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Lower asm expressions

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This commit is contained in:
Lukas Wirth 2024-09-01 15:17:52 +02:00
parent 86658c66b4
commit 3b11ff8c4d
14 changed files with 612 additions and 97 deletions
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34
crates/hir-expand/src/builtin/fn_macro.rs
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@ -119,9 +119,8 @@ register_builtin! {
(module_path, ModulePath) => module_path_expand,
(assert, Assert) => assert_expand,
(stringify, Stringify) => stringify_expand,
(llvm_asm, LlvmAsm) => asm_expand,
(asm, Asm) => asm_expand,
(global_asm, GlobalAsm) => global_asm_expand,
(global_asm, GlobalAsm) => asm_expand,
(cfg, Cfg) => cfg_expand,
(core_panic, CorePanic) => panic_expand,
(std_panic, StdPanic) => panic_expand,
@ -324,40 +323,15 @@ fn asm_expand(
tt: &tt::Subtree,
span: Span,
) -> ExpandResult<tt::Subtree> {
// We expand all assembly snippets to `format_args!` invocations to get format syntax
// highlighting for them.
let mut literals = Vec::new();
for tt in tt.token_trees.chunks(2) {
match tt {
[tt::TokenTree::Leaf(tt::Leaf::Literal(lit))]
| [tt::TokenTree::Leaf(tt::Leaf::Literal(lit)), tt::TokenTree::Leaf(tt::Leaf::Punct(tt::Punct { char: ',', span: _, spacing: _ }))] =>
{
let dollar_krate = dollar_crate(span);
literals.push(quote!(span=>#dollar_krate::format_args!(#lit);));
}
_ => break,
}
}
let mut tt = tt.clone();
tt.delimiter.kind = tt::DelimiterKind::Parenthesis;
let pound = mk_pound(span);
let expanded = quote! {span =>
builtin #pound asm (
{##literals}
)
builtin #pound asm #tt
};
ExpandResult::ok(expanded)
}
fn global_asm_expand(
_db: &dyn ExpandDatabase,
_id: MacroCallId,
_tt: &tt::Subtree,
span: Span,
) -> ExpandResult<tt::Subtree> {
// Expand to nothing (at item-level)
ExpandResult::ok(quote! {span =>})
}
fn cfg_expand(
db: &dyn ExpandDatabase,
id: MacroCallId,