#![allow(clippy::crate_in_macro_def)]
use intern::{sym, Symbol};
use span::Span;
use syntax::ToSmolStr;
use tt::IdentIsRaw;
use crate::{name::Name, tt::TopSubtreeBuilder};
pub(crate) fn dollar_crate(span: Span) -> tt::Ident<Span> {
tt::Ident { sym: sym::dollar_crate.clone(), span, is_raw: tt::IdentIsRaw::No }
}
#[doc(hidden)]
#[macro_export]
macro_rules! quote_impl__ {
($span:ident $builder:ident) => {};
( @SUBTREE($span:ident $builder:ident) $delim:ident $($tt:tt)* ) => {
{
$builder.open($crate::tt::DelimiterKind::$delim, $span);
$crate::builtin::quote::__quote!($span $builder $($tt)*);
$builder.close($span);
}
};
( @PUNCT($span:ident $builder:ident) $first:literal ) => {
$builder.push(
$crate::tt::Leaf::Punct($crate::tt::Punct {
char: $first,
spacing: $crate::tt::Spacing::Alone,
span: $span,
})
);
};
( @PUNCT($span:ident $builder:ident) $first:literal, $sec:literal ) => {
$builder.extend([
$crate::tt::Leaf::Punct($crate::tt::Punct {
char: $first,
spacing: $crate::tt::Spacing::Joint,
span: $span,
}),
$crate::tt::Leaf::Punct($crate::tt::Punct {
char: $sec,
spacing: $crate::tt::Spacing::Alone,
span: $span,
})
]);
};
($span:ident $builder:ident # $first:ident $($tail:tt)* ) => {
$crate::builtin::quote::ToTokenTree::to_tokens($first, $span, $builder);
$crate::builtin::quote::__quote!($span $builder $($tail)*);
};
($span:ident $builder:ident ## $first:ident $($tail:tt)* ) => {{
::std::iter::IntoIterator::into_iter($first).for_each(|it| $crate::builtin::quote::ToTokenTree::to_tokens(it, $span, $builder));
$crate::builtin::quote::__quote!($span $builder $($tail)*);
}};
($span:ident $builder:ident { $($tt:tt)* } ) => { $crate::builtin::quote::__quote!(@SUBTREE($span $builder) Brace $($tt)*) };
($span:ident $builder:ident [ $($tt:tt)* ] ) => { $crate::builtin::quote::__quote!(@SUBTREE($span $builder) Bracket $($tt)*) };
($span:ident $builder:ident ( $($tt:tt)* ) ) => { $crate::builtin::quote::__quote!(@SUBTREE($span $builder) Parenthesis $($tt)*) };
($span:ident $builder:ident $tt:literal ) => { $crate::builtin::quote::ToTokenTree::to_tokens($tt, $span, $builder) };
($span:ident $builder:ident $tt:ident ) => {
$builder.push(
$crate::tt::Leaf::Ident($crate::tt::Ident {
sym: intern::Symbol::intern(stringify!($tt)),
span: $span,
is_raw: tt::IdentIsRaw::No,
})
);
};
($span:ident $builder:ident -> ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '-', '>')};
($span:ident $builder:ident => ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '=', '>')};
($span:ident $builder:ident & ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '&')};
($span:ident $builder:ident , ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) ',')};
($span:ident $builder:ident : ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) ':')};
($span:ident $builder:ident ; ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) ';')};
($span:ident $builder:ident :: ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) ':', ':')};
($span:ident $builder:ident . ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '.')};
($span:ident $builder:ident < ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '<')};
($span:ident $builder:ident > ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '>')};
($span:ident $builder:ident ! ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '!')};
