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https://github.com/carbon-language/carbon-lang.git
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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.
69 lines
2.0 KiB
C++
69 lines
2.0 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_NODES_FUNCTION_H_
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#define CARBON_TOOLCHAIN_SEMANTICS_NODES_FUNCTION_H_
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#include "common/ostream.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include "toolchain/parser/parse_tree.h"
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#include "toolchain/semantics/node_kind.h"
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#include "toolchain/semantics/node_ref.h"
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namespace Carbon::Semantics {
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// Represents `fn name(params...) [-> return_expr] body`.
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class Function {
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public:
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static constexpr NodeKind Kind = NodeKind::Function;
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Function(ParseTree::Node node, int32_t id,
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// llvm::SmallVector<PatternBinding, 0> params,
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// llvm::SmallVector<NodeRef, 0> return_type,
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llvm::SmallVector<NodeRef, 0> body)
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: node_(node),
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id_(id),
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// params_(std::move(params)),
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// return_expr_(return_expr),
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body_(std::move(body)) {}
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void Print(llvm::raw_ostream& out,
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std::function<void(NodeRef)> print_node_ref) const {
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out << "Function(%" << id_ << ", {";
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llvm::ListSeparator sep(", ");
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for (auto& node_ref : body_) {
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out << sep;
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print_node_ref(node_ref);
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}
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out << "})";
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}
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auto node() const -> ParseTree::Node { return node_; }
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auto id() const -> int32_t { return id_; }
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// auto params() const -> llvm::ArrayRef<PatternBinding> { return params_; }
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// auto return_expr() const -> llvm::Optional<Statement> { return
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// return_expr_; }
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auto body() const -> llvm::ArrayRef<NodeRef> { return body_; }
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private:
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// The FunctionDeclaration node.
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ParseTree::Node node_;
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// The function's ID.
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int32_t id_;
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// Regular function parameters.
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// llvm::SmallVector<PatternBinding, 0> params_;
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// The return type expression.
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llvm::SmallVector<NodeRef, 0> return_type_;
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llvm::SmallVector<NodeRef, 0> body_;
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};
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} // namespace Carbon::Semantics
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#endif // CARBON_TOOLCHAIN_SEMANTICS_NODES_FUNCTION_H_
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