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#include "builtins/builtins.h"
using namespace goose;
using namespace goose::ir;
using namespace goose::llr;
namespace goose::builtins
{
void SetupReferenceUnification( Env& e )
void SetupReferenceTypeChecking( Env& e )
{
auto localVarPattern = GetValueType< LocalVar >( ANYTERM( _ ) );
auto refTypePattern = ValueToIRExpr(
Value( GetValueType< ReferenceType >(), TVEC( TSID( reference ), ANYTERM( _ ), ANYTERM( _ ) ) ) );
auto refTypePatternConstant = ValueToIRExpr(
Value( GetValueType< ReferenceType >(), TVEC( TSID( reference ), TSID( const ), ANYTERM( _ ) ) ) );
auto refTypePatternMutable = ValueToIRExpr(
Value( GetValueType< ReferenceType >(), TVEC( TSID( reference ), TSID( mut ), ANYTERM( _ ) ) ) );
auto refTypePatternTemporary = ValueToIRExpr(
Value( GetValueType< ReferenceType >(), TVEC( TSID( reference ), TSID( temporary ), ANYTERM( _ ) ) ) );
// Reference unification rule.
e.unificationRuleSet()->addSymRule( URINFOS,
e.typeCheckingRuleSet()->addTypeCheckingRule( TCRINFOS,
ParamPat( refTypePattern ),
ValueToIRExpr( ValuePattern(
ANYTERM( _ ),
refTypePattern,
ANYTERM( _ ) ) ),
[]( const Term& lhs, const Term& rhs, const UnificationContext& uc ) -> UniGen
[]( const Term& lhs, const Term& rhs, const TypeCheckingContext& tcc ) -> TCGen
{
auto lRefType = *FromValue< ReferenceType >( *ValueFromIRExpr( ValuePatternFromIRExpr( lhs )->type() ) );
auto rhsVal = *ValueFromIRExpr( rhs );
auto rRefType = *FromValue< ReferenceType >( *ValueFromIRExpr( rhsVal.type() ) );
// Unify the behaviors
for( auto&& [b, uc] : Unify( lRefType.behavior(), rRefType.behavior(), uc ) )
for( auto&& [b, tcc] : Unify( lRefType.behavior(), rRefType.behavior(), tcc ) )
{
// Unify the types
for( auto&& [t, uc] : Unify( lRefType.type(), rRefType.type(), uc ) )
for( auto&& [t, tcc] : Unify( lRefType.type(), rRefType.type(), tcc ) )
{
co_yield { ValueToIRExpr( Value( ValueToIRExpr( ToValue( ReferenceType( t, b ) ) ),
rhsVal.llr() ) ), uc };
rhsVal.llr() ) ), tcc };
}
}
}
);
// mut -> const reference unification rule.
e.unificationRuleSet()->addAsymRule( URINFOS,
e.typeCheckingRuleSet()->addUnificationRule( TCRINFOS,
TSID( const ),
TSID( mut ),
[]( const Term& lhs, const Term& rhs, const UnificationContext& uc ) -> UniGen
[]( const Term& lhs, const Term& rhs, const TypeCheckingContext& tcc ) -> TCGen
{
co_yield { TSID( const ), uc };
co_yield { TSID( const ), tcc };
}
);
// temp -> const reference unification rule.
e.unificationRuleSet()->addAsymRule( URINFOS,
e.typeCheckingRuleSet()->addUnificationRule( TCRINFOS,
TSID( const ),
TSID( temp ),
[]( const Term& lhs, const Term& rhs, const UnificationContext& uc ) -> UniGen
[]( const Term& lhs, const Term& rhs, const TypeCheckingContext& tcc ) -> TCGen
{
co_yield { TSID( const ), uc };
co_yield { TSID( const ), tcc };
}
);
// temp -> mut reference unification rule.
