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28f5f79bb7
Instead, only reference count the SyntaxArena that the RawSyntax nodes live in. The user of RawSyntax nodes must guarantee that the SyntaxArena stays alive as long as the RawSyntax nodes are being accessed. During parse time, the SyntaxTreeCreator holds on to the SyntaxArena in which it creates RawSyntax nodes. When inspecting a syntax tree, the root SyntaxData node keeps the SyntaxArena alive. The change should be mostly invisible to the users of the public libSyntax API. This change significantly decreases the overall reference-counting overhead. Since we were not able to free individual RawSyntax nodes anyway, performing the reference-counting on the level of the SyntaxArena feels natural.
69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
%{
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# -*- mode: C++ -*-
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from gyb_syntax_support import *
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NODE_MAP = create_node_map()
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# Ignore the following admonition; it applies to the resulting .h file only
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}%
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//// Automatically Generated From SyntaxBuilders.h.gyb.
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//// Do Not Edit Directly!
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//===------------- SyntaxBuilders.h - Syntax Node definitions -------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SYNTAX_BUILDERS_H
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#define SWIFT_SYNTAX_BUILDERS_H
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#include "swift/Syntax/RawSyntax.h"
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#include "swift/Syntax/SyntaxNodes.h"
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namespace swift {
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namespace syntax {
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class SyntaxArena;
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% for node in SYNTAX_NODES:
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% if node.is_buildable():
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% child_count = len(node.children)
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class ${node.name}Builder {
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RC<SyntaxArena> Arena;
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const RawSyntax *Layout[${child_count}] = {
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% for child in node.children:
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nullptr,
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% end
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};
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public:
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${node.name}Builder(const RC<SyntaxArena> &Arena) : Arena(Arena) {}
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% for child in node.children:
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${node.name}Builder &use${child.name}(${child.type_name} ${child.name});
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% child_node = NODE_MAP.get(child.syntax_kind)
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% if child_node and child_node.is_syntax_collection():
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% child_elt = child.collection_element_name
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% child_elt_type = child_node.collection_element_type
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% if not child_elt:
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% raise Exception("'collection_element_name' should be set for '%s' of '%s'" % (child.name, node.name))
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% end
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${node.name}Builder &add${child_elt}(${child_elt_type} ${child_elt});
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% end
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% end
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${node.name} build();
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};
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% end
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% end
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}
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}
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#endif // SWIFT_SYNTAX_BUILDERS_H
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