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Enhanced logic in EqualsIntrinsic.

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Adapted from https://github.com/develar/kotlin/commit/a9e0a42fb1347fa8e21c86b5a073ef8a7c873da0.
This commit is contained in:
Pavel V. Talanov
2012-08-13 15:47:16 +04:00
parent 8ed7e7de50
commit fe9a2b6e5e
1 changed files with 18 additions and 0 deletions
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js/js.translator/src/org/jetbrains/k2js/translate/intrinsic/operation/EqualsIntrinsic.java
+18
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@@ -16,16 +16,22 @@
package org.jetbrains.k2js.translate.intrinsic.operation;
import com.google.dart.compiler.backend.js.ast.JsBinaryOperation;
import com.google.dart.compiler.backend.js.ast.JsBinaryOperator;
import com.google.dart.compiler.backend.js.ast.JsExpression;
import com.google.dart.compiler.backend.js.ast.JsLiteral;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.jet.lang.descriptors.FunctionDescriptor;
import org.jetbrains.jet.lang.psi.JetBinaryExpression;
import org.jetbrains.jet.lang.resolve.name.Name;
import org.jetbrains.jet.lang.types.expressions.OperatorConventions;
import org.jetbrains.jet.lexer.JetTokens;
import org.jetbrains.k2js.translate.context.TranslationContext;
import org.jetbrains.k2js.translate.intrinsic.functions.factories.TopLevelFIF;
import org.jetbrains.k2js.translate.intrinsic.functions.patterns.NamePredicate;
import org.jetbrains.k2js.translate.utils.JsAstUtils;
import org.jetbrains.k2js.translate.utils.JsDescriptorUtils;
import org.jetbrains.k2js.translate.utils.TranslationUtils;
import java.util.Arrays;
@@ -54,7 +60,19 @@ public final class EqualsIntrinsic implements BinaryOperationIntrinsic {
@NotNull JsExpression right,
@NotNull TranslationContext context) {
boolean isNegated = getOperationToken(expression).equals(JetTokens.EXCLEQ);
if (right == JsLiteral.NULL || left == JsLiteral.NULL) {
return TranslationUtils.nullCheck(right == JsLiteral.NULL ? left : right, isNegated);
}
else if (canUseSimpleEquals(expression, context)) {
return new JsBinaryOperation(isNegated ? JsBinaryOperator.REF_NEQ : JsBinaryOperator.REF_EQ, left, right);
}
JsExpression result = TopLevelFIF.EQUALS.apply(left, Arrays.asList(right), context);
return isNegated ? JsAstUtils.negated(result) : result;
}
private static boolean canUseSimpleEquals(@NotNull JetBinaryExpression expression, @NotNull TranslationContext context) {
Name typeName = JsDescriptorUtils.getNameIfStandardType(expression.getLeft(), context);
return typeName != null && NamePredicate.PRIMITIVE_NUMBERS.apply(typeName);
}
}