($span:ident $builder:ident # ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '#')};
($span:ident $builder:ident $ ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '$')};
($span:ident $builder:ident * ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '*')};
($span:ident $builder:ident = ) => {$crate::builtin::quote::__quote!(@PUNCT($span $builder) '=')};
($span:ident $builder:ident $first:tt $($tail:tt)+ ) => {{
$crate::builtin::quote::__quote!($span $builder $first);
$crate::builtin::quote::__quote!($span $builder $($tail)*);
}};
}
pub use quote_impl__ as __quote;
#[macro_export]
macro_rules! quote {
($span:ident=> $($tt:tt)* ) => {
{
let mut builder = $crate::tt::TopSubtreeBuilder::new($crate::tt::Delimiter {
kind: $crate::tt::DelimiterKind::Invisible,
open: $span,
close: $span,
});
#[allow(unused)]
let builder_ref = &mut builder;
$crate::builtin::quote::__quote!($span builder_ref $($tt)*);
builder.build_skip_top_subtree()
}
}
}
pub(super) use quote;
pub trait ToTokenTree {
fn to_tokens(self, span: Span, builder: &mut TopSubtreeBuilder);
}
pub struct WithDelimiter<'a> {
pub delimiter: crate::tt::Delimiter,
pub token_trees: crate::tt::TokenTreesView<'a>,
}
impl ToTokenTree for WithDelimiter<'_> {
fn to_tokens(self, span: Span, builder: &mut TopSubtreeBuilder) {
builder.open(self.delimiter.kind, self.delimiter.open);
self.token_trees.to_tokens(span, builder);
builder.close(self.delimiter.close);
}
}
impl ToTokenTree for crate::tt::TokenTreesView<'_> {
fn to_tokens(self, _: Span, builder: &mut TopSubtreeBuilder) {
builder.extend_with_tt(self);
}
}
impl ToTokenTree for crate::tt::SubtreeView<'_> {
fn to_tokens(self, _: Span, builder: &mut TopSubtreeBuilder) {
builder.extend_with_tt(self.as_token_trees());
}
}
impl ToTokenTree for crate::tt::TopSubtree {
fn to_tokens(self, _: Span, builder: &mut TopSubtreeBuilder) {
builder.extend_tt_dangerous(self.0);
}
}
impl ToTokenTree for crate::tt::TtElement<'_> {
fn to_tokens(self, _: Span, builder: &mut TopSubtreeBuilder) {
match self {
crate::tt::TtElement::Leaf(leaf) => builder.push(leaf.clone()),
crate::tt::TtElement::Subtree(subtree, subtree_iter) => {
builder.extend_tt_dangerous(
std::iter::once(crate::tt::TokenTree::Subtree(subtree.clone()))
.chain(subtree_iter.remaining().flat_tokens().iter().cloned()),
);
}
}
}
}
macro_rules! impl_to_to_tokentrees {
($($span:ident: $ty:ty => $this:ident $im:block;)*) => {
$(
impl ToTokenTree for $ty {
fn to_tokens($this, $span: Span, builder: &mut TopSubtreeBuilder) {
let leaf: crate::tt::Leaf = $im.into();
builder.push(leaf);
}
}
)*
}
}
impl<T: ToTokenTree + Clone> ToTokenTree for &T {
fn to_tokens(self, span: Span, builder: &mut TopSubtreeBuilder) {
self.clone().to_tokens(span, builder);
}
}
impl_to_to_tokentrees! {
span: u32 => self { crate::tt::Literal{symbol: Symbol::integer(self as _), span, kind: tt::LitKind::Integer, suffix: None } };
span: usize => self { crate::tt::Literal{symbol: Symbol::integer(self as _), span, kind: tt::LitKind::Integer, suffix: None } };
span: i32 => self { crate::tt::Literal{symbol: Symbol::integer(self as _), span, kind: tt::LitKind::Integer, suffix: None } };
span: bool => self { crate::tt::Ident{sym: if self { sym::true_.clone() } else { sym::false_.clone() }, span, is_raw: tt::IdentIsRaw::No } };
