avrora.syntax
Interface Context

All Known Implementing Classes:

Module

public interface Context

The Context interface represents a context in which an expression in a program should be evaluated. It provides the environmental bindings necessary to resolve variable references within computed expressions.

Method Summary

Register	getRegister(AbstractToken ident) The getRegister() method resolves a register that may have been renamed earlier in the program.
int	getVariable(AbstractToken ident) The getVariable() method looks up the value of a named constant within the current environment and returns its value.

Method Detail

getRegister

public Register getRegister(AbstractToken ident)

The getRegister() method resolves a register that may have been renamed earlier in the program.

Parameters:

ident - the string name of the register or register alias

Returns:

a reference to the Register instance representing the register with the specified name or alias

getVariable

public int getVariable(AbstractToken ident)

The getVariable() method looks up the value of a named constant within the current environment and returns its value.

Parameters:

ident - the name of the variable

Returns:

the value of the variable within the environment