Boost.PP: maximum length of a preprocessor macro, of PP
Hello I assign the list of all directories the names of which starts with a pattern like pattern_.... to a cmake variable which I then pass as a preprocessor macro: FILE(GLOB MYPROJECT_LIST_SYSTEMS RELATIVE ${CMAKE_SOURCE_DIR} system_*) MYPROJECT_LIST_SYSTEMS is then a cmake "list", a string with semicolon separators. I will then define a preprocessor macro MYPROJECT_LIST_SYSTEMS with the same contents. 1. What is the maximum length of a preprocessor macro (g++4.4, msvc2008/10)? 2. I will create in a source file a list of class instances all with the same names in the passed macro. I reckon I can use a PP sequence, list, tuple or array. Is there any max length here? What is the fastest way in terms of PP time? Regards,
AMDG Hicham Mouline wrote:
I assign the list of all directories the names of which starts with a pattern like pattern_.... to a cmake variable which I then pass as a preprocessor macro:
FILE(GLOB MYPROJECT_LIST_SYSTEMS RELATIVE ${CMAKE_SOURCE_DIR} system_*)
MYPROJECT_LIST_SYSTEMS is then a cmake "list", a string with semicolon separators.
I will then define a preprocessor macro MYPROJECT_LIST_SYSTEMS with the same contents.
1. What is the maximum length of a preprocessor macro (g++4.4, msvc2008/10)?
If you pass it on the command line, then you're limited by the operating system's command line length. If you're using a response file, there's no fixed limit that I know of.
2. I will create in a source file a list of class instances all with the same names in the passed macro. I reckon I can use a PP sequence, list, tuple or array. Is there any max length here?
Most of the preprocessor library is limited to 256. However, some preprocessors blow out sooner.
What is the fastest way in terms of PP time?
In Christ, Steven Watanabe
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Hicham Mouline -
Steven Watanabe