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92 lines
3.4 KiB
92 lines
3.4 KiB
7 months ago
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/*
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* Copyright 2019 The Android Open Source Project
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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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*/
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#include "enum_gen.h"
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#include <iostream>
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#include "util.h"
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EnumGen::EnumGen(EnumDef e) : e_(std::move(e)) {}
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void EnumGen::GenDefinition(std::ostream& stream) {
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stream << "enum class ";
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stream << e_.name_;
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stream << " : " << util::GetTypeForSize(e_.size_);
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stream << " {";
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for (const auto& pair : e_.constants_) {
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stream << pair.second << " = 0x" << std::hex << pair.first << std::dec << ",";
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}
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stream << "};\n";
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}
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void EnumGen::GenDefinitionPybind11(std::ostream& stream) {
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stream << "py::enum_<" << e_.name_ << ">(m, \"" << e_.name_ << "\")";
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for (const auto& pair : e_.constants_) {
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stream << ".value(\"" << pair.second << "\", " << e_.name_ << "::" << pair.second << ")";
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}
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stream << ";\n";
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}
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void EnumGen::GenLogging(std::ostream& stream) {
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// Print out the switch statement that converts all the constants to strings.
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stream << "inline std::string " << e_.name_ << "Text(const " << e_.name_ << "& param) {";
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stream << "switch (param) {";
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for (const auto& pair : e_.constants_) {
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stream << "case " << e_.name_ << "::" << pair.second << ":";
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stream << " return \"" << pair.second << "\";";
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}
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stream << "default:";
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stream << " return std::string(\"Unknown " << e_.name_ << ": \") + std::to_string(static_cast<int>(param));";
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stream << "}";
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stream << "}\n\n";
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// Print out the stream operator so that the constant can be written to streams.
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stream << "inline std::ostream& operator<<(std::ostream& os, const " << e_.name_ << "& param) {";
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stream << " return os << " << e_.name_ << "Text(param);";
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stream << "}\n";
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}
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void EnumGen::GenRustDef(std::ostream& stream) {
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stream << "#[derive(FromPrimitive, ToPrimitive, Debug, Hash, Eq, PartialEq, Clone, Copy)]\n";
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stream << "pub enum " << e_.name_ << " {";
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for (const auto& pair : e_.constants_) {
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stream << util::ConstantCaseToCamelCase(pair.second) << " = 0x" << std::hex << pair.first << std::dec << ",";
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}
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stream << "}";
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if (e_.try_from_enum_ != nullptr) {
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std::vector<std::string> other_items;
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for (const auto& pair : e_.try_from_enum_->constants_) {
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other_items.push_back(pair.second);
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}
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stream << "impl TryFrom<" << e_.try_from_enum_->name_ << "> for " << e_.name_ << " {";
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stream << "type Error = &'static str;";
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stream << "fn try_from(value: " << e_.try_from_enum_->name_ << ") -> std::result::Result<Self, Self::Error> {";
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stream << "match value {";
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for (const auto& pair : e_.constants_) {
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if (std::find(other_items.begin(), other_items.end(), pair.second) == other_items.end()) {
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continue;
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}
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auto constant_name = util::ConstantCaseToCamelCase(pair.second);
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stream << e_.try_from_enum_->name_ << "::" << constant_name << " => Ok(" << e_.name_ << "::" << constant_name
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<< "),";
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}
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stream << "_ => Err(\"No mapping for provided key\"),";
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stream << "}}}";
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}
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}
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