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2009
Springer

Parsing C/C++ Code without Pre-processing

9 years 4 months ago
Parsing C/C++ Code without Pre-processing
Abstract. It is difficult to develop style-preserving source-to-source transformation engines for C and C++. The main reason is not the complexity of those languages, but the use of the C pre-processor (cpp), especially ifdefs and macros. This has for example hindered the development of refactoring tools for C and C++. In this paper we propose to combine multiple techniques and heuristics to parse C/C++ source files as-is, while still having only a few modifications to the original grammars of C and C++. We rely on the fact that in most C and C++ software, programmers follow a limited number of conventions on the use of cpp which makes it possible to disambiguate different situations by just looking at the context, names, or indentation of cpp constructs. We have implemented a parser, Yacfe, based on these techniques and evaluated it on 16 large open source projects. Yacfe can on average parse 96% of those projects correctly. As a side effect, we also found mistakes in code that wa...
Yoann Padioleau
Added 24 Jul 2010
Updated 24 Jul 2010
Type Conference
Year 2009
Where CC
Authors Yoann Padioleau
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