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Use serde_json for target spec json

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This commit is contained in:
bjorn3 2021-06-03 17:45:09 +02:00
parent fc2abe6952
commit fc1df4ff17
11 changed files with 167 additions and 65 deletions
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2
Cargo.lock
View file

@ -3774,6 +3774,7 @@ dependencies = [
"rustc_span",
"rustc_target",
"rustc_typeck",
"serde_json",
"tracing",
"winapi",
]
@ -4445,6 +4446,7 @@ dependencies = [
"rustc_macros",
"rustc_serialize",
"rustc_span",
"serde_json",
"tracing",
]

1
compiler/rustc_driver/Cargo.toml
View file

@ -9,6 +9,7 @@ crate-type = ["dylib"]
[dependencies]
libc = "0.2"
tracing = { version = "0.1.28" }
serde_json = "1.0.59"
rustc_log = { path = "../rustc_log" }
rustc_middle = { path = "../rustc_middle" }
rustc_ast_pretty = { path = "../rustc_ast_pretty" }

6
compiler/rustc_driver/src/lib.rs
View file

@ -30,7 +30,6 @@
use rustc_metadata::locator;
use rustc_save_analysis as save;
use rustc_save_analysis::DumpHandler;
use rustc_serialize::json::ToJson;
use rustc_session::config::{nightly_options, CG_OPTIONS, DB_OPTIONS};
use rustc_session::config::{ErrorOutputType, Input, OutputType, PrintRequest, TrimmedDefPaths};
use rustc_session::cstore::MetadataLoader;
@ -40,6 +39,7 @@
use rustc_session::{early_error, early_error_no_abort, early_warn};
use rustc_span::source_map::{FileLoader, FileName};
use rustc_span::symbol::sym;
use rustc_target::json::ToJson;
use std::borrow::Cow;
use std::cmp::max;
@ -665,7 +665,9 @@ fn print_crate_info(
}
Sysroot => println!("{}", sess.sysroot.display()),
TargetLibdir => println!("{}", sess.target_tlib_path.dir.display()),
TargetSpec => println!("{}", sess.target.to_json().pretty()),
TargetSpec => {
println!("{}", serde_json::to_string_pretty(&sess.target.to_json()).unwrap());
}
FileNames | CrateName => {
let input = input.unwrap_or_else(|| {
early_error(ErrorOutputType::default(), "no input file provided")

2
compiler/rustc_middle/src/mir/interpret/value.rs
View file

@ -315,7 +315,7 @@ pub fn to_bits_or_ptr_internal(
ScalarSizeMismatch { target_size: target_size.bytes(), data_size: size.bytes() }
})?),
Scalar::Ptr(ptr, sz) => {
if target_size.bytes() != sz.into() {
if target_size.bytes() != u64::from(sz) {
return Err(ScalarSizeMismatch {
target_size: target_size.bytes(),
data_size: sz.into(),

1
compiler/rustc_target/Cargo.toml
View file

@ -6,6 +6,7 @@ edition = "2021"
[dependencies]
bitflags = "1.2.1"
tracing = "0.1"
serde_json = "1.0.59"
rustc_data_structures = { path = "../rustc_data_structures" }
rustc_macros = { path = "../rustc_macros" }
rustc_serialize = { path = "../rustc_serialize" }

5
compiler/rustc_target/src/abi/mod.rs
View file

@ -1,6 +1,7 @@
pub use Integer::*;
pub use Primitive::*;
use crate::json::{Json, ToJson};
use crate::spec::Target;
use std::convert::{TryFrom, TryInto};
@ -13,7 +14,6 @@
use rustc_data_structures::intern::Interned;
use rustc_index::vec::{Idx, IndexVec};
use rustc_macros::HashStable_Generic;
use rustc_serialize::json::{Json, ToJson};
pub mod call;
@ -166,7 +166,8 @@ pub fn parse(target: &Target) -> Result<TargetDataLayout, String> {
));
}
if dl.pointer_size.bits() != target.pointer_width.into() {
let target_pointer_width: u64 = target.pointer_width.into();
if dl.pointer_size.bits() != target_pointer_width {
return Err(format!(
"inconsistent target specification: \"data-layout\" claims \
pointers are {}-bit, while \"target-pointer-width\" is `{}`",

