private Parser(Tokenizer tokenizer, ErrorSink errorSink, PythonLanguageVersion langVersion, bool verbatim, bool bindRefs, string privatePrefix) {
Contract.Assert(tokenizer != null);
Contract.Assert(errorSink != null);
tokenizer.ErrorSink = new TokenizerErrorSink(this);
_tokenizer = tokenizer;
_errors = errorSink;
_langVersion = langVersion;
_verbatim = verbatim;
_bindReferences = bindRefs;
if (langVersion.Is3x()) {
// 3.x always does true division and absolute import
_languageFeatures |= FutureOptions.TrueDivision | FutureOptions.AbsoluteImports;
}
Reset(FutureOptions.None);
_privatePrefix = privatePrefix;
}
public void Reset(FutureOptions languageFeatures) {
_languageFeatures = languageFeatures;
_token = new TokenWithSpan();
_lookahead = new TokenWithSpan();
_fromFutureAllowed = true;
_classDepth = 0;
_functions = null;
_privatePrefix = null;
_parsingStarted = false;
_errorCode = 0;
}
override public Future <TResult> Start(FutureOptions options)
{
return(new Future <TResult>(this._byusingsupervised, options));
}
private bool ProcessFutureStatements(int start, NameExpression/*!*/[] names, bool fromFuture) {
if (!_fromFutureAllowed) {
ReportSyntaxError(start, GetEnd(), "from __future__ imports must occur at the beginning of the file");
}
if (names.Length == 1 && names[0].Name == "*") {
ReportSyntaxError(start, GetEnd(), "future statement does not support import *");
}
fromFuture = true;
foreach (var name in names) {
if (name.Name == "nested_scopes") {
// v2.4
} else if (name.Name == "division") {
_languageFeatures |= FutureOptions.TrueDivision;
} else if (name.Name == "generators") {
// v2.5:
} else if (_langVersion >= PythonLanguageVersion.V25 && name.Name == "with_statement") {
_languageFeatures |= FutureOptions.WithStatement;
_tokenizer.WithStatement = true;
} else if (_langVersion >= PythonLanguageVersion.V25 && name.Name == "absolute_import") {
_languageFeatures |= FutureOptions.AbsoluteImports;
// v2.6:
} else if (_langVersion >= PythonLanguageVersion.V26 && name.Name == "print_function") {
_languageFeatures |= FutureOptions.PrintFunction;
_tokenizer.PrintFunction = true;
} else if (_langVersion >= PythonLanguageVersion.V26 && name.Name == "unicode_literals") {
_tokenizer.UnicodeLiterals = true;
_languageFeatures |= FutureOptions.UnicodeLiterals;
// v3.5:
} else if (_langVersion >= PythonLanguageVersion.V35 && name.Name == "generator_stop") {
// No behavior change, but we don't want to display an error
} else {
string strName = name.Name;
if (strName != "braces") {
ReportSyntaxError(start, GetEnd(), "future feature is not defined: " + strName);
} else {
// match CPython error message
ReportSyntaxError(start, GetEnd(), "not a chance");
}
}
}
return fromFuture;
}
virtual public Future <TResult> Start(FutureOptions options)
{
return(new Future <TResult>(this._byusing, options));
}
