/*
***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (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.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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package org.jruby.parser;
import org.jcodings.Encoding;
import org.jruby.RubyRegexp;
import org.jruby.ast.AssignableNode;
import org.jruby.ast.ClassVarAsgnNode;
import org.jruby.ast.ConstDeclNode;
import org.jruby.ast.DRegexpNode;
import org.jruby.ast.DStrNode;
import org.jruby.ast.GlobalAsgnNode;
import org.jruby.ast.InstAsgnNode;
import org.jruby.ast.Match2CaptureNode;
import org.jruby.ast.Match2Node;
import org.jruby.ast.Match3Node;
import org.jruby.ast.Node;
import org.jruby.ast.RegexpNode;
import org.jruby.ast.SValue19Node;
import org.jruby.ast.SValueNode;
import org.jruby.ast.Splat19Node;
import org.jruby.ast.SplatNode;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.lexer.yacc.RubyYaccLexer;
import org.jruby.lexer.yacc.SyntaxException;
import org.jruby.lexer.yacc.SyntaxException.PID;
import org.jruby.lexer.yacc.Token;
import org.jruby.util.ByteList;
import org.jruby.util.RegexpOptions;
import org.jruby.util.StringSupport;
public class ParserSupport19 extends ParserSupport {
@Override
public AssignableNode assignable(Token lhs, Node value) {
checkExpression(value);
switch (lhs.getType()) {
case Tokens.kSELF:
throw new SyntaxException(PID.CANNOT_CHANGE_SELF, lhs.getPosition(),
lexer.getCurrentLine(), "Can't change the value of self");
case Tokens.kNIL:
throw new SyntaxException(PID.INVALID_ASSIGNMENT, lhs.getPosition(),
lexer.getCurrentLine(), "Can't assign to nil", "nil");
case Tokens.kTRUE:
throw new SyntaxException(PID.INVALID_ASSIGNMENT, lhs.getPosition(),
lexer.getCurrentLine(), "Can't assign to true", "true");
case Tokens.kFALSE:
throw new SyntaxException(PID.INVALID_ASSIGNMENT, lhs.getPosition(),
lexer.getCurrentLine(), "Can't assign to false", "false");
case Tokens.k__FILE__:
throw new SyntaxException(PID.INVALID_ASSIGNMENT, lhs.getPosition(),
lexer.getCurrentLine(), "Can't assign to __FILE__", "__FILE__");
case Tokens.k__LINE__:
throw new SyntaxException(PID.INVALID_ASSIGNMENT, lhs.getPosition(),
lexer.getCurrentLine(), "Can't assign to __LINE__", "__LINE__");
case Tokens.k__ENCODING__:
throw new SyntaxException(PID.INVALID_ASSIGNMENT, lhs.getPosition(),
lexer.getCurrentLine(), "Can't assign to __ENCODING__", "__ENCODING__");
case Tokens.tIDENTIFIER:
// ENEBO: 1.9 has CURR nodes for local/block variables. We don't. I believe we follow proper logic
return currentScope.assign(lhs.getPosition(), (String) lhs.getValue(), makeNullNil(value));
case Tokens.tCONSTANT:
if (isInDef() || isInSingle()) {
throw new SyntaxException(PID.DYNAMIC_CONSTANT_ASSIGNMENT, lhs.getPosition(),
lexer.getCurrentLine(), "dynamic constant assignment");
}
return new ConstDeclNode(lhs.getPosition(), (String) lhs.getValue(), null, value);
case Tokens.tIVAR:
return new InstAsgnNode(lhs.getPosition(), (String) lhs.getValue(), value);
case Tokens.tCVAR:
return new ClassVarAsgnNode(lhs.getPosition(), (String) lhs.getValue(), value);
case Tokens.tGVAR:
return new GlobalAsgnNode(lhs.getPosition(), (String) lhs.getValue(), value);
}
throw new SyntaxException(PID.BAD_IDENTIFIER, lhs.getPosition(), lexer.getCurrentLine(),
"identifier " + (String) lhs.getValue() + " is not valid to set", lhs.getValue());
}
@Override
public DStrNode createDStrNode(ISourcePosition position) {
return new DStrNode(position, lexer.getEncoding());
}
@Override
protected void getterIdentifierError(ISourcePosition position, String identifier) {
