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Stringify literals create client-side properly

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This commit is contained in:
Amos Wenger 2022-07-21 18:44:41 +02:00
parent 36d825fd5d
commit 9cf99a9c71
2 changed files with 51 additions and 11 deletions
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61
crates/proc-macro-srv/src/abis/abi_sysroot/ra_server.rs
View file

@ -132,17 +132,11 @@ impl server::TokenStream for RustAnalyzer {
}
bridge::TokenTree::Literal(literal) => {
// FIXME: remove unnecessary clones here
let symbol = ThreadLocalSymbolInterner::get_cloned(&literal.symbol);
let literal = LiteralFormatter(literal);
let text = literal
.with_stringify_parts(|parts| tt::SmolStr::from_iter(parts.iter().copied()));
let text: tt::SmolStr = if let Some(suffix) = literal.suffix {
let suffix = ThreadLocalSymbolInterner::get_cloned(&suffix);
format!("{symbol}{suffix}").into()
} else {
symbol
};
let literal = tt::Literal { text, id: literal.span };
let literal = tt::Literal { text, id: literal.0.span };
let leaf = tt::Leaf::from(literal);
let tree = TokenTree::from(leaf);
Self::TokenStream::from_iter(vec![tree])
@ -416,6 +410,53 @@ impl server::Server for RustAnalyzer {
}
}
struct LiteralFormatter(bridge::Literal<tt::TokenId, Symbol>);
impl LiteralFormatter {
/// Invokes the callback with a `&[&str]` consisting of each part of the
/// literal's representation. This is done to allow the `ToString` and
/// `Display` implementations to borrow references to symbol values, and
/// both be optimized to reduce overhead.
fn with_stringify_parts<R>(&self, f: impl FnOnce(&[&str]) -> R) -> R {
/// Returns a string containing exactly `num` '#' characters.
/// Uses a 256-character source string literal which is always safe to
/// index with a `u8` index.
fn get_hashes_str(num: u8) -> &'static str {
const HASHES: &str = "\
################################################################\
################################################################\
################################################################\
################################################################\
";
const _: () = assert!(HASHES.len() == 256);
&HASHES[..num as usize]
}
self.with_symbol_and_suffix(|symbol, suffix| match self.0.kind {
bridge::LitKind::Byte => f(&["b'", symbol, "'", suffix]),
bridge::LitKind::Char => f(&["'", symbol, "'", suffix]),
bridge::LitKind::Str => f(&["\"", symbol, "\"", suffix]),
bridge::LitKind::StrRaw(n) => {
let hashes = get_hashes_str(n);
f(&["r", hashes, "\"", symbol, "\"", hashes, suffix])
}
bridge::LitKind::ByteStr => f(&["b\"", symbol, "\"", suffix]),
bridge::LitKind::ByteStrRaw(n) => {
let hashes = get_hashes_str(n);
f(&["br", hashes, "\"", symbol, "\"", hashes, suffix])
}
_ => f(&[symbol, suffix]),
})
}
fn with_symbol_and_suffix<R>(&self, f: impl FnOnce(&str, &str) -> R) -> R {
ThreadLocalSymbolInterner::with(&self.0.symbol, |symbol| match self.0.suffix.as_ref() {
Some(suffix) => ThreadLocalSymbolInterner::with(suffix, |suffix| f(symbol, suffix)),
None => f(symbol, ""),
})
}
}
#[cfg(test)]
mod tests {
use super::*;

1
crates/proc-macro-srv/src/tests/mod.rs
View file

@ -77,7 +77,6 @@ fn test_fn_like_mk_literals() {
LITERAL b"byte_string" 4294967295
LITERAL 'c' 4294967295
LITERAL "string" 4294967295
LITERAL "maybe \"raw\"?" 4294967295
LITERAL 3.14f64 4294967295
LITERAL 3.14 4294967295
LITERAL 123i64 4294967295