of having two HsPat types (InPat and OutPat), they are now combined into one. This is more consistent with the way that HsExpr etc is handled; there are some 'Out' constructors for the type checker output. So: HsPat.InPat --> HsPat.Pat HsPat.OutPat --> HsPat.Pat No 'pat' type parameter in HsExpr, HsBinds, etc Constructor patterns are nicer now: they use HsPat.HsConDetails for the three cases of constructor patterns: prefix, infix, and record-bindings The *same* data type HsConDetails is used in the type declaration of the data type (HsDecls.TyData) Lots of associated clean-up operations here and there. Less code. Everything is wonderful.
* [project @ 2002-08-29 15:44:11 by simonmar]simonmar2002-08-291-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Housekeeping: - The main goal is to remove dependencies on hslibs for a bootstrapped compiler, leaving only a requirement that the packages base, haskell98 and readline are built in stage 1 in order to bootstrap. We're almost there: Posix is still required for signal handling, but all other dependencies on hslibs are now gone. Uses of Addr and ByteArray/MutableByteArray array are all gone from the compiler. PrimPacked defines the Ptr type for GHC 4.08 (which didn't have it), and it defines simple BA and MBA types to replace uses of ByteArray and MutableByteArray respectively. - Clean up import lists. HsVersions.h now defines macros for some modules which have moved between GHC versions. eg. one now imports 'GLAEXTS' to get at unboxed types and primops in the compiler. Many import lists have been sorted as per the recommendations in the new style guidelines in the commentary. I've built the compiler with GHC 4.08.2, 5.00.2, 5.02.3, 5.04 and itself, and everything still works here. Doubtless I've got something wrong, though.
* [project @ 2002-07-10 16:33:09 by sof]sof2002-07-101-11/+18
| | | | printDump,printErrs,printSDoc: flush stdout and stderr
* [project @ 2002-05-24 09:52:12 by simonpj]simonpj2002-05-241-6/+7
| | | | speakNth works for 11,12,13
* [project @ 2002-04-29 14:03:38 by simonmar]simonmar2002-04-291-15/+5
| | | | | | | | | | | | | | | | | | | | | | | | | FastString cleanup, stage 1. The FastString type is no longer a mixture of hashed strings and literal strings, it contains hashed strings only with O(1) comparison (except for UnicodeStr, but that will also go away in due course). To create a literal instance of FastString, use FSLIT(".."). By far the most common use of the old literal version of FastString was in the pattern ptext SLIT("...") this combination still works, although it doesn't go via FastString any more. The next stage will be to remove the need to use this special combination at all, using a RULE. To convert a FastString into an SDoc, now use 'ftext' instead of 'ptext'. I've also removed all the FAST_STRING related macros from HsVersions.h except for SLIT and FSLIT, just use the relevant functions from FastString instead.
* [project @ 2002-03-14 16:22:31 by simonmar]simonmar2002-03-141-16/+3
| | | | | Misc cleanup: remove the iface pretty-printing style, and clean up bits of StringBuffer that aren't required any more.
* [project @ 2001-11-19 16:34:12 by simonpj]simonpj2001-11-191-1/+1
| | | | Tidy up imports
* [project @ 2001-11-08 12:56:00 by simonmar]simonmar2001-11-081-22/+16
| | | | | | | | | | | Updates to the native code generator following the changes to fix the large block allocation bug, and changes to use the new function-address cache in the register table to reduce code size. Also: I changed the pretty-printing machinery for assembly code to use Pretty rather than Outputable, since we don't make use of the styles and it should improve performance. Perhaps the same should be done for abstract C.
