private static bool IsValidSwitchBucketConstant(ConstantValue constant)
{
return(constant != null &&
SwitchConstantValueHelper.IsValidSwitchCaseLabelConstant(constant) &&
!constant.IsNull &&
!constant.IsString);
}
private static int CompareIntegralSwitchLabels(
KeyValuePair <ConstantValue, object> first,
KeyValuePair <ConstantValue, object> second
)
{
ConstantValue firstConstant = first.Key;
ConstantValue secondConstant = second.Key;
RoslynDebug.Assert(firstConstant != null);
Debug.Assert(
SwitchConstantValueHelper.IsValidSwitchCaseLabelConstant(firstConstant) &&
!firstConstant.IsString
);
RoslynDebug.Assert(secondConstant != null);
Debug.Assert(
SwitchConstantValueHelper.IsValidSwitchCaseLabelConstant(secondConstant) &&
!secondConstant.IsString
);
return(SwitchConstantValueHelper.CompareSwitchCaseLabelConstants(
firstConstant,
secondConstant
));
}
private void EmitCondBranchForSwitch(ILOpCode branchCode, ConstantValue constant, object targetLabel)
{
Debug.Assert(branchCode.IsBranchToLabel());
Debug.Assert(constant != null &&
SwitchConstantValueHelper.IsValidSwitchCaseLabelConstant(constant));
Debug.Assert(targetLabel != null);
// ldloc key
// ldc constant
// branch branchCode targetLabel
_builder.EmitLoad(_key);
_builder.EmitConstantValue(constant);
_builder.EmitBranch(branchCode, targetLabel, GetReverseBranchCode(branchCode));
}
private void EmitEqBranchForSwitch(ConstantValue constant, object targetLabel)
{
Debug.Assert(constant != null &&
SwitchConstantValueHelper.IsValidSwitchCaseLabelConstant(constant));
Debug.Assert(targetLabel != null);
_builder.EmitLoad(_key);
if (constant.IsDefaultValue)
{
// ldloc key
// brfalse targetLabel
_builder.EmitBranch(ILOpCode.Brfalse, targetLabel);
}
else
{
_builder.EmitConstantValue(constant);
_builder.EmitBranch(ILOpCode.Beq, targetLabel);
}
}