Make flatc generate Rust files not requiring std (#7273)

* Set an explicit 2018 edition for Rust tests

* Replace all `std` usage with `core` and `alloc` in Rust code generator

* Update the generated files

* Make Rust tests actually use no_std when the corresponding feature is enabled
This commit is contained in:
Bogdan Opanchuk
2022-04-26 18:40:03 -07:00
committed by GitHub
parent 9917a168cd
commit 750dde7669
88 changed files with 799 additions and 430 deletions

View File

@@ -1,7 +1,11 @@
// automatically generated by the FlatBuffers compiler, do not modify
extern crate alloc;
extern crate flatbuffers;
use std::mem;
use std::cmp::Ordering;
use alloc::boxed::Box;
use alloc::string::{String, ToString};
use alloc::vec::Vec;
use core::mem;
use core::cmp::Ordering;
use self::flatbuffers::{EndianScalar, Follow};
use super::*;
// struct NestedStruct, aligned to 8
@@ -13,8 +17,8 @@ impl Default for NestedStruct {
Self([0; 32])
}
}
impl std::fmt::Debug for NestedStruct {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
impl core::fmt::Debug for NestedStruct {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
f.debug_struct("NestedStruct")
.field("a", &self.a())
.field("b", &self.b())
@@ -45,7 +49,7 @@ impl<'b> flatbuffers::Push for NestedStruct {
#[inline]
fn push(&self, dst: &mut [u8], _rest: &[u8]) {
let src = unsafe {
::std::slice::from_raw_parts(self as *const NestedStruct as *const u8, Self::size())
::core::slice::from_raw_parts(self as *const NestedStruct as *const u8, Self::size())
};
dst.copy_from_slice(src);
}
@@ -56,7 +60,7 @@ impl<'b> flatbuffers::Push for &'b NestedStruct {
#[inline]
fn push(&self, dst: &mut [u8], _rest: &[u8]) {
let src = unsafe {
::std::slice::from_raw_parts(*self as *const NestedStruct as *const u8, Self::size())
::core::slice::from_raw_parts(*self as *const NestedStruct as *const u8, Self::size())
};
dst.copy_from_slice(src);
}
@@ -129,7 +133,7 @@ impl<'a> NestedStruct {
pub fn set_c(&mut self, x: &[TestEnum; 2]) {
unsafe {
std::ptr::copy(
core::ptr::copy(
x.as_ptr() as *const u8,
self.0.as_mut_ptr().add(9),
2,