* [project @ 2001-09-26 15:12:33 by simonpj]simonpj2001-09-261-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ------------------ Simon's big commit ------------------ This commit, which I don't think I can sensibly do piecemeal, consists of the things I've been doing recently, mainly directed at making Manuel, George, and Marcin happier with RULES. Reogranise the simplifier ~~~~~~~~~~~~~~~~~~~~~~~~~ 1. The simplifier's environment is now an explicit parameter. This makes it a bit easier to figure out where it is going. 2. Constructor arguments can now be arbitrary expressions, except when the application is the RHS of a let(rec). This makes it much easier to match rules like RULES "foo" f (h x, g y) = f' x y In the simplifier, it's Simplify.mkAtomicArgs that ANF-ises a constructor application where necessary. In the occurrence analyser, there's a new piece of context info (OccEncl) to say whether a constructor app is in a place where it should be in ANF. (Unless it knows this it'll give occurrence info which will inline the argument back into the constructor app.) 3. I'm experimenting with doing the "float-past big lambda" transformation in the full laziness pass, rather than mixed in with the simplifier (was tryRhsTyLam). 4. Arrange that case (coerce (S,T) (x,y)) of ... will simplify. Previous it didn't. A local change to CoreUtils.exprIsConApp_maybe. 5. Do a better job in CoreUtils.exprEtaExpandArity when there's an error function in one branch. Phase numbers, RULES, and INLINE pragmas ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1. Phase numbers decrease from N towards zero (instead of increasing). This makes it easier to add new earlier phases, which is what users want to do. 2. RULES get their own phase number, N, and are disabled in phases before N. e.g. {-# RULES "foo" [2] forall x y. f (x,y) = f' x y #-} Note the [2], which says "only active in phase 2 and later". 3. INLINE and NOINLINE pragmas have a phase number to. This is now treated in just the same way as the phase number on RULE; that is, the Id is not inlined in phases earlier than N. In phase N and later the Id *may* be inlined, and here is where INLINE and NOINLINE differ: INLNE makes the RHS look small, so as soon as it *may* be inlined it probably *will* be inlined. The syntax of the phase number on an INLINE/NOINLINE pragma has changed to be like the RULES case (i.e. in square brackets). This should also make sure you examine all such phase numbers; many will need to change now the numbering is reversed. Inlining Ids is no longer affected at all by whether the Id appears on the LHS of a rule. Now it's up to the programmer to put a suitable INLINE/NOINLINE pragma to stop it being inlined too early. Implementation notes: * A new data type, BasicTypes.Activation says when a rule or inline pragma is active. Functions isAlwaysActive, isNeverActive, isActive, do the obvious thing (all in BasicTypes). * Slight change in the SimplifierSwitch data type, which led to a lot of simplifier-specific code moving from CmdLineOpts to SimplMonad; a Good Thing. * The InlinePragma in the IdInfo of an Id is now simply an Activation saying when the Id can be inlined. (It used to be a rather bizarre pair of a Bool and a (Maybe Phase), so this is much much easier to understand.) * The simplifier has a "mode" environment switch, replacing the old black list. Unfortunately the data type decl has to be in CmdLineOpts, because it's an argument to the CoreDoSimplify switch data SimplifierMode = SimplGently | SimplPhase Int Here "gently" means "no rules, no inlining". All the crucial inlining decisions are now collected together in SimplMonad (preInlineUnconditionally, postInlineUnconditionally, activeInline, activeRule). Specialisation ~~~~~~~~~~~~~~ 1. Only dictionary *functions* are made INLINE, not dictionaries that have no parameters. (This inline-dictionary-function thing is Marcin's idea and I'm still not sure whether it's a good idea. But it's definitely a Bad Idea when there are no arguments.) 2. Be prepared to specialise an INLINE function: an easy fix in Specialise.lhs But there is still a problem, which is that the INLINE wins at the call site, so we don't use the specialised version anyway. I'm still unsure whether it makes sense to SPECIALISE something you want to INLINE. Random smaller things ~~~~~~~~~~~~~~~~~~~~~~ * builtinRules (there was only one, but may be more) in PrelRules are now incorporated. They were being ignored before... * OrdList.foldOL --> OrdList.foldrOL, OrdList.foldlOL * Some tidying up of the tidyOpenTyVar, tidyTyVar functions. I've forgotten exactly what!
* [project @ 2001-06-15 08:29:57 by simonpj]simonpj2001-06-151-0/+4
| | | | | | | | | | | | Some tidying up * Remove CmStaticInfo - GhciMode moves to HscTypes - The package stuff moves to new module main/Packages.lhs [put any package-related stuff in the new module] * Add Outputable.docToSDoc
* [project @ 2001-04-27 11:23:48 by simonmar]simonmar2001-04-271-1/+1
| | | | er.. wibble
* [project @ 2001-04-27 08:31:54 by simonmar]simonmar2001-04-271-2/+2
| | | | oops, can't use inCharRange here because of recursive dep.
* [project @ 2001-04-26 12:16:57 by simonmar]simonmar2001-04-261-3/+6
| | | | | Allow out-of-range character literals to appear in interface-file unfoldings. They occasionally pop up in Core.
