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Jon Ross-Perkins
a23f15e901
This is how I'm interpreting discussion:
- Basic elements are getting set to an ID.
- SetName exists to assign a name (which can then be referred to later with an identifier expression) to an ID.
- Expressions are broken down into a series of operations which operate on IDs.
So with something like the last test:
```
fn Main() { return 12 + 34; }
```
This becomes:
```
Function(%0,
{IntegerLiteral(%3, 12),
IntegerLiteral(%2, 34),
BinaryOperator(%1, +, %3, %2),
Return(%1),
})
SetName(`Main`, %0)
```
Note I'm treating blocks as fairly equal to the top of a file now, and basically eliminating boundaries between things. That's because we have discussed also supporting code like:
```
fn Foo() {
fn Bar() {}
Bar();
}
```
Here a declaration of a function is occurring inside a code block, so it felt like eliminating the difference was the best choice.
I know you'd commented on the separation of nodes to individual files before; I still think we're going to have a lot of different types of nodes, and so separating them out into individual files makes them easier to browse.
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef CARBON_TOOLCHAIN_SEMANTICS_NODE_REF_H_
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#define CARBON_TOOLCHAIN_SEMANTICS_NODE_REF_H_
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#include <cstdint>
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#include "common/ostream.h"
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#include "toolchain/semantics/node_kind.h"
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namespace Carbon::Semantics {
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// The standard structure for nodes.
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//
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// This flyweight pattern is used so that each subtype can be stored in its own
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// vector, minimizing memory consumption and heap fragmentation when large
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// quantities are being created.
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class NodeRef {
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public:
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NodeRef() : NodeRef(NodeKind::Invalid, -1) {}
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auto kind() -> NodeKind { return kind_; }
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private:
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template <typename... StoredNodeT>
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friend class NodeStoreBase;
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NodeRef(NodeKind kind, int32_t index) : kind_(kind), index_(index) {}
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NodeKind kind_;
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// The index of the named entity within its list.
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int32_t index_;
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};
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} // namespace Carbon::Semantics
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#endif // CARBON_TOOLCHAIN_SEMANTICS_NODE_REF_H_
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