org.millscript.millscript.expr
Class WhileExpr

java.lang.Object
  org.millscript.millscript.expr.Expr<WhileAction>
      org.millscript.millscript.expr.WhileExpr

public final class WhileExpr
extends Expr<WhileAction>

This class implement the while loop syntax. The loop body expression will be evaluated repeatedly until the predicate expression evaluates to false.

See Also:

WhileSyntax, WhileAction

Constructor Summary

WhileExpr(Expr<?> a, Expr<?> b)
Creates a new while expression, with the specified predicate and body expressions.

Method Summary

WhileAction	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.

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

WhileExpr

public WhileExpr(Expr<?> a,
                 Expr<?> b)

Creates a new while expression, with the specified predicate and body expressions.

Parameters:

a - the predicate expression, should return true/false

b - the body expression

Method Detail

compileIt

public WhileAction compileIt()

Description copied from class: Expr

Compiles this expression into an action.

Specified by:

compileIt in class Expr<WhileAction>

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<WhileAction>

Parameters:

state - the compiler state we are resolving in

See Also:

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