org.erights.e.elang.evm
Class IgnorePattern

java.lang.Object
  |
  +--org.erights.e.elang.evm.ParseNode
        |
        +--org.erights.e.elang.evm.ENode
              |
              +--org.erights.e.elang.evm.Pattern
                    |
                    +--org.erights.e.elang.evm.IgnorePattern

All Implemented Interfaces:

Cloneable, EPrintable, MatchMaker

public class IgnorePattern

extends Pattern

Safe: BNF: "_"

Matches anything succesfully, but binds nothing.

Author:

Mark S. Miller

Field Summary

Fields inherited from class org.erights.e.elang.evm.ENode

Fields inherited from class org.erights.e.elang.evm.ParseNode

NUM_PR, PR_ASSIGN, PR_CALL, PR_COMP, PR_EEXPR, PR_LISTPATT, PR_ORDER, PR_PATTERN, PR_PRIM, PR_START

Constructor Summary

IgnorePattern(SourceSpan optSpan)
Enabled:

Method Summary

protected StaticScope	computeStaticScope() When staticScope() is first requested on a given node, it calls computeStaticScope() to do the actual computation, which is then remembered.
boolean	matchBind(ConstList args, Object specimen, FlexList bindings) Enabled:
String	optName() Enabled:
void	subPrintOn(TextWriter out, int priority) Enabled:
(package private) void	testMatch(EvalContext ctx, Object specimen, OneArgFunc optEjector) If this pattern matches the specimen, add macthing bindings to the scope.
Object	welcome(ETreeVisitor visitor) Enabled:

Methods inherited from class org.erights.e.elang.evm.Pattern

__printOn, substitute

Methods inherited from class org.erights.e.elang.evm.ENode

cleanCopy, copy, getOptPatternMap, getOptScopeMap, getPatternMap, getScopeMap, qbuild, setPatternMap, setScopeMap, staticScope, synEnv

Methods inherited from class org.erights.e.elang.evm.ParseNode

asText, getOptSpan, lnPrintOn, lnPrintOn, matchBind, matchBind, matchBind, printListOn, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

IgnorePattern

public IgnorePattern(SourceSpan optSpan)

Enabled:

Method Detail

welcome

public Object welcome(ETreeVisitor visitor)

Enabled:

Specified by:

welcome in class ENode

computeStaticScope

protected StaticScope computeStaticScope()

Description copied from class: ENode

When staticScope() is first requested on a given node, it calls computeStaticScope() to do the actual computation, which is then remembered.

Specified by:

computeStaticScope in class ENode

matchBind

public boolean matchBind(ConstList args,
                         Object specimen,
                         FlexList bindings)

Enabled:

Specified by:

matchBind in interface MatchMaker

Specified by:

matchBind in class ParseNode

optName

public String optName()

Enabled:

Specified by:

optName in class Pattern

subPrintOn

public void subPrintOn(TextWriter out,
                       int priority)
                throws IOException

Enabled:

Specified by:

subPrintOn in class ParseNode

IOException

testMatch

void testMatch(EvalContext ctx,
               Object specimen,
               OneArgFunc optEjector)

Description copied from class: Pattern

If this pattern matches the specimen, add macthing bindings to the scope.

Otherwise report the reason why not according to optEjector.

Specified by:

testMatch in class Pattern