private CompilerOptimizedSwitchByStringStatement ComposeSwitch(CreateCompilerOptimizedSwitchByStringStatementsStep.SwitchData data)
{
V_0 = new CompilerOptimizedSwitchByStringStatement(data.get_SwitchExpression(), data.get_SwitchExpressionLoadInstructions());
V_1 = data.get_CaseConditionToBlockMap().GetEnumerator();
try
{
while (V_1.MoveNext())
{
V_2 = V_1.get_Current();
if (V_2.get_Value() != null && SwitchHelpers.BlockHasFallThroughSemantics(V_2.get_Value()))
{
V_2.get_Value().AddStatement(new BreakSwitchCaseStatement());
}
V_0.AddCase(new ConditionCase(V_2.get_Key(), V_2.get_Value()));
}
}
finally
{
((IDisposable)V_1).Dispose();
}
if (data.get_HaveDefaultCase())
{
if (SwitchHelpers.BlockHasFallThroughSemantics(data.get_DefaultCase()))
{
data.get_DefaultCase().AddStatement(new BreakSwitchCaseStatement());
}
V_0.AddCase(new DefaultCase(data.get_DefaultCase()));
}
return(V_0);
}
private bool TryGetSwitchData(IfElseIfStatement node, out CreateCompilerOptimizedSwitchByStringStatementsStep.SwitchData data)
{
data = new CreateCompilerOptimizedSwitchByStringStatementsStep.SwitchData();
V_0 = node.get_ConditionBlocks().GetEnumerator();
try
{
while (V_0.MoveNext())
{
V_1 = V_0.get_Current();
if (this.TryMatchCondition(V_1.get_Key(), V_1.get_Value(), data))
{
continue;
}
V_2 = false;
goto Label1;
}
goto Label0;
}
finally
{
((IDisposable)V_0).Dispose();
}
Label1:
return(V_2);
Label0:
if (node.get_Else() != null)
{
data.set_DefaultCase(node.get_Else());
}
return(true);
}
private bool TryMatchCondition(Expression condition, BlockStatement block, CreateCompilerOptimizedSwitchByStringStatementsStep.SwitchData data)
{
if (condition.get_CodeNodeType() != 23 && condition.get_CodeNodeType() != 24)
{
return(false);
}
if (condition.get_CodeNodeType() != 24)
{
V_5 = condition as UnaryExpression;
if (V_5.get_Operator() != 11 || V_5.get_Operand().get_CodeNodeType() != 24)
{
return(false);
}
V_0 = V_5.get_Operand() as BinaryExpression;
}
else
{
V_0 = condition as BinaryExpression;
if (V_0.get_Operator() == 11)
{
if (!this.TryMatchCondition(V_0.get_Left(), null, data) || !this.TryMatchCondition(V_0.get_Right(), null, data))
{
return(false);
}
if (block != null)
{
V_2 = data.get_CaseConditionToBlockMap().get_Count() - 1;
V_4 = data.get_CaseConditionToBlockMap().get_Item(V_2);
V_3 = V_4.get_Key();
data.get_CaseConditionToBlockMap().set_Item(V_2, new KeyValuePair <Expression, BlockStatement>(V_3, block));
}
return(true);
}
}
if (V_0.get_Right().get_CodeNodeType() != 22 || V_0.get_Operator() != 9)
{
return(false);
}
V_1 = V_0.get_Right() as LiteralExpression;
if (condition.get_CodeNodeType() == 23 && String.op_Inequality(V_1.get_ExpressionType().get_FullName(), "System.String"))
{
return(false);
}
if (condition.get_CodeNodeType() == 24 && String.op_Inequality(V_1.get_ExpressionType().get_FullName(), "System.Object") || V_1.get_Value() != null)
{
return(false);
}
if (data.get_SwitchExpression() != null)
{
if (!data.get_SwitchExpression().Equals(V_0.get_Left()))
{
return(false);
}
data.get_SwitchExpressionLoadInstructions().Add(V_0.get_Left().get_UnderlyingSameMethodInstructions().First <Instruction>().get_Offset());
}
else
{
data.set_SwitchExpression(V_0.get_Left());
}
data.get_CaseConditionToBlockMap().Add(new KeyValuePair <Expression, BlockStatement>(V_1, block));
return(true);
}