91
compiler/rustc_target/src/json.rs Normal file
View file

@ -0,0 +1,91 @@
use std::borrow::Cow;
use std::collections::BTreeMap;
pub use serde_json::Value as Json;
use serde_json::{Map, Number};
pub trait ToJson {
fn to_json(&self) -> Json;
}
impl ToJson for Json {
fn to_json(&self) -> Json {
self.clone()
}
}
macro_rules! to_json_impl_num {
($($t:ty), +) => (
$(impl ToJson for $t {
fn to_json(&self) -> Json {
Json::Number(Number::from(*self))
}
})+
)
}
to_json_impl_num! { isize, i8, i16, i32, i64, usize, u8, u16, u32, u64 }
impl ToJson for bool {
fn to_json(&self) -> Json {
Json::Bool(*self)
}
}
impl ToJson for str {
fn to_json(&self) -> Json {
Json::String(self.to_owned())
}
}
impl ToJson for String {
fn to_json(&self) -> Json {
Json::String(self.to_owned())
}
}
impl<'a> ToJson for Cow<'a, str> {
fn to_json(&self) -> Json {
Json::String(self.to_string())
}
}
impl<A: ToJson> ToJson for [A] {
fn to_json(&self) -> Json {
Json::Array(self.iter().map(|elt| elt.to_json()).collect())
}
}
impl<A: ToJson> ToJson for Vec<A> {
fn to_json(&self) -> Json {
Json::Array(self.iter().map(|elt| elt.to_json()).collect())
}
}
impl<'a, A: ToJson> ToJson for Cow<'a, [A]>
where
[A]: ToOwned,
{
fn to_json(&self) -> Json {
Json::Array(self.iter().map(|elt| elt.to_json()).collect())
}
}
impl<T: ToString, A: ToJson> ToJson for BTreeMap<T, A> {
fn to_json(&self) -> Json {
let mut d = Map::new();
for (key, value) in self {
d.insert(key.to_string(), value.to_json());
}
Json::Object(d)
}
}
impl<A: ToJson> ToJson for Option<A> {
fn to_json(&self) -> Json {
match *self {
None => Json::Null,
Some(ref value) => value.to_json(),
}
}
}

1
compiler/rustc_target/src/lib.rs
View file

@ -28,6 +28,7 @@
pub mod abi;
pub mod asm;
pub mod json;
pub mod spec;
#[cfg(test)]

2
compiler/rustc_target/src/spec/crt_objects.rs
View file

@ -40,8 +40,8 @@
//! but not gcc's. As a result rustc cannot link with C++ static libraries (#36710)
//! when linking in self-contained mode.
use crate::json::{Json, ToJson};
use crate::spec::LinkOutputKind;
use rustc_serialize::json::{Json, ToJson};
use std::borrow::Cow;
use std::collections::BTreeMap;
use std::str::FromStr;

