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Auto merge of #110497 - cjgillot:span-ctxt, r=b-naber

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Refactor `SyntaxContext::ctxt` logic.

I'm still trying to make a test from the issue.

cc `@deepink-mas` does this solve the issue?

Fixes https://github.com/rust-lang/rust/issues/110230
This commit is contained in:
bors 2023-04-23 09:13:33 +00:00
commit f12a7fa00f
1 changed files with 14 additions and 10 deletions
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24
compiler/rustc_span/src/span_encoding.rs
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@ -181,19 +181,23 @@ impl Span {
#[inline] #[inline]
pub fn ctxt(self) -> SyntaxContext { pub fn ctxt(self) -> SyntaxContext {
let ctxt_or_tag = self.ctxt_or_tag as u32; let ctxt_or_tag = self.ctxt_or_tag as u32;
if ctxt_or_tag <= MAX_CTXT { // Check for interned format.
if self.len_or_tag == LEN_TAG || self.len_or_tag & PARENT_MASK == 0 { if self.len_or_tag == LEN_TAG {
// Inline format or interned format with inline ctxt. if ctxt_or_tag == CTXT_TAG {
SyntaxContext::from_u32(ctxt_or_tag) // Fully interned format.
let index = self.base_or_index;
with_span_interner(|interner| interner.spans[index as usize].ctxt)
} else { } else {
// Inline format or interned format with inline parent. // Interned format with inline ctxt.
// We know that the SyntaxContext is root. SyntaxContext::from_u32(ctxt_or_tag)
SyntaxContext::root()
} }
} else if self.len_or_tag & PARENT_MASK == 0 {
// Inline format with inline ctxt.
SyntaxContext::from_u32(ctxt_or_tag)
} else { } else {
// Interned format. // Inline format with inline parent.
let index = self.base_or_index; // We know that the SyntaxContext is root.
with_span_interner(|interner| interner.spans[index as usize].ctxt) SyntaxContext::root()
} }
} }
} }