antlr4-wrapper.xml

<!--
  ~ BSD-style license; for more info see http://pmd.sourceforge.net/license.html
  -->

<project name="pmd" default="adapt-antlr-sources" basedir="../../../../">

<!--    Input properties:
        - lang-name: matches the grammar name (eg "Swift")
        - lang-terse-name: uncapitalized package name (eg "swift")
        - node-prefix: prefix for generated AST nodes (eg "Sw")
        - root-node-name: name of the root node without prefix (eg "TopLevel"), will be made to implement RootNode

        See AntlrGeneratedParserBase

-->

    <property name="target-package-dir" value="${antlr4.outputDirectory}/net/sourceforge/pmd/lang/${lang-terse-name}/ast"/>


    <property name="lang-ast-package" value="net.sourceforge.pmd.lang.${lang-terse-name}.ast" />
    <property name="ast-api-package" value="net.sourceforge.pmd.lang.ast" />
    <property name="ast-impl-package" value="${ast-api-package}.impl.antlr4" />


    <property name="parser-name" value="${lang-name}Parser"/>
    <property name="parser-file" value="${target-package-dir}/${parser-name}.java"/>

    <property name="visitor-name" value="${lang-name}Visitor"/>
    <property name="visitor-file" value="${target-package-dir}/${visitor-name}.java"/>

    <property name="base-visitor-name" value="${lang-name}BaseVisitor"/>
    <property name="base-visitor-file" value="${target-package-dir}/${base-visitor-name}.java"/>

    <property name="listener-name" value="${lang-name}Listener"/>
    <property name="listener-file" value="${target-package-dir}/${visitor-name}.java"/>

    <property name="base-listener-name" value="${lang-name}BaseListener"/>
    <property name="base-listener-file" value="${target-package-dir}/${base-visitor-name}.java"/>

    <property name="node-itf-name" value="${lang-name}Node"/>
    <property name="base-class-name" value="Abstract${lang-name}Node"/>

    <condition property="rename-parser">
        <and>
            <not>
                <available file="${parser-file}"/>
            </not>
            <available file="${target-package-dir}/${lang-name}.java"/>
        </and>
    </condition>

    <target name="rename-parser" description="Rename the parser to our conventional name if needed"
            if="rename-parser">
        <replace file="${target-package-dir}/${lang-name}.java">
            <replacefilter token="class ${lang-name} "
                           value="class ${parser-name} "/>
            <replacefilter token="public ${lang-name}(TokenStream input)"
                           value="public ${parser-name}(TokenStream input)"/>
        </replace>
        <replace dir="${target-package-dir}">
            <include name="${lang-name}.java"/>
            <include name="${visitor-name}.java"/>
            <include name="${base-visitor-name}.java"/>
            <include name="${listener-name}.java"/>
            <include name="${base-listener-name}.java"/>
            <replacefilter token="${lang-name}." value="${parser-name}."/>
        </replace>

        <move file="${target-package-dir}/${lang-name}.java"
              tofile="${parser-file}"/>
    </target>

    <target name="cpd-language" description="Adapt Antlr sources for CPD-only languages">
        <!-- We only need the Lexer file. -->
        <delete file="${parser-file}"/>
        <delete>
            <fileset dir="${target-package-dir}">
                <include name="*"/>
                <exclude name="*Lexer.java"/>
            </fileset>
        </delete>
    </target>

    <target name="pmd-language" description="Adapt Antlr sources for PMD languages" depends="rename-parser">

        <!-- Adapt parser. -->
        <replace file="${parser-file}">
            <replacefilter token="${root-node-name}Context extends ${lang-name}InnerNode"
                           value="${root-node-name}Context extends ${lang-name}RootNode"/>

            <replacefilter token="_ctx = _localctx;"
                           value="_ctx = _localctx.asAntlrNode();"/>

            <replacefilter token="public &lt;T> T accept(ParseTreeVisitor&lt;? extends T> visitor)"
                           value="public &lt;P, R> R acceptVisitor(AstVisitor&lt;? super P, ? extends R> visitor, P data)" />

            <replacefilter token="((${visitor-name}&lt;? extends T>)visitor)"
                           value="((${visitor-name}&lt;? super P, ? extends R>) visitor)" />

            <replacefilter token="return visitor.visitChildren(this);"
                           value="return super.acceptVisitor(visitor, data);" />

        </replace>

        <replaceregexp flags="g" file="${parser-file}">
            <regexp pattern="\.visit(\w++)\(this\);"/>
            <substitution expression=".visit\1(this, data);"/>
        </replaceregexp>

        <replaceregexp flags="g" file="${parser-file}">
            <regexp pattern="_sempred\(\((\w+)\)_localctx,"/>
            <substitution expression="_sempred\((\1) asPmdNode(_localctx),"/>
        </replaceregexp>

        <!-- Transform the visitor to PMD-style. -->
        <replace file="${visitor-file}">

            <replacefilter token="Visitor&lt;T> extends ParseTreeVisitor&lt;T> {"
                           value="Visitor&lt;P, R> extends net.sourceforge.pmd.lang.ast.AstVisitor&lt;P, R> {&#10;
&#10;
    /**&#10;
     * The default visit method for ${lang-name} nodes. Unless overridden,&#10;
     * the default implementations of the methods of this interface delegate&#10;
     * to this method. The default calls {@link #visitNode(Node, Object)}.&#10;
     * &#10;
     * @param node Node to visit&#10;
     * @param data Parameter of the visit&#10;
     * @return Result of the visit&#10;
     */&#10;
     default R visit${node-itf-name}(${node-itf-name} node, P data) { return visitNode(node, data); }&#10;&#10;
&#10;
"/>

            <replacefilter token="T visit" value="default R visit"/>
            <replacefilter token="ctx);" value="node, P data) { return visit${node-itf-name}(node, data); }"/>

        </replace>

        <!-- This is in the main sources (not much to do). -->
        <delete file="${base-visitor-file}" />


        <replaceregexp flags="g">
            <fileset dir="${target-package-dir}" />
            <regexp pattern="\b([A-Z]\w*)Context\b(?&lt;!\b(Parser)?RuleContext\b)"/>
            <substitution expression="${node-prefix}\1"/>
        </replaceregexp>


    </target>
</project>