Examples with Expression org.eclipse.ceylon.compiler.typechecker.tree.Tree.Expression used on opensource projects

Example 11 with Expression

use of org.eclipse.ceylon.compiler.typechecker.tree.Tree.Expression in project ceylon by eclipse.

the class StatementTransformer method makeThenBlock.

private JCBlock makeThenBlock(Cond cond, Node thenPart, Substitution subs, String tmpVar, Tree.Term outerExpression, Type expectedType) {
    List<JCStatement> blockStmts;
    if (thenPart instanceof Tree.Block)
        blockStmts = statementGen().transformBlock((Tree.Block) thenPart);
    else if (thenPart instanceof Tree.Expression) {
        blockStmts = evaluateAndAssign(tmpVar, (Tree.Expression) thenPart, outerExpression, expectedType);
    } else if (thenPart == null) {
        blockStmts = List.<JCStatement>nil();
    } else {
        blockStmts = List.<JCStatement>of(make().Exec(makeErroneous(thenPart, "Only block or expression allowed")));
    }
    if (subs != null) {
        // The variable holding the result for the code inside the code block
        blockStmts = blockStmts.prepend(at(cond.getCondition()).VarDef(make().Modifiers(FINAL), names().fromString(subs.substituted), cond.getVarTrans().makeTypeExpr(), cond.getVarTrans().makeResultExpr()));
    }
    JCBlock thenBlock = at(cond.getCondition()).Block(0, blockStmts);
    return thenBlock;
}

Example 12 with Expression

use of org.eclipse.ceylon.compiler.typechecker.tree.Tree.Expression in project ceylon by eclipse.

the class StatementTransformer method transformVariableOrDestructure.

public List<JCStatement> transformVariableOrDestructure(Tree.Statement varOrDes) {
    List<JCStatement> vars = List.<JCStatement>nil();
    if (varOrDes instanceof Tree.Variable) {
        Tree.Variable var = (Tree.Variable) varOrDes;
        Expression expr = var.getSpecifierExpression().getExpression();
        BoxingStrategy boxingStrategy = CodegenUtil.getBoxingStrategy(var.getDeclarationModel());
        JCExpression init = expressionGen().transformExpression(expr, boxingStrategy, var.getType().getTypeModel());
        vars = vars.append(transformVariable(var, init, expr.getTypeModel(), boxingStrategy == BoxingStrategy.BOXED).build());
    } else if (varOrDes instanceof Tree.Destructure) {
        Tree.Destructure des = (Tree.Destructure) varOrDes;
        vars = vars.appendList(transform(des));
    } else {
        throw BugException.unhandledNodeCase(varOrDes);
    }
    return vars;
}

Example 13 with Expression

use of org.eclipse.ceylon.compiler.typechecker.tree.Tree.Expression in project ceylon by eclipse.

the class StatementTransformer method transform.

