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[lang] Add @pure annotation on no-side-effect actions.
see #191 Signed-off-by: Stéphane Galland <galland@arakhne.org>
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72 changes: 72 additions & 0 deletions
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plugins/io.sarl.lang/src/io/sarl/lang/typing/ExtendedXExpressionHelper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* | ||
| * $Id$ | ||
| * | ||
| * SARL is an general-purpose agent programming language. | ||
| * More details on http://www.sarl.io | ||
| * | ||
| * Copyright (C) 2014-2015 the original authors or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package io.sarl.lang.typing; | ||
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| import java.util.regex.Pattern; | ||
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| import com.google.inject.Inject; | ||
| import com.google.inject.Singleton; | ||
| import org.eclipse.xtext.common.types.JvmOperation; | ||
| import org.eclipse.xtext.xbase.XExpression; | ||
| import org.eclipse.xtext.xbase.lib.Pure; | ||
| import org.eclipse.xtext.xbase.util.XExpressionHelper; | ||
|
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| /** | ||
| * Extended helper on expressions. | ||
| * | ||
| * @author $Author: sgalland$ | ||
| * @version $FullVersion$ | ||
| * @mavengroupid $GroupId$ | ||
| * @mavenartifactid $ArtifactId$ | ||
| * @see SARLXExpressionHelper | ||
| */ | ||
| @Singleton | ||
| public class ExtendedXExpressionHelper { | ||
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| @Inject | ||
| private XExpressionHelper expressionHelper; | ||
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| private final Pattern pattern; | ||
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| /** Construct the helper. | ||
| */ | ||
| public ExtendedXExpressionHelper() { | ||
| this.pattern = Pattern.compile(XExpressionConstants.SPECIAL_PURE_FUNCTION_NAME_PATTERN); | ||
| } | ||
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| /** Check if the given operation could be annoted with "@Pure". | ||
| * | ||
| * @param operation - the operation to test. | ||
| * @param body - the body of the operation. | ||
| * @return <code>true</code> if one of the components of the given expression has a side effect; | ||
| * otherwise <code>false</code>. | ||
| * @see Pure | ||
| */ | ||
| public boolean isPureOperation(JvmOperation operation, XExpression body) { | ||
| if (operation == null || operation.isAbstract() || body == null) { | ||
| return false; | ||
| } | ||
| String name = operation.getSimpleName(); | ||
| return (name != null && this.pattern.matcher(name).find()) || !this.expressionHelper.hasSideEffects(body); | ||
| } | ||
|
|
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| } |
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47
plugins/io.sarl.lang/src/io/sarl/lang/typing/XExpressionConstants.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| /* | ||
| * $Id$ | ||
| * | ||
| * SARL is an general-purpose agent programming language. | ||
| * More details on http://www.sarl.io | ||
| * | ||
| * Copyright (C) 2014-2015 the original authors or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package io.sarl.lang.typing; | ||
|
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| import com.google.inject.Singleton; | ||
|
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| /** | ||
| * Constants used by the XExpression helpers. | ||
| * | ||
| * @author $Author: sgalland$ | ||
| * @version $FullVersion$ | ||
| * @mavengroupid $GroupId$ | ||
| * @mavenartifactid $ArtifactId$ | ||
| * @see SARLXExpressionHelper | ||
| */ | ||
| @Singleton | ||
| public final class XExpressionConstants { | ||
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| /** Regular expression pattern that matches the names of functions usually | ||
| * considered as pure. | ||
| */ | ||
| public static final String SPECIAL_PURE_FUNCTION_NAME_PATTERN = "^(((is)|(get)|(has))[A-Z].*)|(equals)|(hashCode)|(clone)|(toString)$"; //$NON-NLS-1$; | ||
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| private XExpressionConstants() { | ||
| // | ||
| } | ||
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| } |
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