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