kicad-source/pcbnew/pcbexpr_evaluator.cpp

785 lines
24 KiB
C++

/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright The KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "pcbexpr_evaluator.h"
#include <cstdio>
#include <memory>
#include <mutex>
#include <board.h>
#include <footprint.h>
#include <lset.h>
#include <board_connected_item.h>
#include <drc/drc_engine.h>
#include <component_classes/component_class.h>
#include <string_utils.h>
/* --------------------------------------------------------------------------------------------
* Specialized Expression References
*/
BOARD_ITEM* PCBEXPR_VAR_REF::GetObject( const LIBEVAL::CONTEXT* aCtx ) const
{
wxASSERT( dynamic_cast<const PCBEXPR_CONTEXT*>( aCtx ) );
const PCBEXPR_CONTEXT* ctx = static_cast<const PCBEXPR_CONTEXT*>( aCtx );
BOARD_ITEM* item = ctx->GetItem( m_itemIndex );
return item;
}
class PCBEXPR_LAYER_VALUE : public LIBEVAL::VALUE
{
public:
PCBEXPR_LAYER_VALUE( PCB_LAYER_ID aLayer ) :
LIBEVAL::VALUE( LayerName( aLayer ) ),
m_layer( aLayer )
{};
virtual bool EqualTo( LIBEVAL::CONTEXT* aCtx, const VALUE* b ) const override
{
// For boards with user-defined layer names there will be 2 entries for each layer
// in the ENUM_MAP: one for the canonical layer name and one for the user layer name.
// We need to check against both.
wxPGChoices& layerMap = ENUM_MAP<PCB_LAYER_ID>::Instance().Choices();
const wxString& layerName = b->AsString();
BOARD* board = static_cast<PCBEXPR_CONTEXT*>( aCtx )->GetBoard();
{
std::shared_lock<std::shared_mutex> readLock( board->m_CachesMutex );
auto i = board->m_LayerExpressionCache.find( layerName );
if( i != board->m_LayerExpressionCache.end() )
return i->second.Contains( m_layer );
}
LSET mask;
for( unsigned ii = 0; ii < layerMap.GetCount(); ++ii )
{
wxPGChoiceEntry& entry = layerMap[ii];
if( entry.GetText().Matches( layerName ) )
mask.set( ToLAYER_ID( entry.GetValue() ) );
}
{
std::unique_lock<std::shared_mutex> writeLock( board->m_CachesMutex );
board->m_LayerExpressionCache[ layerName ] = mask;
}
return mask.Contains( m_layer );
}
protected:
PCB_LAYER_ID m_layer;
};
class PCBEXPR_PINTYPE_VALUE : public LIBEVAL::VALUE
{
public:
PCBEXPR_PINTYPE_VALUE( const wxString& aPinTypeName ) :
LIBEVAL::VALUE( aPinTypeName )
{};
bool EqualTo( LIBEVAL::CONTEXT* aCtx, const VALUE* b ) const override
{
const wxString& thisStr = AsString();
const wxString& otherStr = b->AsString();
// Case insensitive
if( thisStr.IsSameAs( otherStr, false ) )
return true;
// Wildcards
if( thisStr.Matches( otherStr ) )
return true;
// Handle cases where the netlist token is different from the EEschema token
wxString altStr;
if( thisStr == wxT( "tri_state" ) )
altStr = wxT( "Tri-state" );
else if( thisStr == wxT( "power_in" ) )
altStr = wxT( "Power input" );
else if( thisStr == wxT( "power_out" ) )
altStr = wxT( "Power output" );
else if( thisStr == wxT( "no_connect" ) )
altStr = wxT( "Unconnected" );
if( !altStr.IsEmpty() )
{
// Case insensitive
if( altStr.IsSameAs( otherStr, false ) )
return true;
// Wildcards
if( altStr.Matches( otherStr ) )
return true;
}
return false;
}
};
class PCBEXPR_NETCLASS_VALUE : public LIBEVAL::VALUE
{
public:
PCBEXPR_NETCLASS_VALUE( BOARD_CONNECTED_ITEM* aItem ) :
LIBEVAL::VALUE( wxEmptyString ),
m_item( aItem )
{};
const wxString& AsString() const override
{
const_cast<PCBEXPR_NETCLASS_VALUE*>( this )->Set( m_item->GetEffectiveNetClass()->GetName() );
return LIBEVAL::VALUE::AsString();
}
bool EqualTo( LIBEVAL::CONTEXT* aCtx, const VALUE* b ) const override
{
if( const PCBEXPR_NETCLASS_VALUE* bValue = dynamic_cast<const PCBEXPR_NETCLASS_VALUE*>( b ) )
return *( m_item->GetEffectiveNetClass() ) == *( bValue->m_item->GetEffectiveNetClass() );
if( b->GetType() == LIBEVAL::VT_STRING )
{
// Test constituent net class names. The effective net class name (e.g. CLASS1,CLASS2,OTHER_CLASS) is
// tested in the fallthrough condition.
