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Use Box<[Type]> inside of FunctionType` #2036

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Jan 22, 2021
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Use Box<[Type]> inside of FunctionType` #2036

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8 changes: 4 additions & 4 deletions lib/wasmer-types/src/types.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -229,9 +229,9 @@ impl ExternType {
#[cfg_attr(feature = "enable-serde", derive(Serialize, Deserialize))]
pub struct FunctionType {
/// The parameters of the function
params: Vec<Type>,
params: Box<[Type]>,
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Does this affect serde somehow?

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I don't believe it should, but that's a good thing to check -- thanks!

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Alright, checked the serde source code: they're both serialized as sequences, so there shouldn't be any effect on the serialization in any format

/// The return values of the function
results: Vec<Type>,
results: Box<[Type]>,
}

impl FunctionType {
Expand All @@ -242,8 +242,8 @@ impl FunctionType {
Returns: Into<Vec<Type>>,
{
Self {
params: params.into(),
results: returns.into(),
params: params.into().into_boxed_slice(),
results: returns.into().into_boxed_slice(),
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Rust can infer the target type of returns.into() to the temporary Vec<Type>? Impressive.

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In this case, params and returns and generic and the only thing we know about these types is that they implement Into<Vec<Type>>, but I agree that it is nice!

}
}

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