Namespace or template inside ifdef causing false syntax errors

[mayshukla]

Example:

#ifdef A
namespace foo {
  int i;
}
#endif

Output:

tmp.cpp:2:1: error: expected unqualified-id
namespace foo {
^
namespace foo {
    int i; // In context: A
}// In context: A
1 error generated.

Note that this error is only emitted if namespace is the first thing inside the ifdef

[mayshukla]

This issue also occurs when there is a template keyword immediately after #ifdef

For example:

#ifdef A
template <typename T>
void foo() {}
#endif

Output:

error: expected unqualified-id
template <typename T>
^
1 error generated.

[mayshukla]

Fixed in 3c8ab40