expressions.txt

# standalone assignment expression

x = 3;

==>

Program(
  ExpressionStatement(AssignmentExpression(
    Identifier,
    AssignOp,
    IntegerLiteral)))


# standalone binary expression

a > b;
a < b;
a == b;
a >= b;
a <= b;
a != b;
a && b;
a || b;
a & b;
a | b;
a ^ b;
a % b;
a << b;
a >> b;
a >>> b;
3 + 2;
3 - 2;
3 * 2;
9 / 3;

==>

Program(
  ExpressionStatement(BinaryExpression(Identifier, CompareOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, CompareOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, CompareOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, CompareOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, CompareOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, CompareOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, LogicOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, LogicOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, BitOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, BitOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, BitOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, ArithOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, BitOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, BitOp, Identifier)),
  ExpressionStatement(BinaryExpression(Identifier, BitOp, Identifier)),
  ExpressionStatement(BinaryExpression(IntegerLiteral, ArithOp, IntegerLiteral)),
  ExpressionStatement(BinaryExpression(IntegerLiteral, ArithOp, IntegerLiteral)),
  ExpressionStatement(BinaryExpression(IntegerLiteral, ArithOp, IntegerLiteral)),
  ExpressionStatement(BinaryExpression(IntegerLiteral, ArithOp, IntegerLiteral)))


# instanceof expressions

a instanceof C.D;
a instanceof List<B>;
c instanceof C[];

==>

Program(
  ExpressionStatement(InstanceofExpression(
    Identifier,
    instanceof,
    ScopedTypeName(TypeName, TypeName))),
  ExpressionStatement(InstanceofExpression(
    Identifier,
    instanceof,
    GenericType(TypeName, TypeArguments(TypeName)))),
  ExpressionStatement(InstanceofExpression(
    Identifier,
    instanceof,
    ArrayType(TypeName, Dimension))))


# if statements

if (x)
  y;

==>

Program(
  IfStatement(if,
    ParenthesizedExpression(Identifier),
    ExpressionStatement(Identifier)))


# if statements with braces

if (x) {
  y;
}

==>

Program(
  IfStatement(if,
    ParenthesizedExpression(Identifier),
    Block(ExpressionStatement(Identifier))))


# if statements with assignment without braces

if (x = 3)
  y = 2;

==>

Program(
  IfStatement(if,
    ParenthesizedExpression(
      AssignmentExpression(
        Identifier,
        AssignOp,
        IntegerLiteral)),
    ExpressionStatement(
      AssignmentExpression(
        Identifier,
        AssignOp,
        IntegerLiteral))))


# if then else statement

if (x = 3) {
  y = 9;
} else {
  y = 0;
}

==>

Program(
  IfStatement(if,
    ParenthesizedExpression(
      AssignmentExpression(
        Identifier,
        AssignOp,
        IntegerLiteral)),
    Block(
      ExpressionStatement(AssignmentExpression(
        Identifier,
        AssignOp,
        IntegerLiteral))),
    else,
    Block(
      ExpressionStatement(AssignmentExpression(
        Identifier,
        AssignOp,
        IntegerLiteral)))))


# nested if then else statements

if (a)
  if (b)
    c();
  else
    d();

==>

Program(
  IfStatement(if,
    ParenthesizedExpression(Identifier),
    IfStatement(if,
      ParenthesizedExpression(Identifier),
      ExpressionStatement(MethodInvocation(MethodName(Identifier), ArgumentList)),
      else,
      ExpressionStatement(MethodInvocation(MethodName(Identifier), ArgumentList)))))


# ternary expressions

max = (a > b) ? a : b;

==>

Program(
  ExpressionStatement(AssignmentExpression(
    Identifier,
    AssignOp,
    TernaryExpression(
      ParenthesizedExpression(BinaryExpression(
        Identifier,
        CompareOp,
        Identifier)),
      LogicOp,
      Identifier,
      Identifier))))


