Examples with BlockStmt kalang.ast.BlockStmt used on opensource projects

Example 16 with BlockStmt

use of kalang.ast.BlockStmt in project kalang by kasonyang.

the class AstBuilder method visitTryStat.

@Override
public AstNode visitTryStat(TryStatContext ctx) {
    // TODO handle multi-branched assign
    BlockStmt tryExecStmt = requireBlock(ctx.exec);
    boolean tryReturned = this.returned;
    List<CatchBlock> tryCatchBlocks = new LinkedList<>();
    if (ctx.catchTypes != null) {
        for (int i = 0; i < ctx.catchTypes.size(); i++) {
            this.newFrame();
            this.returned = false;
            String vName = ctx.catchVarNames.get(i).getText();
            String vType = ctx.catchTypes.get(i).getText();
            LocalVarNode vo = this.declareLocalVar(vName, requireClassType(vType, ctx.catchTypes.get(i).start), Modifier.FINAL, ctx);
            if (vo == null)
                return null;
            BlockStmt catchExecStmt = requireBlock(ctx.catchExec.get(i));
            CatchBlock catchStmt = new CatchBlock(vo, catchExecStmt);
            tryCatchBlocks.add(catchStmt);
            this.returned = this.returned && tryReturned;
            this.popFrame();
        }
    }
    BlockStmt tryFinallyStmt = null;
    if (ctx.finallyExec != null) {
        tryFinallyStmt = requireBlock(ctx.finallyExec);
    }
    TryStmt tryStmt = new TryStmt(tryExecStmt, tryCatchBlocks, tryFinallyStmt);
    mapAst(tryStmt, ctx);
    return tryStmt;
}

Example 17 with BlockStmt

use of kalang.ast.BlockStmt in project kalang by kasonyang.

the class AstBuilder method requireBlock.

private BlockStmt requireBlock(ParserRuleContext stmt) {
    if (stmt instanceof BlockStmtContext) {
        return (BlockStmt) visit(stmt);
    } else {
        BlockStmt bs = newBlock();
        bs.statements.add((Statement) visit(stmt));
        popBlock();
        return bs;
    }
}

Example 18 with BlockStmt

use of kalang.ast.BlockStmt in project kalang by kasonyang.

the class AstBuilder method visitAssertStmt.

@Override
public Object visitAssertStmt(KalangParser.AssertStmtContext ctx) {
    ExprNode failExpr = visitExpression(ctx.testCondition);
    if (failExpr == null)
        return null;
    failExpr = BoxUtil.assign(failExpr, failExpr.getType(), Types.BOOLEAN_TYPE);
    if (failExpr == null) {
        this.diagnosisReporter.report(Diagnosis.Kind.ERROR, "boolean type expected", ctx.testCondition);
        return null;
    }
    failExpr = new UnaryExpr(failExpr, UnaryExpr.OPERATION_LOGIC_NOT);
    ExprNode failMsgExpr = null;
    if (ctx.failMessage != null) {
        failMsgExpr = visitExpression(ctx.failMessage);
        if (failMsgExpr == null)
            return null;
        if (Types.VOID_TYPE.equals(failMsgExpr.getType())) {
            this.diagnosisReporter.report(Diagnosis.Kind.ERROR, "non-void type expected", ctx.failMessage);
            return null;
        }
    }
    BlockStmt body = this.newBlock();
    NewObjectExpr newErrorExpr;
    try {
        newErrorExpr = new NewObjectExpr(Types.requireAssertionErrorClassType(), failMsgExpr != null ? new ExprNode[] { failMsgExpr } : new ExprNode[0]);
    } catch (MethodNotFoundException | AmbiguousMethodException ex) {
        throw Exceptions.unexceptedException(ex);
    }
    body.statements.add(new ThrowStmt(newErrorExpr));
    popBlock();
    return new IfStmt(failExpr, body, null);
}

Example 19 with BlockStmt

use of kalang.ast.BlockStmt in project kalang by kasonyang.

the class AstUtil method createGetter.

public static void createGetter(ClassNode clazz, FieldDescriptor field, int accessModifier) {
    String fn = field.getName();
    String getterName = "get" + NameUtil.firstCharToUpperCase(fn);
    boolean isStatic = isStatic(field.getModifier());
    if (isStatic) {
        accessModifier |= Modifier.STATIC;
    }
    MethodNode getter = clazz.createMethodNode(field.getType(), getterName, accessModifier);
    // getter.offset = field.offset;
    BlockStmt body = getter.getBody();
    FieldExpr fe;
    ClassReference cr = new ClassReference(clazz);
    if (isStatic) {
        fe = new StaticFieldExpr(cr, field);
    } else {
        fe = new ObjectFieldExpr(new ThisExpr(Types.getClassType(clazz)), field);
    }
    body.statements.add(new ReturnStmt(fe));
}

Example 20 with BlockStmt

use of kalang.ast.BlockStmt in project kalang by kasonyang.

the class AstUtil method createScriptMainMethodIfNotExists.

public static void createScriptMainMethodIfNotExists(ClassNode clazz) {
    ClassType clazzType = Types.getClassType(clazz);
    MethodDescriptor[] methods = clazzType.getMethodDescriptors(null, false, false);
    Type[] argTypes = new Type[] { Types.getArrayType(Types.getStringClassType()) };
    MethodDescriptor mainMethod = MethodUtil.getMethodDescriptor(methods, "main", argTypes);
    if (mainMethod == null) {
        MethodNode m = clazz.createMethodNode(Types.VOID_TYPE, "main", Modifier.PUBLIC + Modifier.STATIC);
        ParameterNode p = m.createParameter(argTypes[0], "arg");
        BlockStmt body = m.getBody();
        try {
            NewObjectExpr newScriptExpr = new NewObjectExpr(clazzType);
            ObjectInvokeExpr invokeExpr = ObjectInvokeExpr.create(newScriptExpr, "run", new ExprNode[] { new ParameterExpr(p) });
            body.statements.add(new ExprStmt(invokeExpr));
        } catch (MethodNotFoundException | AmbiguousMethodException ex) {
            throw Exceptions.unexceptedException(ex);
        }
    }
}