public JCStatement transform(Tree.TryCatchStatement t) {
    Tree.TryClause tryClause = t.getTryClause();
    at(tryClause);
    JCBlock tryBlock = transform(tryClause.getBlock());
    Tree.ResourceList resList = tryClause.getResourceList();
    if (resList != null) {
        ArrayList<Tree.Resource> resources = new ArrayList<Tree.Resource>(resList.getResources());
        Collections.reverse(resources);
        for (Tree.Resource res : resources) {
            List<JCStatement> stats = List.nil();
            Tree.Expression resExpr;
            String resVarName;
            if (res.getExpression() != null) {
                resExpr = res.getExpression();
                resVarName = naming.newTemp("try");
            } else if (res.getVariable() != null) {
                Tree.Variable var = res.getVariable();
                resExpr = var.getSpecifierExpression().getExpression();
                resVarName = var.getIdentifier().getText();
            } else {
                throw new BugException(res, "missing resource expression");
            }
            final TryResourceTransformation resourceTx;
            if (typeFact().getDestroyableType().isSupertypeOf(resExpr.getTypeModel())) {
                resourceTx = destroyableResource;
            } else if (typeFact().getObtainableType().isSupertypeOf(resExpr.getTypeModel())) {
                resourceTx = obtainableResource;
            } else if (javacJavaTypeToProducedType(syms().autoCloseableType).isSupertypeOf(resExpr.getTypeModel())) {
                resourceTx = javaAutoCloseableResource;
            } else {
                throw BugException.unhandledTypeCase(resExpr.getTypeModel());
            }
            Type resVarType = resExpr.getTypeModel();
            Type resVarExpectedType = resourceTx.getType();
            // CloseableType $var = resource-expression
            JCExpression expr = expressionGen().transformExpression(resExpr);
            JCExpression javaType = makeJavaType(resVarType);
            JCVariableDecl var = makeVar(FINAL, resVarName, javaType, expr);
            stats = stats.append(var);
            if (resourceTx.getInitMethodName() != null) {
                JCExpression resVar0 = expressionGen().applyErasureAndBoxing(makeUnquotedIdent(resVarName), resVarType, true, BoxingStrategy.BOXED, resVarExpectedType);
                JCMethodInvocation openCall = make().Apply(null, makeQualIdent(resVar0, resourceTx.getInitMethodName()), List.<JCExpression>nil());
                stats = stats.append(make().Exec(openCall));
            }
            // Exception $tpmex = null;
            String innerExTmpVarName = naming.newTemp("ex");
            JCExpression innerExType = makeJavaType(typeFact().getThrowableType(), JT_CATCH);
            JCVariableDecl innerExTmpVar = makeVar(innerExTmpVarName, innerExType, makeNull());
            stats = stats.append(innerExTmpVar);
            // $tmpex = ex;
            List<JCStatement> innerCatchStats = List.nil();
            Name innerCatchVarName = naming.tempName("ex");
            JCAssign exTmpAssign = make().Assign(makeUnquotedIdent(innerExTmpVarName), make().Ident(innerCatchVarName));
            innerCatchStats = innerCatchStats.append(make().Exec(exTmpAssign));
            // throw ex;
            JCThrow innerCatchThrow = make().Throw(make().Ident(innerCatchVarName));
            innerCatchStats = innerCatchStats.append(innerCatchThrow);
            JCBlock innerCatchBlock = make().Block(0, innerCatchStats);
            // $var.close() /// ((Closeable)$var).close()
            JCExpression exarg = makeUnquotedIdent(innerExTmpVarName);
            JCExpression resVar1 = expressionGen().applyErasureAndBoxing(makeUnquotedIdent(resVarName), resVarType, true, BoxingStrategy.BOXED, resVarExpectedType);
            JCExpression closeCall = resourceTx.makeRecover(resVar1, exarg);
