An r-value is a read access to a variable.
In other words, it is a variable access that does not occur as the destination of a simple assignment, but it may occur as the destination of a compound assignment or a unary assignment.
Known direct subtypes
Gets a child of this expression.
Gets the name of a primary CodeQL class to which this element belongs.
Gets a statement that directly or transitively contains this expression, if any. This is equivalent to
Gets the basic block in which this expression occurs, if any.
Gets the compilation unit in which this expression occurs.
Gets the callable in which this expression occurs, if any.
Gets the statement containing this expression, if any.
Gets the file associated with this element.
This statement’s Halstead ID (used to compute Halstead metrics).
Gets the index of this expression as a child of its parent.
Gets the kind of this expression.
Gets the source location for this element.
Gets the number of comment lines that this element ranges over.
Gets the number of lines of code that this element ranges over.
Gets the parent of this expression.
DEPRECATED: This is no longer necessary. See
Gets the qualifier of this variable access, if any.
Gets the total number of lines that this element ranges over, including lines of code, comment and whitespace-only lines.
Gets the type of this expression.
Gets the variable accessed by this variable access.
Holds if this element is at the specified location. The location spans column
Holds if this variable access has a qualifier.
Holds if this expression is a compile-time constant.
Holds if this expression occurs in a static context.
Holds if this variable access is an l-value.
Holds if this access refers to a local variable or a field of the receiver of the enclosing method or constructor.
Holds if this expression is the child of the specified parent at the specified (zero-based) position.
Holds if this expression is parenthesized.
Holds if this variable access is an r-value.
Gets a printable representation of this expression.