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Improve the help message for an invalid calling convention

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This commit is contained in:
khyperia
2022-09-08 15:37:15 +02:00
parent 89e4e1f1b3
commit 9a206a78eb
17 changed files with 300 additions and 214 deletions
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188
compiler/rustc_target/src/spec/abi.rs
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@@ -1,6 +1,8 @@
use std::fmt;
use rustc_macros::HashStable_Generic;
use rustc_span::symbol::sym;
use rustc_span::{Span, Symbol};
#[cfg(test)]
mod tests;
@@ -94,6 +96,192 @@ pub fn all_names() -> Vec<&'static str> {
AbiDatas.iter().map(|d| d.name).collect()
}
pub fn enabled_names(features: &rustc_feature::Features, span: Span) -> Vec<&'static str> {
AbiDatas
.iter()
.map(|d| d.name)
.filter(|name| is_enabled(features, span, name).is_ok())
.collect()
}
pub enum AbiDisabled {
Unstable { feature: Symbol, explain: &'static str },
Unrecognized,
}
fn gate_feature_post(
features: &rustc_feature::Features,
feature: Symbol,
span: Span,
explain: &'static str,
) -> Result<(), AbiDisabled> {
if !features.enabled(feature) && !span.allows_unstable(feature) {
Err(AbiDisabled::Unstable { feature, explain })
} else {
Ok(())
}
}
pub fn is_enabled(
features: &rustc_feature::Features,
span: Span,
name: &str,
) -> Result<(), AbiDisabled> {
match name {
// Stable
"Rust" | "C" | "cdecl" | "stdcall" | "fastcall" | "aapcs" | "win64" | "sysv64"
| "system" => Ok(()),
"rust-intrinsic" => {
gate_feature_post(features, sym::intrinsics, span, "intrinsics are subject to change")
}
"platform-intrinsic" => gate_feature_post(
features,
sym::platform_intrinsics,
span,
"platform intrinsics are experimental and possibly buggy",
),
"vectorcall" => gate_feature_post(
features,
sym::abi_vectorcall,
span,
"vectorcall is experimental and subject to change",
),
"thiscall" => gate_feature_post(
features,
sym::abi_thiscall,
span,
"thiscall is experimental and subject to change",
),
"rust-call" => gate_feature_post(
features,
sym::unboxed_closures,
span,
"rust-call ABI is subject to change",
),
"rust-cold" => gate_feature_post(
features,
sym::rust_cold_cc,
span,
"rust-cold is experimental and subject to change",
),
"ptx-kernel" => gate_feature_post(
features,
sym::abi_ptx,
span,
"PTX ABIs are experimental and subject to change",
),
"unadjusted" => gate_feature_post(
features,
sym::abi_unadjusted,
span,
"unadjusted ABI is an implementation detail and perma-unstable",
),
"msp430-interrupt" => gate_feature_post(
features,
sym::abi_msp430_interrupt,
span,
"msp430-interrupt ABI is experimental and subject to change",
),
"x86-interrupt" => gate_feature_post(
features,
sym::abi_x86_interrupt,
span,
"x86-interrupt ABI is experimental and subject to change",
),
"amdgpu-kernel" => gate_feature_post(
features,
sym::abi_amdgpu_kernel,
span,
"amdgpu-kernel ABI is experimental and subject to change",
),
"avr-interrupt" | "avr-non-blocking-interrupt" => gate_feature_post(
features,
sym::abi_avr_interrupt,
span,
"avr-interrupt and avr-non-blocking-interrupt ABIs are experimental and subject to change",
),
"efiapi" => gate_feature_post(
features,
sym::abi_efiapi,
span,
"efiapi ABI is experimental and subject to change",
),
"C-cmse-nonsecure-call" => gate_feature_post(
features,
sym::abi_c_cmse_nonsecure_call,
span,
"C-cmse-nonsecure-call ABI is experimental and subject to change",
),
"C-unwind" => gate_feature_post(
features,
sym::c_unwind,
span,
"C-unwind ABI is experimental and subject to change",
),
"stdcall-unwind" => gate_feature_post(
features,
sym::c_unwind,
span,
"stdcall-unwind ABI is experimental and subject to change",
),
"system-unwind" => gate_feature_post(
features,
sym::c_unwind,
span,
"system-unwind ABI is experimental and subject to change",
),
"thiscall-unwind" => gate_feature_post(
features,
sym::c_unwind,
span,
"thiscall-unwind ABI is experimental and subject to change",
),
"cdecl-unwind" => gate_feature_post(
features,
sym::c_unwind,
span,
"cdecl-unwind ABI is experimental and subject to change",
),
"fastcall-unwind" => gate_feature_post(
features,
sym::c_unwind,
span,
"fastcall-unwind ABI is experimental and subject to change",
),
"vectorcall-unwind" => gate_feature_post(
features,
sym::c_unwind,
span,
"vectorcall-unwind ABI is experimental and subject to change",
),
"aapcs-unwind" => gate_feature_post(
features,
sym::c_unwind,
span,
"aapcs-unwind ABI is experimental and subject to change",
),
"win64-unwind" => gate_feature_post(
features,
sym::c_unwind,
span,
"win64-unwind ABI is experimental and subject to change",
),
"sysv64-unwind" => gate_feature_post(
features,
sym::c_unwind,
span,
"sysv64-unwind ABI is experimental and subject to change",
),
"wasm" => gate_feature_post(
features,
sym::wasm_abi,
span,
"wasm ABI is experimental and subject to change",
),
_ => Err(AbiDisabled::Unrecognized),
}
}
impl Abi {
/// Default ABI chosen for `extern fn` declarations without an explicit ABI.
pub const FALLBACK: Abi = Abi::C { unwind: false };