ClaiR provides a mapping from the Eclipse CDT open C and C++ front-end to a Rascal M3 model for further processing. It can work with and without working from inside the Eclipse IDE.
You need Rascal, and Either Eclipse or VScode or the standalone Rascal jar:
- Eclipse 2019-06 or higher with our without the CDT tools (see here). With the CDT tools you have some more tools to access information from CPP projects (like include paths), but otherwise Clair functions the same.
- In Eclipse install the Rascal plugin from the update site: https://update.rascal-mpl.org/stable/
- Or, VScode with the Rascal extension
- Use the extension view in VScode to install Rascal
- Or, Rascal commandline (see here)
CAVEAT: currently both VScode and Eclipse Rascal releases have issues with Maven projects that depend on libraries such as clair. Please sit tight while we fix these.
- Create an empty project "myproject" in a folder named "myproject"
- In
META-INF/RASCAL.MF
addProject-Name: myproject
Source: src
and `Require-Libraries: |lib://clair| - In
pom.xml
add:
<dependency>
<groupId>org.rascalmpl</groupId>
<artifactId>clair</artifactId>
<version>0.3.0</version>
</dependency>
- And (optionally) add in
pom.xml
this to be able to runmvn rascal:console
and the Rascal compiler:
<plugins>
<plugin>
<groupId>org.rascalmpl</groupId>
<artifactId>rascal-maven-plugin</artifactId>
<version>0.7.3</version>
<configuration>
<bin>${project.build.outputDirectory}</bin>
<srcs>
<src>${project.basedir}/src</src>
</srcs>
</configuration>
<executions>
<execution>
<id>rascal-compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>rascal-package</id>
<phase>pre-package</phase>
<goals>
<goal>package</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
- note to skip running the Rascal compiler:
mvn compile -Drascal.compile.skip
- On the commandline, in your own project, run
mvn rascal:console
, or - In Eclipse's Project Explorer, right click a project's folder and select Rascal Console. The console should open inside Eclipse's terminal window with the title "Rascal [project: , mode: debug]". If, instead, it shows "project: none", make sure you clicked the project and the project is actually open.
- Or in VScode start a Rascal terminal from the command pallette, or from the "Start Rascal Terminal" action in an Rascal editor.
- Import ClaiR into the console by running
import lang::cpp::AST;
. - To parse a string containing source code, call the
parseString
function, e.g.,parseString("int foo() { return 0; }")
. - To parse source files on disk, call the
parseCpp
function with a source location, e.g.,parseCpp(|file:///tmp/example.cpp|)
,parseCpp(|project://clair/src/test/test.cpp|)
,parseCpp(|home://myFile.cpp|)
, orparseCpp(|file://C:/My%20Dir/main.cpp|)
.