for( const NETCLASS* nc : m_item->GetEffectiveNetClass()->GetConstituentNetclasses() )
{
const wxString& ncName = nc->GetName();
if( b->StringIsWildcard() )
{
if( WildCompareString( b->AsString(), ncName, false ) )
return true;
}
else
{
if( ncName.IsSameAs( b->AsString(), false ) )
return true;
}
}
}
return LIBEVAL::VALUE::EqualTo( aCtx, b );
}
bool NotEqualTo( LIBEVAL::CONTEXT* aCtx, const LIBEVAL::VALUE* b ) const override
{
if( const PCBEXPR_NETCLASS_VALUE* bValue = dynamic_cast<const PCBEXPR_NETCLASS_VALUE*>( b ) )
return *( m_item->GetEffectiveNetClass() ) != *( bValue->m_item->GetEffectiveNetClass() );
if( b->GetType() == LIBEVAL::VT_STRING )
{
// Test constituent net class names
bool isInConstituents = false;
for( const NETCLASS* nc : m_item->GetEffectiveNetClass()->GetConstituentNetclasses() )
{
const wxString& ncName = nc->GetName();
if( b->StringIsWildcard() )
{
if( WildCompareString( b->AsString(), ncName, false ) )
{
isInConstituents = true;
break;
}
}
else
{
if( ncName.IsSameAs( b->AsString(), false ) )
{
isInConstituents = true;
break;
}
}
}
// Test effective net class name
const bool isFullName = LIBEVAL::VALUE::EqualTo( aCtx, b );
return !isInConstituents && !isFullName;
}
return LIBEVAL::VALUE::NotEqualTo( aCtx, b );
}
protected:
BOARD_CONNECTED_ITEM* m_item;
};
class PCBEXPR_COMPONENT_CLASS_VALUE : public LIBEVAL::VALUE
{
public:
PCBEXPR_COMPONENT_CLASS_VALUE( BOARD_ITEM* aItem ) :
LIBEVAL::VALUE( wxEmptyString ),
m_item( dynamic_cast<FOOTPRINT*>( aItem ) )
{};
const wxString& AsString() const override
{
if( !m_item )
return LIBEVAL::VALUE::AsString();
if( const COMPONENT_CLASS* compClass = m_item->GetComponentClass() )
const_cast<PCBEXPR_COMPONENT_CLASS_VALUE*>( this )->Set( compClass->GetName() );
return LIBEVAL::VALUE::AsString();
}
bool EqualTo( LIBEVAL::CONTEXT* aCtx, const VALUE* b ) const override
{
if( const PCBEXPR_COMPONENT_CLASS_VALUE* bValue = dynamic_cast<const PCBEXPR_COMPONENT_CLASS_VALUE*>( b ) )
{
if( !m_item || !bValue->m_item )
return LIBEVAL::VALUE::EqualTo( aCtx, b );
const COMPONENT_CLASS* aClass = m_item->GetComponentClass();
const COMPONENT_CLASS* bClass = bValue->m_item->GetComponentClass();
return *aClass == *bClass;
}
if( b->GetType() == LIBEVAL::VT_STRING )
{
// Test constituent component class names. The effective component class name
// (e.g. CLASS1,CLASS2,OTHER_CLASS) is tested in the fallthrough condition.
