| 1 | //===- xray-registry.h - Define registry mechanism for commands. ----------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // Implement a simple subcommand registry. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | #ifndef TOOLS_LLVM_XRAY_XRAY_REGISTRY_H |
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| 13 | #define TOOLS_LLVM_XRAY_XRAY_REGISTRY_H |
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| 14 | |
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| 15 | #include "llvm/Support/CommandLine.h" |
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| 16 | #include "llvm/Support/Error.h" |
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| 17 | |
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| 18 | namespace llvm { |
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| 19 | namespace xray { |
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| 20 | |
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| 21 | // Use |CommandRegistration| as a global initialiser that registers a function |
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| 22 | // and associates it with |SC|. This requires that a command has not been |
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| 23 | // registered to a given |SC|. |
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| 24 | // |
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| 25 | // Usage: |
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| 26 | // |
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| 27 | // // At namespace scope. |
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| 28 | // static CommandRegistration Unused(&MySubCommand, [] { ... }); |
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| 29 | // |
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| 30 | struct CommandRegistration { |
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| 31 | CommandRegistration(cl::SubCommand *SC, std::function<Error()> Command); |
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| 32 | }; |
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| 33 | |
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| 34 | // Requires that |SC| is not null and has an associated function to it. |
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| 35 | std::function<Error()> dispatch(cl::SubCommand *SC); |
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| 36 | |
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| 37 | } // namespace xray |
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| 38 | } // namespace llvm |
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| 39 | |
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| 40 | #endif // TOOLS_LLVM_XRAY_XRAY_REGISTRY_H |
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| 41 | |
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