_span: crate::tt::Leaf => self { self };
_span: crate::tt::Literal => self { self };
_span: crate::tt::Ident => self { self };
_span: crate::tt::Punct => self { self };
span: &str => self { crate::tt::Literal{symbol: Symbol::intern(&self.escape_default().to_smolstr()), span, kind: tt::LitKind::Str, suffix: None }};
span: String => self { crate::tt::Literal{symbol: Symbol::intern(&self.escape_default().to_smolstr()), span, kind: tt::LitKind::Str, suffix: None }};
span: Name => self {
let (is_raw, s) = IdentIsRaw::split_from_symbol(self.as_str());
crate::tt::Ident{sym: Symbol::intern(s), span, is_raw }
};
span: Symbol => self {
let (is_raw, s) = IdentIsRaw::split_from_symbol(self.as_str());
crate::tt::Ident{sym: Symbol::intern(s), span, is_raw }
};
}
#[cfg(test)]
mod tests {
use crate::tt;
use ::tt::IdentIsRaw;
use expect_test::expect;
use intern::Symbol;
use span::{Edition, SpanAnchor, SyntaxContextId, ROOT_ERASED_FILE_AST_ID};
use syntax::{TextRange, TextSize};
use super::quote;
const DUMMY: tt::Span = tt::Span {
range: TextRange::empty(TextSize::new(0)),
anchor: SpanAnchor {
file_id: span::EditionedFileId::new(
span::FileId::from_raw(0xe4e4e),
span::Edition::CURRENT,
),
ast_id: ROOT_ERASED_FILE_AST_ID,
},
ctx: SyntaxContextId::root(Edition::CURRENT),
};
#[test]
fn test_quote_delimiters() {
assert_eq!(quote!(DUMMY =>{}).to_string(), "{}");
assert_eq!(quote!(DUMMY =>()).to_string(), "()");
assert_eq!(quote!(DUMMY =>[]).to_string(), "[]");
}
#[test]
fn test_quote_idents() {
assert_eq!(quote!(DUMMY =>32).to_string(), "32");
assert_eq!(quote!(DUMMY =>struct).to_string(), "struct");
}
#[test]
fn test_quote_hash_simple_literal() {
let a = 20;
assert_eq!(quote!(DUMMY =>#a).to_string(), "20");
let s: String = "hello".into();
assert_eq!(quote!(DUMMY =>#s).to_string(), "\"hello\"");
}
fn mk_ident(name: &str) -> crate::tt::Ident {
let (is_raw, s) = IdentIsRaw::split_from_symbol(name);
crate::tt::Ident { sym: Symbol::intern(s), span: DUMMY, is_raw }
}
#[test]
fn test_quote_hash_token_tree() {
let a = mk_ident("hello");
let quoted = quote!(DUMMY =>#a);
assert_eq!(quoted.to_string(), "hello");
let t = format!("{quoted:#?}");
expect![[r#"
SUBTREE $$ 937550:0@0..0#2 937550:0@0..0#2
IDENT hello 937550:0@0..0#2"#]]
.assert_eq(&t);
}
#[test]
fn test_quote_simple_derive_copy() {
let name = mk_ident("Foo");
let quoted = quote! {DUMMY =>
impl Clone for #name {
fn clone(&self) -> Self {
Self {}
}
}
};
assert_eq!(quoted.to_string(), "impl Clone for Foo {fn clone (& self) -> Self {Self {}}}");
}
#[test]
fn test_quote_derive_copy_hack() {
let struct_name = mk_ident("Foo");
let fields = [mk_ident("name"), mk_ident("id")];
let fields = fields.iter().map(|it| quote!(DUMMY =>#it: self.#it.clone(), ));
let mut builder = tt::TopSubtreeBuilder::new(crate::tt::Delimiter {
kind: crate::tt::DelimiterKind::Brace,
open: DUMMY,
close: DUMMY,
});
fields.for_each(|field| builder.extend_with_tt(field.view().as_token_trees()));
let list = builder.build();
let quoted = quote! {DUMMY =>
impl Clone for #struct_name {
fn clone(&self) -> Self {
Self #list
}
}
};
assert_eq!(quoted.to_string(), "impl Clone for Foo {fn clone (& self) -> Self {Self {name : self . name . clone () , id : self . id . clone () ,}}}");
}
}