internal static expr Convert(Compiler.Ast.Expression expr, expr_context ctx) {
expr ast;
if (expr is ConstantExpression)
ast = Convert((ConstantExpression)expr);
else if (expr is NameExpression)
ast = new Name((NameExpression)expr, ctx);
else if (expr is UnaryExpression)
ast = new UnaryOp((UnaryExpression)expr);
else if (expr is BinaryExpression)
ast = Convert((BinaryExpression)expr);
else if (expr is AndExpression)
ast = new BoolOp((AndExpression)expr);
else if (expr is OrExpression)
ast = new BoolOp((OrExpression)expr);
else if (expr is CallExpression)
ast = new Call((CallExpression)expr);
else if (expr is ParenthesisExpression)
return Convert(((ParenthesisExpression)expr).Expression);
else if (expr is LambdaExpression)
ast = new Lambda((LambdaExpression)expr);
else if (expr is ListExpression)
ast = new List((ListExpression)expr, ctx);
else if (expr is TupleExpression)
ast = new Tuple((TupleExpression)expr, ctx);
else if (expr is DictionaryExpression)
ast = new Dict((DictionaryExpression)expr);
else if (expr is ListComprehension)
ast = new ListComp((ListComprehension)expr);
else if (expr is GeneratorExpression)
ast = new GeneratorExp((GeneratorExpression)expr);
else if (expr is MemberExpression)
ast = new Attribute((MemberExpression)expr, ctx);
else if (expr is YieldExpression)
ast = new Yield((YieldExpression)expr);
else if (expr is ConditionalExpression)
ast = new IfExp((ConditionalExpression)expr);
else if (expr is IndexExpression)
ast = new Subscript((IndexExpression)expr, ctx);
else if (expr is SliceExpression)
ast = new Slice((SliceExpression)expr);
else if (expr is BackQuoteExpression)
ast = new Repr((BackQuoteExpression)expr);
else
throw new ArgumentTypeException("Unexpected expression type: " + expr.GetType());
ast.GetSourceLocation(expr);
return ast;
}
internal Attribute(MemberExpression attr, expr_context ctx)
: this() {
_value = Convert(attr.Target);
_attr = attr.Name;
_ctx = ctx;
}
internal Subscript(IndexExpression expr, expr_context ctx)
: this() {
_value = Convert(expr.Target);
AST index = Convert(expr.Index);
if (index is expr)
if (index is Tuple && ((TupleExpression)expr.Index).IsExpandable)
_slice = new ExtSlice(((Tuple)index).elts);
else
_slice = new Index((expr)index);
else if (index is slice) // includes Ellipsis
_slice = (slice)index;
else
throw new ArgumentTypeException("Unexpected index expression: " + expr.Index.GetType());
_ctx = ctx;
}
internal Tuple(TupleExpression list, expr_context ctx)
: this() {
_elts = PythonOps.MakeEmptyList(list.Items.Count);
foreach (Compiler.Ast.Expression expr in list.Items)
_elts.Add(Convert(expr, ctx));
_ctx = ctx;
}
internal Name(NameExpression expr, expr_context ctx)
: this(expr.Name, ctx) {
}
internal Name(string id, expr_context ctx)
: this() {
_id = id;
_ctx = ctx;
}
public Tuple(PythonList elts, expr_context ctx, [Optional]int? lineno, [Optional]int? col_offset)
: this()
{
_elts = elts;
_ctx = ctx;
_lineno = lineno;
_col_offset = col_offset;
}
public Attribute(expr value, string attr, expr_context ctx,
[Optional]int? lineno, [Optional]int? col_offset)
: this()
{
_value = value;
_attr = attr;
_ctx = ctx;
_lineno = lineno;
_col_offset = col_offset;
}
internal Subscript(IndexExpression expr, expr_context ctx)
: this()
{
_value = Convert(expr.Target);
_ctx = ctx;
_slice = TrySliceConvert(expr.Index);
if (_slice == null)
_slice = new Index(Convert(expr.Index));
}
public Subscript( expr value, slice slice, expr_context ctx,
[Optional]int? lineno, [Optional]int? col_offset )
: this()
{
_value = value;
_slice = slice;
_ctx = ctx;
_lineno = lineno;
_col_offset = col_offset;
}
internal Name(NameExpression expr, expr_context ctx)
: this(expr.Name, ctx)
{
GetSourceLocation(expr);
}
public Name(String id, expr_context ctx)
: this(id, ctx, null, null)
{
}
public Name(string id, expr_context ctx, [Optional]int? lineno, [Optional]int? col_offset)
: this()
{
_id = id;
_ctx = ctx;
_lineno = lineno;
_col_offset = col_offset;
}
