Add experiment to produce precompiled builds of serde_derive

precompiled/proc-macro2/src/lib.rs

@@ -0,0 +1,816 @@
+#[doc(hidden)]
+pub mod watt;
+
+use crate::extra::DelimSpan;
+use crate::watt::Identity;
+use std::cmp::Ordering;
+use std::fmt::{self, Debug, Display};
+use std::hash::{Hash, Hasher};
+use std::ops::RangeBounds;
+use std::str::FromStr;
+
+pub use proc_macro2::{Delimiter, Spacing};
+
+#[derive(Copy, Clone)]
+pub struct Span {
+    lo: u32,
+    hi: u32,
+}
+
+impl Span {
+    pub fn call_site() -> Self {
+        Span { lo: 0, hi: 0 }
+    }
+
+    pub fn join(&self, other: Self) -> Option<Self> {
+        Some(Span {
+            lo: self.lo,
+            hi: other.hi,
+        })
+    }
+}
+
+#[derive(Clone)]
+pub enum TokenTree {
+    Group(Group),
+    Ident(Ident),
+    Punct(Punct),
+    Literal(Literal),
+}
+
+impl TokenTree {
+    pub fn span(&self) -> Span {
+        match self {
+            TokenTree::Group(group) => group.span(),
+            TokenTree::Ident(ident) => ident.span(),
+            TokenTree::Punct(punct) => punct.span(),
+            TokenTree::Literal(literal) => literal.span(),
+        }
+    }
+
+    pub fn set_span(&mut self, span: Span) {
+        match self {
+            TokenTree::Group(group) => group.set_span(span),
+            TokenTree::Ident(ident) => ident.set_span(span),
+            TokenTree::Punct(punct) => punct.set_span(span),
+            TokenTree::Literal(literal) => literal.set_span(span),
+        }
+    }
+}
+
+impl From<Group> for TokenTree {
+    fn from(group: Group) -> Self {
+        TokenTree::Group(group)
+    }
+}
+
+impl From<Ident> for TokenTree {
+    fn from(ident: Ident) -> Self {
+        TokenTree::Ident(ident)
+    }
+}
+
+impl From<Punct> for TokenTree {
+    fn from(punct: Punct) -> Self {
+        TokenTree::Punct(punct)
+    }
+}
+
+impl From<Literal> for TokenTree {
+    fn from(literal: Literal) -> Self {
+        TokenTree::Literal(literal)
+    }
+}
+
+impl Debug for TokenTree {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            TokenTree::Group(group) => Debug::fmt(group, formatter),
+            TokenTree::Ident(ident) => {
+                let mut debug = formatter.debug_struct("Ident");
+                debug.field("sym", &format_args!("{}", ident));
+                debug.finish()
+            }
+            TokenTree::Punct(punct) => Debug::fmt(punct, formatter),
+            TokenTree::Literal(literal) => Debug::fmt(literal, formatter),
+        }
+    }
+}
+
+#[derive(Clone)]
+pub struct Group {
+    delimiter: Delimiter,
+    stream: Vec<TokenTree>,
+    span: Span,
+    span_open: Span,
+    span_close: Span,
+    identity: u32,
+}
+
+impl Group {
+    pub fn new(delimiter: Delimiter, stream: TokenStream) -> Self {
+        Group {
+            delimiter,
+            stream: stream.content,
+            span: Span::call_site(),
+            span_open: Span::call_site(),
+            span_close: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn stream(&self) -> TokenStream {
+        TokenStream {
+            content: self.stream.clone(),
+        }
+    }
+
+    pub fn delimiter(&self) -> Delimiter {
+        self.delimiter
+    }
+
+    pub fn span(&self) -> Span {
+        self.span
+    }
+
+    pub fn span_open(&self) -> Span {
+        self.span_open
+    }
+
+    pub fn span_close(&self) -> Span {
+        self.span_close
+    }
+
+    pub fn delim_span(&self) -> DelimSpan {
+        DelimSpan {
+            open: self.span_open(),
+            close: self.span_close(),
+        }
+    }
+
+    pub fn set_span(&mut self, span: Span) {
+        self.span = span;
+        self.identity |= Identity::RESPANNED;
+    }
+}
+
+impl Display for Group {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        let (open, close) = match self.delimiter {
+            Delimiter::Parenthesis => ("(", ")"),
+            Delimiter::Brace => ("{ ", "}"),
+            Delimiter::Bracket => ("[", "]"),
+            Delimiter::None => ("", ""),
+        };
+
+        formatter.write_str(open)?;
+        display_tokens(&self.stream, formatter)?;
+        if self.delimiter == Delimiter::Brace && !self.stream.is_empty() {
+            formatter.write_str(" ")?;
+        }
+        formatter.write_str(close)?;
+
+        Ok(())
+    }
+}
+
+impl Debug for Group {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        let mut debug = formatter.debug_struct("Group");
+        debug.field("delimiter", &self.delimiter);
+        debug.field("stream", &self.stream);
+        debug.finish()
+    }
+}
+
