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sp-runtime-interface add table about FFI types (#4668)

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Adds a table to the rustdoc that shows how each individual type is
passed between the wasm and the host side.
This commit is contained in:
Bastian Köcher
2020-01-18 13:51:12 +01:00
committed by Gavin Wood
parent b72ba98b97
commit 1b9baad04f
3 changed files with 34 additions and 7 deletions
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substrate/primitives/runtime-interface/src/impls.rs
+3 -3
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@@ -150,7 +150,7 @@ impl IntoFFIValue for bool {
///
/// The `u64` value is build by `length 32bit << 32 | pointer 32bit`
///
/// If `T == u8` the length and the pointer are taken directly from the `Self`.
/// If `T == u8` the length and the pointer are taken directly from `Self`.
/// Otherwise `Self` is encoded and the length and the pointer are taken from the encoded vector.
impl<T> RIType for Vec<T> {
type FFIType = u64;
@@ -209,7 +209,7 @@ impl<T: 'static + Decode> FromFFIValue for Vec<T> {
///
/// The `u64` value is build by `length 32bit << 32 | pointer 32bit`
///
/// If `T == u8` the length and the pointer are taken directly from the `Self`.
/// If `T == u8` the length and the pointer are taken directly from `Self`.
/// Otherwise `Self` is encoded and the length and the pointer are taken from the encoded vector.
impl<T> RIType for [T] {
type FFIType = u64;
@@ -400,7 +400,7 @@ for_primitive_types! {
///
/// The `u64` value is build by `length 32bit << 32 | pointer 32bit`
///
/// The length and the pointer are taken directly from the `Self`.
/// The length and the pointer are taken directly from `Self`.
impl RIType for str {
type FFIType = u64;
}