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Example 1 with EnhancedForStatement

use of com.google.devtools.j2objc.ast.EnhancedForStatement in project j2objc by google.

the class EnhancedForRewriter method convertToJavaIteratorLoop.

private void convertToJavaIteratorLoop(EnhancedForStatement node) {
    Expression expression = node.getExpression();
    TypeMirror expressionType = expression.getTypeMirror();
    VariableElement loopVariable = node.getParameter().getVariableElement();
    DeclaredType iterableType = typeUtil.findSupertype(expressionType, "java.lang.Iterable");
    ExecutablePair iteratorMethod = typeUtil.findMethod(iterableType, "iterator");
    DeclaredType iteratorType = (DeclaredType) iteratorMethod.type().getReturnType();
    ExecutablePair hasNextMethod = typeUtil.findMethod(iteratorType, "hasNext");
    ExecutablePair nextMethod = typeUtil.findMethod(iteratorType, "next");
    assert hasNextMethod != null && nextMethod != null;
    VariableElement iteratorVariable = GeneratedVariableElement.newLocalVar("iter__", iteratorType, null);
    MethodInvocation iteratorInvocation = new MethodInvocation(iteratorMethod, TreeUtil.remove(expression));
    VariableDeclarationStatement iteratorDecl = new VariableDeclarationStatement(iteratorVariable, iteratorInvocation);
    MethodInvocation hasNextInvocation = new MethodInvocation(hasNextMethod, new SimpleName(iteratorVariable));
    MethodInvocation nextInvocation = new MethodInvocation(nextMethod, new SimpleName(iteratorVariable));
    Block newLoopBody = makeBlock(TreeUtil.remove(node.getBody()));
    newLoopBody.addStatement(0, new VariableDeclarationStatement(loopVariable, nextInvocation));
    WhileStatement whileLoop = new WhileStatement();
    whileLoop.setExpression(hasNextInvocation);
    whileLoop.setBody(newLoopBody);
    Block block = new Block();
    List<Statement> stmts = block.getStatements();
    stmts.add(iteratorDecl);
    stmts.add(whileLoop);
    replaceLoop(node, block, whileLoop);
}
Also used : PostfixExpression(com.google.devtools.j2objc.ast.PostfixExpression) Expression(com.google.devtools.j2objc.ast.Expression) PrefixExpression(com.google.devtools.j2objc.ast.PrefixExpression) InfixExpression(com.google.devtools.j2objc.ast.InfixExpression) TypeMirror(javax.lang.model.type.TypeMirror) ExecutablePair(com.google.devtools.j2objc.types.ExecutablePair) EnhancedForStatement(com.google.devtools.j2objc.ast.EnhancedForStatement) LabeledStatement(com.google.devtools.j2objc.ast.LabeledStatement) VariableDeclarationStatement(com.google.devtools.j2objc.ast.VariableDeclarationStatement) WhileStatement(com.google.devtools.j2objc.ast.WhileStatement) Statement(com.google.devtools.j2objc.ast.Statement) SimpleName(com.google.devtools.j2objc.ast.SimpleName) VariableDeclarationStatement(com.google.devtools.j2objc.ast.VariableDeclarationStatement) Block(com.google.devtools.j2objc.ast.Block) MethodInvocation(com.google.devtools.j2objc.ast.MethodInvocation) VariableElement(javax.lang.model.element.VariableElement) GeneratedVariableElement(com.google.devtools.j2objc.types.GeneratedVariableElement) WhileStatement(com.google.devtools.j2objc.ast.WhileStatement) DeclaredType(javax.lang.model.type.DeclaredType)

Example 2 with EnhancedForStatement

use of com.google.devtools.j2objc.ast.EnhancedForStatement in project j2objc by google.

the class EnhancedForRewriter method handleArrayIteration.