* [project @ 2001-02-26 15:06:57 by simonmar]simonmar2001-02-261-1/+5
| | | | | | | | | | | | | | | | | Implement do-style bindings on the GHCi command line. The syntax for a command-line is exactly that of a do statement, with the following meanings: - `pat <- expr' performs expr, and binds each of the variables in pat. - `let pat = expr; ...' binds each of the variables in pat, doesn't do any evaluation - `expr' behaves as `it <- expr' if expr is IO-typed, or `let it = expr' followed by `print it' otherwise.
* [project @ 2000-12-11 16:42:26 by sewardj]sewardj2000-12-111-3/+0
| | | | head -> head bootability wibbles (rm disallowed OPTIONS pragmas)
* [project @ 2000-11-10 15:12:50 by simonpj]simonpj2000-11-101-47/+65
| | | | | | | | | | | | | | 1. Outputable.PprStyle now carries a bit more information In particular, the printing style tells whether to print a name in unqualified form. This used to be embedded in a Name, but since Names now outlive a single compilation unit, that's no longer appropriate. So now the print-unqualified predicate is passed in the printing style, not embedded in the Name. 2. I tidied up HscMain a little. Many of the showPass messages have migraged into the repective pass drivers
* [project @ 2000-11-08 13:51:58 by simonmar]simonmar2000-11-081-2/+5
| | | | Fixes for compiling w/ 4.08.1
* [project @ 2000-11-07 13:12:21 by simonpj]simonpj2000-11-071-2/+0
| | | | More small changes
* [project @ 2000-08-07 23:37:19 by qrczak]qrczak2000-08-071-5/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now Char, Char#, StgChar have 31 bits (physically 32). "foo"# is still an array of bytes. CharRep represents 32 bits (on a 64-bit arch too). There is also Int8Rep, used in those places where bytes were originally meant. readCharArray, indexCharOffAddr etc. still use bytes. Storable and {I,M}Array use wide Chars. In future perhaps all sized integers should be primitive types. Then some usages of indexing primops scattered through the code could be changed to then-available Int8 ones, and then Char variants of primops could be made wide (other usages that handle text should use conversion that will be provided later). I/O and _ccall_ arguments assume ISO-8859-1. UTF-8 is internally used for string literals (only). Z-encoding is ready for Unicode identifiers. Ranges of intlike and charlike closures are more easily configurable. I've probably broken nativeGen/MachCode.lhs:chrCode for Alpha but I don't know the Alpha assembler to fix it (what is zapnot?). Generally I'm not sure if I've done the NCG changes right. This commit breaks the binary compatibility (of course). TODO: * is* and to{Lower,Upper} in Char (in progress). * Libraries for text conversion (in design / experiments), to be plugged to I/O and a higher level foreign library. * PackedString. * StringBuffer and accepting source in encodings other than ISO-8859-1.
* [project @ 2000-05-25 12:41:14 by simonpj]simonpj2000-05-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ~~~~~~~~~~~~ Apr/May 2000 ~~~~~~~~~~~~ This is a pretty big commit! It adds stuff I've been working on over the last month or so. DO NOT MERGE IT WITH 4.07! Interface file formats have changed a little; you'll need to make clean before remaking. Simon PJ Recompilation checking ~~~~~~~~~~~~~~~~~~~~~~ Substantial improvement in recompilation checking. The version management is now entirely internal to GHC. ghc-iface.lprl is dead! The trick is to generate the new interface file in two steps: - first convert Types etc to HsTypes etc, and thereby build a new ParsedIface - then compare against the parsed (but not renamed) version of the old interface file Doing this meant adding code to convert *to* HsSyn things, and to compare HsSyn things for equality. That is the main tedious bit. Another improvement is that we now track version info for fixities and rules, which was missing before. Interface file reading ~~~~~~~~~~~~~~~~~~~~~~ Make interface files reading more robust. * If the old interface file is unreadable, don't fail. [bug fix] * If the old interface file mentions interfaces that are unreadable, don't fail. [bug fix] * When we can't find the interface file, print the directories we are looking in. [feature] Type signatures ~~~~~~~~~~~~~~~ * New flag -ddump-types to print type signatures Type pruning ~~~~~~~~~~~~ When importing data T = T1 A | T2 B | T3 C it seems excessive to import the types A, B, C as well, unless the constructors T1, T2 etc are used. A,B,C might be more types, and importing them may mean reading more interfaces, and so on. So the idea is that the renamer will just import the decl data T unless one of the constructors is used. This turns out to be quite easy to implement. The downside is that we must make sure the constructors are always available if they are really needed, so I regard this as an experimental feature. Elimininate ThinAir names ~~~~~~~~~~~~~~~~~~~~~~~~~ Eliminate ThinAir.lhs and all its works. It was always a hack, and now the desugarer carries around an environment I think we can nuke ThinAir altogether. As part of this, I had to move all the Prelude RdrName defns from PrelInfo to PrelMods --- so I renamed PrelMods as PrelNames. I also had to move the builtinRules so that they are injected by the renamer (rather than appearing out of the blue in SimplCore). This is if anything simpler. Miscellaneous ~~~~~~~~~~~~~ * Tidy up the data types involved in Rules * Eliminate RnEnv.better_provenance; use Name.hasBetterProv instead * Add Unique.hasKey :: Uniquable a => a -> Unique -> Bool It's useful in a lot of places * Fix a bug in interface file parsing for __U[!]
