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Simplify

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This commit is contained in:
Lukas Wirth 2024-02-28 14:36:29 +01:00 • committed by Lukas Wirth
parent c8fdcea85c
commit ed7e9aa5d8
7 changed files with 77 additions and 76 deletions
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54
crates/proc-macro-srv/src/server.rs
View file

@ -54,33 +54,33 @@ fn spacing_to_external(spacing: Spacing) -> proc_macro::Spacing {
}
}
struct LiteralFormatter<S>(bridge::Literal<S, Symbol>);
impl<S> LiteralFormatter<S> {
/// 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,
interner: SymbolInternerRef,
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 = "\
/// 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 literal_with_stringify_parts<S, R>(
literal: &bridge::Literal<S, Symbol>,
interner: SymbolInternerRef,
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]
}
const _: () = assert!(HASHES.len() == 256);
&HASHES[..num as usize]
}
self.with_symbol_and_suffix(interner, |symbol, suffix| match self.0.kind {
{
let symbol = &*literal.symbol.text(interner);
let suffix = &*literal.suffix.map(|s| s.text(interner)).unwrap_or_default();
match literal.kind {
bridge::LitKind::Byte => f(&["b'", symbol, "'", suffix]),
bridge::LitKind::Char => f(&["'", symbol, "'", suffix]),
bridge::LitKind::Str => f(&["\"", symbol, "\"", suffix]),
@ -101,16 +101,6 @@ impl<S> LiteralFormatter<S> {
bridge::LitKind::Integer | bridge::LitKind::Float | bridge::LitKind::ErrWithGuar => {
f(&[symbol, suffix])
}
})
}
fn with_symbol_and_suffix<R>(
&self,
interner: SymbolInternerRef,
f: impl FnOnce(&str, &str) -> R,
) -> R {
let symbol = self.0.symbol.text(interner);
let suffix = self.0.suffix.map(|s| s.text(interner)).unwrap_or_default();
f(symbol.as_str(), suffix.as_str())
}
}
}

35
crates/proc-macro-srv/src/server/rust_analyzer_span.rs
View file

@ -15,8 +15,8 @@ use proc_macro::bridge::{self, server};
use span::{Span, FIXUP_ERASED_FILE_AST_ID_MARKER};
use crate::server::{
delim_to_external, delim_to_internal, token_stream::TokenStreamBuilder, LiteralFormatter,
Symbol, SymbolInternerRef, SYMBOL_INTERNER,
delim_to_external, delim_to_internal, literal_with_stringify_parts,
token_stream::TokenStreamBuilder, Symbol, SymbolInternerRef, SYMBOL_INTERNER,
};
mod tt {
pub use ::tt::*;
@ -180,12 +180,11 @@ impl server::TokenStream for RaSpanServer {
}
bridge::TokenTree::Literal(literal) => {
let literal = LiteralFormatter(literal);
let text = literal.with_stringify_parts(self.interner, |parts| {
let text = literal_with_stringify_parts(&literal, self.interner, |parts| {
::tt::SmolStr::from_iter(parts.iter().copied())
});
let literal = tt::Literal { text, span: literal.0.span };
let literal = tt::Literal { text, span: literal.span };
let leaf: tt::Leaf = tt::Leaf::from(literal);
let tree = tt::TokenTree::from(leaf);
Self::TokenStream::from_iter(iter::once(tree))
@ -251,10 +250,17 @@ impl server::TokenStream for RaSpanServer {
.into_iter()
.map(|tree| match tree {
tt::TokenTree::Leaf(tt::Leaf::Ident(ident)) => {
bridge::TokenTree::Ident(bridge::Ident {
sym: Symbol::intern(self.interner, ident.text.trim_start_matches("r#")),
is_raw: ident.text.starts_with("r#"),
span: ident.span,
bridge::TokenTree::Ident(match ident.text.strip_prefix("r#") {
Some(text) => bridge::Ident {
sym: Symbol::intern(self.interner, text),
is_raw: true,
span: ident.span,
},
None => bridge::Ident {
sym: Symbol::intern(self.interner, &ident.text),
is_raw: false,
span: ident.span,
},
})
}
tt::TokenTree::Leaf(tt::Leaf::Literal(lit)) => {
@ -285,11 +291,12 @@ impl server::TokenStream for RaSpanServer {
}
impl server::SourceFile for RaSpanServer {
// FIXME these are all stubs
fn eq(&mut self, _file1: &Self::SourceFile, _file2: &Self::SourceFile) -> bool {
// FIXME
true
}
fn path(&mut self, _file: &Self::SourceFile) -> String {
// FIXME
String::new()
}
fn is_real(&mut self, _file: &Self::SourceFile) -> bool {
@ -306,11 +313,15 @@ impl server::Span for RaSpanServer {
SourceFile {}
}
fn save_span(&mut self, _span: Self::Span) -> usize {
// FIXME stub, requires builtin quote! implementation
// FIXME, quote is incompatible with third-party tools
// This is called by the quote proc-macro which is expanded when the proc-macro is compiled
// As such, r-a will never observe this
0
}
fn recover_proc_macro_span(&mut self, _id: usize) -> Self::Span {
// FIXME stub, requires builtin quote! implementation
// FIXME, quote is incompatible with third-party tools
// This is called by the expansion of quote!, r-a will observe this, but we don't have
// access to the spans that were encoded
self.call_site
}
/// Recent feature, not yet in the proc_macro

10
crates/proc-macro-srv/src/server/token_id.rs
View file

@ -8,8 +8,8 @@ use std::{
use proc_macro::bridge::{self, server};
use crate::server::{
delim_to_external, delim_to_internal, token_stream::TokenStreamBuilder, LiteralFormatter,
Symbol, SymbolInternerRef, SYMBOL_INTERNER,
delim_to_external, delim_to_internal, literal_with_stringify_parts,
token_stream::TokenStreamBuilder, Symbol, SymbolInternerRef, SYMBOL_INTERNER,
};
mod tt {
pub use proc_macro_api::msg::TokenId;
@ -171,12 +171,12 @@ impl server::TokenStream for TokenIdServer {
}
bridge::TokenTree::Literal(literal) => {
let literal = LiteralFormatter(literal);
let text = literal.with_stringify_parts(self.interner, |parts| {
let text = literal_with_stringify_parts(&literal, self.interner, |parts| {
::tt::SmolStr::from_iter(parts.iter().copied())
});
let literal = tt::Literal { text, span: literal.0.span };
let literal = tt::Literal { text, span: literal.span };
let leaf = tt::Leaf::from(literal);
let tree = TokenTree::from(leaf);
Self::TokenStream::from_iter(iter::once(tree))