113
compiler/rustc_target/src/spec/mod.rs
View file

@ -35,11 +35,12 @@
//! to the list specified by the target, rather than replace.
use crate::abi::Endian;
use crate::json::{Json, ToJson};
use crate::spec::abi::{lookup as lookup_abi, Abi};
use crate::spec::crt_objects::{CrtObjects, CrtObjectsFallback};
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_serialize::json::{Json, ToJson};
use rustc_span::symbol::{sym, Symbol};
use serde_json::Value;
use std::borrow::Cow;
use std::collections::BTreeMap;
use std::convert::TryFrom;
@ -548,7 +549,7 @@ fn from_json(json: &Json) -> Result<Self, String> {
let object = json.as_object().ok_or_else(|| "expected a JSON object")?;
let kind = object
.get("kind")
.and_then(|o| o.as_string())
.and_then(|o| o.as_str())
.ok_or_else(|| "expected `kind` to be a string")?;
match kind {
"none" => Ok(StackProbeType::None),
@ -592,11 +593,11 @@ fn to_json(&self) -> Json {
StackProbeType::Call => {
[(String::from("kind"), "call".to_json())].into_iter().collect()
}
StackProbeType::InlineOrCall { min_llvm_version_for_inline } => [
StackProbeType::InlineOrCall { min_llvm_version_for_inline: (maj, min, patch) } => [
(String::from("kind"), "inline-or-call".to_json()),
(
String::from("min-llvm-version-for-inline"),
min_llvm_version_for_inline.to_json(),
Json::Array(vec![maj.to_json(), min.to_json(), patch.to_json()]),
),
]
.into_iter()
@ -1682,7 +1683,7 @@ pub fn max_atomic_width(&self) -> u64 {
}
/// Loads a target descriptor from a JSON object.
pub fn from_json(mut obj: Json) -> Result<(Target, TargetWarnings), String> {
pub fn from_json(obj: Json) -> Result<(Target, TargetWarnings), String> {
// While ugly, this code must remain this way to retain
// compatibility with existing JSON fields and the internal
// expected naming of the Target and TargetOptions structs.
@ -1690,9 +1691,14 @@ pub fn from_json(mut obj: Json) -> Result<(Target, TargetWarnings), String> {
// are round-tripped through this code to catch cases where
// the JSON parser is not updated to match the structs.
let mut obj = match obj {
Value::Object(obj) => obj,
_ => return Err("Expected JSON object for target")?,
};
let mut get_req_field = |name: &str| {
obj.remove_key(name)
.and_then(|j| Json::as_string(&j).map(str::to_string))
obj.remove(name)
.and_then(|j| j.as_str().map(str::to_string))
.ok_or_else(|| format!("Field {} in target specification is required", name))
};
@ -1711,31 +1717,31 @@ pub fn from_json(mut obj: Json) -> Result<(Target, TargetWarnings), String> {
macro_rules! key {
($key_name:ident) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(s) = obj.remove_key(&name).and_then(|j| Json::as_string(&j).map(str::to_string).map(Cow::from)) {
if let Some(s) = obj.remove(&name).and_then(|s| s.as_str().map(str::to_string).map(Cow::from)) {
base.$key_name = s;
}
} );
($key_name:ident = $json_name:expr) => ( {
let name = $json_name;
if let Some(s) = obj.remove_key(&name).and_then(|j| Json::as_string(&j).map(str::to_string).map(Cow::from)) {
if let Some(s) = obj.remove(name).and_then(|s| s.as_str().map(str::to_string).map(Cow::from)) {
base.$key_name = s;
}
} );
($key_name:ident, bool) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(s) = obj.remove_key(&name).and_then(|j| Json::as_boolean(&j)) {
if let Some(s) = obj.remove(&name).and_then(|b| b.as_bool()) {
base.$key_name = s;
}
} );
($key_name:ident, u64) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(s) = obj.remove_key(&name).and_then(|j| Json::as_u64(&j)) {
if let Some(s) = obj.remove(&name).and_then(|j| Json::as_u64(&j)) {
base.$key_name = s;
}
} );
($key_name:ident, Option<u32>) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(s) = obj.remove_key(&name).and_then(|j| Json::as_u64(&j)) {
if let Some(s) = obj.remove(&name).and_then(|b| b.as_u64()) {
if s < 1 || s > 5 {
return Err("Not a valid DWARF version number".into());
}
@ -1744,13 +1750,13 @@ macro_rules! key {
} );
($key_name:ident, Option<u64>) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(s) = obj.remove_key(&name).and_then(|j| Json::as_u64(&j)) {
if let Some(s) = obj.remove(&name).and_then(|b| b.as_u64()) {
base.$key_name = Some(s);
}
} );
($key_name:ident, MergeFunctions) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
match s.parse::<MergeFunctions>() {
Ok(mergefunc) => base.$key_name = mergefunc,
_ => return Some(Err(format!("'{}' is not a valid value for \
@ -1763,7 +1769,7 @@ macro_rules! key {
} );
($key_name:ident, RelocModel) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
match s.parse::<RelocModel>() {
Ok(relocation_model) => base.$key_name = relocation_model,
