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Add more information on parse_macro fail

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This commit is contained in:
Edwin Cheng 2019-04-22 04:08:36 +08:00
parent da05bbcfb1
commit 9a5b9638c1
1 changed files with 26 additions and 9 deletions
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35
crates/ra_hir/src/ids.rs
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@ -63,11 +63,15 @@ impl HirFileId {
match file_id.0 { match file_id.0 {
HirFileIdRepr::File(file_id) => db.parse(file_id), HirFileIdRepr::File(file_id) => db.parse(file_id),
HirFileIdRepr::Macro(macro_call_id) => { HirFileIdRepr::Macro(macro_call_id) => {
parse_macro(db, macro_call_id).unwrap_or_else(|| { parse_macro(db, macro_call_id).unwrap_or_else(|err| {
// Note: // Note:
// The final goal we would like to make all parse_macro success, // The final goal we would like to make all parse_macro success,
// such that the following log will not call anyway. // such that the following log will not call anyway.
log::warn!("fail on macro_parse: {}", macro_call_id.debug_dump(db)); log::warn!(
"fail on macro_parse: (reason: {}) {}",
err,
macro_call_id.debug_dump(db)
);
// returning an empty string looks fishy... // returning an empty string looks fishy...
SourceFile::parse("") SourceFile::parse("")
@ -77,14 +81,20 @@ impl HirFileId {
} }
} }
fn parse_macro(db: &impl DefDatabase, macro_call_id: MacroCallId) -> Option<TreeArc<SourceFile>> { fn parse_macro(
db: &impl DefDatabase,
macro_call_id: MacroCallId,
) -> Result<TreeArc<SourceFile>, String> {
let loc = macro_call_id.loc(db); let loc = macro_call_id.loc(db);
let macro_call = loc.ast_id.to_node(db); let macro_call = loc.ast_id.to_node(db);
let (macro_arg, _) = macro_call.token_tree().and_then(mbe::ast_to_token_tree)?; let (macro_arg, _) = macro_call
.token_tree()
.and_then(mbe::ast_to_token_tree)
.ok_or("Fail to args in to tt::TokenTree")?;
let macro_rules = db.macro_def(loc.def)?; let macro_rules = db.macro_def(loc.def).ok_or("Fail to find macro definition")?;
let tt = macro_rules.expand(&macro_arg).ok()?; let tt = macro_rules.expand(&macro_arg).map_err(|err| format!("{:?}", err))?;
Some(mbe::token_tree_to_ast_item_list(&tt)) Ok(mbe::token_tree_to_ast_item_list(&tt))
} }
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
@ -311,11 +321,18 @@ impl MacroCallId {
pub fn debug_dump(&self, db: &impl DefDatabase) -> String { pub fn debug_dump(&self, db: &impl DefDatabase) -> String {
let loc = self.clone().loc(db); let loc = self.clone().loc(db);
let node = loc.ast_id.to_node(db); let node = loc.ast_id.to_node(db);
let syntax_str = node.syntax().to_string(); let syntax_str = node.syntax().text().chunks().collect::<Vec<_>>().join(" ");
// dump the file name // dump the file name
let file_id: HirFileId = self.clone().into(); let file_id: HirFileId = self.clone().into();
let original = file_id.original_file(db); let original = file_id.original_file(db);
format!("macro call [file: {:#?}] : {}", db.file_relative_path(original), syntax_str) let macro_rules = db.macro_def(loc.def);
format!(
"macro call [file: {:#?}] : {}\nhas rules: {}",
db.file_relative_path(original),
syntax_str,
macro_rules.is_some()
)
} }
} }