private ILanguageExpressionAtomic CompileRhsValueAccess(LanguageValueAccess valueAccess)
{
var compiledRootSymbol = valueAccess.RootSymbol;
//Replace a reference to a constant by its value
var namedValue = compiledRootSymbol as SymbolNamedValue;
if (namedValue != null)
{
var compiledFullValue = namedValue.AssociatedValue;
return
(valueAccess.IsFullAccess
? compiledFullValue.DuplicateValue(true)
: ValueAccessProcessor.ReadPartialValue(compiledFullValue, valueAccess).DuplicateValue(true));
}
if (compiledRootSymbol is SymbolLocalVariable || compiledRootSymbol is SymbolProcedureParameter)
{
compiledRootSymbol = GetSymbolData((SymbolDataStore)compiledRootSymbol);
}
var compiledValueAccess = LanguageValueAccess.Create(compiledRootSymbol);
if (valueAccess.IsPartialAccess)
{
//Note: This will not be correct for components of class ValueAccessStepBySymbol
//because the component symbol must be compiled too. But GMac doesn't use these components anyway
compiledValueAccess.Append(valueAccess.PartialAccessSteps);
}
return(compiledValueAccess);
}
/// <summary>
/// Read the value associated with a value access process
/// </summary>
/// <param name="valueAccess"></param>
/// <returns></returns>
public virtual ILanguageValue Visit(LanguageValueAccess valueAccess)
{
var value = ReadSymbolFullValue(valueAccess.RootSymbol);
return
(valueAccess.IsFullAccess ?
value :
ValueAccessProcessor.ReadPartialValue(value, valueAccess));
}