_ => return Some(Err(format!("'{}' is not a valid relocation model. \
@ -1775,7 +1781,7 @@ macro_rules! key {
} );
($key_name:ident, CodeModel) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
match s.parse::<CodeModel>() {
Ok(code_model) => base.$key_name = Some(code_model),
_ => return Some(Err(format!("'{}' is not a valid code model. \
@ -1787,7 +1793,7 @@ macro_rules! key {
} );
($key_name:ident, TlsModel) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
match s.parse::<TlsModel>() {
Ok(tls_model) => base.$key_name = tls_model,
_ => return Some(Err(format!("'{}' is not a valid TLS model. \
@ -1799,7 +1805,7 @@ macro_rules! key {
} );
($key_name:ident, PanicStrategy) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
match s {
"unwind" => base.$key_name = PanicStrategy::Unwind,
"abort" => base.$key_name = PanicStrategy::Abort,
@ -1812,7 +1818,7 @@ macro_rules! key {
} );
($key_name:ident, RelroLevel) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
match s.parse::<RelroLevel>() {
Ok(level) => base.$key_name = level,
_ => return Some(Err(format!("'{}' is not a valid value for \
@ -1824,7 +1830,7 @@ macro_rules! key {
} );
($key_name:ident, SplitDebuginfo) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
match s.parse::<SplitDebuginfo>() {
Ok(level) => base.$key_name = level,
_ => return Some(Err(format!("'{}' is not a valid value for \
@ -1836,10 +1842,10 @@ macro_rules! key {
} );
($key_name:ident, list) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(j) = obj.remove_key(&name){
if let Some(v) = Json::as_array(&j) {
if let Some(j) = obj.remove(&name) {
if let Some(v) = j.as_array() {
base.$key_name = v.iter()
.map(|a| a.as_string().unwrap().to_string().into())
.map(|a| a.as_str().unwrap().to_string().into())
.collect();
} else {
incorrect_type.push(name)
@ -1848,10 +1854,10 @@ macro_rules! key {
} );
($key_name:ident, opt_list) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(j) = obj.remove_key(&name) {
if let Some(v) = Json::as_array(&j) {
if let Some(j) = obj.remove(&name) {
if let Some(v) = j.as_array() {
base.$key_name = Some(v.iter()
.map(|a| a.as_string().unwrap().to_string().into())
.map(|a| a.as_str().unwrap().to_string().into())
.collect());
} else {
incorrect_type.push(name)
@ -1860,15 +1866,15 @@ macro_rules! key {
} );
($key_name:ident, optional) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(o) = obj.remove_key(&name[..]) {
if let Some(o) = obj.remove(&name) {
base.$key_name = o
.as_string()
.as_str()
.map(|s| s.to_string().into());
}
} );
($key_name:ident, LldFlavor) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
if let Some(flavor) = LldFlavor::from_str(&s) {
base.$key_name = flavor;
} else {
@ -1882,7 +1888,7 @@ macro_rules! key {
} );
($key_name:ident, LinkerFlavor) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
match LinkerFlavor::from_str(s) {
Some(linker_flavor) => base.$key_name = linker_flavor,
_ => return Some(Err(format!("'{}' is not a valid value for linker-flavor. \
@ -1893,7 +1899,7 @@ macro_rules! key {
} );
($key_name:ident, StackProbeType) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| match StackProbeType::from_json(&o) {
obj.remove(&name).and_then(|o| match StackProbeType::from_json(&o) {
Ok(v) => {
base.$key_name = v;
Some(Ok(()))
@ -1905,10 +1911,10 @@ macro_rules! key {
} );
($key_name:ident, SanitizerSet) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(o) = obj.remove_key(&name[..]) {
if let Some(o) = obj.remove(&name) {
if let Some(a) = o.as_array() {
for s in a {
base.$key_name |= match s.as_string() {
base.$key_name |= match s.as_str() {
Some("address") => SanitizerSet::ADDRESS,
Some("cfi") => SanitizerSet::CFI,
Some("leak") => SanitizerSet::LEAK,
@ -1929,7 +1935,7 @@ macro_rules! key {
($key_name:ident, crt_objects_fallback) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
match s.parse::<CrtObjectsFallback>() {
Ok(fallback) => base.$key_name = Some(fallback),
_ => return Some(Err(format!("'{}' is not a valid CRT objects fallback. \
@ -1940,7 +1946,7 @@ macro_rules! key {
} );
($key_name:ident, link_objects) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(val) = obj.remove_key(&name[..]) {
if let Some(val) = obj.remove(&name) {
let obj = val.as_object().ok_or_else(|| format!("{}: expected a \
JSON object with fields per CRT object kind.", name))?;
let mut args = CrtObjects::new();
@ -1955,7 +1961,7 @@ macro_rules! key {
format!("{}.{}: expected a JSON array", name, k)
)?.iter().enumerate()
.map(|(i,s)| {
let s = s.as_string().ok_or_else(||
let s = s.as_str().ok_or_else(||
