1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/frontend/FoldConstants.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,41 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef frontend_FoldConstants_h
1.11 +#define frontend_FoldConstants_h
1.12 +
1.13 +#include "frontend/SyntaxParseHandler.h"
1.14 +
1.15 +namespace js {
1.16 +namespace frontend {
1.17 +
1.18 +// Perform constant folding on the given AST. For example, the program
1.19 +// `print(2 + 2)` would become `print(4)`.
1.20 +//
1.21 +// pnp is the address of a pointer variable that points to the root node of the
1.22 +// AST. On success, *pnp points to the root node of the new tree, which may be
1.23 +// the same node (unchanged or modified in place) or a new node.
1.24 +//
1.25 +// Usage:
1.26 +// pn = parser->statement();
1.27 +// if (!pn)
1.28 +// return false;
1.29 +// if (!FoldConstants(cx, &pn, parser))
1.30 +// return false;
1.31 +bool
1.32 +FoldConstants(ExclusiveContext *cx, ParseNode **pnp, Parser<FullParseHandler> *parser);
1.33 +
1.34 +inline bool
1.35 +FoldConstants(ExclusiveContext *cx, SyntaxParseHandler::Node *pnp,
1.36 + Parser<SyntaxParseHandler> *parser)
1.37 +{
1.38 + return true;
1.39 +}
1.40 +
1.41 +} /* namespace frontend */
1.42 +} /* namespace js */
1.43 +
1.44 +#endif /* frontend_FoldConstants_h */
