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internal: reduce coupling

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tt is a data structure, data structures cant' go wrong, they shouldn't
have the knowledge that the world outside of them has all kinds of
errors.
This commit is contained in:
Aleksey Kladov 2021-08-31 19:14:33 +03:00
parent d8a3d6f378
commit 81602f8a5d
6 changed files with 25 additions and 32 deletions
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10
crates/base_db/src/input.rs
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@ -11,7 +11,7 @@ use std::{fmt, iter::FromIterator, ops, panic::RefUnwindSafe, str::FromStr, sync
use cfg::CfgOptions;
use rustc_hash::{FxHashMap, FxHashSet};
use syntax::SmolStr;
use tt::{ExpansionError, Subtree};
use tt::Subtree;
use vfs::{file_set::FileSet, FileId, VfsPath};
/// Files are grouped into source roots. A source root is a directory on the
@ -163,7 +163,13 @@ pub trait ProcMacroExpander: fmt::Debug + Send + Sync + RefUnwindSafe {
subtree: &Subtree,
attrs: Option<&Subtree>,
env: &Env,
) -> Result<Subtree, ExpansionError>;
) -> Result<Subtree, ProcMacroExpansionError>;
}
pub enum ProcMacroExpansionError {
Panic(String),
/// Things like "proc macro server was killed by OOM".
System(String),
}
#[derive(Debug, Clone)]