Mercurial > hg > truffle
view graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/model/GuardExpression.java @ 16759:23415229349b
Truffle-DSL: new package structure.
author | Christian Humer <christian.humer@gmail.com> |
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date | Mon, 11 Aug 2014 15:57:14 +0200 |
parents | graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/typesystem/GuardExpression.java@bd28da642eea |
children | e6d15134ca86 |
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package com.oracle.truffle.dsl.processor.model; import java.util.*; public final class GuardExpression { private GuardData resolvedGuard; private final String guardName; private final boolean negated; public GuardExpression(String expression) { if (expression.startsWith("!")) { guardName = expression.substring(1, expression.length()); negated = true; } else { guardName = expression; negated = false; } } public boolean isResolved() { return resolvedGuard != null; } public String getGuardName() { return guardName; } public void setGuard(GuardData guard) { this.resolvedGuard = guard; } @Override public boolean equals(Object obj) { if (obj instanceof GuardExpression) { GuardExpression other = (GuardExpression) obj; if (isResolved() && other.isResolved()) { return resolvedGuard.equals(other.resolvedGuard) && negated == other.negated; } else { return guardName.equals(other.guardName) && negated == other.negated; } } return false; } @Override public int hashCode() { return Objects.hash(guardName, negated, resolvedGuard); } public final boolean implies(GuardExpression other) { if (other == this) { return true; } if (getGuardName().equals(other.getGuardName())) { if (isNegated() == other.isNegated()) { return true; } } if (isResolved() && other.isResolved()) { for (GuardExpression implies : getResolvedGuard().getImpliesExpressions()) { if (implies.getGuardName().equals(other.getGuardName())) { if (implies.isNegated() == other.isNegated()) { return true; } } } } return false; } @Override public String toString() { return (negated ? "!" : "") + guardName; } public boolean isNegated() { return negated; } public GuardData getResolvedGuard() { return resolvedGuard; } }