# for statement

for(int i = 1; i < 11; i++) {
  System.out.println("Count is: " + i);
}

for (j.init(i); j.check(); j.update()) {
  System.out.println(j);
}

==>

Program(
  ForStatement(for, ForSpec(
    LocalVariableDeclaration(
      PrimitiveType,
      VariableDeclarator(
        Definition,
        AssignOp,
        IntegerLiteral)),
    BinaryExpression(
      Identifier,
      CompareOp,
      IntegerLiteral),
    UpdateExpression(Identifier, UpdateOp,)),
    Block(
      ExpressionStatement(MethodInvocation(
        FieldAccess(
          Identifier,
          Identifier),
        MethodName(Identifier),
        ArgumentList(BinaryExpression(
          StringLiteral,
          ArithOp,
          Identifier)))))),
  ForStatement(for, ForSpec(
    MethodInvocation(
      Identifier,
      MethodName(Identifier),
      ArgumentList(Identifier)),
    MethodInvocation(
      Identifier,
      MethodName(Identifier),
      ArgumentList),
    MethodInvocation(
      Identifier,
      MethodName(Identifier),
      ArgumentList)),
    Block(
      ExpressionStatement(MethodInvocation(
        FieldAccess(
          Identifier,
          Identifier),
        MethodName(Identifier),
        ArgumentList(Identifier))))))


# Enhanced for statements

for (A b : c) {
  d(b);
}

==>

Program(
  EnhancedForStatement(for, ForSpec(
    TypeName,
    Definition,
    Identifier),
    Block(
      ExpressionStatement(MethodInvocation(
        MethodName(Identifier),
        ArgumentList(Identifier))))))


# while statement

class WhileDemo {
    public static void main(String[] args){
        int count = 1;
        while (count < 11) {
            System.out.println("Count is: " + count);
            count++;
        }
    }
}

==>

Program(
  ClassDeclaration(class,
    Definition,
    ClassBody(
      MethodDeclaration(
        Modifiers(public, static),
        void,
        Definition,
        FormalParameters(
          FormalParameter(
            ArrayType(
              TypeName,
              Dimension),
            Definition)),
        Block(
          LocalVariableDeclaration(
            PrimitiveType,
            VariableDeclarator(
              Definition,
              AssignOp,
              IntegerLiteral)),
          WhileStatement(while,
            ParenthesizedExpression(
              BinaryExpression(
                Identifier,
                CompareOp,
                IntegerLiteral)),
            Block(
              ExpressionStatement(MethodInvocation(
                FieldAccess(
                  Identifier,
                  Identifier),
                MethodName(Identifier),
                ArgumentList(
                  BinaryExpression(StringLiteral, ArithOp, Identifier)))),
              ExpressionStatement(UpdateExpression(Identifier, UpdateOp)))))))))


# try-with-resources statements

try (FileInputStream input = new FileInputStream("file.txt")) {
  int data = input.read();
}

==>

Program(
  TryWithResourcesStatement(try,
    ResourceSpecification(
      Resource(
        TypeName,
        Definition,
        AssignOp,
        ObjectCreationExpression(new,
          TypeName,
          ArgumentList(StringLiteral)))),
    Block(
      LocalVariableDeclaration(
        PrimitiveType,
        VariableDeclarator(
          Definition,
          AssignOp,
          MethodInvocation(
            Identifier,
            MethodName(Identifier),
            ArgumentList))))))


# return statement

return x;
return x * y;
return x + 2;
return fire(x);

==>

Program(
  ReturnStatement(return,Identifier),
  ReturnStatement(return,BinaryExpression(Identifier, ArithOp, Identifier)),
  ReturnStatement(return,BinaryExpression(Identifier, ArithOp, IntegerLiteral)),
  ReturnStatement(return,MethodInvocation(MethodName(Identifier), ArgumentList(Identifier))))


# annotation

@SuppressWarnings(value = "unchecked")
@GwtCompatible(emulated = true)
class Duck {

}

==>

Program(
  ClassDeclaration(
    Modifiers(
      Annotation(
        Identifier,
        AnnotationArgumentList(
          ElementValuePair(
            Identifier,
            AssignOp,
            StringLiteral))),
      Annotation(
        Identifier,
        AnnotationArgumentList(
          ElementValuePair(
            Identifier,
            AssignOp,
            BooleanLiteral)))),
    class,
    Definition,
    ClassBody))


