Mercurial > hg > truffle
view graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/expression/Expression.atg @ 19283:08aa0372dad4
Truffle-DSL: implement new guard expression syntax.
author | Christian Humer <christian.humer@gmail.com> |
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date | Fri, 23 Jan 2015 02:55:23 +0100 |
parents | |
children | 62c43fcf5be2 |
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/* * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * This is the grammar for DSL expressions that is used to automatically generate the Parser.java and Scanner.java * files. You can download the parser generator Coco/R from http://ssw.jku.at/coco/. Then run * "java -jar Coco.jar Expression.atg" */ COMPILER Expression CHARACTERS letter = 'A'..'Z' + 'a'..'z'. nonZeroDigit = "123456789". digit = "0123456789". TOKENS identifier = letter {letter | digit}. numericLiteral = "0" | nonZeroDigit { digit }. PRAGMAS PRODUCTIONS Expression<out DSLExpression result> = NegateFactor<out result> . NegateFactor<out DSLExpression result> = (. boolean negated = false; .) [ "!" (. negated = true; .) ] LogicFactor<out result> (. result = negated ? new Negate(result) : result;.) . LogicFactor<out DSLExpression result> = Factor<out result> [ ("<" | "<=" | ">" | ">=" | "==" | "!=" ) (. Token op = t; .) Factor<out DSLExpression right> (. result = new Binary(op.val, result, right); .) ] . Factor<out DSLExpression result> = (. result = null; .) ( MemberExpression<out result, result> | numericLiteral (. result = new IntLiteral(t.val); .) | "(" Expression<out result> ")" ) . MemberExpression<out DSLExpression result, DSLExpression receiver> = (. result = null; .) ( identifier (. Variable variable = new Variable(receiver, t.val); .) (. result = variable; .) [ "(" (. List<DSLExpression> parameters = new ArrayList<>(); DSLExpression parameter; .) [ Expression<out parameter> (. parameters.add(parameter); .) { "," Expression<out parameter> (. parameters.add(parameter); .) } ] ")" (. result = new Call(variable.getReceiver(), variable.getName(), parameters); .) ] ) [ "." MemberExpression<out result, result> ] . END Expression.