public override object VisitVariableDeclaration_Array([NotNull] CMinusParser.VariableDeclaration_ArrayContext context)
{
string variableName = context.ID().GetText();
string variableType = SymbolTable.Symbol.RemoveExtras(context.typeSpecifier().GetText());
if (variableType == "void")
{
this.EmitSemanticErrorMessage("Variable declared as void type", context);
}
SymbolTable.Symbol symbol = new SymbolTable.Symbol(
id: variableName,
type: variableType,
construct: SymbolTable.Symbol.Construct.ARRAY,
scope: 0,
size: uint.Parse(context.NUM().GetText()),
pointerCount: SymbolTable.Symbol.CountStringAsterisks(context.typeSpecifier().GetText())
);
bool success = this.symbolTable.AddSymbol(symbol);
if (!success)
{
this.EmitSemanticErrorMessage($"Symbol {variableName} already in symbol table as a {this.symbolTable.GetSymbol(variableName).construct}", context);
}
return(null);
}
public override object VisitVariableDeclaration_Array([NotNull] CMinusParser.VariableDeclaration_ArrayContext context)
{
string arrayName = context.ID().GetText();
int arraySize = int.Parse(context.NUM().GetText());
this.symbolTable.AddVariable(arrayName, arraySize + 1);
int arrayPosition;
if (this.inGlobalScope)
{
arrayPosition = 0;
}
else
{
arrayPosition = this.symbolTable.GetVariableIndex(arrayName);
}
this.writer.WriteVariableAddress($"{arrayName}[0]", arrayPosition + 1);
this.writer.WriteContextRegisterRead();
this.writer.WriteBinaryArithmeticExpression("+");
this.writer.WriteVariableAddress(arrayName, arrayPosition);
this.writer.WriteContextRegisterRead();
this.writer.WriteBinaryArithmeticExpression("+");
this.writer.WriteMemoryWrite();
if (this.inGlobalScope)
{
this.writer.WriteContextRegisterRead();
this.writer.WriteImmediate(arraySize + 1);
this.writer.WriteBinaryArithmeticExpression("+");
this.writer.WriteContextRegisterWrite();
}
return(null);
}