for( const COMPONENT_CLASS* cc : m_item->GetComponentClass()->GetConstituentClasses() )
{
const wxString& ccName = cc->GetName();
if( b->StringIsWildcard() )
{
if( WildCompareString( b->AsString(), ccName, false ) )
return true;
}
else
{
if( ccName.IsSameAs( b->AsString(), false ) )
return true;
}
}
}
return LIBEVAL::VALUE::EqualTo( aCtx, b );
}
bool NotEqualTo( LIBEVAL::CONTEXT* aCtx, const LIBEVAL::VALUE* b ) const override
{
if( const PCBEXPR_COMPONENT_CLASS_VALUE* bValue = dynamic_cast<const PCBEXPR_COMPONENT_CLASS_VALUE*>( b ) )
{
if( !m_item || !bValue->m_item )
return LIBEVAL::VALUE::NotEqualTo( aCtx, b );
const COMPONENT_CLASS* aClass = m_item->GetComponentClass();
const COMPONENT_CLASS* bClass = bValue->m_item->GetComponentClass();
return *aClass != *bClass;
}
if( b->GetType() == LIBEVAL::VT_STRING )
{
// Test constituent component class names
bool isInConstituents = false;
for( const COMPONENT_CLASS* cc : m_item->GetComponentClass()->GetConstituentClasses() )
{
const wxString& ccName = cc->GetName();
if( b->StringIsWildcard() )
{
if( WildCompareString( b->AsString(), ccName, false ) )
{
isInConstituents = true;
break;
}
}
else
{
if( ccName.IsSameAs( b->AsString(), false ) )
{
isInConstituents = true;
break;
}
}
}
// Test effective component class name
const bool isFullName = LIBEVAL::VALUE::EqualTo( aCtx, b );
return !isInConstituents && !isFullName;
}
return LIBEVAL::VALUE::NotEqualTo( aCtx, b );
}
protected:
FOOTPRINT* m_item;
};
class PCBEXPR_NET_VALUE : public LIBEVAL::VALUE
{
public:
PCBEXPR_NET_VALUE( BOARD_CONNECTED_ITEM* aItem ) :
LIBEVAL::VALUE( wxEmptyString ),
m_item( aItem )
{};
const wxString& AsString() const override
{
const_cast<PCBEXPR_NET_VALUE*>( this )->Set( m_item->GetNetname() );
return LIBEVAL::VALUE::AsString();
}
bool EqualTo( LIBEVAL::CONTEXT* aCtx, const VALUE* b ) const override
{
if( const PCBEXPR_NET_VALUE* bValue = dynamic_cast<const PCBEXPR_NET_VALUE*>( b ) )
return m_item->GetNetCode() == bValue->m_item->GetNetCode();
else
return LIBEVAL::VALUE::EqualTo( aCtx, b );
}
bool NotEqualTo( LIBEVAL::CONTEXT* aCtx, const LIBEVAL::VALUE* b ) const override
{
if( const PCBEXPR_NET_VALUE* bValue = dynamic_cast<const PCBEXPR_NET_VALUE*>( b ) )
return m_item->GetNetCode() != bValue->m_item->GetNetCode();
else
return LIBEVAL::VALUE::NotEqualTo( aCtx, b );
}
protected:
BOARD_CONNECTED_ITEM* m_item;
};
LIBEVAL::VALUE* PCBEXPR_VAR_REF::GetValue( LIBEVAL::CONTEXT* aCtx )
{
PCBEXPR_CONTEXT* context = static_cast<PCBEXPR_CONTEXT*>( aCtx );
if( m_type == LIBEVAL::VT_NULL )
return LIBEVAL::VALUE::MakeNullValue();
if( m_itemIndex == 2 )
return new PCBEXPR_LAYER_VALUE( context->GetLayer() );
BOARD_ITEM* item = GetObject( aCtx );
if( !item )
return new LIBEVAL::VALUE();
auto it = m_matchingTypes.find( TYPE_HASH( *item ) );
if( it == m_matchingTypes.end() )
{
// Don't force user to type "A.Type == 'via' && A.Via_Type == 'buried'" when the
// simpler "A.Via_Type == 'buried'" is perfectly clear. Instead, return an undefined
// value when the property doesn't appear on a particular object.
