Re: cpp state

[Henrik Grubbström]

On Sun, 13 Apr 2025, will...@welliver.org wrote:


Hi-


Hi Bill.

I don't suppose there's any way to access the state of the preprocessor 
following an invocation? I'm looking for a way to read a header file (for 
example) and determine what defines are present and their values. I suppose I 
can append some pike-code to the string in question and use that to populate 
variables which can then be evaluated, but what would only work if I already 
know the name of the define I'm looking for.


I don't recall this being available, but thought I'd ask. Happy to hear any 
suggestions!


It is almost available. The variable holding the mapping with the active
macros is currently declared private, and there is no accessor or getter
for it.

Otherwise something like:

  CompilerEnvironment.CPP my_cpp = DefaultCompilerEnvironment.CPP();
  my_cpp->init_pike_cpp();
  string out = my_cpp->high_cpp(in);
  // Access the private mapping cpp->defines here.

could work.


Bill


/grubba

Hmm... Looks like some of the symbols in CPP are still undocumented.

--
Henrik Grubbström   gru...@roxen.com
Roxen Internet Software AB

cpp state

[william]

Hi-

I don't suppose there's any way to access the state of the preprocessor 
following an invocation? I'm looking for a way to read a header file 
(for example) and determine what defines are present and their values. I 
suppose I can append some pike-code to the string in question and use 
that to populate variables which can then be evaluated, but what would 
only work if I already know the name of the define I'm looking for.


I don't recall this being available, but thought I'd ask. Happy to hear 
any suggestions!


Bill