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-rw-r--r--compiler/rustc_ast/src/util/literal.rs32
1 files changed, 14 insertions, 18 deletions
diff --git a/compiler/rustc_ast/src/util/literal.rs b/compiler/rustc_ast/src/util/literal.rs
index 9c18f55c0..536b38560 100644
--- a/compiler/rustc_ast/src/util/literal.rs
+++ b/compiler/rustc_ast/src/util/literal.rs
@@ -9,7 +9,6 @@ use rustc_span::symbol::{kw, sym, Symbol};
use rustc_span::Span;
use std::ascii;
-use tracing::debug;
pub enum LitError {
NotLiteral,
@@ -23,7 +22,7 @@ pub enum LitError {
impl LitKind {
/// Converts literal token into a semantic literal.
- pub fn from_lit_token(lit: token::Lit) -> Result<LitKind, LitError> {
+ pub fn from_token_lit(lit: token::Lit) -> Result<LitKind, LitError> {
let token::Lit { kind, symbol, suffix } = lit;
if suffix.is_some() && !kind.may_have_suffix() {
return Err(LitError::InvalidSuffix);
@@ -146,14 +145,14 @@ impl LitKind {
LitKind::ByteStr(bytes.into())
}
- token::Err => LitKind::Err(symbol),
+ token::Err => LitKind::Err,
})
}
/// Attempts to recover a token from semantic literal.
/// This function is used when the original token doesn't exist (e.g. the literal is created
/// by an AST-based macro) or unavailable (e.g. from HIR pretty-printing).
- pub fn to_lit_token(&self) -> token::Lit {
+ pub fn to_token_lit(&self) -> token::Lit {
let (kind, symbol, suffix) = match *self {
LitKind::Str(symbol, ast::StrStyle::Cooked) => {
// Don't re-intern unless the escaped string is different.
@@ -164,12 +163,7 @@ impl LitKind {
}
LitKind::Str(symbol, ast::StrStyle::Raw(n)) => (token::StrRaw(n), symbol, None),
LitKind::ByteStr(ref bytes) => {
- let string = bytes
- .iter()
- .cloned()
- .flat_map(ascii::escape_default)
- .map(Into::<char>::into)
- .collect::<String>();
+ let string = bytes.escape_ascii().to_string();
(token::ByteStr, Symbol::intern(&string), None)
}
LitKind::Byte(byte) => {
@@ -199,7 +193,9 @@ impl LitKind {
let symbol = if value { kw::True } else { kw::False };
(token::Bool, symbol, None)
}
- LitKind::Err(symbol) => (token::Err, symbol, None),
+ // This only shows up in places like `-Zunpretty=hir` output, so we
+ // don't bother to produce something useful.
+ LitKind::Err => (token::Err, Symbol::intern("<bad-literal>"), None),
};
token::Lit::new(kind, symbol, suffix)
@@ -208,8 +204,8 @@ impl LitKind {
impl Lit {
/// Converts literal token into an AST literal.
- pub fn from_lit_token(token: token::Lit, span: Span) -> Result<Lit, LitError> {
- Ok(Lit { token, kind: LitKind::from_lit_token(token)?, span })
+ pub fn from_token_lit(token_lit: token::Lit, span: Span) -> Result<Lit, LitError> {
+ Ok(Lit { token_lit, kind: LitKind::from_token_lit(token_lit)?, span })
}
/// Converts arbitrary token into an AST literal.
@@ -232,21 +228,21 @@ impl Lit {
_ => return Err(LitError::NotLiteral),
};
- Lit::from_lit_token(lit, token.span)
+ Lit::from_token_lit(lit, token.span)
}
/// Attempts to recover an AST literal from semantic literal.
/// This function is used when the original token doesn't exist (e.g. the literal is created
/// by an AST-based macro) or unavailable (e.g. from HIR pretty-printing).
pub fn from_lit_kind(kind: LitKind, span: Span) -> Lit {
- Lit { token: kind.to_lit_token(), kind, span }
+ Lit { token_lit: kind.to_token_lit(), kind, span }
}
/// Losslessly convert an AST literal into a token.
pub fn to_token(&self) -> Token {
- let kind = match self.token.kind {
- token::Bool => token::Ident(self.token.symbol, false),
- _ => token::Literal(self.token),
+ let kind = match self.token_lit.kind {
+ token::Bool => token::Ident(self.token_lit.symbol, false),
+ _ => token::Literal(self.token_lit),
};
Token::new(kind, self.span)
}