Changeset 8d182b1 for src/Tuples/Explode.h

Timestamp:

Nov 14, 2023, 12:19:09 PM (23 months ago)

Author:

caparson <caparson@…>

Branches:

master

Children:

1ccae59, 89a8bab

Parents:

df8ba61a (diff), 5625427 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge branch 'master' of plg.uwaterloo.ca:software/cfa/cfa-cc

File:

• src/Tuples/Explode.h (modified) (2 diffs)

src/Tuples/Explode.h

@@ -20 +20 @@
 
 #include "AST/Expr.hpp"
-#include "ResolvExpr/Alternative.h"     // for Alternative, AltList
 #include "ResolvExpr/Candidate.hpp"     // for Candidate, CandidateList
-#include "ResolvExpr/ExplodedActual.h"  // for ExplodedActual
 #include "ResolvExpr/ExplodedArg.hpp"   // for ExplodedArg
-#include "SynTree/Expression.h"         // for Expression, UniqueExpr, AddressExpr
-#include "SynTree/Type.h"               // for TupleType, Type
 #include "Tuples.h"                     // for maybeImpure
 
@@ -32 +28 @@
 }
 
-namespace SymTab {
-class Indexer;
-}  // namespace SymTab
-
 namespace Tuples {
-        Expression * distributeReference( Expression * );
-
-        static inline CastExpr * isReferenceCast( Expression * expr ) {
-                if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) {
-                        if ( dynamic_cast< ReferenceType * >( castExpr->result ) ) {
-                                return castExpr;
-                        }
-                }
-                return nullptr;
-        }
-
-        /// Append alternative to an OutputIterator of Alternatives
-        template<typename OutputIterator>
-        void append( OutputIterator out, Expression* expr, const ResolvExpr::TypeEnvironment& env,
-                        const ResolvExpr::OpenVarSet& openVars, const ResolvExpr::AssertionList& need,
-                        const ResolvExpr::Cost& cost, const ResolvExpr::Cost& cvtCost ) {
-                *out++ = ResolvExpr::Alternative{ expr, env, openVars, need, cost, cvtCost };
-        }
-
-        /// Append alternative to an ExplodedActual
-        static inline void append( ResolvExpr::ExplodedActual& ea, Expression* expr,
-                        const ResolvExpr::TypeEnvironment&, const ResolvExpr::OpenVarSet&,
-                        const ResolvExpr::AssertionList&, const ResolvExpr::Cost&, const ResolvExpr::Cost& ) {
-                ea.exprs.emplace_back( expr );
-                /// xxx -- merge environment, openVars, need, cost?
-        }
-
-        /// helper function used by explode
-        template< typename Output >
-        void explodeUnique( Expression * expr, const ResolvExpr::Alternative & alt,
-                        const SymTab::Indexer & indexer, Output&& out, bool isTupleAssign ) {
-                if ( isTupleAssign ) {
-                        // tuple assignment needs CastExprs to be recursively exploded to easily get at all of the components
-                        if ( CastExpr * castExpr = isReferenceCast( expr ) ) {
-                                ResolvExpr::AltList alts;
-                                explodeUnique(
-                                        castExpr->get_arg(), alt, indexer, back_inserter( alts ), isTupleAssign );
-                                for ( ResolvExpr::Alternative & alt : alts ) {
-                                        // distribute reference cast over all components
-                                        append( std::forward<Output>(out), distributeReference( alt.release_expr() ),
-                                                alt.env, alt.openVars, alt.need, alt.cost, alt.cvtCost );
-                                }
-                                // in tuple assignment, still need to handle the other cases, but only if not already handled here (don't want to output too many alternatives)
-                                return;
-                        }
-                }
-                Type * res = expr->get_result()->stripReferences();
-                if ( TupleType * tupleType = dynamic_cast< TupleType * > ( res ) ) {
-                        if ( TupleExpr * tupleExpr = dynamic_cast< TupleExpr * >( expr ) ) {
-                                // can open tuple expr and dump its exploded components
-                                for ( Expression * expr : tupleExpr->get_exprs() ) {
-                                        explodeUnique( expr, alt, indexer, std::forward<Output>(out), isTupleAssign );
-                                }
-                        } else {
-                                // tuple type, but not tuple expr - recursively index into its components.
-                                // if expr type is reference, convert to value type
-                                Expression * arg = expr->clone();
-                                if ( Tuples::maybeImpureIgnoreUnique( arg ) ) {
-                                        // expressions which may contain side effects require a single unique instance of the expression.
-                                        arg = new UniqueExpr( arg );
-                                }
-                                // cast reference to value type to facilitate further explosion
-                                if ( dynamic_cast<ReferenceType *>( arg->get_result() ) ) {
-                                        arg = new CastExpr( arg, tupleType->clone() );
-                                }
-                                for ( unsigned int i = 0; i < tupleType->size(); i++ ) {
-                                        TupleIndexExpr * idx = new TupleIndexExpr( arg->clone(), i );
-                                        explodeUnique( idx, alt, indexer, std::forward<Output>(out), isTupleAssign );
-                                        delete idx;
-                                }
-                                delete arg;
-                        }
-                } else {
-                        // atomic (non-tuple) type - output a clone of the expression in a new alternative
-                        append( std::forward<Output>(out), expr->clone(), alt.env, alt.openVars, alt.need,
-                                alt.cost, alt.cvtCost );
-                }
-        }
-
-        /// expands a tuple-valued alternative into multiple alternatives, each with a non-tuple-type
-        template< typename Output >
-        void explode( const ResolvExpr::Alternative &alt, const SymTab::Indexer & indexer,
-                        Output&& out, bool isTupleAssign = false ) {
-                explodeUnique( alt.expr, alt, indexer, std::forward<Output>(out), isTupleAssign );
-        }
-
-        // explode list of alternatives
-        template< typename AltIterator, typename Output >
-        void explode( AltIterator altBegin, AltIterator altEnd, const SymTab::Indexer & indexer,
-                        Output&& out, bool isTupleAssign = false ) {
-                for ( ; altBegin != altEnd; ++altBegin ) {
-                        explode( *altBegin, indexer, std::forward<Output>(out), isTupleAssign );
-                }
-        }
-
-        template< typename Output >
-        void explode( const ResolvExpr::AltList & alts, const SymTab::Indexer & indexer, Output&& out,
-                        bool isTupleAssign = false ) {
-                explode( alts.begin(), alts.end(), indexer, std::forward<Output>(out), isTupleAssign );
-        }
 
 const ast::Expr * distributeReference( const ast::Expr * );