private void AnalyzeFunction(
FunctionUnit functionUnit,
WarningEmitter warningEmitter)
{
if (functionUnit.FunctionSymbol.IsCompilerGenerated())
{
return;
}
var instructions = functionUnit.Instructions.ToList();
foreach (var instruction in instructions)
{
if (instruction.SourceOperand == null)
{
// 変数定義
continue;
}
if (instruction.DestinationOperand == null ||
instruction.DestinationOperand?.UseInstruction != null ||
!functionUnit.SymbolTable.AllSymbols.Contains(instruction.DestinationOperand.Symbol))
{
continue;
}
var returnedOperands = functionUnit.IsNoReturn()
? null
: instructions
.Where(inst => inst.IsReturn)
.Select(inst => inst.SourceOperand.DefinitionInstruction.DestinationOperand)
.ToList();
var isUsedOnAnyCopiedOperand = EnumerableUtility.Seek(
instruction,
inst => inst.SourceOperand?.DefinitionInstruction,
inst => inst.IsCopy)
.Select(inst => inst.DestinationOperand)
.Any(op => op.UseInstruction != null && returnedOperands.Contains(op));
if (!isUsedOnAnyCopiedOperand)
{
this.Violate(warningEmitter, instruction, instruction.DestinationOperand.Symbol);
}
}
}
private void AnalyzeFunction(
FunctionUnit functionUnit,
WarningEmitter warningEmitter)
{
var comps = functionUnit.Instructions.OfType<CompareInstruction>().ToList();
foreach (var comp in comps)
{
if (comp.GetFileName().IsNull)
{
// ラムダ式などから生成されたメソッドで対応コードが無い部分の場合
continue;
}
var functionSymbol =
comp.SourceOperand2.IsNullPtr()
? comp.SourceOperand1.DefinitionInstruction.SourceOperand?.AsFunctionOperand?.FunctionSymbol
: comp.SourceOperand1.IsNullPtr()
? comp.SourceOperand2.DefinitionInstruction.SourceOperand?.AsFunctionOperand?.FunctionSymbol
: null;
if (functionSymbol == null)
{
continue;
}
var symbol = functionSymbol.UninstantiatedFunctionSymbol ?? functionSymbol;
var fullNameWithoutGenericParameter = string.Format(
"{0}.{1}",
symbol.EnclosingAggregateType.DefinitionType.TypeSymbol.NameString,
symbol.NameString);
if (Settings.UnNullReturnMethod.Contains(fullNameWithoutGenericParameter))
{
this.Violate(warningEmitter, comp, symbol);
}
}
}
private void AnalyzeFunction(
FunctionUnit functionUnit,
WarningEmitter warningEmitter)
{
//this.Violate(warningEmitter, functionUnit.FirstInstruction);
}
protected void Violate(WarningEmitter warningEmitter, Instruction instruction, params object[] args)
{
var violationMessage = this.ReportLocalizedWarning(instruction, args);
Debug.WriteLine(violationMessage.ToString(), args);
warningEmitter.Add(violationMessage);
}