void CodeWriter::RunList(char delimiter, const ast::NodeList& nodes) {
CodeWriter self;
if (nodes.size()) {
RunButLast(delimiter, nodes);
nodes.back()->Accept(&self);
}
}
void CodeWriter::RunButLast(char delimiter, const ast::NodeList& nodes) {
CodeWriter self;
if (nodes.size()) {
for (uint i = 0; i < nodes.size() - 1; ++i) {
nodes[i]->Accept(&self);
get_pipe()(delimiter);
}
}
}
//----------------------------------------------------------------------------
void EvaluatorVisitor::visit( const AST::FunctionExpression* const node )
{
ScalarList evaluatedArgs;
AST::NodeList params = node->getParameterList();
for ( unsigned int i = 0; i < params.size(); ++i )
{
AST::INode* argNode = params[ i ];
argNode->accept( this );
evaluatedArgs.push_back( mBranchValue );
}
//process function
mSymbolTable.evaluateFunction( mBranchValue, node->getName(), evaluatedArgs );
}
//----------------------------------------------------------------------------
void EvaluatorVisitor::visit( const AST::ArithmeticExpression* const node )
{
AST::ArithmeticExpression::Operator op = node->getOperator();
AST::NodeList operands = node->getOperands();
AST::NodeList::iterator it;
AST::ConstantExpression prevBranchValue;
it = operands.begin();
// evaluate first operand and set temporary branch value
if ( it != operands.end() )
{
( *it ) ->accept( this );
++it;
}
// evaluate other operands AND apply operation
for ( ; it != operands.end(); ++it )
{
prevBranchValue = mBranchValue;
( *it ) ->accept( this );
switch ( op )
{
case AST::ArithmeticExpression::ADD:
mBranchValue = prevBranchValue + mBranchValue;
break;
case AST::ArithmeticExpression::SUB:
mBranchValue = prevBranchValue - mBranchValue;
break;
case AST::ArithmeticExpression::MUL:
mBranchValue = prevBranchValue * mBranchValue;
break;
case AST::ArithmeticExpression::DIV:
mBranchValue = prevBranchValue / mBranchValue;
break;
default:
//@todo: exception handling
break;
}
}
}