org.millscript.millscript.expr
Class Block

java.lang.Object
  org.millscript.millscript.expr.Expr<Action>
      org.millscript.millscript.expr.Block

public final class Block
extends Expr<Action>

This class implements a block expression. A block is a simple wrapper for its body expression, except that it introduces a new scope to the compiler.

See Also:

BlockAction

Constructor Summary

Block(Expr<?> e)
Creates a new block expression with the specified body.

Method Summary

Action	compileIt() Compiles this expression into an action.
void	resolve(CompilerState state) Resolves any NameExpr in the tree so that they refer to the correct ident.
void	setIsUsed() Marks this block as used.

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

Block

public Block(Expr<?> e)

Creates a new block expression with the specified body.

Parameters:

e - the body expression for this block

Method Detail

compileIt

public Action compileIt()

Description copied from class: Expr

Compiles this expression into an action.

Specified by:

compileIt in class Expr<Action>

Returns:

the Action for this expression

See Also:

Expr.compileIt()

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<Action>

Parameters:

state - the compiler state we are resolving in

See Also:

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

setIsUsed

public void setIsUsed()

Marks this block as used.