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Auto merge of #58458 - nnethercote:tweak-Span-encoding, r=petrochenkov
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Tweak `Span` encoding.

Failing to fit `base` is more common than failing to fit `len`.
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bors committed Apr 3, 2019
2 parents 546cb21 + ff94fea commit 0ba7d41
Showing 1 changed file with 3 additions and 3 deletions.
6 changes: 3 additions & 3 deletions src/libsyntax_pos/span_encoding.rs
Original file line number Diff line number Diff line change
Expand Up @@ -74,12 +74,12 @@ const CTXT_INDEX: usize = 2;

// Tag = 0, inline format.
// -------------------------------------------------------------
// | base 31:8 | len 7:1 | ctxt (currently 0 bits) | tag 0:0 |
// | base 31:7 | len 6:1 | ctxt (currently 0 bits) | tag 0:0 |
// -------------------------------------------------------------
// Since there are zero bits for ctxt, only SpanData with a 0 SyntaxContext
// can be inline.
const INLINE_SIZES: [u32; 3] = [24, 7, 0];
const INLINE_OFFSETS: [u32; 3] = [8, 1, 1];
const INLINE_SIZES: [u32; 3] = [25, 6, 0];
const INLINE_OFFSETS: [u32; 3] = [7, 1, 1];

// Tag = 1, interned format.
// ------------------------
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