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package java_cup;
/**
* This class represents a part of a production which contains an
* action. These are eventually eliminated from productions and converted
* to trailing actions by factoring out with a production that derives the
* empty string (and ends with this action).
*
* @see java_cup.production
* @version last update: 11/25/95
* @author Scott Hudson
*/
public class action_part extends production_part {
/*-----------------------------------------------------------*/
/*--- Constructors ------------------------------------------*/
/*-----------------------------------------------------------*/
/** Simple constructor.
* @param code_str string containing the actual user code.
*/
public action_part(String code_str)
{
super(/* never have a label on code */null);
_code_string = code_str;
}
/*-----------------------------------------------------------*/
/*--- (Access to) Instance Variables ------------------------*/
/*-----------------------------------------------------------*/
/** String containing code for the action in question. */
protected String _code_string;
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** String containing code for the action in question. */
public String code_string() {return _code_string;}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Set the code string. */
public void set_code_string(String new_str) {_code_string = new_str;}
/*-----------------------------------------------------------*/
/*--- General Methods ---------------------------------------*/
/*-----------------------------------------------------------*/
/** Override to report this object as an action. */
public boolean is_action() { return true; }
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Equality comparison for properly typed object. */
public boolean equals(action_part other)
{
/* compare the strings */
return other != null && super.equals(other) &&
other.code_string().equals(code_string());
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Generic equality comparison. */
public boolean equals(Object other)
{
if (!(other instanceof action_part))
return false;
else
return equals((action_part)other);
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Produce a hash code. */
public int hashCode()
{
return super.hashCode() ^
(code_string()==null ? 0 : code_string().hashCode());
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Convert to a string. */
public String toString()
{
return super.toString() + "{" + code_string() + "}";
}
/*-----------------------------------------------------------*/
}
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