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use crate::parse::ParseSess;
use crate::session::Session;
use rustc_ast::token::{self, Delimiter, Nonterminal, Token};
use rustc_ast::tokenstream::CanSynthesizeMissingTokens;
use rustc_ast::tokenstream::{DelimSpan, TokenStream, TokenTree};
use rustc_data_structures::profiling::VerboseTimingGuard;
use std::path::{Path, PathBuf};
pub type NtToTokenstream = fn(&Nonterminal, &ParseSess, CanSynthesizeMissingTokens) -> TokenStream;
impl Session {
pub fn timer<'a>(&'a self, what: &'static str) -> VerboseTimingGuard<'a> {
self.prof.verbose_generic_activity(what)
}
pub fn time<R>(&self, what: &'static str, f: impl FnOnce() -> R) -> R {
self.prof.verbose_generic_activity(what).run(f)
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Encodable, Decodable)]
#[derive(HashStable_Generic)]
pub enum NativeLibKind {
/// Static library (e.g. `libfoo.a` on Linux or `foo.lib` on Windows/MSVC)
Static {
/// Whether to bundle objects from static library into produced rlib
bundle: Option<bool>,
/// Whether to link static library without throwing any object files away
whole_archive: Option<bool>,
},
/// Dynamic library (e.g. `libfoo.so` on Linux)
/// or an import library corresponding to a dynamic library (e.g. `foo.lib` on Windows/MSVC).
Dylib {
/// Whether the dynamic library will be linked only if it satisfies some undefined symbols
as_needed: Option<bool>,
},
/// Dynamic library (e.g. `foo.dll` on Windows) without a corresponding import library.
RawDylib,
/// A macOS-specific kind of dynamic libraries.
Framework {
/// Whether the framework will be linked only if it satisfies some undefined symbols
as_needed: Option<bool>,
},
/// The library kind wasn't specified, `Dylib` is currently used as a default.
Unspecified,
}
impl NativeLibKind {
pub fn has_modifiers(&self) -> bool {
match self {
NativeLibKind::Static { bundle, whole_archive } => {
bundle.is_some() || whole_archive.is_some()
}
NativeLibKind::Dylib { as_needed } | NativeLibKind::Framework { as_needed } => {
as_needed.is_some()
}
NativeLibKind::RawDylib | NativeLibKind::Unspecified => false,
}
}
}
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Encodable, Decodable)]
#[derive(HashStable_Generic)]
pub struct NativeLib {
pub name: String,
pub new_name: Option<String>,
pub kind: NativeLibKind,
pub verbatim: Option<bool>,
}
impl NativeLib {
pub fn has_modifiers(&self) -> bool {
self.verbatim.is_some() || self.kind.has_modifiers()
}
}
/// A path that has been canonicalized along with its original, non-canonicalized form
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
pub struct CanonicalizedPath {
// Optional since canonicalization can sometimes fail
canonicalized: Option<PathBuf>,
original: PathBuf,
}
impl CanonicalizedPath {
pub fn new(path: &Path) -> Self {
Self { original: path.to_owned(), canonicalized: std::fs::canonicalize(path).ok() }
}
pub fn canonicalized(&self) -> &PathBuf {
self.canonicalized.as_ref().unwrap_or(self.original())
}
pub fn original(&self) -> &PathBuf {
&self.original
}
}
// FIXME: Find a better spot for this - it needs to be accessible from `rustc_ast_lowering`,
// and needs to access `ParseSess
pub struct FlattenNonterminals<'a> {
pub parse_sess: &'a ParseSess,
pub synthesize_tokens: CanSynthesizeMissingTokens,
pub nt_to_tokenstream: NtToTokenstream,
}
impl<'a> FlattenNonterminals<'a> {
pub fn process_token_stream(&mut self, tokens: TokenStream) -> TokenStream {
fn can_skip(stream: &TokenStream) -> bool {
stream.trees().all(|tree| match tree {
TokenTree::Token(token) => !matches!(token.kind, token::Interpolated(_)),
TokenTree::Delimited(_, _, inner) => can_skip(&inner),
})
}
if can_skip(&tokens) {
return tokens;
}
tokens.into_trees().flat_map(|tree| self.process_token_tree(tree).into_trees()).collect()
}
pub fn process_token_tree(&mut self, tree: TokenTree) -> TokenStream {
match tree {
TokenTree::Token(token) => self.process_token(token),
TokenTree::Delimited(span, delim, tts) => {
TokenTree::Delimited(span, delim, self.process_token_stream(tts)).into()
}
}
}
pub fn process_token(&mut self, token: Token) -> TokenStream {
match token.kind {
token::Interpolated(nt) if let token::NtIdent(ident, is_raw) = *nt => {
TokenTree::Token(Token::new(token::Ident(ident.name, is_raw), ident.span)).into()
}
token::Interpolated(nt) => {
let tts = (self.nt_to_tokenstream)(&nt, self.parse_sess, self.synthesize_tokens);
TokenTree::Delimited(
DelimSpan::from_single(token.span),
Delimiter::Invisible,
self.process_token_stream(tts),
)
.into()
}
_ => TokenTree::Token(token).into(),
}
}
}
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