# marker annotation

@Override
class Quack {
  @bar
  public void foo() {

  }
}

==>

Program(
  ClassDeclaration(
    Modifiers(MarkerAnnotation(Identifier)),
    class,
    Definition,
    ClassBody(
      MethodDeclaration(
        Modifiers(MarkerAnnotation(Identifier), public),
        void,
        Definition,
        FormalParameters,
        Block))))


# single element annotation

@Duck(waddle.swim)
@SuppressWarnings("unchecked")
class Quack {

}

==>

Program(
  ClassDeclaration(
    Modifiers(
      Annotation(Identifier, AnnotationArgumentList(FieldAccess(Identifier, Identifier))),
      Annotation(Identifier, AnnotationArgumentList(StringLiteral))),
    class,
    Definition,
    ClassBody))


# lambda expression

class LambdaTest {
  void singleton() {
    version -> create;
    (a, b) -> a + b;
  }
}

==>

Program(
  ClassDeclaration(class,
    Definition,
    ClassBody(
      MethodDeclaration(
        void,
        Definition,
        FormalParameters,
        Block(
          ExpressionStatement(LambdaExpression(
            Definition,
            Identifier)),
          ExpressionStatement(LambdaExpression(
            InferredParameters(Definition, Definition),
            BinaryExpression(Identifier, ArithOp, Identifier))))))))


# switch statement

public class SwitchDemo {
  public static void main(String[] args) {
    int destinysChild = 2;
    String destinysChildString;
    switch (destinysChild) {
        case 1:  destinysChildString = "Beyonce";
                 break;
        case 2:  destinysChildString = "Kelly";
                 break;
        case 3:  destinysChildString = "Michelle";
                 break;
        default: destinysChildString = "Invalid";
                 break;
    }
    System.out.println(destinysChildString);
  }
}

==>

Program(
  ClassDeclaration(
    Modifiers(public),
    class,
    Definition,
    ClassBody(
      MethodDeclaration(
        Modifiers(public, static),
        void,
        Definition,
        FormalParameters(
          FormalParameter(
            ArrayType(
              TypeName,
              Dimension),
            Definition)),
        Block(
          LocalVariableDeclaration(
            PrimitiveType,
            VariableDeclarator(
              Definition,
              AssignOp,
              IntegerLiteral)),
          LocalVariableDeclaration(
            TypeName,
            VariableDeclarator(Definition)),
          SwitchStatement(switch,
            ParenthesizedExpression(Identifier),
            SwitchBlock(
              SwitchLabel(case,IntegerLiteral),
              ExpressionStatement(AssignmentExpression(
                Identifier,
                AssignOp,
                StringLiteral)),
              BreakStatement(break),
              SwitchLabel(case,IntegerLiteral),
              ExpressionStatement(AssignmentExpression(
                Identifier,
                AssignOp,
                StringLiteral)),
              BreakStatement(break),
              SwitchLabel(case,IntegerLiteral),
              ExpressionStatement(AssignmentExpression(
                Identifier,
                AssignOp,
                StringLiteral)),
              BreakStatement(break),
              SwitchLabel(default),
              ExpressionStatement(AssignmentExpression(
                Identifier,
                AssignOp,
                StringLiteral)),
              BreakStatement(break))),
          ExpressionStatement(MethodInvocation(
            FieldAccess(
              Identifier,
              Identifier),
            MethodName(Identifier),
            ArgumentList(Identifier))))))))


# type arguments

class Box <T> {
  private T theObject;
  public Box( T arg) { theObject = arg; }
  // more code
}

==>

Program(
  ClassDeclaration(class,
    Definition,
      TypeParameters(
        TypeParameter(
          Definition)),
    ClassBody(
      FieldDeclaration(
        Modifiers(private),
          TypeName,
          VariableDeclarator(Definition)),
      ConstructorDeclaration(
        Modifiers(public),
        Definition,
        FormalParameters(
          FormalParameter(
            TypeName,
            Definition)),
        ConstructorBody(
          ExpressionStatement(AssignmentExpression(
            Identifier, AssignOp, Identifier)))),
      LineComment)))


