com.oracle.truffle.sl.nodes.controlflow.SLFunctionBodyNode Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of truffle-sl Show documentation
Show all versions of truffle-sl Show documentation
Truffle SL is an example language implemented using the Truffle API.
The newest version!
/*
* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
* freely licensable by each licensor hereunder covering either (i) the
* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
*
* without restriction, including without limitation the rights to copy, create
* derivative works of, display, perform, and distribute the Software and make,
* use, sell, offer for sale, import, export, have made, and have sold the
* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.oracle.truffle.sl.nodes.controlflow;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.NodeInfo;
import com.oracle.truffle.api.profiles.BranchProfile;
import com.oracle.truffle.sl.nodes.SLExpressionNode;
import com.oracle.truffle.sl.nodes.SLRootNode;
import com.oracle.truffle.sl.nodes.SLStatementNode;
import com.oracle.truffle.sl.runtime.SLNull;
/**
* The body of a user-defined SL function. This is the node referenced by a {@link SLRootNode} for
* user-defined functions. It handles the return value of a function: the {@link SLReturnNode return
* statement} throws an {@link SLReturnException exception} with the return value. This node catches
* the exception. If the method ends without an explicit {@code return}, return the
* {@link SLNull#SINGLETON default null value}.
*/
@NodeInfo(shortName = "body")
public final class SLFunctionBodyNode extends SLExpressionNode {
/** The body of the function. */
@Child private SLStatementNode bodyNode;
/**
* Profiling information, collected by the interpreter, capturing whether the function had an
* {@link SLReturnNode explicit return statement}. This allows the compiler to generate better
* code.
*/
private final BranchProfile exceptionTaken = BranchProfile.create();
private final BranchProfile nullTaken = BranchProfile.create();
public SLFunctionBodyNode(SLStatementNode bodyNode) {
this.bodyNode = bodyNode;
addRootTag();
}
@Override
public Object executeGeneric(VirtualFrame frame) {
try {
/* Execute the function body. */
bodyNode.executeVoid(frame);
} catch (SLReturnException ex) {
/*
* In the interpreter, record profiling information that the function has an explicit
* return.
*/
exceptionTaken.enter();
/* The exception transports the actual return value. */
return ex.getResult();
}
/*
* In the interpreter, record profiling information that the function ends without an
* explicit return.
*/
nullTaken.enter();
/* Return the default null value. */
return SLNull.SINGLETON;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy