public MipsProgram VisitStringConstant(ASTCILStringConstantNode StringConstant)
{
var result = new MipsProgram();
var stringValue = Regex.Unescape(StringConstant.Value);
if (!StringConstantGenerated.TryGetValue(StringConstant.Value, out var labelStringConstant))
{
result.SectionData.Append(MipsGenerationHelper.NewScript()
.AddData(StringConstant.ObjectLabel,
new[]
{
MipsGenerationHelper.AddIntData(
labelGenerator.GenerateLabelTypeInfo(CompilationUnit.TypeEnvironment.String.Name)),
MipsGenerationHelper.AddIntData(StringConstant.ValueLabel),
MipsGenerationHelper.AddIntData(stringValue.Length)
})
.Comment(StringConstant.Value)
.AddData(StringConstant.ValueLabel, new[]
{
MipsGenerationHelper.AddByteData(Regex.Unescape(StringConstant.Value).Select(x => (int)x))
}));
StringConstantGenerated.Add(StringConstant.Value, StringConstant.ObjectLabel);
labelStringConstant = StringConstant.ObjectLabel;
}
result.SectionCode.Append(MipsGenerationHelper.NewScript()
.LoadFromAddress(MipsRegisterSet.a0, labelStringConstant)
.Add(MipsRegisterSet.a0, 4));
return(result);
}
public ASTCILNode VisitLetIn(ASTLetInNode LetIn)
{
return(new ASTCILBlockNode(LetIn.Declarations.SelectMany(x =>
{
ASTCILExpressionNode expression;
compilationUnit.TypeEnvironment.GetTypeDefinition(x.Type.Text, LetIn.SymbolTable, out var type);
if (x.Expression != null)
{
expression = (ASTCILExpressionNode)x.Expression.Accept(this);
}
else if (x.Type.Text == Types.Bool)
{
expression = new ASTCILBoolConstantNode(false);
}
else if (x.Type.Text == Types.Int)
{
expression = new ASTCILIntConstantNode(0);
}
else if (x.Type.Text == Types.String)
{
expression = new ASTCILStringConstantNode("", labelIlGenerator.GenerateEmptyStringData());
}
else
{
expression = new ASTCILVoidNode();
}
return new ASTCILExpressionNode[]
{
new ASTCILAssignmentNode(x.Id, expression)
};
}).Append((ASTCILExpressionNode)LetIn.LetExp.Accept(this))));
}
