diff options
Diffstat (limited to 'src/dotty/tools/dotc/core/tasty/TastyFormat.scala')
| -rw-r--r-- | src/dotty/tools/dotc/core/tasty/TastyFormat.scala | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/src/dotty/tools/dotc/core/tasty/TastyFormat.scala b/src/dotty/tools/dotc/core/tasty/TastyFormat.scala index e9de68e7f..8e8d58b47 100644 --- a/src/dotty/tools/dotc/core/tasty/TastyFormat.scala +++ b/src/dotty/tools/dotc/core/tasty/TastyFormat.scala @@ -185,21 +185,16 @@ Note: Tree tags are grouped into 5 categories that determine what follows, and t Category 4 (tags 112-127): tag Nat AST Category 5 (tags 128-255): tag Length <payload> -Standard Section: "Positions" sourceLength_Nat Assoc* - - Assoc = addr_Delta offset_Delta offset_Delta? - // addr_Delta : - // Difference of address to last recorded node. - // All but the first addr_Deltas are > 0, the first is >= 0. - // 2nd offset_Delta: - // Difference of end offset of addressed node vs parent node. Always <= 0 - // 1st offset Delta, if delta >= 0 or 2nd offset delta exists - // Difference of start offset of addressed node vs parent node. - // 1st offset Delta, if delta < 0 and 2nd offset delta does not exist: - // Difference of end offset of addressed node vs parent node. - // Offsets and addresses are difference encoded. +Standard Section: "Positions" Assoc* + + Assoc = Header offset_Delta? offset_Delta? + Header = addr_Delta + // in one Nat: difference of address to last recorded node << 2 + + hasStartDiff + // one bit indicating whether there follows a start address delta << 1 + hasEndDiff // one bit indicating whether there follows an end address delta // Nodes which have the same positions as their parents are omitted. - Delta = Int // Difference between consecutive offsets / tree addresses, + // offset_Deltas give difference of start/end offset wrt to the + // same offset in the previously recorded node (or 0 for the first recorded node) + Delta = Int // Difference between consecutive offsets, **************************************************************************************/ |