/// <summary>
/// <para>Load a value from the specified local variable.</para>
/// </summary>
/// <param name = "sym">The variable to load.</param>
public void EmitLoadPValue(CilSymbol sym)
{
if (sym.Kind == SymbolKind.Local)
{
EmitLoadLocal(sym.Local);
}
else if (sym.Kind == SymbolKind.LocalRef)
{
EmitLoadLocal(sym.Local);
Il.EmitCall(OpCodes.Call, Compiler.GetValueMethod, null);
}
else
{
throw new PrexoniteException("Cannot emit code for CilSymbol");
}
}
private static void _buildSymbolTable(CompilerState state)
{
//Create local ref variables for shared names
// and populate them with the contents of the sharedVariables parameter
if (state.Source.Meta.ContainsKey(PFunction.SharedNamesKey))
{
var sharedNames = state.Source.Meta[PFunction.SharedNamesKey].List;
for (var i = 0; i < sharedNames.Length; i++)
{
if (state.Source.Variables.Contains(sharedNames[i]))
continue; //Arguments are redeclarations.
var sym = new CilSymbol(SymbolKind.LocalRef)
{
Local = state.Il.DeclareLocal(typeof (PVariable))
};
var id = sharedNames[i].Text;
state.EmitLoadArg(CompilerState.ParamSharedVariablesIndex);
state.Il.Emit(OpCodes.Ldc_I4, i);
state.Il.Emit(OpCodes.Ldelem_Ref);
state.EmitStoreLocal(sym.Local.LocalIndex);
state.Symbols.Add(id, sym);
}
}
//Create index -> id map
foreach (var mapping in state.Source.LocalVariableMapping)
state.IndexMap.Add(mapping.Value, mapping.Key);
//Add entries for paramters
foreach (var parameter in state.Source.Parameters)
if (!state.Symbols.ContainsKey(parameter))
state.Symbols.Add(parameter, new CilSymbol(SymbolKind.Local));
//Add entries for enumerator variables
foreach (var hint in state._ForeachHints)
{
if (state.Symbols.ContainsKey(hint.EnumVar))
throw new PrexoniteException(
"Invalid foreach hint. Enumerator variable is shared.");
state.Symbols.Add(hint.EnumVar, new CilSymbol(SymbolKind.LocalEnum));
}
//Add entries for non-shared local variables
foreach (var variable in state.Source.Variables)
if (!state.Symbols.ContainsKey(variable))
state.Symbols.Add(variable, new CilSymbol(SymbolKind.Local));
}