+#[derive(Clone)]
+pub struct Ident {
+    fallback: proc_macro2::Ident,
+    span: Span,
+    identity: u32,
+}
+
+impl Ident {
+    pub fn new(string: &str, span: Span) -> Self {
+        Ident {
+            fallback: proc_macro2::Ident::new(string, proc_macro2::Span::call_site()),
+            span,
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn new_raw(string: &str, span: Span) -> Self {
+        Ident {
+            fallback: proc_macro2::Ident::new_raw(string, proc_macro2::Span::call_site()),
+            span,
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn span(&self) -> Span {
+        self.span
+    }
+
+    pub fn set_span(&mut self, span: Span) {
+        self.span = span;
+        self.identity |= Identity::RESPANNED;
+    }
+}
+
+impl Display for Ident {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        Display::fmt(&self.fallback, formatter)
+    }
+}
+
+impl Debug for Ident {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        Debug::fmt(&self.fallback, formatter)
+    }
+}
+
+impl Eq for Ident {}
+
+impl PartialEq for Ident {
+    fn eq(&self, other: &Self) -> bool {
+        PartialEq::eq(&self.fallback, &other.fallback)
+    }
+}
+
+impl<T> PartialEq<T> for Ident
+where
+    T: ?Sized + AsRef<str>,
+{
+    fn eq(&self, other: &T) -> bool {
+        PartialEq::eq(&self.fallback, other)
+    }
+}
+
+impl Ord for Ident {
+    fn cmp(&self, other: &Self) -> Ordering {
+        Ord::cmp(&self.fallback, &other.fallback)
+    }
+}
+
+impl PartialOrd for Ident {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        PartialOrd::partial_cmp(&self.fallback, &other.fallback)
+    }
+}
+
+impl Hash for Ident {
+    fn hash<H: Hasher>(&self, hasher: &mut H) {
+        Hash::hash(&self.fallback, hasher);
+    }
+}
+
+#[derive(Clone)]
+pub struct Punct {
+    fallback: proc_macro2::Punct,
+    span: Span,
+    identity: u32,
+}
+
+impl Punct {
+    pub fn new(ch: char, spacing: Spacing) -> Self {
+        Punct {
+            fallback: proc_macro2::Punct::new(ch, spacing),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn as_char(&self) -> char {
+        self.fallback.as_char()
+    }
+
+    pub fn spacing(&self) -> Spacing {
+        self.fallback.spacing()
+    }
+
+    pub fn span(&self) -> Span {
+        self.span
+    }
+
+    pub fn set_span(&mut self, span: Span) {
+        self.span = span;
+        self.identity |= Identity::RESPANNED;
+    }
+}
+
+impl Display for Punct {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        Display::fmt(&self.fallback, formatter)
+    }
+}
+
+impl Debug for Punct {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        Debug::fmt(&self.fallback, formatter)
+    }
+}
+
+#[derive(Clone)]
+pub struct Literal {
+    fallback: proc_macro2::Literal,
+    span: Span,
+    identity: u32,
+}
+
+impl Literal {
+    pub fn u8_suffixed(n: u8) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::u8_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn u16_suffixed(n: u16) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::u16_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn u32_suffixed(n: u32) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::u32_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn u64_suffixed(n: u64) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::u64_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn u128_suffixed(n: u128) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::u128_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn usize_suffixed(n: usize) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::usize_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn i8_suffixed(n: i8) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::i8_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn i16_suffixed(n: i16) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::i16_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn i32_suffixed(n: i32) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::i32_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn i64_suffixed(n: i64) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::i64_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn i128_suffixed(n: i128) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::i128_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn isize_suffixed(n: isize) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::isize_suffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn u8_unsuffixed(n: u8) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::u8_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn