mirror of
https://github.com/rust-lang/rust.git
synced 2025-05-01 04:27:38 +00:00
2620eb42d7
`rustc_span::symbol` defines some things that are re-exported from
`rustc_span`, such as `Symbol` and `sym`. But it doesn't re-export some
closely related things such as `Ident` and `kw`. So you can do `use
rustc_span::{Symbol, sym}` but you have to do `use
rustc_span::symbol::{Ident, kw}`, which is inconsistent for no good
reason.
This commit re-exports `Ident`, `kw`, and `MacroRulesNormalizedIdent`,
and changes many `rustc_span::symbol::` qualifiers in `compiler/` to
`rustc_span::`. This is a 200+ net line of code reduction, mostly
because many files with two `use rustc_span` items can be reduced to
one.
87 lines
3.4 KiB
Rust
87 lines
3.4 KiB
Rust
use rustc_ast::tokenstream::TokenStream;
|
|
use rustc_ast::{ExprKind, LitKind, UnOp};
|
|
use rustc_expand::base::{DummyResult, ExpandResult, ExtCtxt, MacEager, MacroExpanderResult};
|
|
use rustc_session::errors::report_lit_error;
|
|
use rustc_span::Symbol;
|
|
|
|
use crate::errors;
|
|
use crate::util::get_exprs_from_tts;
|
|
|
|
pub(crate) fn expand_concat(
|
|
cx: &mut ExtCtxt<'_>,
|
|
sp: rustc_span::Span,
|
|
tts: TokenStream,
|
|
) -> MacroExpanderResult<'static> {
|
|
let ExpandResult::Ready(mac) = get_exprs_from_tts(cx, tts) else {
|
|
return ExpandResult::Retry(());
|
|
};
|
|
let es = match mac {
|
|
Ok(es) => es,
|
|
Err(guar) => return ExpandResult::Ready(DummyResult::any(sp, guar)),
|
|
};
|
|
let mut accumulator = String::new();
|
|
let mut missing_literal = vec![];
|
|
let mut guar = None;
|
|
for e in es {
|
|
match e.kind {
|
|
ExprKind::Lit(token_lit) => match LitKind::from_token_lit(token_lit) {
|
|
Ok(LitKind::Str(s, _) | LitKind::Float(s, _)) => {
|
|
accumulator.push_str(s.as_str());
|
|
}
|
|
Ok(LitKind::Char(c)) => {
|
|
accumulator.push(c);
|
|
}
|
|
Ok(LitKind::Int(i, _)) => {
|
|
accumulator.push_str(&i.to_string());
|
|
}
|
|
Ok(LitKind::Bool(b)) => {
|
|
accumulator.push_str(&b.to_string());
|
|
}
|
|
Ok(LitKind::CStr(..)) => {
|
|
guar = Some(cx.dcx().emit_err(errors::ConcatCStrLit { span: e.span }));
|
|
}
|
|
Ok(LitKind::Byte(..) | LitKind::ByteStr(..)) => {
|
|
guar = Some(cx.dcx().emit_err(errors::ConcatBytestr { span: e.span }));
|
|
}
|
|
Ok(LitKind::Err(guarantee)) => {
|
|
guar = Some(guarantee);
|
|
}
|
|
Err(err) => {
|
|
guar = Some(report_lit_error(&cx.sess.psess, err, token_lit, e.span));
|
|
}
|
|
},
|
|
// We also want to allow negative numeric literals.
|
|
ExprKind::Unary(UnOp::Neg, ref expr) if let ExprKind::Lit(token_lit) = expr.kind => {
|
|
match LitKind::from_token_lit(token_lit) {
|
|
Ok(LitKind::Int(i, _)) => accumulator.push_str(&format!("-{i}")),
|
|
Ok(LitKind::Float(f, _)) => accumulator.push_str(&format!("-{f}")),
|
|
Err(err) => {
|
|
guar = Some(report_lit_error(&cx.sess.psess, err, token_lit, e.span));
|
|
}
|
|
_ => missing_literal.push(e.span),
|
|
}
|
|
}
|
|
ExprKind::IncludedBytes(..) => {
|
|
cx.dcx().emit_err(errors::ConcatBytestr { span: e.span });
|
|
}
|
|
ExprKind::Err(guarantee) => {
|
|
guar = Some(guarantee);
|
|
}
|
|
ExprKind::Dummy => cx.dcx().span_bug(e.span, "concatenating `ExprKind::Dummy`"),
|
|
_ => {
|
|
missing_literal.push(e.span);
|
|
}
|
|
}
|
|
}
|
|
|
|
ExpandResult::Ready(if !missing_literal.is_empty() {
|
|
let guar = cx.dcx().emit_err(errors::ConcatMissingLiteral { spans: missing_literal });
|
|
DummyResult::any(sp, guar)
|
|
} else if let Some(guar) = guar {
|
|
DummyResult::any(sp, guar)
|
|
} else {
|
|
let sp = cx.with_def_site_ctxt(sp);
|
|
MacEager::expr(cx.expr_str(sp, Symbol::intern(&accumulator)))
|
|
})
|
|
}
|