A Free Tool to Check C/C++ Source Code Against a Set of Coding Standards

A free tool to check C/C++ source code against a set of coding standards?

The only tool I know is Vera. Haven't used it, though, so can't comment how viable it is. ~~Demo looks promising.~~

What tools exist for comparing C++ code to coding guidelines?

The full list that I managed to generate:

PRQA's QA C++
Parasoft's C++Test
MS Visual Studio Team System seems to have some functionality but it's hard to tell via their website.
GrammaTech CodeSonar
Coverity Extend

The last two provide some functionality but not particularly customisable ones:

Klocwork Insight
Rational PurifyPlus

What open source C++ static analysis tools are available?

Oink is a tool built on top of the Elsa C++ front-end. Mozilla's Pork is a fork of Elsa/Oink.

See: http://danielwilkerson.com/oink/index.html

Coding style checker for C

The traditional beautifier indent, available on every Unix machine. The version found on some is GNU indent, which can be compiled and installed on every machine. GNU indent can read a set of rules from the file ~/.indent.pro, for instance:

--original --dont-format-first-column-comments --no-blank-lines-after-commas --parameter-indentation 8 --indent-level 8 --line-length 85 --no-space-after-parentheses --no-comment-delimiters-on-blank-lines

So, just running indent before commiting guarantees uniformity of the presentation. If you want to enforce it, define a pre-commit hook in the Version Control System you use, which will run indent and refuse the commit if the committed version differs from what indent produces.

Is there a style checker for c++?

What about Vera++ ?

Vera++ is a programmable tool for verification, analysis and transformation of C++ source code.
Vera++ is mainly an engine that parses C++ source files and presents the result of this parsing to scripts in the form of various collections - the scripts are actually performing the requested tasks.

Click here to see a more complete demo of what it can do.

crc.hpp:157: keyword 'explicit' not followed by a single space
crc.hpp:588: closing curly bracket not in the same line or column
dynamic_property_map.hpp:82: keyword 'if' not followed by a single space
functional.hpp:106: line is longer than 100 characters
multi_index_container.hpp:472: comma should be followed by whitespace
version.hpp:37: too many consecutive empty lines
weak_ptr.hpp:108: keyword 'catch' not followed by a single space
...