u16_unsuffixed(n: u16) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::u16_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn u32_unsuffixed(n: u32) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::u32_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn u64_unsuffixed(n: u64) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::u64_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn u128_unsuffixed(n: u128) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::u128_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn usize_unsuffixed(n: usize) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::usize_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn i8_unsuffixed(n: i8) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::i8_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn i16_unsuffixed(n: i16) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::i16_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn i32_unsuffixed(n: i32) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::i32_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn i64_unsuffixed(n: i64) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::i64_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn i128_unsuffixed(n: i128) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::i128_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn isize_unsuffixed(n: isize) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::isize_unsuffixed(n),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn f64_unsuffixed(f: f64) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::f64_unsuffixed(f),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn f64_suffixed(f: f64) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::f64_suffixed(f),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn f32_unsuffixed(f: f32) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::f32_unsuffixed(f),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn f32_suffixed(f: f32) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::f32_suffixed(f),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn string(string: &str) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::string(string),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn character(ch: char) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::character(ch),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn byte_string(s: &[u8]) -> Self {
+        Literal {
+            fallback: proc_macro2::Literal::byte_string(s),
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        }
+    }
+
+    pub fn span(&self) -> Span {
+        self.span
+    }
+
+    pub fn set_span(&mut self, span: Span) {
+        self.span = span;
+        self.identity |= Identity::RESPANNED;
+    }
+
+    pub fn subspan<R: RangeBounds<usize>>(&self, range: R) -> Option<Span> {
+        let _ = range;
+        None
+    }
+}
+
+impl FromStr for Literal {
+    type Err = LexError;
+
+    fn from_str(repr: &str) -> Result<Self, Self::Err> {
+        let fallback = match proc_macro2::Literal::from_str(repr) {
+            Ok(literal) => literal,
+            Err(error) => {
+                return Err(LexError {
+                    fallback: error,
+                    span: Span::call_site(),
+                });
+            }
+        };
+        Ok(Literal {
+            fallback,
+            span: Span::call_site(),
+            identity: Identity::NOVEL,
+        })
+    }
+}
+
+impl Display for Literal {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        Display::fmt(&self.fallback, formatter)
+    }
+}
+
+impl Debug for Literal {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        Debug::fmt(&self.fallback, formatter)
+    }
+}
+
+#[derive(Clone)]
+pub struct TokenStream {
+    content: Vec<TokenTree>,
+}
+
+impl TokenStream {
+    pub fn new() -> Self {
+        TokenStream {
+            content: Vec::new(),
+        }
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.content.is_empty()
+    }
+}
+
+impl IntoIterator for TokenStream {
+    type Item = TokenTree;
+    type IntoIter = token_stream::IntoIter;
+
+    fn into_iter(self) -> Self::IntoIter {
+        token_stream::IntoIter {
+            iter: self.content.into_iter(),
+        }
+    }
+}
+
+impl Extend<TokenStream> for TokenStream {
+    fn extend<I: IntoIterator<Item = TokenStream>>(&mut self, streams: I) {
+        self.content.extend(streams.into_iter().flatten());
+    }
+}
+
+impl Extend<TokenTree> for TokenStream {
+    fn extend<I: IntoIterator<Item = TokenTree>>(&mut self, streams: I) {