return new LIBEVAL::VALUE();
}
else
{
if( m_type == LIBEVAL::VT_NUMERIC )
{
if( m_isOptional )
{
std::optional<int> val = item->Get<std::optional<int>>( it->second );
if( val.has_value() )
return new LIBEVAL::VALUE( static_cast<double>( val.value() ) );
return LIBEVAL::VALUE::MakeNullValue();
}
return new LIBEVAL::VALUE( static_cast<double>( item->Get<int>( it->second ) ) );
}
else if( m_type == LIBEVAL::VT_NUMERIC_DOUBLE )
{
if( m_isOptional )
{
std::optional<double> val = item->Get<std::optional<double>>( it->second );
if( val.has_value() )
return new LIBEVAL::VALUE( val.value() );
return LIBEVAL::VALUE::MakeNullValue();
}
return new LIBEVAL::VALUE( item->Get<double>( it->second ) );
}
else
{
wxString str;
if( !m_isEnum )
{
str = item->Get<wxString>( it->second );
if( it->second->Name() == wxT( "Pin Type" ) )
return new PCBEXPR_PINTYPE_VALUE( str );
// If it quacks like a duck, it is a duck
double doubleVal;
if( EDA_UNIT_UTILS::UI::DoubleValueFromString( pcbIUScale, str, doubleVal ) )
return new LIBEVAL::VALUE( doubleVal );
return new LIBEVAL::VALUE( str );
}
else if( it->second->Name() == wxT( "Layer" )
|| it->second->Name() == wxT( "Layer Top" )
|| it->second->Name() == wxT( "Layer Bottom" ) )
{
const wxAny& any = item->Get( it->second );
PCB_LAYER_ID layer;
if( any.GetAs<PCB_LAYER_ID>( &layer ) )
return new PCBEXPR_LAYER_VALUE( layer );
else if( any.GetAs<wxString>( &str ) )
return new PCBEXPR_LAYER_VALUE( context->GetBoard()->GetLayerID( str ) );
}
else
{
const wxAny& any = item->Get( it->second );
if( any.GetAs<wxString>( &str ) )
return new LIBEVAL::VALUE( str );
}
return new LIBEVAL::VALUE();
}
}
}
LIBEVAL::VALUE* PCBEXPR_NETCLASS_REF::GetValue( LIBEVAL::CONTEXT* aCtx )
{
BOARD_CONNECTED_ITEM* item = dynamic_cast<BOARD_CONNECTED_ITEM*>( GetObject( aCtx ) );
if( !item )
return new LIBEVAL::VALUE();
return new PCBEXPR_NETCLASS_VALUE( item );
}
LIBEVAL::VALUE* PCBEXPR_COMPONENT_CLASS_REF::GetValue( LIBEVAL::CONTEXT* aCtx )
{
BOARD_ITEM* item = dynamic_cast<BOARD_ITEM*>( GetObject( aCtx ) );
if( !item || item->Type() != PCB_FOOTPRINT_T )
return new LIBEVAL::VALUE();
return new PCBEXPR_COMPONENT_CLASS_VALUE( item );
}
LIBEVAL::VALUE* PCBEXPR_NETNAME_REF::GetValue( LIBEVAL::CONTEXT* aCtx )
{
BOARD_CONNECTED_ITEM* item = dynamic_cast<BOARD_CONNECTED_ITEM*>( GetObject( aCtx ) );
if( !item )
return new LIBEVAL::VALUE();
return new PCBEXPR_NET_VALUE( item );
}
LIBEVAL::VALUE* PCBEXPR_TYPE_REF::GetValue( LIBEVAL::CONTEXT* aCtx )
{
BOARD_ITEM* item = GetObject( aCtx );
if( !item )
return new LIBEVAL::VALUE();
return new LIBEVAL::VALUE( ENUM_MAP<KICAD_T>::Instance().ToString( item->Type() ) );
}
LIBEVAL::FUNC_CALL_REF PCBEXPR_UCODE::CreateFuncCall( const wxString& aName )
{
PCBEXPR_BUILTIN_FUNCTIONS& registry = PCBEXPR_BUILTIN_FUNCTIONS::Instance();
return registry.Get( aName.Lower() );
}
std::unique_ptr<LIBEVAL::VAR_REF> PCBEXPR_UCODE::CreateVarRef( const wxString& aVar,
const wxString& aField )
{
PROPERTY_MANAGER& propMgr = PROPERTY_MANAGER::Instance();
std::unique_ptr<PCBEXPR_VAR_REF> vref;
if( aVar.IsSameAs( wxT( "null" ), false ) )
{
vref = std::make_unique<PCBEXPR_VAR_REF>( 0 );
vref->SetType( LIBEVAL::VT_NULL );
return vref;
}
// Check for a couple of very common cases and compile them straight to "object code".