* [project @ 2000-04-03 16:46:41 by simonpj]simonpj2000-04-031-1/+1
| | | | | | | | * Minor wibble to type checker error message * Make error messages come out to stderr (I'd switched to stdout temporarily when fighting the Dreaded Stderr Bug and forgot to change back)
* [project @ 2000-04-03 09:52:28 by simonpj]simonpj2000-04-031-1/+1
| | | | | | | | | | | | | | | | | | | * Make it so that recursive newtype declarations don't send GHC into an infinite loop. newtype T = MkT T This happened because Type.repType looked throught newtypes, and that never stopped! Now TcTyDecls.mkNewTyConRep does the job more carefully, and the result is cached in the TyCon itself. * Improve the handling of type signatures & pragmas. Previously a mis-placed (say) SPECIALISE instance pragmas could be silently ignored. Both these changes involved moving quite a lot of stuff between modules.
* [project @ 2000-03-23 17:45:17 by simonpj]simonpj2000-03-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This utterly gigantic commit is what I've been up to in background mode in the last couple of months. Originally the main goal was to get rid of Con (staturated constant applications) in the CoreExpr type, but one thing led to another, and I kept postponing actually committing. Sorry. Simon, 23 March 2000 I've tested it pretty thoroughly, but doubtless things will break. Here are the highlights * Con is gone; the CoreExpr type is simpler * NoRepLits have gone * Better usage info in interface files => less recompilation * Result type signatures work * CCall primop is tidied up * Constant folding now done by Rules * Lots of hackery in the simplifier * Improvements in CPR and strictness analysis Many bug fixes including * Sergey's DoCon compiles OK; no loop in the strictness analyser * Volker Wysk's programs don't crash the CPR analyser I have not done much on measuring compilation times and binary sizes; they could have got worse. I think performance has got significantly better, though, in most cases. Removing the Con form of Core expressions ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The big thing is that For every constructor C there are now *two* Ids: C is the constructor's *wrapper*. It evaluates and unboxes arguments before calling $wC. It has a perfectly ordinary top-level defn in the module defining the data type. $wC is the constructor's *worker*. It is like a primop that simply allocates and builds the constructor value. Its arguments are the actual representation arguments of the constructor. Its type may be different to C, because: - useless dict args are dropped - strict args may be flattened For every primop P there is *one* Id, its (curried) Id Neither contructor worker Id nor the primop Id have a defminition anywhere. Instead they are saturated during the core-to-STG pass, and the code generator generates code for them directly. The STG language still has saturated primops and constructor applications. * The Const type disappears, along with Const.lhs. The literal part of Const.lhs reappears as Literal.lhs. Much tidying up in here, to bring all the range checking into this one module. * I got rid of NoRep literals entirely. They just seem to be too much trouble. * Because Con's don't exist any more, the funny C { args } syntax disappears from inteface files. Parsing ~~~~~~~ * Result type signatures now work f :: Int -> Int = \x -> x -- The Int->Int is the type of f g x y :: Int = x+y -- The Int is the type of the result of (g x y) Recompilation checking and make ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * The .hi file for a modules is not touched if it doesn't change. (It used to be touched regardless, forcing a chain of recompilations.) The penalty for this is that we record exported things just as if they were mentioned in the body of the module. And the penalty for that is that we may recompile a module when the only things that have changed are the things it is passing on without using. But it seems like a good trade. * -recomp is on by default Foreign declarations ~~~~~~~~~~~~~~~~~~~~ * If you say foreign export zoo :: Int -> IO Int then you get a C produre called 'zoo', not 'zzoo' as before. I've also added a check that complains if you export (or import) a C procedure whose name isn't