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Posted to dev@brpc.apache.org by GitBox <gi...@apache.org> on 2021/02/02 13:18:28 UTC
[GitHub] [incubator-brpc] muween opened a new issue #1340: flat_map支持struct作key吗?
muween opened a new issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340
同样的struct，使用std::map通过，而使用butil::FlatMap出现场错误，大致为
`struct xxx is used but never defined [-fpermissive]`
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[GitHub] [incubator-brpc] serverglen edited a comment on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
serverglen edited a comment on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-772182688
`struct xxx {
};`
需要实现：
1. 重载==运算符
`
bool operator==(const struct xxx& obj) const {
// TODO
}
`
2. 实现自定义的hash函数
`
template <>
struct butil::DefaultHasher <struct xxx> {
std::size_t operator() (const struct xxx& obj) {
// TODO
}
};
`
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[GitHub] [incubator-brpc] serverglen commented on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
serverglen commented on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-772182688
struct xxx {
};
需要实现：
1. 重载==运算符
bool operator==(const struct xxx& obj) const {
// TODO
}
2. 实现自定义的hash函数
template <>
struct butil::DefaultHasher<struct xxx> {
// TODO
};
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[GitHub] [incubator-brpc] serverglen commented on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
serverglen commented on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-772176824
应该是支持的，需要自己实现一个hash函数
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[GitHub] [incubator-brpc] serverglen edited a comment on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
serverglen edited a comment on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-772182688
struct xxx {
};
需要实现：
1. 重载==运算符
`
bool operator==(const struct xxx& obj) const {
// TODO
}
`
2. 实现自定义的hash函数
`
template <>
struct butil::DefaultHasher <struct xxx> {
std::size_t operator() (const struct xxx& obj) {
// TODO
}
};
`
----------------------------------------------------------------
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[GitHub] [incubator-brpc] serverglen edited a comment on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
serverglen edited a comment on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-772182688
struct xxx {
};
需要实现：
1. 重载==运算符
bool operator==(const struct xxx& obj) const {
// TODO
}
2. 实现自定义的hash函数
template <>
struct butil::DefaultHasher<struct xxx> {
std::size_t operator() (const struct xxx& obj) {
// TODO
}
};
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[GitHub] [incubator-brpc] serverglen edited a comment on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
serverglen edited a comment on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-772182688
struct xxx {
};
需要实现：
1. 重载==运算符
bool operator==(const struct xxx& obj) const {
// TODO
}
2. 实现自定义的hash函数
template <>
struct butil::DefaultHasher
<struct xxx> {
std::size_t operator() (const struct xxx& obj) {
// TODO
}
};
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[GitHub] [incubator-brpc] serverglen edited a comment on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
serverglen edited a comment on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-772182688
struct xxx {
};
需要实现：
1. 重载==运算符
bool operator==(const struct xxx& obj) const {
// TODO
}
2. 实现自定义的hash函数
template <>
struct butil::DefaultHasher <struct xxx> {
std::size_t operator() (const struct xxx& obj) {
// TODO
}
};
template <>
struct butil::DefaultHasher <struct xxx> {
std::size_t operator() (const struct xxx& obj) {
// TODO
}
};
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[GitHub] [incubator-brpc] serverglen removed a comment on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
serverglen removed a comment on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-772176824
应该是支持的，需要自己实现一个hash函数
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[GitHub] [incubator-brpc] serverglen edited a comment on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
serverglen edited a comment on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-772182688
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[GitHub] [incubator-brpc] serverglen edited a comment on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
serverglen edited a comment on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-772182688
struct xxx {
};
需要实现：
1. 重载==运算符
bool operator==(const struct xxx& obj) const {
// TODO
}
2. 实现自定义的hash函数
template <>
struct butil::DefaultHasher <struct xxx> {
std::size_t operator() (const struct xxx& obj) {
// TODO
}
};
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[GitHub] [incubator-brpc] lorinlee commented on issue #1340: flat_map支持struct作key吗?
Posted by GitBox <gi...@apache.org>.
lorinlee commented on issue #1340:
URL: https://github.com/apache/incubator-brpc/issues/1340#issuecomment-782064848
@muween 可以贴个代码片段吗，以及编译器报的错误
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