英文:
rust wasm convert enum type to string without std or fmt
问题
Is there a stable way to convert rust enum types to strings (and from strings to enum types) without the use of std or fmt?
The reason I am asking is because std appears to account for and 'bloat' the final binary size by around 33% (using cargo bloat) - leaving me with an executable almost 1MB in size for some very simple code.
Note I've already done all cargo.toml profile.release optimizations as outlined here: https://rustwasm.github.io/docs/book/reference/code-size.html
英文:
Is there a stable way to convert rust enum types to strings (and from strings to enum types) without the use of std or fmt?
The reason I am asking is because std appears to account for and 'bloat' the final binary size by around 33% (using cargo bloat) - leaving me with an executable almost 1MB in size for some very simple code.
Note I've already done all cargo.toml profile.release optimizations as outlined here: https://rustwasm.github.io/docs/book/reference/code-size.html
答案1
得分: 0
Sure, here's the translated code portion:
也许这有点傻，但我刚刚去掉了std/fmt，并在枚举上使用了impl，然后做了相同的事情。二进制大小尚未减小，但我尚未从所有依赖项中删除所有std / fmt。让我感到傻，因为我一开始就使用std / fmt，因为无论哪种方式，都需要相同的工作量。我认为唯一的区别是，如果我的MYType枚举在&format!宏内部使用，我只需要调用.to_string()
pub enum MyType {A, B, /*等等...*/ }
impl MyEnumType
{
pub fn print(&self)
{
match self
{
MyEnumType::A => web_sys::console::log_1("a"),
MyEnumType::B => web_sys::console::log_1("b"),
/*等等...*/
}
}
pub fn from_str(input: &String) -> Result<MyEnumType, String>
{
match input.as_str()
{
"A" => Ok(MyEnumType::A),
"a" => Ok(MyEnumType::A),
"B" => Ok(MyEnumType::B),
"b" => Ok(MyEnumType::B),
/*等等*/
_ => Err("bad string".to_string()),
}
}
pub fn to_string(&self) -> String
{
match self
{
MyEnumType::A => "a".to_string(),
MyEnumType::B => "b".to_string(),
/*等等...*/
}
}
}
Please note that I've removed the HTML entities and made the necessary adjustments to the code for clarity.
英文:
Maybe this is silly but I've just took out std/fmt and used impl on the enum and did the same thing. binary size hasn't decreased yet but I haven't removed all std / fmt from all dependencies yet. Makes me feel silly for using std / fmt in the first place since it's the same amount of work either way. I think the only difference is if my MYType enum were used inside the &format! macro I'd just need to call .to_string()
pub enum MyType {A, B, /*etc...*/ }
impl MyEnumType
{
pub fn print(&self)
{
match &self
{
MyEnumType::A => web_sys::console::log_1("a"),
MyEnumType::B => web_sys::console::log_1("b"),
/*etc... */
}
}
pub fn from_str(input: &String) -> Result<MyEnumType, String>
{
match input.as_str()
{
"A" => Ok(MyEnumType::A),
"a" => Ok(MyEnumType::A),
"B" => Ok(MyEnumType::B),
"b" => Ok(MyEnumType::B),
/* etc*/
_ => Err("bad string".to_string()),
}
}
pub fn to_string(&self) -> String
{
match &self
{
MyEnumType::A => "a".to_string(),
MyEnumType::B => "b".to_string(),
/* etc ... */
}
}
}
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