#include "HsVersions.h"
-import HsSyn ( RuleDecl(..), RuleBndr(..) )
+import HsSyn ( RuleDecl(..), RuleBndr(..), collectRuleBndrSigTys )
import CoreSyn ( CoreRule(..) )
import RnHsSyn ( RenamedRuleDecl )
-import HscTypes ( PackageRuleBase )
import TcHsSyn ( TypecheckedRuleDecl, mkHsLet )
import TcMonad
import TcSimplify ( tcSimplifyToDicts, tcSimplifyInferCheck )
-import TcType ( newTyVarTy )
+import TcMType ( newTyVarTy )
+import TcType ( tyVarsOfTypes, openTypeKind )
import TcIfaceSig ( tcCoreExpr, tcCoreLamBndrs, tcVar )
-import TcMonoType ( kcHsSigTypes, tcHsSigType, tcScopedTyVars, checkSigTyVars )
-import TcExpr ( tcExpr )
-import TcEnv ( tcExtendLocalValEnv, tcExtendTyVarEnv, isLocalThing )
-import Rules ( extendRuleBase )
-import Inst ( LIE, plusLIEs, instToId )
-import Id ( idName, idType, mkLocalId )
-import Module ( Module )
-import VarSet
-import Type ( tyVarsOfTypes, openTypeKind )
-import List ( partition )
+import TcMonoType ( tcHsSigType, UserTypeCtxt(..), tcAddScopedTyVars )
+import TcExpr ( tcMonoExpr )
+import TcEnv ( tcExtendLocalValEnv, tcLookupId )
+import Inst ( LIE, plusLIEs, emptyLIE, instToId )
+import Id ( idType, mkLocalId )
import Outputable
\end{code}
\begin{code}
-tcIfaceRules :: PackageRuleBase -> Module -> [RenamedRuleDecl]
- -> TcM (PackageRuleBase, [TypecheckedRuleDecl])
-tcIfaceRules pkg_rule_base mod decls
- = mapTc tcIfaceRule decls `thenTc` \ new_rules ->
- let
- (local_rules, imported_rules) = partition is_local new_rules
- new_rule_base = foldl add pkg_rule_base imported_rules
- in
- returnTc (new_rule_base, local_rules)
- where
- add rule_base (IfaceRuleOut id rule) = extendRuleBase rule_base (id, rule)
-
- -- When relinking this module from its interface-file decls
- -- we'll have IfaceRules that are in fact local to this module
- is_local (IfaceRuleOut n _) = isLocalThing mod n
- is_local other = True
+tcIfaceRules :: [RenamedRuleDecl] -> TcM [TypecheckedRuleDecl]
+tcIfaceRules decls = mapTc tcIfaceRule decls
tcIfaceRule :: RenamedRuleDecl -> TcM TypecheckedRuleDecl
-- No zonking necessary!
-tcIfaceRule rule@(IfaceRule name vars fun args rhs src_loc)
+tcIfaceRule (IfaceRule name act vars fun args rhs src_loc)
= tcAddSrcLoc src_loc $
tcAddErrCtxt (ruleCtxt name) $
tcVar fun `thenTc` \ fun' ->
tcCoreLamBndrs vars $ \ vars' ->
mapTc tcCoreExpr args `thenTc` \ args' ->
tcCoreExpr rhs `thenTc` \ rhs' ->
- let
- new_rule :: TypecheckedRuleDecl
- new_rule = IfaceRuleOut fun' (Rule name vars' args' rhs')
- in
- returnTc new_rule
+ returnTc (IfaceRuleOut fun' (Rule name act vars' args' rhs'))
+
+tcIfaceRule (IfaceRuleOut fun rule) -- Built-in rules come this way
+ = tcVar fun `thenTc` \ fun' ->
+ returnTc (IfaceRuleOut fun' rule)
tcSourceRules :: [RenamedRuleDecl] -> TcM (LIE, [TypecheckedRuleDecl])
tcSourceRules decls
= mapAndUnzipTc tcSourceRule decls `thenTc` \ (lies, decls') ->
returnTc (plusLIEs lies, decls')
-tcSourceRule (HsRule name sig_tvs vars lhs rhs src_loc)
+tcSourceRule (IfaceRuleOut fun rule) -- Built-in rules come this way
+ -- if they are from the module being compiled
+ = tcLookupId fun `thenTc` \ fun' ->
+ returnTc (emptyLIE, IfaceRuleOut fun' rule)
+
+tcSourceRule (HsRule name act vars lhs rhs src_loc)
= tcAddSrcLoc src_loc $
tcAddErrCtxt (ruleCtxt name) $
newTyVarTy openTypeKind `thenNF_Tc` \ rule_ty ->
-- Deal with the tyvars mentioned in signatures
- tcScopedTyVars sig_tvs (kcHsSigTypes sig_tys) (
+ tcAddScopedTyVars (collectRuleBndrSigTys vars) (
-- Ditto forall'd variables
- mapNF_Tc new_id vars `thenNF_Tc` \ ids ->
- tcExtendLocalValEnv [(idName id, id) | id <- ids] $
+ mapNF_Tc new_id vars `thenNF_Tc` \ ids ->
+ tcExtendLocalValEnv ids $
-- Now LHS and RHS
- tcExpr lhs rule_ty `thenTc` \ (lhs', lhs_lie) ->
- tcExpr rhs rule_ty `thenTc` \ (rhs', rhs_lie) ->
+ tcMonoExpr lhs rule_ty `thenTc` \ (lhs', lhs_lie) ->
+ tcMonoExpr rhs rule_ty `thenTc` \ (rhs', rhs_lie) ->
returnTc (ids, lhs', rhs', lhs_lie, rhs_lie)
) `thenTc` \ (ids, lhs', rhs', lhs_lie, rhs_lie) ->
-- in the LHS, but not in the type of the lhs, nor in the binders.
-- They'll get zapped to (), but that's over-constraining really.
-- Let's see if we get a problem.
- forall_tvs = varSetElems (tyVarsOfTypes (rule_ty : map idType tpl_ids))
+ forall_tvs = tyVarsOfTypes (rule_ty : map idType tpl_ids)
in
-- RHS can be a bit more lenient. In particular,
forall_tvs
lhs_dicts rhs_lie `thenTc` \ (forall_tvs1, lie', rhs_binds) ->
- returnTc (lie', HsRule name forall_tvs1
- (map RuleBndr tpl_ids) -- yuk
+ returnTc (lie', HsRule name act
+ (map RuleBndr (forall_tvs1 ++ tpl_ids)) -- yuk
(mkHsLet lhs_binds lhs')
(mkHsLet rhs_binds rhs')
src_loc)
where
- sig_tys = [t | RuleBndrSig _ t <- vars]
-
- new_id (RuleBndr var) = newTyVarTy openTypeKind `thenNF_Tc` \ ty ->
+ new_id (RuleBndr var) = newTyVarTy openTypeKind `thenNF_Tc` \ ty ->
returnNF_Tc (mkLocalId var ty)
- new_id (RuleBndrSig var rn_ty) = tcHsSigType rn_ty `thenTc` \ ty ->
+ new_id (RuleBndrSig var rn_ty) = tcHsSigType (RuleSigCtxt var) rn_ty `thenTc` \ ty ->
returnNF_Tc (mkLocalId var ty)
ruleCtxt name = ptext SLIT("When checking the transformation rule") <+>