+        self.content.extend(streams);
+    }
+}
+
+impl FromIterator<TokenStream> for TokenStream {
+    fn from_iter<I: IntoIterator<Item = TokenStream>>(streams: I) -> Self {
+        let content = streams.into_iter().flatten().collect();
+        TokenStream { content }
+    }
+}
+
+impl FromIterator<TokenTree> for TokenStream {
+    fn from_iter<I: IntoIterator<Item = TokenTree>>(streams: I) -> Self {
+        let content = streams.into_iter().collect();
+        TokenStream { content }
+    }
+}
+
+impl FromStr for TokenStream {
+    type Err = LexError;
+
+    fn from_str(string: &str) -> Result<Self, Self::Err> {
+        let fallback = match proc_macro2::TokenStream::from_str(string) {
+            Ok(token_stream) => token_stream,
+            Err(error) => {
+                return Err(LexError {
+                    fallback: error,
+                    span: Span::call_site(),
+                });
+            }
+        };
+
+        fn convert_token_stream(stream: proc_macro2::TokenStream) -> TokenStream {
+            TokenStream {
+                content: stream.into_iter().map(convert_token_tree).collect(),
+            }
+        }
+
+        fn convert_token_tree(token: proc_macro2::TokenTree) -> TokenTree {
+            match token {
+                proc_macro2::TokenTree::Group(group) => TokenTree::Group(Group::new(
+                    group.delimiter(),
+                    convert_token_stream(group.stream()),
+                )),
+                proc_macro2::TokenTree::Ident(ident) => TokenTree::Ident(Ident {
+                    fallback: ident,
+                    span: Span::call_site(),
+                    identity: Identity::NOVEL,
+                }),
+                proc_macro2::TokenTree::Punct(punct) => TokenTree::Punct(Punct {
+                    fallback: punct,
+                    span: Span::call_site(),
+                    identity: Identity::NOVEL,
+                }),
+                proc_macro2::TokenTree::Literal(literal) => TokenTree::Literal(Literal {
+                    fallback: literal,
+                    span: Span::call_site(),
+                    identity: Identity::NOVEL,
+                }),
+            }
+        }
+
+        Ok(convert_token_stream(fallback))
+    }
+}
+
+fn display_tokens(tokens: &[TokenTree], formatter: &mut fmt::Formatter) -> fmt::Result {
+    let mut joint = false;
+    for (i, token) in tokens.iter().enumerate() {
+        if i != 0 && !joint {
+            write!(formatter, " ")?;
+        }
+        joint = false;
+        match token {
+            TokenTree::Group(group) => Display::fmt(group, formatter),
+            TokenTree::Ident(ident) => Display::fmt(ident, formatter),
+            TokenTree::Punct(punct) => {
+                joint = punct.spacing() == Spacing::Joint;
+                Display::fmt(punct, formatter)
+            }
+            TokenTree::Literal(literal) => Display::fmt(literal, formatter),
+        }?;
+    }
+
+    Ok(())
+}
+
+impl Display for TokenStream {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        display_tokens(&self.content, formatter)
+    }
+}
+
+impl Debug for TokenStream {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str("TokenStream ")?;
+        formatter.debug_list().entries(&self.content).finish()
+    }
+}
+
+pub struct LexError {
+    fallback: proc_macro2::LexError,
+    span: Span,
+}
+
+impl LexError {
+    pub fn span(&self) -> Span {
+        self.span
+    }
+}
+
+impl Debug for LexError {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        Debug::fmt(&self.fallback, formatter)
+    }
+}
+
+pub mod token_stream {
+    use super::*;
+
+    #[derive(Clone)]
+    pub struct IntoIter {
+        pub(crate) iter: <Vec<TokenTree> as IntoIterator>::IntoIter,
+    }
+
+    impl Iterator for IntoIter {
+        type Item = TokenTree;
+
+        fn next(&mut self) -> Option<Self::Item> {
+            self.iter.next()
+        }
+
+        fn size_hint(&self) -> (usize, Option<usize>) {
+            self.iter.size_hint()
+        }
+    }
+}
+
+pub mod extra {
+    use crate::Span;
+
+    #[derive(Copy, Clone)]
+    pub struct DelimSpan {
+        pub(crate) open: Span,
+        pub(crate) close: Span,
+    }
+
+    impl DelimSpan {
+        pub fn join(&self) -> Span {
+            Span {
+                lo: self.open.lo,
+                hi: self.close.hi,
+            }
+        }
+
+        pub fn open(&self) -> Span {
+            self.open
+        }
+
+        pub fn close(&self) -> Span {
+            self.close
+        }
+    }
+}