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207b5e2de1
Despite `tint::ast::type::Type` being in the AST namespace, these classes are clearly not AST nodes: * They don't derive from ast::Node * They're deduplicated by the type manager * None of the types have an Source - they have no lexical declaration point * The fact we have `ast::Struct` and `ast::type::Struct` clearly demonstrates what is an AST node, and what is a type. * We have code scattered in the codebase (TypeDeterminer, writers, etc) that create new types after parsing - so clearly not part of the original syntax tree. Types in tint are closer to being semantic info, but due to the parse-time generation of types, and tight dependency of ast::Nodes to types, I'd be reluctant to class these as semantic info. Instead, put these into a separate root level `tint::type` namespace and `src/tint` directory. The fact that types exist in the ast::Module has already caused bugs (https://dawn-review.googlesource.com/c/tint/+/37261). This is a first step in separating out types from the ast::Module. Bug: tint:390 Change-Id: I8349bbbd1b19597b8e6d51d5cda0890de46ecaec Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/38002 Commit-Queue: Ben Clayton <bclayton@google.com> Reviewed-by: dan sinclair <dsinclair@chromium.org>
84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
// Copyright 2020 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_AST_NODE_H_
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#define SRC_AST_NODE_H_
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#include <ostream>
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#include <string>
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#include <vector>
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#include "src/castable.h"
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#include "src/source.h"
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namespace tint {
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namespace type {
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class Type;
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}
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namespace ast {
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class Module;
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class CloneContext;
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/// AST base class node
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class Node : public Castable<Node> {
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public:
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~Node() override;
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/// Clones this node and all transitive child nodes using the `CloneContext`
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/// `ctx`.
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/// @note Semantic information such as resolved expression type and intrinsic
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/// information is not cloned.
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/// @param ctx the clone context
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/// @return the newly cloned node
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virtual Node* Clone(CloneContext* ctx) const = 0;
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/// @returns the node source data
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const Source& source() const { return source_; }
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/// @returns true if the node is valid
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virtual bool IsValid() const = 0;
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/// Writes a representation of the node to the output stream
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/// @param out the stream to write to
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/// @param indent number of spaces to indent the node when writing
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virtual void to_str(std::ostream& out, size_t indent) const = 0;
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/// Convenience wrapper around the to_str() method.
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/// @returns the node as a string
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std::string str() const;
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protected:
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/// Create a new node
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/// @param source the input source for the node
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explicit Node(const Source& source);
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/// Move constructor
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Node(Node&&);
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/// Writes indent into stream
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/// @param out the stream to write to
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/// @param indent the number of spaces to write
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void make_indent(std::ostream& out, size_t indent) const;
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private:
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Node(const Node&) = delete;
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Source const source_;
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};
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} // namespace ast
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} // namespace tint
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#endif // SRC_AST_NODE_H_
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