How to get a standard C compiler with preprocessor through ANTLR?

[song...@gmail.com]

Thanks for the answers of my last question.

But I still confuse about how to get a standard C compiler by using ANTLR.

I already have the C preprocessor and C parser grammar downloaded from the

antlr3 official website. Trying to combine them to get a full c compiler.

From what I learn these days, I found two ways to do this:

1. Rewrite the C parser grammar based on C preprocessor output file.

    (I found someone get this done by writing a C parser based on the .i file created 

     by gcc using gcc -E command.) 

2. "Combine the preprocessing engine with a lexer."

     https://www.ibm.com/developerworks/aix/library/au-c_plusplus_antlr/index.html

      This way seems to separate the preprocessor and parser in logic, but combine

      together in ANTLR.

I am planing to try both for learning. Can someone give me more details or advices?

For the first way I am stuck on how to get C preprocessor output as the output file created by antlr

just can recognize the input.

Should I add some ANTLR action or write a tree grammar in ANTLR to create an output file, And then

 the rewrite the C parser grammar to parser the output file?

 

For the second way seem I need to write a Lexer grammar which combine the C preprocessor, and then write a parser

for it. That means I should rewrite all the grammar, it will be a huge work to me.

[Mike Lischke]

Thanks for the answers of my last question.

But I still confuse about how to get a standard C compiler by using ANTLR.

I already have the C preprocessor and C parser grammar downloaded from the

antlr3 official website. Trying to combine them to get a full c compiler.

From what I learn these days, I found two ways to do this:

1. Rewrite the C parser grammar based on C preprocessor output file.

    (I found someone get this done by writing a C parser based on the .i file created 

     by gcc using gcc -E command.) 

2. "Combine the preprocessing engine with a lexer."

OK, then let me throw in again my solution: http://www.soft-gems.net/index.php/java/windows-resource-file-parser-and-converter, which is per se made for .rc files, but .rc and .h files are very similar wrt to preprocessing (e.g. can include other files, have to support preprocessor syntax etc.). It's an older solution (for ANTLR 2.7) but you might find the approach interesting. I used a custom  reader to handle preprocessor stuff which then delivers only the active text parts to the lexer.

Mike
-- 
www.soft-gems.net

[song...@gmail.com]

Thanks Mike!