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Geoff RomerandJon Meow
6ac3adfa53
`Pattern` is intended to pilot some changes I would like to apply to all our sum types: - The alternatives are expressed as derived classes rather than members of a `std::variant`. - The alternatives are classes in the [style guide sense](https://google.github.io/styleguide/cppguide.html#Structs_vs._Classes), meaning they can have invariants, but can't have public data members. - Creating an object is expressed using a constructor rather than a factory function. - Accessing an alternative is expressed as a cast (using LLVM's RTTI system) rather than `std::get` or a `Get` method. Co-authored-by: Jon Meow <46229924+jonmeow@users.noreply.github.com>
51 lines
1.7 KiB
C++
51 lines
1.7 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 EXECUTABLE_SEMANTICS_AST_FUNCTION_DEFINITION_H_
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#define EXECUTABLE_SEMANTICS_AST_FUNCTION_DEFINITION_H_
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#include "common/ostream.h"
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#include "executable_semantics/ast/expression.h"
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#include "executable_semantics/ast/pattern.h"
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#include "executable_semantics/ast/statement.h"
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#include "llvm/Support/Compiler.h"
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namespace Carbon {
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// TODO: expand the kinds of things that can be deduced parameters.
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// For now, only generic parameters are supported.
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struct GenericBinding {
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std::string name;
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const Expression* type;
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};
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struct FunctionDefinition {
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FunctionDefinition() = default;
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FunctionDefinition(int line_num, std::string name,
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std::vector<GenericBinding> deduced_params,
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const TuplePattern* param_pattern,
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const Pattern* return_type, const Statement* body)
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: line_num(line_num),
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name(std::move(name)),
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deduced_parameters(deduced_params),
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param_pattern(param_pattern),
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return_type(return_type),
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body(body) {}
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void Print(llvm::raw_ostream& out) const { PrintDepth(-1, out); }
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void PrintDepth(int depth, llvm::raw_ostream& out) const;
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LLVM_DUMP_METHOD void Dump() const { Print(llvm::errs()); }
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int line_num;
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std::string name;
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std::vector<GenericBinding> deduced_parameters;
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const TuplePattern* param_pattern;
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const Pattern* return_type;
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const Statement* body;
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};
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} // namespace Carbon
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#endif // EXECUTABLE_SEMANTICS_AST_FUNCTION_DEFINITION_H_
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