C# Project Settings for ANTLR 3
Now let’s see how to use ANTLR 3 in a C# project by analyzing SharpSnmpLib.AST.csproj in #SNMP,
The above lines (75–79) use ANTLR MSBuild tasks. The PropertyGroup tag sets two paths: the first is the folder that contains AntlrBuildTask.dll; the second is the path for Antlr3.exe. The Import tag tells MSBuild engine that this extra .targets file needs to be loaded.
This C# project contains two ANTLR grammar files,
1 2 <Antlr3 Include="Mib\Smi.g" /> <None Include="Mib\Smi_no_action.g" />
The Antlr3 tag means Smi.g is the grammar file that needs to be converted to C# code by Antlr3.exe. Under DEBUG mode, the converted C# files will locate in obj folder.
The None tag means Smi_no_action.g is not in use. About why it is not in use, I will describe later.
You might notice that this project does add Antlr3 C# runtime as a reference,
1 2 3 4 <Reference Include="Antlr3.Runtime, Version=220.127.116.1104, Culture=neutral, PublicKeyToken=eb42632606e9261f, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>..\packages\Antlr.Unofficial.18.104.22.168\lib\Antlr3.Runtime.dll</HintPath> </Reference>
In this project I use the ANTLR 3 NuGet package. If you don’t want to use NuGet, you can simply add lib\ANTLR\Antlr3.Runtime.dll instead.
OK. After analyzing this project I think you know how to add a grammar file to your C# project, and then configure related project level settings properly. In next post I am going to document what you need to pay attention to at code level. #SNMP will still be our example.