e.unificationRuleSet()->addAsymRule( URINFOS,
e.typeCheckingRuleSet()->addUnificationRule( TCRINFOS,
TSID( mut ),
TSID( temp ),
[]( const Term& lhs, const Term& rhs, const UnificationContext& uc ) -> UniGen
[]( const Term& lhs, const Term& rhs, const TypeCheckingContext& tcc ) -> TCGen
{
co_yield { TSID( mut ), uc };
co_yield { TSID( mut ), tcc };
}
);
// Reference unification against a param (implicit dereferencing):
// Unify the referenced value with the param.
e.unificationRuleSet()->addSymRule( URINFOS,
e.typeCheckingRuleSet()->addTypeCheckingRule( TCRINFOS,
ParamPat( ANYTERM( _ ) ),
ValueToIRExpr( ValuePattern(
ANYTERM( _ ),
refTypePattern,
ANYTERM( _ ) ) ),
[]( const Term& lhs, const Term& rhs, const UnificationContext& uc ) -> UniGen
[]( const Term& lhs, const Term& rhs, const TypeCheckingContext& tcc ) -> TCGen
{
auto refval = *ValueFromIRExpr( rhs );
auto ref = FromValue< Reference >( refval );
if( !ref )
co_return;
auto content = ValueToIRExpr( BuildComputedValue( ref->type().type(),
llr::Load( ref->address(), ref->type().type() ) )
.setLocationId( refval.locationId() ) );
// Unify the param with the ref's content
co_yield Unify( lhs, content, uc );
// TypeCheck the param with the ref's content
co_yield TypeCheck( lhs, content, tcc );
} );
// LocalVar unification against a param (implicit referencing):
// Build a mutable ref value.
e.unificationRuleSet()->addSymRule( URINFOS,
e.typeCheckingRuleSet()->addTypeCheckingRule( TCRINFOS,
ParamPat( ANYTERM( _ ) ),
ValueToIRExpr( ValuePattern(
ANYTERM( _ ),
localVarPattern,
ANYTERM( _ ) ) ),
[]( const Term& lhs, const Term& rhs, const UnificationContext& uc ) -> UniGen
[]( const Term& lhs, const Term& rhs, const TypeCheckingContext& tcc ) -> TCGen
{
auto ltype = ValuePatternFromIRExpr( lhs )->type();
auto lvval = *ValueFromIRExpr( rhs );
auto locvar = FromValue< LocalVar >( lvval );
if( !locvar )
co_return;
ReferenceType rt( locvar->type(), TSID( mut ) );
auto ref = ValueToIRExpr( BuildComputedValue( ValueToIRExpr( ToValue( rt ) ),
Load( VarAddress( locvar->index() ), rt.type() ) )
.setLocationId( lvval.locationId() ) );
co_yield Unify( lhs, ref, uc );
co_yield TypeCheck( lhs, ref, tcc );
} );
// Implicit referencing of non-variables: build a tempref
e.unificationRuleSet()->addSymRule( URINFOS,
e.typeCheckingRuleSet()->addTypeCheckingRule( TCRINFOS,
ParamPat( refTypePattern ),
ValueToIRExpr( ValuePattern(
ANYTERM( _ ),
ANYTERM( _ ),
ANYTERM( _ ) ) ),
[]( const Term& lhs, const Term& rhs, const UnificationContext& uc ) -> UniGen
[]( const Term& lhs, const Term& rhs, const TypeCheckingContext& tcc ) -> TCGen
{
auto rval = *ValueFromIRExpr( rhs );
ReferenceType rt( rval.type(), TSID( temp ) );
auto tempIndex = uc.context().codeBuilder()->cfg()->getNewTemporaryIndex();
auto tempIndex = tcc.context().codeBuilder()->cfg()->getNewTemporaryIndex();
auto ref = ValueToIRExpr( BuildComputedValue( ValueToIRExpr( ToValue( rt ) ),
Load( TemporaryAddress( tempIndex, rval ), rt.type() ) )
.setLocationId( rval.locationId() ) );
// Unify the param with the ref
co_yield Unify( lhs, ref, uc );
// TypeCheck the param with the ref
co_yield TypeCheck( lhs, ref, tcc );
} );
}
}
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