            JCBlock closeTryBlock = make().Block(0, List.<JCStatement>of(make().Exec(closeCall)));
            // try { $var.close() } catch (Exception closex) { $tmpex.addSuppressed(closex); }
            Name closeCatchVarName = naming.tempName("closex");
            JCExpression closeCatchExType = makeJavaType(typeFact().getThrowableType(), JT_CATCH);
            JCVariableDecl closeCatchVar = make().VarDef(make().Modifiers(Flags.FINAL), closeCatchVarName, closeCatchExType, null);
            JCExpression addarg = make().Ident(closeCatchVarName);
            JCMethodInvocation addSuppressedCall = make().Apply(null, makeQualIdent(makeUnquotedIdent(innerExTmpVarName), "addSuppressed"), List.<JCExpression>of(addarg));
            JCStatement catchForClose;
            if (resourceTx != javaAutoCloseableResource) {
                // Obtainable.release() and Destroyable.close() could
                // rethrow the originating exception, so guard against
                // self-supression (which causes addSuppressed() to throw
                catchForClose = make().If(make().Binary(JCTree.Tag.NE, makeUnquotedIdent(innerExTmpVarName), make().Ident(closeCatchVarName)), make().Block(0, List.<JCStatement>of(make().Exec(addSuppressedCall))), null);
            } else {
                // AutoClosable can't rethrow the originating exception,
                // so no need to worry about self suppression
                catchForClose = make().Exec(addSuppressedCall);
            }
            JCCatch closeCatch = make().Catch(closeCatchVar, make().Block(0, List.<JCStatement>of(catchForClose)));
            JCTry closeTry = at(res).Try(closeTryBlock, List.<JCCatch>of(closeCatch), null);
            // $var.close() /// ((Closeable)$var).close()
            JCExpression exarg2 = makeUnquotedIdent(innerExTmpVarName);
            JCExpression resVar2 = expressionGen().applyErasureAndBoxing(makeUnquotedIdent(resVarName), resVarType, true, BoxingStrategy.BOXED, resVarExpectedType);
            JCExpression closeCall2 = resourceTx.makeRecover(resVar1, exarg);
            // if ($tmpex != null) { ... } else { ... }
            JCBinary closeCatchCond = make().Binary(JCTree.Tag.NE, makeUnquotedIdent(innerExTmpVarName), makeNull());
            JCIf closeCatchIf = make().If(closeCatchCond, make().Block(0, List.<JCStatement>of(closeTry)), make().Block(0, List.<JCStatement>of(make().Exec(closeCall2))));
            // try { .... } catch (Exception ex) { $tmpex=ex; throw ex; }
            // finally { try { $var.close() } catch (Exception closex) { } }
            JCExpression innerCatchExType = makeJavaType(typeFact().getThrowableType(), JT_CATCH);
            JCVariableDecl innerCatchVar = make().VarDef(make().Modifiers(Flags.FINAL), innerCatchVarName, innerCatchExType, null);
            JCCatch innerCatch = make().Catch(innerCatchVar, innerCatchBlock);
            JCBlock innerFinallyBlock = make().Block(0, List.<JCStatement>of(closeCatchIf));
            JCTry innerTry = at(res).Try(tryBlock, List.<JCCatch>of(innerCatch), innerFinallyBlock);
            stats = stats.append(innerTry);
            tryBlock = at(res).Block(0, stats);
        }
    }
    final List<JCCatch> catches;
    if (usePolymorphicCatches(t.getCatchClauses())) {
        catches = transformCatchesPolymorphic(t.getCatchClauses());
    } else {
        catches = transformCatchesIfElseIf(t.getCatchClauses());
    }
    final JCBlock finallyBlock;
    Tree.FinallyClause finallyClause = t.getFinallyClause();
    if (finallyClause != null) {
        at(finallyClause);
        finallyBlock = transform(finallyClause.getBlock());
    } else {
        finallyBlock = null;
    }
    if (!catches.isEmpty() || finallyBlock != null) {
        return at(t).Try(tryBlock, catches, finallyBlock);
    } else {
        return tryBlock;
    }
}

