Changeset 6ccfb7f for src/ResolvExpr/AlternativeFinder.cc

Timestamp:

Aug 25, 2017, 1:51:22 PM (7 years ago)

Author:

Rob Schluntz <rschlunt@…>

Branches:

ADT, aaron-thesis, arm-eh, ast-experimental, cleanup-dtors, deferred_resn, demangler, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, new-env, no_list, persistent-indexer, pthread-emulation, qualifiedEnum, resolv-new, with_gc

Children:

62a05d1

Parents:

07516b56

git-author:

Rob Schluntz <rschlunt@…> (08/25/17 13:51:12)

git-committer:

Rob Schluntz <rschlunt@…> (08/25/17 13:51:22)

Message:

Unconditionally attempt to resolve function operators with function alternative [fixes #23]

File:

• src/ResolvExpr/AlternativeFinder.cc (modified) (4 diffs)

src/ResolvExpr/AlternativeFinder.cc

@@ -698 +698 @@
 
         void AlternativeFinder::visit( UntypedExpr *untypedExpr ) {
-                bool doneInit = false;
-                AlternativeFinder funcOpFinder( indexer, env );
-
-                AlternativeFinder funcFinder( indexer, env );
-
                 {
                         std::string fname = InitTweak::getFunctionName( untypedExpr );
@@ -715 +710 @@
                 }
 
+                AlternativeFinder funcFinder( indexer, env );
                 funcFinder.findWithAdjustment( untypedExpr->get_function() );
+                // if there are no function alternatives, then proceeding is a waste of time.
+                if ( funcFinder.alternatives.empty() ) return;
+
                 std::list< AlternativeFinder > argAlternatives;
                 findSubExprs( untypedExpr->begin_args(), untypedExpr->end_args(), back_inserter( argAlternatives ) );
@@ -725 +724 @@
                 // if not tuple assignment, assignment is taken care of as a normal function call
                 Tuples::handleTupleAssignment( *this, untypedExpr, possibilities );
+
+                // find function operators
+                AlternativeFinder funcOpFinder( indexer, env );
+                NameExpr *opExpr = new NameExpr( "?()" );
+                try {
+                        funcOpFinder.findWithAdjustment( opExpr );
+                } catch( SemanticError &e ) {
+                        // it's ok if there aren't any defined function ops
+                }
+                PRINT(
+                        std::cerr << "known function ops:" << std::endl;
+                        printAlts( funcOpFinder.alternatives, std::cerr, 8 );
+                )
 
                 AltList candidates;
@@ -754 +766 @@
                                                 } // if
                                         } // if
-                                } else {
-                                        // seek a function operator that's compatible
-                                        if ( ! doneInit ) {
-                                                doneInit = true;
-                                                NameExpr *opExpr = new NameExpr( "?()" );
-                                                try {
-                                                        funcOpFinder.findWithAdjustment( opExpr );
-                                                } catch( SemanticError &e ) {
-                                                        // it's ok if there aren't any defined function ops
-                                                }
-                                                PRINT(
-                                                        std::cerr << "known function ops:" << std::endl;
-                                                        printAlts( funcOpFinder.alternatives, std::cerr, 8 );
-                                                )
-                                        }
-
-                                        for ( AltList::iterator funcOp = funcOpFinder.alternatives.begin(); funcOp != funcOpFinder.alternatives.end(); ++funcOp ) {
-                                                // check if the type is pointer to function
-                                                if ( PointerType *pointer = dynamic_cast< PointerType* >( funcOp->expr->get_result()->stripReferences() ) ) {
-                                                        if ( FunctionType *function = dynamic_cast< FunctionType* >( pointer->get_base() ) ) {
-                                                                referenceToRvalueConversion( funcOp->expr );
-                                                                for ( std::list< AltList >::iterator actualAlt = possibilities.begin(); actualAlt != possibilities.end(); ++actualAlt ) {
-                                                                        AltList currentAlt;
-                                                                        currentAlt.push_back( *func );
-                                                                        currentAlt.insert( currentAlt.end(), actualAlt->begin(), actualAlt->end() );
-                                                                        makeFunctionAlternatives( *funcOp, function, currentAlt, std::back_inserter( candidates ) );
-                                                                } // for
-                                                        } // if
+                                }
+
+                                // try each function operator ?() with the current function alternative and each of the argument combinations
+                                for ( AltList::iterator funcOp = funcOpFinder.alternatives.begin(); funcOp != funcOpFinder.alternatives.end(); ++funcOp ) {
+                                        // check if the type is pointer to function
+                                        if ( PointerType *pointer = dynamic_cast< PointerType* >( funcOp->expr->get_result()->stripReferences() ) ) {
+                                                if ( FunctionType *function = dynamic_cast< FunctionType* >( pointer->get_base() ) ) {
+                                                        referenceToRvalueConversion( funcOp->expr );
+                                                        for ( std::list< AltList >::iterator actualAlt = possibilities.begin(); actualAlt != possibilities.end(); ++actualAlt ) {
+                                                                AltList currentAlt;
+                                                                currentAlt.push_back( *func );
+                                                                currentAlt.insert( currentAlt.end(), actualAlt->begin(), actualAlt->end() );
+                                                                makeFunctionAlternatives( *funcOp, function, currentAlt, std::back_inserter( candidates ) );
+                                                        } // for
                                                 } // if
-                                        } // for
-                                } // if
+                                        } // if
+                                } // for
                         } catch ( SemanticError &e ) {
                                 errors.append( e );