private void handleArrayIteration(EnhancedForStatement node) {
    Expression expression = node.getExpression();
    ArrayType expressionType = (ArrayType) expression.getTypeMirror();
    VariableElement loopVariable = node.getParameter().getVariableElement();
    TypeMirror componentType = expressionType.getComponentType();
    TypeElement iosArrayType = typeUtil.getIosArray(componentType);
    TypeMirror bufferType = new PointerType(componentType);
    VariableElement arrayVariable = GeneratedVariableElement.newLocalVar("a__", expressionType, null);
    VariableElement bufferVariable = GeneratedVariableElement.newLocalVar("b__", bufferType, null).setTypeQualifiers("const*");
    VariableElement endVariable = GeneratedVariableElement.newLocalVar("e__", bufferType, null).setTypeQualifiers("const*");
    VariableElement bufferField = GeneratedVariableElement.newField("buffer", bufferType, iosArrayType).addModifiers(Modifier.PUBLIC);
    VariableElement sizeField = GeneratedVariableElement.newField("size", typeUtil.getInt(), iosArrayType).addModifiers(Modifier.PUBLIC);
    VariableDeclarationStatement arrayDecl = new VariableDeclarationStatement(arrayVariable, TreeUtil.remove(expression));
    FieldAccess bufferAccess = new FieldAccess(bufferField, new SimpleName(arrayVariable));
    VariableDeclarationStatement bufferDecl = new VariableDeclarationStatement(bufferVariable, bufferAccess);
    InfixExpression endInit = new InfixExpression(bufferType, InfixExpression.Operator.PLUS, new SimpleName(bufferVariable), new FieldAccess(sizeField, new SimpleName(arrayVariable)));
    VariableDeclarationStatement endDecl = new VariableDeclarationStatement(endVariable, endInit);
    WhileStatement loop = new WhileStatement();
    loop.setExpression(new InfixExpression(typeUtil.getBoolean(), InfixExpression.Operator.LESS, new SimpleName(bufferVariable), new SimpleName(endVariable)));
    Block newLoopBody = makeBlock(TreeUtil.remove(node.getBody()));
    loop.setBody(newLoopBody);
    newLoopBody.addStatement(0, new VariableDeclarationStatement(loopVariable, new PrefixExpression(componentType, PrefixExpression.Operator.DEREFERENCE, new PostfixExpression(bufferVariable, PostfixExpression.Operator.INCREMENT))));
    Block block = new Block();
    List<Statement> stmts = block.getStatements();
    stmts.add(arrayDecl);
    stmts.add(bufferDecl);
    stmts.add(endDecl);
    stmts.add(loop);
    replaceLoop(node, block, loop);
}
Also used : TypeElement(javax.lang.model.element.TypeElement) EnhancedForStatement(com.google.devtools.j2objc.ast.EnhancedForStatement) LabeledStatement(com.google.devtools.j2objc.ast.LabeledStatement) VariableDeclarationStatement(com.google.devtools.j2objc.ast.VariableDeclarationStatement) WhileStatement(com.google.devtools.j2objc.ast.WhileStatement) Statement(com.google.devtools.j2objc.ast.Statement) SimpleName(com.google.devtools.j2objc.ast.SimpleName) PointerType(com.google.devtools.j2objc.types.PointerType) VariableElement(javax.lang.model.element.VariableElement) GeneratedVariableElement(com.google.devtools.j2objc.types.GeneratedVariableElement) WhileStatement(com.google.devtools.j2objc.ast.WhileStatement) ArrayType(javax.lang.model.type.ArrayType) PostfixExpression(com.google.devtools.j2objc.ast.PostfixExpression) Expression(com.google.devtools.j2objc.ast.Expression) PrefixExpression(com.google.devtools.j2objc.ast.PrefixExpression) InfixExpression(com.google.devtools.j2objc.ast.InfixExpression) TypeMirror(javax.lang.model.type.TypeMirror) PrefixExpression(com.google.devtools.j2objc.ast.PrefixExpression) InfixExpression(com.google.devtools.j2objc.ast.InfixExpression) VariableDeclarationStatement(com.google.devtools.j2objc.ast.VariableDeclarationStatement) Block(com.google.devtools.j2objc.ast.Block) PostfixExpression(com.google.devtools.j2objc.ast.PostfixExpression) FieldAccess(com.google.devtools.j2objc.ast.FieldAccess)

Aggregations

Block (com.google.devtools.j2objc.ast.Block)2 EnhancedForStatement (com.google.devtools.j2objc.ast.EnhancedForStatement)2 Expression (com.google.devtools.j2objc.ast.Expression)2 InfixExpression (com.google.devtools.j2objc.ast.InfixExpression)2 LabeledStatement (com.google.devtools.j2objc.ast.LabeledStatement)2 PostfixExpression (com.google.devtools.j2objc.ast.PostfixExpression)2 PrefixExpression (com.google.devtools.j2objc.ast.PrefixExpression)2 SimpleName (com.google.devtools.j2objc.ast.SimpleName)2 Statement (com.google.devtools.j2objc.ast.Statement)2 VariableDeclarationStatement (com.google.devtools.j2objc.ast.VariableDeclarationStatement)2 WhileStatement (com.google.devtools.j2objc.ast.WhileStatement)2 GeneratedVariableElement (com.google.devtools.j2objc.types.GeneratedVariableElement)2 VariableElement (javax.lang.model.element.VariableElement)2 TypeMirror (javax.lang.model.type.TypeMirror)2 FieldAccess (com.google.devtools.j2objc.ast.FieldAccess)1 MethodInvocation (com.google.devtools.j2objc.ast.MethodInvocation)1 ExecutablePair (com.google.devtools.j2objc.types.ExecutablePair)1 PointerType (com.google.devtools.j2objc.types.PointerType)1 TypeElement (javax.lang.model.element.TypeElement)1 ArrayType (javax.lang.model.type.ArrayType)1