avrora.syntax
Class Expr.Func
java.lang.Object
avrora.syntax.ASTNode
avrora.syntax.Expr
avrora.syntax.Expr.Func
- Enclosing class:
- Expr
- public static class Expr.Func
- extends Expr
The Func
class represents a builtin function that is applied to an operand. For example, a
function might be "high" which returns the high byte of a 16-bit operand, "log2" which returns the
logarithm, etc.
Method Summary |
int |
evaluate(int currentByteAddress,
Context c)
The evaluate() method computes the value of the expression in this context and returns
its value. |
AbstractToken |
getLeftMostToken()
The getLeftMostToken() method gets the first token associated with the abstract syntax
tree node. |
AbstractToken |
getRightMostToken()
The getRightMostToken() method gets the last token associated with the abstract syntax
tree node. |
java.lang.String |
toString()
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
func
public final AbstractToken func
argument
public final Expr argument
last
public final AbstractToken last
Expr.Func
public Expr.Func(AbstractToken tok,
Expr arg,
AbstractToken l)
evaluate
public int evaluate(int currentByteAddress,
Context c)
- The
evaluate()
method computes the value of the expression in this context and returns
its value. This implementation works straightforwardly by first evaluating the operand, and then
computing the result of the function.
- Specified by:
evaluate
in class Expr
- Parameters:
currentByteAddress
- the current byte address within the programc
- the context in which to evaluate this expression
- Returns:
- the value of the expression as a 32-bit integer
getLeftMostToken
public AbstractToken getLeftMostToken()
- Description copied from class:
ASTNode
- The
getLeftMostToken()
method gets the first token associated with the abstract syntax
tree node.
- Specified by:
getLeftMostToken
in class ASTNode
- Returns:
- an
AbstractToken
instance representing the first token that is a part of this
syntactic item.
getRightMostToken
public AbstractToken getRightMostToken()
- Description copied from class:
ASTNode
- The
getRightMostToken()
method gets the last token associated with the abstract syntax
tree node.
- Specified by:
getRightMostToken
in class ASTNode
- Returns:
- an
AbstractToken
instance representing the last token that is a part of this
syntactic item.
toString
public java.lang.String toString()