The phase defined by this transform
A standard phase template
The global environment; overridden by instantiation in Global.
The global environment; overridden by instantiation in Global.
The transformer factory
The transformer factory
The name of the phase
The name of the phase
List of phase names, this phase should run after
List of phase names, this phase should run after
Phase name this phase will attach itself to, not allowing any phase to come between it and the phase name declared
Phase name this phase will attach itself to, not allowing any phase to come between it and the phase name declared
SubComponent are added to a HashSet and two phases are the same if they have the same name
SubComponent are added to a HashSet and two phases are the same if they have the same name
Internal flag to tell external from internal phases
Internal flag to tell external from internal phases
Create a new phase which applies transformer
Create a new phase which applies transformer
The phase corresponding to this subcomponent in the current compiler run
The phase corresponding to this subcomponent in the current compiler run
New flags defined by the phase which are not valid before
New flags defined by the phase which are not valid before
New flags defined by the phase which are not valid until immediately after it
New flags defined by the phase which are not valid until immediately after it
List of phase names, this phase should run before
List of phase names, this phase should run before
(infoTransform: StringAdd).self
(infoTransform: StringFormat).self
(infoTransform: ArrowAssoc[InfoTransform]).x
(Since version 2.10.0) Use leftOfArrow instead
(infoTransform: Ensuring[InfoTransform]).x
(Since version 2.10.0) Use resultOfEnsuring instead
An InfoTransform contains a compiler phase that transforms trees and symbol infos -- making sure they stay consistent. The symbol info is transformed assuming it is consistent right before this phase. The info transformation is triggered by Symbol::rawInfo, which caches the results in the symbol's type history. This way sym.info (during an atPhase(p)) can look up what the symbol's info should look like at the beginning of phase p. (If the transformed info had not been stored yet, rawInfo will compute the info by composing the info-transformers of the most recent phase before p, up to the transformer of the phase right before p.)
Concretely, atPhase(p) { sym.info } yields the info *before* phase p has transformed it. Imagine you're a phase and it all makes sense.