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What does "expected unqualified-id before numeric constant" mean?

In my app, there is a namespace definition.

....
namespace CMD {
...
const int YT_UP = 1; // line 149
...
};

g++ tells expected unqualified-id before numeric constant error at
line 149.
I change it to be

namespace CMD {
...
const int YT_UP1 = 1; // line 149
...
};

It compiles ok.

So is there name collision for YT_UP?
Dec 25 '07 #1
1 45725
Allen wrote:
:: In my app, there is a namespace definition.
::
:: ...
:: namespace CMD {
:: ...
:: const int YT_UP = 1; // line 149
:: ...
:: };
::
:: g++ tells expected unqualified-id before numeric constant error at
:: line 149.
:: I change it to be
::
:: namespace CMD {
:: ...
:: const int YT_UP1 = 1; // line 149
:: ...
:: };
::
:: It compiles ok.
::
:: So is there name collision for YT_UP?

Probably.

All uppercase names are often used for preprocessor macros, which
doesn't respect namespace scopes. Therefore such names should
generally be avoided for everything else.

Bo Persson
Dec 25 '07 #2

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