throw new SyntaxException(PID.BAD_IDENTIFIER, position, "identifier " +
identifier + " is not valid to get", identifier);
}
@Override
public SplatNode newSplatNode(ISourcePosition position, Node node) {
return new Splat19Node(position, makeNullNil(node));
}
@Override
public SValueNode newSValueNode(ISourcePosition position, Node node) {
return new SValue19Node(position, node);
}
private int[] allocateNamedLocals(RegexpNode regexpNode) {
String[] names = regexpNode.loadPattern(configuration.getRuntime()).getNames();
int length = names.length;
int[] locals = new int[length];
StaticScope scope = getCurrentScope();
for (int i = 0; i < length; i++) {
// TODO: Pass by non-local-varnamed things but make sure consistent with list we get from regexp
int slot = scope.isDefined(names[i]);
if (slot >= 0) {
locals[i] = slot;
} else {
locals[i] = getCurrentScope().addVariableThisScope(names[i]);
}
}
return locals;
}
private boolean is7BitASCII(ByteList value) {
return StringSupport.codeRangeScan(value.getEncoding(), value) == StringSupport.CR_7BIT;
}
public void setRegexpEncoding(RegexpNode end, ByteList value) {
RegexpOptions options = end.getOptions();
Encoding optionsEncoding = options.setup19(configuration.getRuntime()) ;
// Change encoding to one specified by regexp options as long as the string is compatible.
if (optionsEncoding != null) {
if (optionsEncoding != value.getEncoding() && !is7BitASCII(value)) {
compileError(optionsEncoding, value.getEncoding());
}
value.setEncoding(optionsEncoding);
} else if (options.isEncodingNone()) {
if (value.getEncoding() == RubyYaccLexer.ASCII8BIT_ENCODING && !is7BitASCII(value)) {
compileError(optionsEncoding, value.getEncoding());
}
value.setEncoding(RubyYaccLexer.ASCII8BIT_ENCODING);
} else if (lexer.getEncoding() == RubyYaccLexer.USASCII_ENCODING) {
if (!is7BitASCII(value)) {
value.setEncoding(RubyYaccLexer.USASCII_ENCODING); // This will raise later
} else {
value.setEncoding(RubyYaccLexer.ASCII8BIT_ENCODING);
}
}
}
// TODO: Put somewhere more consolidated (similiar
private char optionsEncodingChar(Encoding optionEncoding) {
if (optionEncoding == RubyYaccLexer.USASCII_ENCODING) return 'n';
if (optionEncoding == org.jcodings.specific.EUCJPEncoding.INSTANCE) return 'e';
if (optionEncoding == org.jcodings.specific.SJISEncoding.INSTANCE) return 's';
if (optionEncoding == RubyYaccLexer.UTF8_ENCODING) return 'u';
return ' ';
}
protected void compileError(Encoding optionEncoding, Encoding encoding) {
throw new SyntaxException(PID.REGEXP_ENCODING_MISMATCH, lexer.getPosition(), lexer.getCurrentLine(),
"regexp encoding option '" + optionsEncodingChar(optionEncoding) +
"' differs from source encoding '" + encoding + "'");
}
@Override
public void regexpFragmentCheck(RegexpNode end, ByteList value) {
setRegexpEncoding(end, value);
RubyRegexp.preprocessCheck(configuration.getRuntime(), value);
}
@Override
public Node getMatchNode(Node firstNode, Node secondNode) {
if (firstNode instanceof DRegexpNode) {
return new Match2Node(firstNode.getPosition(), firstNode, secondNode);
} else if (firstNode instanceof RegexpNode) {
int[] locals = allocateNamedLocals((RegexpNode) firstNode);
if (locals.length > 0) {
return new Match2CaptureNode(firstNode.getPosition(), firstNode, secondNode, locals);
} else {
return new Match2Node(firstNode.getPosition(), firstNode, secondNode);
}
} else if (secondNode instanceof DRegexpNode || secondNode instanceof RegexpNode) {
return new Match3Node(firstNode.getPosition(), secondNode, firstNode);
}
return getOperatorCallNode(firstNode, "=~", secondNode);
}
}