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

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* 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
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18
tests/monster_test/my_game/example/any_generated.rs
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@@ -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::*;
#[deprecated(since = "2.0.0", note = "Use associated constants instead. This will no longer be generated in 2021.")]
@@ -46,8 +50,8 @@ impl Any {
}
}
}
impl std::fmt::Debug for Any {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
impl core::fmt::Debug for Any {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
if let Some(name) = self.variant_name() {
f.write_str(name)
} else {
@@ -135,7 +139,7 @@ impl AnyT {
/// If the union variant matches, return the owned MonsterT, setting the union to NONE.
pub fn take_monster(&mut self) -> Option<Box<MonsterT>> {
if let Self::Monster(_) = self {
let v = std::mem::replace(self, Self::NONE);
let v = core::mem::replace(self, Self::NONE);
if let Self::Monster(w) = v {
Some(w)
} else {
@@ -156,7 +160,7 @@ impl AnyT {
/// If the union variant matches, return the owned TestSimpleTableWithEnumT, setting the union to NONE.
pub fn take_test_simple_table_with_enum(&mut self) -> Option<Box<TestSimpleTableWithEnumT>> {
if let Self::TestSimpleTableWithEnum(_) = self {
let v = std::mem::replace(self, Self::NONE);
let v = core::mem::replace(self, Self::NONE);
if let Self::TestSimpleTableWithEnum(w) = v {
Some(w)
} else {
@@ -177,7 +181,7 @@ impl AnyT {
/// If the union variant matches, return the owned super::example_2::MonsterT, setting the union to NONE.
pub fn take_my_game_example_2_monster(&mut self) -> Option<Box<super::example_2::MonsterT>> {
if let Self::MyGameExample2Monster(_) = self {
let v = std::mem::replace(self, Self::NONE);
let v = core::mem::replace(self, Self::NONE);
if let Self::MyGameExample2Monster(w) = v {
Some(w)
} else {