format!("{}.{}[{}]: expected a JSON string", name, k, i))?;
Ok(s.to_string().into())
})
@ -1968,7 +1974,7 @@ macro_rules! key {
} );
($key_name:ident, link_args) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(val) = obj.remove_key(&name[..]) {
if let Some(val) = obj.remove(&name) {
let obj = val.as_object().ok_or_else(|| format!("{}: expected a \
JSON object with fields per linker-flavor.", name))?;
let mut args = LinkArgs::new();
@ -1982,7 +1988,7 @@ macro_rules! key {
format!("{}.{}: expected a JSON array", name, k)
)?.iter().enumerate()
.map(|(i,s)| {
let s = s.as_string().ok_or_else(||
let s = s.as_str().ok_or_else(||
format!("{}.{}[{}]: expected a JSON string", name, k, i))?;
Ok(s.to_string().into())
})
@ -1995,10 +2001,10 @@ macro_rules! key {
} );
($key_name:ident, env) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(o) = obj.remove_key(&name[..]) {
if let Some(o) = obj.remove(&name) {
if let Some(a) = o.as_array() {
for o in a {
if let Some(s) = o.as_string() {
if let Some(s) = o.as_str() {
let p = s.split('=').collect::<Vec<_>>();
if p.len() == 2 {
let k = p[0].to_string();
@ -2014,7 +2020,7 @@ macro_rules! key {
} );
($key_name:ident, Option<Abi>) => ( {
let name = (stringify!($key_name)).replace("_", "-");
obj.remove_key(&name[..]).and_then(|o| o.as_string().and_then(|s| {
obj.remove(&name).and_then(|o| o.as_str().and_then(|s| {
match lookup_abi(s) {
Some(abi) => base.$key_name = Some(abi),
_ => return Some(Err(format!("'{}' is not a valid value for abi", s))),
@ -2023,28 +2029,28 @@ macro_rules! key {
})).unwrap_or(Ok(()))
} );
($key_name:ident, TargetFamilies) => ( {
if let Some(value) = obj.remove_key("target-family") {
if let Some(v) = Json::as_array(&value) {
if let Some(value) = obj.remove("target-family") {
if let Some(v) = value.as_array() {
base.$key_name = v.iter()
.map(|a| a.as_string().unwrap().to_string().into())
.map(|a| a.as_str().unwrap().to_string().into())
.collect();
} else if let Some(v) = Json::as_string(&value) {
} else if let Some(v) = value.as_str() {
base.$key_name = vec![v.to_string().into()].into();
}
}
} );
}
if let Some(j) = obj.remove_key("target-endian") {
if let Some(s) = Json::as_string(&j) {
if let Some(j) = obj.remove("target-endian") {
if let Some(s) = j.as_str() {
base.endian = s.parse()?;
} else {
incorrect_type.push("target-endian".into())
}
}
if let Some(fp) = obj.remove_key("frame-pointer") {
if let Some(s) = Json::as_string(&fp) {
if let Some(fp) = obj.remove("frame-pointer") {
if let Some(s) = fp.as_str() {
base.frame_pointer = s
.parse()
.map_err(|()| format!("'{}' is not a valid value for frame-pointer", s))?;
@ -2156,8 +2162,8 @@ macro_rules! key {
// This can cause unfortunate ICEs later down the line.
return Err("may not set is_builtin for targets not built-in".into());
}
// Each field should have been read using `Json::remove_key` so any keys remaining are unused.
let remaining_keys = obj.as_object().ok_or("Expected JSON object for target")?.keys();
// Each field should have been read using `Json::remove` so any keys remaining are unused.
let remaining_keys = obj.keys();
Ok((
base,
TargetWarnings { unused_fields: remaining_keys.cloned().collect(), incorrect_type },
@ -2189,13 +2195,12 @@ pub fn search(
target_triple: &TargetTriple,
sysroot: &Path,
) -> Result<(Target, TargetWarnings), String> {
use rustc_serialize::json;
use std::env;
use std::fs;
fn load_file(path: &Path) -> Result<(Target, TargetWarnings), String> {
let contents = fs::read_to_string(path).map_err(|e| e.to_string())?;
let obj = json::from_str(&contents).map_err(|e| e.to_string())?;
let obj = serde_json::from_str(&contents).map_err(|e| e.to_string())?;
Target::from_json(obj)
}
@ -2248,7 +2253,7 @@ fn load_file(path: &Path) -> Result<(Target, TargetWarnings), String> {
impl ToJson for Target {
fn to_json(&self) -> Json {
let mut d = BTreeMap::new();
let mut d = serde_json::Map::new();
let default: TargetOptions = Default::default();
macro_rules! target_val {

8
compiler/rustc_target/src/tests.rs
View file

@ -1,10 +1,8 @@
use crate::spec::Target;
use rustc_serialize::json::Json;
use std::str::FromStr;
#[test]
fn report_unused_fields() {
let json = Json::from_str(
let json = serde_json::from_str(
r#"
{
"arch": "powerpc64",
@ -23,7 +21,7 @@ fn report_unused_fields() {
#[test]
fn report_incorrect_json_type() {
let json = Json::from_str(
let json = serde_json::from_str(
r#"
{
"arch": "powerpc64",
@ -42,7 +40,7 @@ fn report_incorrect_json_type() {
#[test]
fn no_warnings_for_valid_target() {
let json = Json::from_str(
let json = serde_json::from_str(
r#"
{
"arch": "powerpc64",