org.millscript.millscript.expr
Class UnaryOpExpr<A extends Action>

java.lang.Object
  org.millscript.millscript.expr.Expr<A>
      org.millscript.millscript.expr.UnaryOpExpr<A>

All Implemented Interfaces:

OneResult

Direct Known Subclasses:

ConstantLeftArithExpr, ConstantRightArithExpr

public abstract class UnaryOpExpr<A extends Action>
extends Expr<A>
implements OneResult

This class represents binary opereration syntax. A binary operation is one which returns a single result, from two single inputs. This means the left and right hand side expressions must produce single results, and that the expression as a whole will return a single result.

See Also:

AppendExpr, BinaryOpAction

Constructor Summary

UnaryOpExpr(Expr<?> a)
Creates a new unary operation expression for the specified expression.

Method Summary

A	compileIt() Compiles this expression into an action.
abstract A	newAction(Action a) Compiles this expression into an action.
void	resolve(CompilerState state) Resolves any NameExpr in the tree so that they refer to the correct ident.

Methods inherited from class org.millscript.millscript.expr.Expr

arity, compile, isIntegerExpr, resolveList, setLineNumber, setOrigin, show, show

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UnaryOpExpr

public UnaryOpExpr(Expr<?> a)

Creates a new unary operation expression for the specified expression.

Parameters:

a - the single expression, which must return a single result

Method Detail

compileIt

public final A compileIt()

Description copied from class: Expr

Compiles this expression into an action.

Specified by:

compileIt in class Expr<A extends Action>

Returns:

the Action for this expression

See Also:

Expr.compileIt()

newAction

public abstract A newAction(Action a)

Compiles this expression into an action. This is method performs the expression specific compilation, but does not need to handle the single expression compilation.

Parameters:

a - the compiled single expression

Returns:

the Action for this expression

resolve

public void resolve(CompilerState state)

Description copied from class: Expr

Resolves any NameExpr in the tree so that they refer to the correct ident. e.g. This method is responsible for ensuring that references to a function argument in the body of a function actually refer to the correct value.

Specified by:

resolve in class Expr<A extends Action>

Parameters:

state - the compiler state we are resolving in

See Also:

Expr.resolve(org.millscript.millscript.vm.CompilerState)