// 'from' relative_module 'import' identifier ['as' name] (',' identifier ['as' name]) *
// 'from' relative_module 'import' '(' identifier ['as' name] (',' identifier ['as' name])* [','] ')'
// 'from' module 'import' "*"
private FromImportStatement ParseFromImportStmt() {
Eat(TokenKind.KeywordFrom);
SourceLocation start = GetStart();
ModuleName dname = ParseRelativeModuleName();
Eat(TokenKind.KeywordImport);
bool ateParen = MaybeEat(TokenKind.LeftParenthesis);
SymbolId[] names;
SymbolId[] asNames;
bool fromFuture = false;
if (MaybeEat(TokenKind.Multiply)) {
names = FromImportStatement.Star;
asNames = null;
if (dname is RelativeModuleName) {
ReportSyntaxError("'import *' not allowed with 'from .'");
}
} else {
List<SymbolId> l = new List<SymbolId>();
List<SymbolId> las = new List<SymbolId>();
if (MaybeEat(TokenKind.LeftParenthesis)) {
ParseAsNameList(l, las);
Eat(TokenKind.RightParenthesis);
} else {
ParseAsNameList(l, las);
}
names = l.ToArray();
asNames = las.ToArray();
}
// Process from __future__ statement
if (dname.Names.Count == 1 && dname.Names[0] == Symbols.Future) {
if (!_fromFutureAllowed) {
ReportSyntaxError(IronPython.Resources.MisplacedFuture);
}
if (names == FromImportStatement.Star) {
ReportSyntaxError(IronPython.Resources.NoFutureStar);
}
fromFuture = true;
foreach (SymbolId name in names) {
if (name == Symbols.Division) {
_languageFeatures |= PythonLanguageFeatures.TrueDivision;
} else if (name == Symbols.WithStmt) {
_languageFeatures |= PythonLanguageFeatures.AllowWithStatement;
} else if (name == Symbols.AbsoluteImport) {
_languageFeatures |= PythonLanguageFeatures.AbsoluteImports;
} else if (name == Symbols.PrintFunction && Python26) {
_languageFeatures |= PythonLanguageFeatures.PrintFunction;
_tokenizer.PrintFunction = true;
} else if (name == Symbols.UnicodeLiterals && Python26) {
// nop for us, just ignore it...
} else if (name == Symbols.NestedScopes) {
} else if (name == Symbols.Generators) {
} else {
string strName = SymbolTable.IdToString(name);
fromFuture = false;
if (strName != "braces") {
ReportSyntaxError(IronPython.Resources.UnknownFutureFeature + strName);
} else {
// match CPython error message
ReportSyntaxError(IronPython.Resources.NotAChance);
}
}
}
}
if (ateParen) {
Eat(TokenKind.RightParenthesis);
}
FromImportStatement ret = new FromImportStatement(dname, names, asNames, fromFuture, AbsoluteImports);
ret.SetLoc(start, GetEnd());
return ret;
}
// 'from' relative_module 'import' identifier ['as' name] (',' identifier ['as' name]) *
// 'from' relative_module 'import' '(' identifier ['as' name] (',' identifier ['as' name])* [','] ')'
// 'from' module 'import' "*"
private FromImportStatement ParseFromImportStmt() {
Eat(TokenKind.KeywordFrom);
var start = GetStart();
ModuleName dname = ParseRelativeModuleName();
Eat(TokenKind.KeywordImport);
bool ateParen = MaybeEat(TokenKind.LeftParenthesis);
string[] names;
string[] asNames;
bool fromFuture = false;
if (MaybeEat(TokenKind.Multiply)) {
names = (string[])FromImportStatement.Star;
asNames = null;
} else {
List<string> l = new List<string>();
List<string> las = new List<string>();
if (MaybeEat(TokenKind.LeftParenthesis)) {
ParseAsNameList(l, las);
Eat(TokenKind.RightParenthesis);
} else {
ParseAsNameList(l, las);
}
names = l.ToArray();
asNames = las.ToArray();
}
// Process from __future__ statement
if (dname.Names.Count == 1 && dname.Names[0] == "__future__") {
if (!_fromFutureAllowed) {
ReportSyntaxError(IronPython.Resources.MisplacedFuture);
}
if (names == FromImportStatement.Star) {
ReportSyntaxError(IronPython.Resources.NoFutureStar);
}
fromFuture = true;
foreach (string name in names) {
if (name == "division") {
_languageFeatures |= ModuleOptions.TrueDivision;
} else if (name == "with_statement") {
_languageFeatures |= ModuleOptions.WithStatement;
} else if (name == "absolute_import") {
_languageFeatures |= ModuleOptions.AbsoluteImports;
} else if (name == "print_function") {
_languageFeatures |= ModuleOptions.PrintFunction;
_tokenizer.PrintFunction = true;
} else if (name == "unicode_literals") {
_tokenizer.UnicodeLiterals = true;
_languageFeatures |= ModuleOptions.UnicodeLiterals;
} else if (name == "nested_scopes") {
} else if (name == "generators") {
} else {
string strName = name;
fromFuture = false;
if (strName != "braces") {
ReportSyntaxError(IronPython.Resources.UnknownFutureFeature + strName);
} else {
// match CPython error message
ReportSyntaxError(IronPython.Resources.NotAChance);
}
}
}
}
if (ateParen) {
Eat(TokenKind.RightParenthesis);
}
FromImportStatement ret = new FromImportStatement(dname, (string[])names, asNames, fromFuture, AbsoluteImports);
ret.SetLoc(_globalParent, start, GetEnd());
return ret;
}
//| 'from' dotted_name 'import' ('*' | as_name_list | '(' as_name_list ')' )
private FromImportStatement ParseFromImportStmt()
{
Eat(TokenKind.KeywordFrom);
Location start = GetStart();
DottedName dname = ParseDottedName();
Eat(TokenKind.KeywordImport);
IList<SymbolId> names;
IList<SymbolId> asNames;
bool fromFuture = false;
if (MaybeEat(TokenKind.Multiply)) {
names = FromImportStatement.Star;
asNames = null;
} else {
List<SymbolId> l = new List<SymbolId>();
List<SymbolId> las = new List<SymbolId>();
if (MaybeEat(TokenKind.LeftParenthesis)) {
ParseAsNameList(l, las);
Eat(TokenKind.RightParenthesis);
} else {
ParseAsNameList(l, las);
}
names = l.ToArray();
asNames = las.ToArray();
}
// Process from __future__ statement
if (dname.Names.Count == 1 && dname.Names[0] == SymbolTable.Future) {
if (!fromFutureAllowed) {
ReportSyntaxError("from __future__ imports must occur at the beginning of the file");
}
if (names == FromImportStatement.Star) {
ReportSyntaxError("future statement does not support import *");
}
fromFuture = true;
foreach (SymbolId name in names) {
if (name == SymbolTable.Division) {
context.TrueDivision = true;
} else if (Options.Python25 && name == SymbolTable.WithStmt) {
context.AllowWithStatement = true;
} else if (name == SymbolTable.NestedScopes) {
} else if (name == SymbolTable.Generators) {
} else {
fromFuture = false;
ReportSyntaxError(string.Format("future feature is not defined: {0}", name.GetString()));
}
}
}
FromImportStatement ret = new FromImportStatement(dname, names, asNames, fromFuture);
ret.SetLoc(GetExternal(), start, GetEnd());
return ret;
}
