Convert Xtext to Langium

Generator Fragment for MWE2 Workflow

This MWE2 fragment reads your Xtext grammar and converts it to Langium. If you are using a predefined Ecore model (not generated), it will also be converted to Langium as a type definition file.

How to consume

P2 Repository

Add the https://typefox.github.io/xtext2langium/download/updates/v0.4.0/ update site to your .target file as an additional location.

<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
   <unit id="io.typefox.xtext2langium" version="0.0.0"/>
   <repository location="https://typefox.github.io/xtext2langium/download/updates/v0.4.0/"/>
</location>

Maven

<dependency>
    <groupId>io.typefox.xtext2langium</groupId>
    <artifactId>io.typefox.xtext2langium</artifactId>
    <version>0.4.0</version>
</dependency>

Gradle

io.typefox.xtext2langium:io.typefox.xtext2langium:0.4.0

How to use

Add the fragment to you Language configuration in the MWE2 file and configure the output path.

language = StandardLanguage {
    name = "io.typefox.Example"
    // ... //

    fragment = io.typefox.xtext2langium.Xtext2LangiumFragment {
        outputPath = './langium'
    }

After running the workflow you will find the generated Langium output in ./langium folder.

Fragment options

• outputPath - Target output folder
• prefixEnumLiterals - If true, enum literal types will be prefixed with the enum type name to avoid name conflicts with other enum literals. Default is true. Example: enum Color: RED; will create: Color returns Color: Color_RED; Color_RED returns string: 'RED';
• useStringAsEnumRuleType - If true, Enum types will be handled as strings. Only relevant for generated metamodels. Default is false.
• generateEcoreTypes - If true, types from the Ecore metamodel will also be generated. If false, ecore data types will be replaced with Langium data types. Types that are not convertible to Langium built in types will be generated as string. Default is false.
• removeOverridenRules - In case a rule from the imported grammar was overwritten, Langium will report a duplicate error. If true, the super grammar rules will be skipped in favour of the current grammar rules. Default is false.