if( aField.CmpNoCase( wxT( "NetClass" ) ) == 0 )
{
if( aVar == wxT( "A" ) )
return std::make_unique<PCBEXPR_NETCLASS_REF>( 0 );
else if( aVar == wxT( "B" ) )
return std::make_unique<PCBEXPR_NETCLASS_REF>( 1 );
else
return nullptr;
}
else if( aField.CmpNoCase( wxT( "ComponentClass" ) ) == 0 )
{
if( aVar == wxT( "A" ) )
return std::make_unique<PCBEXPR_COMPONENT_CLASS_REF>( 0 );
else if( aVar == wxT( "B" ) )
return std::make_unique<PCBEXPR_COMPONENT_CLASS_REF>( 1 );
else
return nullptr;
}
else if( aField.CmpNoCase( wxT( "NetName" ) ) == 0 )
{
if( aVar == wxT( "A" ) )
return std::make_unique<PCBEXPR_NETNAME_REF>( 0 );
else if( aVar == wxT( "B" ) )
return std::make_unique<PCBEXPR_NETNAME_REF>( 1 );
else
return nullptr;
}
else if( aField.CmpNoCase( wxT( "Type" ) ) == 0 )
{
if( aVar == wxT( "A" ) )
return std::make_unique<PCBEXPR_TYPE_REF>( 0 );
else if( aVar == wxT( "B" ) )
return std::make_unique<PCBEXPR_TYPE_REF>( 1 );
else
return nullptr;
}
if( aVar == wxT( "A" ) || aVar == wxT( "AB" ) )
vref = std::make_unique<PCBEXPR_VAR_REF>( 0 );
else if( aVar == wxT( "B" ) )
vref = std::make_unique<PCBEXPR_VAR_REF>( 1 );
else if( aVar == wxT( "L" ) )
vref = std::make_unique<PCBEXPR_VAR_REF>( 2 );
else
return nullptr;
if( aField.length() == 0 ) // return reference to base object
return vref;
wxString field( aField );
field.Replace( wxT( "_" ), wxT( " " ) );
for( const PROPERTY_MANAGER::CLASS_INFO& cls : propMgr.GetAllClasses() )
{
if( propMgr.IsOfType( cls.type, TYPE_HASH( BOARD_ITEM ) ) )
{
PROPERTY_BASE* prop = propMgr.GetProperty( cls.type, field );
if( prop )
{
vref->AddAllowedClass( cls.type, prop );
if( prop->TypeHash() == TYPE_HASH( int ) )
{
vref->SetType( LIBEVAL::VT_NUMERIC );
}
else if( prop->TypeHash() == TYPE_HASH( std::optional<int> ) )
{
vref->SetType( LIBEVAL::VT_NUMERIC );
vref->SetIsOptional();
}
else if( prop->TypeHash() == TYPE_HASH( double ) )
{
vref->SetType( LIBEVAL::VT_NUMERIC_DOUBLE );
}
else if( prop->TypeHash() == TYPE_HASH( std::optional<double> ) )
{
vref->SetType( LIBEVAL::VT_NUMERIC_DOUBLE );
vref->SetIsOptional();
}
else if( prop->TypeHash() == TYPE_HASH( bool ) )
{
vref->SetType( LIBEVAL::VT_NUMERIC );
}
else if( prop->TypeHash() == TYPE_HASH( wxString ) )
{
vref->SetType( LIBEVAL::VT_STRING );
}
else if ( prop->HasChoices() )
{ // it's an enum, we treat it as string
vref->SetType( LIBEVAL::VT_STRING );
vref->SetIsEnum( true );
}
else
{
wxString msg = wxString::Format( wxT( "PCBEXPR_UCODE::createVarRef: Unknown "
"property type %s from %s." ),
cls.name,
field );
wxFAIL_MSG( msg );
}
}
}
}
if( vref->GetType() == LIBEVAL::VT_UNDEFINED )
vref->SetType( LIBEVAL::VT_PARSE_ERROR );
return vref;
}
BOARD* PCBEXPR_CONTEXT::GetBoard() const
{
if( m_items[0] )
return m_items[0]->GetBoard();
return nullptr;
}
