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/*
* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD 3-clause license that
* can be found in the LICENSE.txt file in the project root.
*/
package org.antlr.v4.codegen.target;
import org.antlr.v4.codegen.CodeGenerator;
import org.antlr.v4.codegen.Target;
import org.antlr.v4.codegen.UnicodeEscapes;
import org.antlr.v4.tool.ast.GrammarAST;
import org.stringtemplate.v4.STGroup;
import org.stringtemplate.v4.StringRenderer;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Locale;
import java.util.Set;
/**
*
* @author Eric Vergnaud
*/
public class Python2Target extends Target {
protected static final String[] python2Keywords = {
"abs", "all", "any", "apply", "as",
"bin", "bool", "buffer", "bytearray",
"callable", "chr", "classmethod", "coerce", "compile", "complex",
"del", "delattr", "dict", "dir", "divmod",
"enumerate", "eval", "execfile",
"file", "filter", "float", "format", "frozenset",
"getattr", "globals",
"hasattr", "hash", "help", "hex",
"id", "input", "int", "intern", "isinstance", "issubclass", "iter",
"len", "list", "locals",
"map", "max", "min", "next",
"memoryview",
"object", "oct", "open", "ord",
"pow", "print", "property",
"range", "raw_input", "reduce", "reload", "repr", "return", "reversed", "round",
"set", "setattr", "slice", "sorted", "staticmethod", "str", "sum", "super",
"tuple", "type",
"unichr", "unicode",
"vars",
"with",
"xrange",
"zip",
"__import__",
"True", "False", "None"
};
/** Avoid grammar symbols in this set to prevent conflicts in gen'd code. */
protected final Set<String> badWords = new HashSet<String>();
public Python2Target(CodeGenerator gen) {
super(gen, "Python2");
}
@Override
protected boolean visibleGrammarSymbolCausesIssueInGeneratedCode(GrammarAST idNode) {
return getBadWords().contains(idNode.getText());
}
@Override
protected STGroup loadTemplates() {
STGroup result = super.loadTemplates();
result.registerRenderer(String.class, new PythonStringRenderer(), true);
return result;
}
protected static class PythonStringRenderer extends StringRenderer {
@Override
public String toString(Object o, String formatString, Locale locale) {
return super.toString(o, formatString, locale);
}
}
@Override
public boolean wantsBaseListener() {
return false;
}
@Override
public boolean wantsBaseVisitor() {
return false;
}
@Override
public boolean supportsOverloadedMethods() {
return false;
}
@Override
public String getVersion() {
return "4.7.1";
}
public Set<String> getBadWords() {
if (badWords.isEmpty()) {
addBadWords();
}
return badWords;
}
protected void addBadWords() {
badWords.addAll(Arrays.asList(python2Keywords));
badWords.add("rule");
badWords.add("parserRule");
}
@Override
protected void appendUnicodeEscapedCodePoint(int codePoint, StringBuilder sb) {
UnicodeEscapes.appendPythonStyleEscapedCodePoint(codePoint, sb);
}
}
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