//^ requires template.ContainingBlock != containingBlock;
//^ ensures this.containingBlock == containingBlock;
/// <summary>
/// A copy constructor that allocates an instance that is the same as the given template, except for its containing block.
/// </summary>
/// <param name="containingBlock">A new value for containing block. This replaces template.ContainingBlock in the resulting copy of template.</param>
/// <param name="template">The template to copy.</param>
private VccAddition(BlockStatement containingBlock, VccAddition template)
: base(containingBlock, template)
{
}
/// <summary>
/// Creates an addition expression with the given left operand and this.RightOperand.
/// The method does not use this.LeftOperand.Expression, since it may be necessary to factor out any subexpressions so that
/// they are evaluated only once. The given left operand expression is expected to be the expression that remains after factoring.
/// </summary>
/// <param name="leftOperand">An expression to combine with this.RightOperand into a binary expression.</param>
protected override Expression CreateBinaryExpression(Expression leftOperand)
{
Expression result = new VccAddition(leftOperand, this.RightOperand, this.SourceLocation);
result.SetContainingExpression(this);
return result;
}
/// <summary>
/// Returns an expression corresponding to *(ptr + index) where ptr is this.IndexedObject and index is the first element of this.ConvertedArguments.
/// </summary>
protected override IExpression ProjectAsDereferencedPointerAddition()
{
//transform to *(ptr + index)
IEnumerator<Expression> indexEnumerator = this.ConvertedArguments.GetEnumerator();
if (!indexEnumerator.MoveNext()) return CodeDummy.Expression;
Expression ptr = this.IndexedObject;
if (this.FixedArrayElementType != null) {
ptr = new VccAddressOf(new VccAddressableExpression(this.IndexedObject, true), this.IndexedObject.SourceLocation);
ptr.SetContainingExpression(this);
}
Expression index = indexEnumerator.Current;
if (index.Type.IsEnum) index = this.Helper.ExplicitConversion(index, index.Type.UnderlyingType.ResolvedType);
VccAddition addition = new VccAddition(ptr, index, this.SourceLocation);
AddressDereference aderef = new AddressDereference(addition, this.SourceLocation);
aderef.SetContainingExpression(this);
return aderef.ProjectAsIExpression();
}
