[module.unit]p1 says:
-> All module-names either beginning with an identifier consisting of std followed by zero
+::
+
+ All module-names either beginning with an identifier consisting of std followed by zero
or more digits or containing a reserved identifier ([lex.name]) are reserved and shall not
be specified in a module-declaration; no diagnostic is required. If any identifier in a reserved
module-name is a reserved identifier, the module name is reserved for use by C++ implementations;
.. code-block:: c++
# __LINE_NUMBER__ __FILE__ 1 3
- export moudle std;
+ export module std;
Here the `__LINE_NUMBER__` is the actual line number of the corresponding line. The `__FILE__` means the filename
of the translation unit. The `1` means the following is a new file. And `3` means this is a system header/file so