Example 14 with Expression

use of org.eclipse.ceylon.compiler.typechecker.tree.Tree.Expression in project ceylon by eclipse.

the class ExpressionTransformer method transformSpreadArgument.

private ExpressionAndType transformSpreadArgument(SimpleInvocation invocation, int numArguments, int argIndex, BoxingStrategy boxingStrategy, Type parameterType) {
    ExpressionAndType exprAndType;
    final Type iteratedType = typeFact().getIteratedType(parameterType);
    final JCExpression expr;
    final JCExpression type;
    // optimise "*javaArray.iterable" into "javaArray" for java variadic parameters, since we can pass them just along
    if (invocation.isJavaVariadicMethod() && numArguments == argIndex + 1 && !invocation.isArgumentComprehension(argIndex)) {
        Expression argumentExpression = invocation.getArgumentExpression(argIndex);
        Term argument = Decl.unwrapExpressionsUntilTerm(argumentExpression);
        if (argument instanceof Tree.QualifiedMemberExpression) {
            Tree.QualifiedMemberExpression qualifiedMemberArgument = (Tree.QualifiedMemberExpression) argument;
            if ("iterable".equals(qualifiedMemberArgument.getIdentifier().getText()) && isJavaArray(qualifiedMemberArgument.getPrimary().getTypeModel())) {
                // just pass the array as-is
                // we don't care at all about unboxing or casting since we can't be dealing with boxing
                // and we generate our own cast, at least for non-primitive arrays where it may be ambiguous,
                // we could avoid the cast for non-type-parameter and non-Object arrays, but that's more expensive
                // to check for
                JCExpression primary = transformExpression(qualifiedMemberArgument.getPrimary());
                type = makeJavaType(typeFact().getSequenceType(iteratedType).getType());
                if (isJavaObjectArray(qualifiedMemberArgument.getPrimary().getTypeModel())) {
                    expr = make().TypeCast(makeJavaType(qualifiedMemberArgument.getPrimary().getTypeModel()), primary);
                } else {
                    expr = primary;
                }
                return new ExpressionAndType(expr, type);
            }
        }
    }
    // invoking f(a, *b), where declared f(A a, B* b)
    // we can have several remaining arguments and the last one is spread
    List<JCExpression> x = List.<JCExpression>nil();
    for (int ii = argIndex; ii < numArguments; ii++) {
        JCExpression argExpr = invocation.getTransformedArgumentExpression(ii);
        // the last parameter is spread and must be put first
        if (ii < numArguments - 1) {
            x = x.append(argExpr);
        } else {
            // convert to a Sequential if required
            Type argType = invocation.getArgumentType(ii);
            if (typeFact().isJavaArrayType(argType)) {
                String methodName;
                if (typeFact().getJavaIntArrayDeclaration().equals(argType.getDeclaration())) {
                    methodName = "org.eclipse.ceylon.compiler.java.language.IntArray.getIterable";
                } else if (typeFact().getJavaShortArrayDeclaration().equals(argType.getDeclaration())) {
                    methodName = "org.eclipse.ceylon.compiler.java.language.ShortArray.getIterable";
                } else if (typeFact().getJavaLongArrayDeclaration().equals(argType.getDeclaration())) {
                    methodName = "org.eclipse.ceylon.compiler.java.language.LongArray.getIterable";
                } else if (typeFact().getJavaByteArrayDeclaration().equals(argType.getDeclaration())) {
                    methodName = "org.eclipse.ceylon.compiler.java.language.ByteArray.getIterable";
                } else if (typeFact().getJavaBooleanArrayDeclaration().equals(argType.getDeclaration())) {
                    methodName = "org.eclipse.ceylon.compiler.java.language.BooleanArray.getIterable";
                } else if (typeFact().getJavaCharArrayDeclaration().equals(argType.getDeclaration())) {
                    methodName = "org.eclipse.ceylon.compiler.java.language.CharArray.getIterable";
                } else if (typeFact().getJavaFloatArrayDeclaration().equals(argType.getDeclaration())) {
                    methodName = "org.eclipse.ceylon.compiler.java.language.FloatArray.getIterable";
                } else if (typeFact().getJavaDoubleArrayDeclaration().equals(argType.getDeclaration())) {
                    methodName = "org.eclipse.ceylon.compiler.java.language.DoubleArray.getIterable";
                } else {
                    methodName = "org.eclipse.ceylon.compiler.java.language.ObjectArray.getIterable";
                }
                argExpr = make().Apply(null, naming.makeQuotedQualIdentFromString(methodName), List.<JCExpression>of(argExpr));
                argExpr = iterableToSequential(argExpr);
            } else if (typeFact().isSequentialType(argType)) {
            // we're good
            } else if (typeFact().isIterableType(argType)) {
                argExpr = iterableToSequential(argExpr);
            } else if (typeFact().isJavaIterableType(argType)) {
                argExpr = utilInvocation().toIterable(makeJavaType(iteratedType, JT_TYPE_ARGUMENT), makeReifiedTypeArgument(iteratedType), argExpr);
                argExpr = iterableToSequential(argExpr);
            }
            x = x.prepend(argExpr);
        }
    }
    if (invocation.isJavaVariadicMethod()) {
        // collect all the initial arguments and wrap into a Java array
        // first arg is the spread part
        JCExpression last = x.head;
        // remove it from x
        x = x.tail;
        Type lastType = invocation.getArgumentType(numArguments - 1);
        // must translate it into a Util call
        expr = sequenceToJavaArray(invocation, last, parameterType, boxingStrategy, lastType, x);
    } else {
        JCExpression typeExpr = makeJavaType(iteratedType, JT_TYPE_ARGUMENT);
        JCExpression sequentialExpr = utilInvocation().sequentialInstance(typeExpr, makeReifiedTypeArgument(iteratedType), x.head, x.tail);
        if (invocation.isParameterVariadicPlus(argIndex)) {
            expr = utilInvocation().castSequentialToSequence(sequentialExpr, iteratedType);
        } else {
            expr = sequentialExpr;
        }
    }
    type = makeJavaType(typeFact().getSequenceType(iteratedType).getType());
    exprAndType = new ExpressionAndType(expr, type);
    return exprAndType;
}

Example 15 with Expression

use of org.eclipse.ceylon.compiler.typechecker.tree.Tree.Expression in project ceylon by eclipse.

the class BoxingVisitor method visit.

@Override
public void visit(Tree.SwitchExpression that) {
    super.visit(that);
    SwitchCaseList caseList = that.getSwitchCaseList();
    if (caseList == null || caseList.getCaseClauses() == null)
        return;
    boolean unboxed = true;
    for (Tree.CaseClause caseClause : caseList.getCaseClauses()) {
        Expression expr = caseClause.getExpression();
        if (expr == null)
            return;
        // a single boxed one makes the whole switch boxed
        if (!CodegenUtil.isUnBoxed(expr))
            unboxed = false;
    // A Switch expression can never be raw, type erased or untrusted because
    // it uses a Let with a new variable declaration, so the rawness,
    // erasedness and untrustedness of its branches cannot propagate further
    // up the tree.
    }
    if (caseList.getElseClause() != null) {
        Expression expr = caseList.getElseClause().getExpression();
        if (expr == null)
            return;
        // a single boxed one makes the whole switch boxed
        if (!CodegenUtil.isUnBoxed(expr))
            unboxed = false;
    // see comment about about why we don't propagate rawness etc here.
    }
    if (unboxed && !willEraseToObject(that.getUnit().denotableType(that.getTypeModel())))
        CodegenUtil.markUnBoxed(that);
    if (that.getTypeModel().isExactly(that.getUnit().getNullValueType())) {
        CodegenUtil.markTypeErased(that);
    }
}