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Example 1 with DataTypeDecl

use of org.abs_models.frontend.ast.DataTypeDecl in project abstools by abstools.

the class Main method rewriteModel.

/**
 * Perform various rewrites that cannot be done in JastAdd.
 *
 * JastAdd rewrite rules can only rewrite the current node using
 * node-local information.  ("The code in the body of the rewrite may
 * access and rearrange the nodes in the subtree rooted at A, but not any
 * other nodes in the AST. Furthermore, the code may not have any other
 * side effects." --
 * http://jastadd.org/web/documentation/reference-manual.php#Rewrites)
 *
 * We use this method to generate Exception constructors and the
 * information in ABS.Productline.
 *
 * @param m the model.
 * @param productname The name of the product or null.
 * @throws WrongProgramArgumentException
 */
private static void rewriteModel(Model m, String productname) throws WrongProgramArgumentException {
    // Generate reflective constructors for all features
    ProductLine pl = m.getProductLine();
    if (pl != null) {
        // Let's assume the module and datatype names in abslang.abs did
        // not get changed, and just crash otherwise.  If you're here
        // because of a NPE: Hi!  Make the standard library and this code
        // agree about what the feature reflection module is called.
        ModuleDecl modProductline = null;
        DataTypeDecl featureDecl = null;
        FunctionDecl currentFeatureFun = null;
        FunctionDecl productNameFun = null;
        for (ModuleDecl d : m.getModuleDecls()) {
            if (d.getName().equals(Constants.PL_NAME)) {
                modProductline = d;
                break;
            }
        }
        if (modProductline == null) {
            throw new WrongProgramArgumentException("Internal error: did not find module " + Constants.PL_NAME + "(should have been defined in the abslang.abs standard library)");
        }
        for (Decl d : modProductline.getDecls()) {
            if (d instanceof DataTypeDecl && d.getName().equals("Feature")) {
                featureDecl = (DataTypeDecl) d;
            } else if (d instanceof FunctionDecl && d.getName().equals("product_features")) {
                currentFeatureFun = (FunctionDecl) d;
            } else if (d instanceof FunctionDecl && d.getName().equals("product_name")) {
                productNameFun = (FunctionDecl) d;
            }
        }
        // Adjust Feature datatype
        featureDecl.setDataConstructorList(new List<>());
        for (Feature f : pl.getFeatures()) {
            // TODO: when/if we incorporate feature parameters into the
            // productline feature declarations (as we should), we need to
            // adjust the DataConstructor arguments here.
            featureDecl.addDataConstructorNoTransform(new DataConstructor(f.getName(), new List<>()));
        }
        // Adjust product_name() function
        productNameFun.setFunctionDef(new ExpFunctionDef(new StringLiteral(productname)));
        // Adjust product_features() function
        ProductDecl p = null;
        if (productname != null)
            p = m.findProduct(productname);
        if (p != null) {
            DataConstructorExp feature_arglist = new DataConstructorExp("Cons", new List<>());
            DataConstructorExp current = feature_arglist;
            for (Feature f : p.getProduct().getFeatures()) {
                DataConstructorExp next = new DataConstructorExp("Cons", new List<>());
                // TODO: when/if we incorporate feature parameters into
                // the productline feature declarations (as we should), we
                // need to adjust the DataConstructorExp arguments here.
                current.addParamNoTransform(new DataConstructorExp(f.getName(), new List<>()));
                current.addParamNoTransform(next);
                current = next;
            }
            current.setConstructor("Nil");
            currentFeatureFun.setFunctionDef(new ExpFunctionDef(feature_arglist));
        }
    }
    m.flushTreeCache();
}
Also used : ProductDecl(org.abs_models.frontend.ast.ProductDecl) WrongProgramArgumentException(org.abs_models.common.WrongProgramArgumentException) ModuleDecl(org.abs_models.frontend.ast.ModuleDecl) FunctionDecl(org.abs_models.frontend.ast.FunctionDecl) Decl(org.abs_models.frontend.ast.Decl) DataTypeDecl(org.abs_models.frontend.ast.DataTypeDecl) ProductDecl(org.abs_models.frontend.ast.ProductDecl) DataConstructor(org.abs_models.frontend.ast.DataConstructor) Feature(org.abs_models.frontend.ast.Feature) FunctionDecl(org.abs_models.frontend.ast.FunctionDecl) DataConstructorExp(org.abs_models.frontend.ast.DataConstructorExp) StringLiteral(org.abs_models.frontend.ast.StringLiteral) ModuleDecl(org.abs_models.frontend.ast.ModuleDecl) SemanticConditionList(org.abs_models.frontend.analyser.SemanticConditionList) ArrayList(java.util.ArrayList) List(org.abs_models.frontend.ast.List) ProductLine(org.abs_models.frontend.ast.ProductLine) DataTypeDecl(org.abs_models.frontend.ast.DataTypeDecl) ExpFunctionDef(org.abs_models.frontend.ast.ExpFunctionDef)

Aggregations

ArrayList (java.util.ArrayList)1 WrongProgramArgumentException (org.abs_models.common.WrongProgramArgumentException)1 SemanticConditionList (org.abs_models.frontend.analyser.SemanticConditionList)1 DataConstructor (org.abs_models.frontend.ast.DataConstructor)1 DataConstructorExp (org.abs_models.frontend.ast.DataConstructorExp)1 DataTypeDecl (org.abs_models.frontend.ast.DataTypeDecl)1 Decl (org.abs_models.frontend.ast.Decl)1 ExpFunctionDef (org.abs_models.frontend.ast.ExpFunctionDef)1 Feature (org.abs_models.frontend.ast.Feature)1 FunctionDecl (org.abs_models.frontend.ast.FunctionDecl)1 List (org.abs_models.frontend.ast.List)1 ModuleDecl (org.abs_models.frontend.ast.ModuleDecl)1 ProductDecl (org.abs_models.frontend.ast.ProductDecl)1 ProductLine (org.abs_models.frontend.ast.ProductLine)1 StringLiteral (org.abs_models.frontend.ast.StringLiteral)1