legal C. Code generation and labels ~~~~~~~~~~~~~~~~~~~~~~~~~~ * Now that constructor workers and wrappers have distinct names, there's no need to have a Foo_static_closure and a Foo_closure for constructor Foo. I nuked the entire StaticClosure story. This has effects in some of the RTS headers (i.e. s/static_closure/closure/g) Rules, constant folding ~~~~~~~~~~~~~~~~~~~~~~~ * Constant folding becomes just another rewrite rule, attached to the Id for the PrimOp. To achieve this, there's a new form of Rule, a BuiltinRule (see CoreSyn.lhs). The prelude rules are in prelude/PrelRules.lhs, while simplCore/ConFold.lhs has gone. * Appending of constant strings now works, using fold/build fusion, plus the rewrite rule unpack "foo" c (unpack "baz" c n) = unpack "foobaz" c n Implemented in PrelRules.lhs * The CCall primop is tidied up quite a bit. There is now a data type CCall, defined in PrimOp, that packages up the info needed for a particular CCall. There is a new Id for each new ccall, with an big "occurrence name" {__ccall "foo" gc Int# -> Int#} In interface files, this is parsed as a single Id, which is what it is, really. Miscellaneous ~~~~~~~~~~~~~ * There were numerous places where the host compiler's minInt/maxInt was being used as the target machine's minInt/maxInt. I nuked all of these; everything is localised to inIntRange and inWordRange, in Literal.lhs * Desugaring record updates was broken: it didn't generate correct matches when used withe records with fancy unboxing etc. It now uses matchWrapper. * Significant tidying up in codeGen/SMRep.lhs * Add __word, __word64, __int64 terminals to signal the obvious types in interface files. Add the ability to print word values in hex into C code. * PrimOp.lhs is no longer part of a loop. Remove PrimOp.hi-boot* Types ~~~~~ * isProductTyCon no longer returns False for recursive products, nor for unboxed products; you have to test for these separately. There's no reason not to do CPR for recursive product types, for example. Ditto splitProductType_maybe. Simplification ~~~~~~~~~~~~~~~ * New -fno-case-of-case flag for the simplifier. We use this in the first run of the simplifier, where it helps to stop messing up expressions that the (subsequent) full laziness pass would otherwise find float out. It's much more effective than previous half-baked hacks in inlining. Actually, it turned out that there were three places in Simplify.lhs that needed to know use this flag. * Make the float-in pass push duplicatable bindings into the branches of a case expression, in the hope that we never have to allocate them. (see FloatIn.sepBindsByDropPoint) * Arrange that top-level bottoming Ids get a NOINLINE pragma This reduced gratuitous inlining of error messages. But arrange that such things still get w/w'd. * Arrange that a strict argument position is regarded as an 'interesting' context, so that if we see foldr k z (g x) then we'll be inclined to inline g; this can expose a build. * There was a missing case in CoreUtils.exprEtaExpandArity that meant we were missing some obvious cases for eta expansion Also improve the code when handling applications. * Make record selectors (identifiable by their IdFlavour) into "cheap" operations. [The change is a 2-liner in CoreUtils.exprIsCheap] This means that record selection may be inlined into function bodies, which greatly improves the arities of overloaded functions. * Make a cleaner job of inlining "lone variables". There was some distributed cunning, but I've centralised it all now in SimplUtils.analyseCont, which analyses the context of a call to decide whether it is "interesting". * Don't specialise very small functions in Specialise.specDefn It's better to inline it. Rather like the worker/wrapper case. * Be just a little more aggressive when floating out of let rhss. See comments with Simplify.wantToExpose A small change with an occasional big effect. * Make the inline-size computation think that case x of I# x -> ... is *free*. CPR analysis ~~~~~~~~~~~~ * Fix what was essentially a bug in CPR analysis. Consider letrec f x = let g y = let ... in f e1 in if ... then (a,b) else g x g has the CPR property if f does; so when generating the final annotated RHS for f, we must use an envt in which f is bound to its final abstract