# wildcard

class WildcardDemo {
  List<? extends B> a;
}

==>

Program(
  ClassDeclaration(class,
    Definition,
      ClassBody(
        FieldDeclaration(
          GenericType(
            TypeName,
            TypeArguments(
              Wildcard(extends, TypeName))),
          VariableDeclarator(Definition)))))


# type arguments with generic types

class someClass <T> {
  public List<T> someMethod() {
     List< T > list = Collections.< T >emptyList();
     return list;
  }
  public static <S> void anotherMethod(S arg) {
     List< S > list = Collections.< S >emptyList();
  }
}

==>

Program(
  ClassDeclaration(class,
    Definition,
    TypeParameters(
      TypeParameter(
        Definition)),
      ClassBody(
        MethodDeclaration(
          Modifiers(public),
            GenericType(
              TypeName,
              TypeArguments(TypeName)),
            Definition,
            FormalParameters,
            Block(
              LocalVariableDeclaration(
                GenericType(
                  TypeName,
                  TypeArguments(TypeName)),
                VariableDeclarator(
                  Definition,
                  AssignOp,
                  MethodInvocation(
                    Identifier,
                    TypeArguments(TypeName),
                    MethodName(Identifier),
                    ArgumentList))),
              ReturnStatement(return,Identifier))),
        MethodDeclaration(
          Modifiers(public, static),
          TypeParameters(
            TypeParameter(
              Definition)),
          void,
            Definition,
            FormalParameters(
              FormalParameter(
                TypeName,
                Definition)),
            Block(
              LocalVariableDeclaration(
                GenericType(
                  TypeName,
                  TypeArguments(TypeName)),
                VariableDeclarator(
                  Definition,
                  AssignOp,
                  MethodInvocation(
                    Identifier,
                    TypeArguments(TypeName),
                    MethodName(Identifier),
                    ArgumentList))))))))


# empty type arguments

Box<Integer> integerBox = new Box<>();

==>

Program(
  LocalVariableDeclaration(
    GenericType(TypeName, TypeArguments(TypeName)),
    VariableDeclarator(
      Definition,
      AssignOp,
      ObjectCreationExpression(new,
        GenericType(TypeName, TypeArguments),
        ArgumentList))))


# method references

action = bar::method;
foo.bar::method;
String[]::new;
Foo<T>::apply;
super::something;

==>

Program(
  ExpressionStatement(AssignmentExpression(Identifier, AssignOp, MethodReference(Identifier, Identifier))),
  ExpressionStatement(MethodReference(FieldAccess(Identifier, Identifier), Identifier)),
  ExpressionStatement(MethodReference(ArrayType(TypeName, Dimension), new)),
  ExpressionStatement(MethodReference(GenericType(TypeName, TypeArguments(TypeName)), Identifier)),
  ExpressionStatement(MethodReference(super, Identifier)))

# text block

x = """
    hello
    multi-""-line
    foo""";

==>

Program(ExpressionStatement(AssignmentExpression(Identifier,AssignOp,TextBlock)))

# precedence

x = 1 < 2 || a & b ^ c * 2 && 1 + d | e;

==>

Program(ExpressionStatement(AssignmentExpression(Identifier,AssignOp,
  BinaryExpression(
    BinaryExpression(IntegerLiteral,CompareOp,IntegerLiteral),
    LogicOp,
    BinaryExpression(
      BinaryExpression(
        BinaryExpression(Identifier,BitOp,Identifier),
        BitOp,
        BinaryExpression(Identifier,ArithOp,IntegerLiteral)),
      LogicOp,
      BinaryExpression(
        BinaryExpression(IntegerLiteral,ArithOp,Identifier),
        BitOp,
        Identifier))))))

# Unicode identifiers

Amélie + 橘子;

==>

Program(ExpressionStatement(BinaryExpression(Identifier,ArithOp,Identifier)))