org.erights.e.elang.evm
Class SuchThatPattern

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.SuchThatPattern

All Implemented Interfaces:

Cloneable, EPrintable, MatchMaker

public class SuchThatPattern

extends Pattern

Safe: BNF: pattern "?" expr

Matches if the sub pattern matches and the expression evaluates to true.

Author:

Mark S. Miller

Field Summary

private Pattern	mySubPattern
private EExpr	myTest

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

SuchThatPattern(SourceSpan optSpan, Pattern sub, EExpr test)
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

Field Detail

mySubPattern

private final Pattern mySubPattern

myTest

private final EExpr myTest

Constructor Detail

SuchThatPattern

public SuchThatPattern(SourceSpan optSpan,
                       Pattern sub,
                       EExpr test)

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

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

optName

public String optName()

Enabled:

Specified by:

optName in class Pattern