edu.umn.cs.melt.copper.runtime.engines.semantics

Class SpecialParserAttributes

java.lang.Object

edu.umn.cs.melt.copper.runtime.engines.semantics.SpecialParserAttributes

public class SpecialParserAttributes
extends Object

Holds "special parser attributes" reset before performing each semantic action, meant for carrying information back to the core parser for use.

Author:

August Schwerdfeger <schw0709@umn.edu>

Field Summary

Fields

Modifier and Type	Field and Description
boolean	latchLocation Whether or not to "latch" the location on a shift action, i.e., re-scan the same token on the next scan.
VirtualLocation	virtualLocation The "virtual location" of a certain token, an attribute on parse-tree leaf nodes.

Constructor Summary

Constructors

Constructor and Description
SpecialParserAttributes(VirtualLocation oldVirtualLocation)

Method Summary

Modifier and Type	Method and Description
static boolean	isValidAttrName(String attrName) Determines if a parser attribute name can be validly used.
void	resetSpecialAttributes() Resets per-terminal attributes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

virtualLocation

public VirtualLocation virtualLocation

The "virtual location" of a certain token, an attribute on parse-tree leaf nodes.

latchLocation

public boolean latchLocation

Whether or not to "latch" the location on a shift action, i.e., re-scan the same token on the next scan.

Constructor Detail

SpecialParserAttributes

public SpecialParserAttributes(VirtualLocation oldVirtualLocation)

Method Detail

resetSpecialAttributes

public void resetSpecialAttributes()

Resets per-terminal attributes.

isValidAttrName

public static boolean isValidAttrName(String attrName)

Determines if a parser attribute name can be validly used.

Parameters:

attrName - The proposed name.

Returns:

true iff the name may be validly used.