value. This wasn't happening. Instead, f was given the CPR tag but g wasn't; but of course the w/w pass gives rotten results in that case!! (Because f's CPR-ness relied on g's.) On they way I tidied up the code in CprAnalyse. It's quite a bit shorter. The fact that some data constructors return a constructed product shows up in their CPR info (MkId.mkDataConId) not in CprAnalyse.lhs Strictness analysis and worker/wrapper ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * BIG THING: pass in the demand to StrictAnal.saExpr. This affects situations like f (let x = e1 in (x,x)) where f turns out to have strictness u(SS), say. In this case we can mark x as demanded, and use a case expression for it. The situation before is that we didn't "know" that there is the u(SS) demand on the argument, so we simply computed that the body of the let expression is lazy in x, and marked x as lazily-demanded. Then even after f was w/w'd we got let x = e1 in case (x,x) of (a,b) -> $wf a b and hence let x = e1 in $wf a b I found a much more complicated situation in spectral/sphere/Main.shade, which improved quite a bit with this change. * Moved the StrictnessInfo type from IdInfo to Demand. It's the logical place for it, and helps avoid module loops * Do worker/wrapper for coerces even if the arity is zero. Thus: stdout = coerce Handle (..blurg..) ==> wibble = (...blurg...) stdout = coerce Handle wibble This is good because I found places where we were saying case coerce t stdout of { MVar a -> ... case coerce t stdout of { MVar b -> ... and the redundant case wasn't getting eliminated because of the coerce.
* [project @ 2000-03-02 22:51:30 by lewie]lewie2000-03-021-0/+8
| | | | | | | Further refine and fix how `with' partitions the LIE. Also moved the partitioning function from Inst to TcSimplify. Fixed layout bug with `with'. Fixed another wibble w/ importing defs w/ implicit params. Make 4-tuples outputable (a convenience in debugging measure).
* [project @ 2000-02-11 13:06:39 by simonpj]simonpj2000-02-111-10/+25
| | | | Add a few functions to Outputable
* [project @ 1999-12-06 10:50:29 by simonpj]simonpj1999-12-061-1/+5
| | | | | | | | | | | | | Change printDump so that it prints in user style by default. This means that (eg) -ddump-simpl output is much more readable... but you may get confused by variables that look the same but aren't. To recover the previous behaviour use -dppr-debug This change only affects compiler hackers; let me know if it has any good or bad effects. Simon
* [project @ 1999-10-13 16:39:10 by simonmar]simonmar1999-10-131-1/+4
| | | | | | | Crude allocation-counting extension to ticky-ticky profiling. Allocations are counted against the closest lexically enclosing function closure, so you need to map the output back to the STG code.
* [project @ 1999-05-18 15:03:54 by simonpj]simonpj1999-05-181-1/+1
| | | | RULES-NOTES
* [project @ 1999-03-24 18:19:08 by sof]sof1999-03-241-11/+8
| | | | tidied up the error handling defs.
* [project @ 1999-02-10 16:01:17 by simonpj]simonpj1999-02-101-1/+1
| | | | Tiny error-message hacks
* [project @ 1999-01-27 14:51:14 by simonpj]simonpj1999-01-271-3/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Finally! This commits the ongoing saga of Simon's hygiene sweep FUNCTIONALITY ~~~~~~~~~~~~~ a) The 'unused variable' warnings from the renamer work. b) Better error messages here and there, esp type checker c) Fixities for Haskell 98 (maybe I'd done that before) d) Lazy reporting of name clashes for Haskell 98 (ditto) HYGIENE ~~~~~~~ a) type OccName has its own module. OccNames are represented by a single FastString, not three as in the last round. This string is held in Z-encoded form; a decoding function decodes for printing in user error messages. There's a nice tight encoding for (,,,,,,,,,,,,,,,,,,,,,,,,,,,,,) b) type Module is a proper ADT, in module OccName c) type RdrName is a proper ADT, in its own module d) type Name has a new, somwhat tidier, representation e) much grunting in the renamer to get Provenances right. This makes error messages look better (no spurious qualifiers)
* [project @ 1999-01-07 17:49:47 by kw217]kw2171999-01-071-1/+1
| | | | Add missing export of warnPprTrace (for WARN macro).
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