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Pass calling span through to builtin macro expansions

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This commit is contained in:
Lukas Wirth 2023-12-01 13:56:25 +01:00
parent f48fa0c6cb
commit 0003e568ca
27 changed files with 623 additions and 497 deletions
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30
crates/hir-expand/src/builtin_attr_macro.rs
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@ -1,18 +1,22 @@
//! Builtin attributes.
use ::tt::Span;
use base_db::{
span::{SyntaxContextId, ROOT_ERASED_FILE_AST_ID},
FileId,
};
use syntax::{TextRange, TextSize};
use crate::{db::ExpandDatabase, name, tt, ExpandResult, MacroCallId, MacroCallKind};
macro_rules! register_builtin {
( $(($name:ident, $variant:ident) => $expand:ident),* ) => {
($expand_fn:ident: $(($name:ident, $variant:ident) => $expand:ident),* ) => {
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum BuiltinAttrExpander {
$($variant),*
}
impl BuiltinAttrExpander {
pub fn expand(
pub fn $expand_fn(
&self,
db: &dyn ExpandDatabase,
id: MacroCallId,
@ -47,7 +51,7 @@ impl BuiltinAttrExpander {
}
}
register_builtin! {
register_builtin! { expand:
(bench, Bench) => dummy_attr_expand,
(cfg_accessible, CfgAccessible) => dummy_attr_expand,
(cfg_eval, CfgEval) => dummy_attr_expand,
@ -99,21 +103,31 @@ fn derive_attr_expand(
) -> ExpandResult<tt::Subtree> {
let loc = db.lookup_intern_macro_call(id);
let derives = match &loc.kind {
MacroCallKind::Attr { attr_args, .. } if loc.def.is_attribute_derive() => attr_args,
_ => return ExpandResult::ok(tt::Subtree::empty()),
MacroCallKind::Attr { attr_args: Some(attr_args), .. } if loc.def.is_attribute_derive() => {
attr_args
}
_ => return ExpandResult::ok(tt::Subtree::empty(tt::DelimSpan::DUMMY)),
};
pseudo_derive_attr_expansion(tt, derives)
pseudo_derive_attr_expansion(tt, derives, loc.call_site)
}
pub fn pseudo_derive_attr_expansion(
tt: &tt::Subtree,
args: &tt::Subtree,
call_site: SyntaxContextId,
) -> ExpandResult<tt::Subtree> {
let mk_leaf = |char| {
tt::TokenTree::Leaf(tt::Leaf::Punct(tt::Punct {
char,
spacing: tt::Spacing::Alone,
span: tt::SpanData::DUMMY,
span: tt::SpanData {
range: TextRange::empty(TextSize::new(0)),
anchor: base_db::span::SpanAnchor {
file_id: FileId::BOGUS,
ast_id: ROOT_ERASED_FILE_AST_ID,
},
ctx: call_site,
},
}))
};