Preprocessor

The AVRASM2 preprocessor is modeled after the C preprocessor, with some exceptions:

• It recognizes all integer formats used by AVRASM2, i.e., $abcd and 0b011001 are recognized as valid integers by the preprocessor and can be used in expressions in #if directives.
• '.' and '@' are allowed in identifiers. '.' is required to allow preprocessor directives like '.dw' to be used in preprocessor macros, '@' is required to handle assembler macro arguments correctly.
• It recognizes assembler-style comment delimiters (';') as well as C-style comments. Using ';' as a comment delimiter is in conflict with the C use of ';', and it is therefore not recommended to use assembler-style comments in conjunction with preprocessor directives.
• The #line directive is not implemented
• Variadic macros (i.e., macros with variable number of arguments) are not implemented
• The #warning and #message directives are not specified in the ANSI C standard