/* --------------------------------------------------------------------------------------------
* Unit Resolvers
*/
const std::vector<wxString>& PCBEXPR_UNIT_RESOLVER::GetSupportedUnits() const
{
static const std::vector<wxString> pcbUnits = { wxT( "mil" ), wxT( "mm" ), wxT( "in" ),
wxT( "deg" ), wxT( "fs" ), wxT( "ps" ) };
return pcbUnits;
}
wxString PCBEXPR_UNIT_RESOLVER::GetSupportedUnitsMessage() const
{
return _( "must be mm, in, mil, deg, fs, or ps" );
}
const std::vector<EDA_UNITS>& PCBEXPR_UNIT_RESOLVER::GetSupportedUnitsTypes() const
{
static const std::vector<EDA_UNITS> pcbUnits = { EDA_UNITS::MILS, EDA_UNITS::MM, EDA_UNITS::INCH,
EDA_UNITS::DEGREES, EDA_UNITS::FS, EDA_UNITS::PS };
return pcbUnits;
}
double PCBEXPR_UNIT_RESOLVER::Convert( const wxString& aString, int unitId ) const
{
double v = wxAtof( aString );
switch( unitId )
{
case 0: return EDA_UNIT_UTILS::UI::DoubleValueFromString( pcbIUScale, EDA_UNITS::MILS, aString );
case 1: return EDA_UNIT_UTILS::UI::DoubleValueFromString( pcbIUScale, EDA_UNITS::MM, aString );
case 2: return EDA_UNIT_UTILS::UI::DoubleValueFromString( pcbIUScale, EDA_UNITS::INCH, aString );
case 3: return v;
case 4: return EDA_UNIT_UTILS::UI::DoubleValueFromString( pcbIUScale, EDA_UNITS::FS, aString );
case 5: return EDA_UNIT_UTILS::UI::DoubleValueFromString( pcbIUScale, EDA_UNITS::PS, aString );
default: return v;
}
};
const std::vector<wxString>& PCBEXPR_UNITLESS_RESOLVER::GetSupportedUnits() const
{
static const std::vector<wxString> emptyUnits;
return emptyUnits;
}
const std::vector<EDA_UNITS>& PCBEXPR_UNITLESS_RESOLVER::GetSupportedUnitsTypes() const
{
static const std::vector<EDA_UNITS> emptyUnits;
return emptyUnits;
}
double PCBEXPR_UNITLESS_RESOLVER::Convert( const wxString& aString, int unitId ) const
{
return wxAtof( aString );
};
PCBEXPR_COMPILER::PCBEXPR_COMPILER( LIBEVAL::UNIT_RESOLVER* aUnitResolver )
{
m_unitResolver.reset( aUnitResolver );
}
/* --------------------------------------------------------------------------------------------
* PCB Expression Evaluator
*/
PCBEXPR_EVALUATOR::PCBEXPR_EVALUATOR( LIBEVAL::UNIT_RESOLVER* aUnitResolver ) :
m_result( 0 ),
m_units( EDA_UNITS::MM ),
m_compiler( aUnitResolver ),
m_ucode(),
m_errorStatus()
{
}
PCBEXPR_EVALUATOR::~PCBEXPR_EVALUATOR()
{
}
bool PCBEXPR_EVALUATOR::Evaluate( const wxString& aExpr )
{
PCBEXPR_UCODE ucode;
PCBEXPR_CONTEXT preflightContext( NULL_CONSTRAINT, F_Cu );
if( !m_compiler.Compile( aExpr.ToUTF8().data(), &ucode, &preflightContext ) )
return false;
PCBEXPR_CONTEXT evaluationContext( NULL_CONSTRAINT, F_Cu );
LIBEVAL::VALUE* result = ucode.Run( &evaluationContext );
if( result->GetType() == LIBEVAL::VT_NUMERIC )
{
m_result = KiROUND( result->AsDouble() );
m_units = result->GetUnits();
}
return true;
}