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Add basic bultin macro infrastructure

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This commit is contained in:
Edwin Cheng 2019-11-10 11:03:24 +08:00
parent defc7ad772
commit c46768d13d
8 changed files with 148 additions and 29 deletions
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29
crates/ra_hir_expand/src/lib.rs
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@ -10,6 +10,7 @@ pub mod either;
pub mod name;
pub mod hygiene;
pub mod diagnostics;
pub mod builtin_macro;
use std::hash::{Hash, Hasher};
use std::sync::Arc;
@ -21,6 +22,7 @@ use ra_syntax::{
};
use crate::ast_id_map::FileAstId;
use crate::builtin_macro::BuiltinExpander;
/// Input to the analyzer is a set of files, where each file is identified by
/// `FileId` and contains source code. However, another source of source code in
@ -75,9 +77,15 @@ impl HirFileId {
HirFileIdRepr::MacroFile(macro_file) => {
let loc: MacroCallLoc = db.lookup_intern_macro(macro_file.macro_call_id);
// FIXME: Do we support expansion information in builtin macro?
let macro_decl = match loc.def {
MacroDefId::DeclarativeMacro(it) => (it),
MacroDefId::BuiltinMacro(_) => return None,
};
let arg_start = loc.ast_id.to_node(db).token_tree()?.syntax().text_range().start();
let def_start =
loc.def.ast_id.to_node(db).token_tree()?.syntax().text_range().start();
macro_decl.ast_id.to_node(db).token_tree()?.syntax().text_range().start();
let macro_def = db.macro_def(loc.def)?;
let shift = macro_def.0.shift();
@ -85,7 +93,7 @@ impl HirFileId {
let macro_arg = db.macro_arg(macro_file.macro_call_id)?;
let arg_start = (loc.ast_id.file_id, arg_start);
let def_start = (loc.def.ast_id.file_id, def_start);
let def_start = (macro_decl.ast_id.file_id, def_start);
Some(ExpansionInfo { arg_start, def_start, macro_arg, macro_def, exp_map, shift })
}
@ -119,11 +127,24 @@ impl salsa::InternKey for MacroCallId {
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct MacroDefId {
pub enum MacroDefId {
DeclarativeMacro(DeclarativeMacro),
BuiltinMacro(BuiltinMacro),
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct DeclarativeMacro {
pub krate: CrateId,
pub ast_id: AstId<ast::MacroCall>,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct BuiltinMacro {
pub krate: CrateId,
pub ast_id: AstId<ast::MacroCall>,
pub expander: BuiltinExpander,
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct MacroCallLoc {
pub def: MacroDefId,
@ -144,7 +165,7 @@ pub struct ExpansionInfo {
pub(crate) def_start: (HirFileId, TextUnit),
pub(crate) shift: u32,
pub(crate) macro_def: Arc<(mbe::MacroRules, mbe::TokenMap)>,
pub(crate) macro_def: Arc<(db::TokenExpander, mbe::TokenMap)>,
pub(crate) macro_arg: Arc<(tt::Subtree, mbe::TokenMap)>,
pub(crate) exp_map: Arc<mbe::RevTokenMap>,
}