Rewrite (x1, ... xN) => f(x1, ... xN) for N >= 0 to f,
provided f is a pure path of function type.
This optimization is crucial for context functions. The compiler produces a contextual closure around values passed as arguments where a context function is expected, unless that value has the syntactic form of a context function literal.
Also handle variants of eta-expansions where
- result f.apply(X_1,...,X_n) is subject to a synthetic cast, or
- the application uses a specialized apply method, or
- the closure is adapted (see Erasure#adaptClosure)
Without this phase, when a contextual function is passed as an argument to a recursive function, that would have the unfortunate effect of a linear growth in transient thunks of identical type wrapped around each other, leading to performance degradation, and in some cases, stack overflows.
- Companion:
- object
Value members
Concrete methods
A name given to the Phase that can be used to debug the compiler. For
instance, it is possible to print trees after a given phase using:
A name given to the Phase that can be used to debug the compiler. For
instance, it is possible to print trees after a given phase using:
$ ./bin/scalac -Xprint:<phaseNameHere> sourceFile.scala
- Definition Classes
Inherited methods
Can this transform change the base types of a type?
Can this transform change the base types of a type?
- Inherited from:
- Phase
Can this transform create or delete non-private members?
Can this transform create or delete non-private members?
- Inherited from:
- Phase
Can this transform change the parents of a class?
Can this transform change the parents of a class?
- Inherited from:
- Phase
Check what the phase achieves, to be called at any point after it is finished.
Check what the phase achieves, to be called at any point after it is finished.
- Inherited from:
- Phase
The sequence position of this phase in the given context where 0 is reserved for NoPhase and the first real phase is at position 1. -1 if the phase is not installed in the context.
The sequence position of this phase in the given context where 0 is reserved for NoPhase and the first real phase is at position 1. -1 if the phase is not installed in the context.
- Inherited from:
- Phase
Output should be checkable by TreeChecker
Output should be checkable by TreeChecker
- Inherited from:
- Phase
Is this phase the standard typerphase? True for TyperPhase, but not for other first phases (such as FromTasty or Parser). The predicate is tested in some places that perform checks and corrections. It's different from ctx.isAfterTyper (and cheaper to test).
Is this phase the standard typerphase? True for TyperPhase, but not for other first phases (such as FromTasty or Parser). The predicate is tested in some places that perform checks and corrections. It's different from ctx.isAfterTyper (and cheaper to test).
- Inherited from:
- Phase
If set, use relaxed typing for all phases in group
If set, use relaxed typing for all phases in group
- Inherited from:
- MiniPhase
List of names of phases that should precede this phase
List of names of phases that should precede this phase
- Inherited from:
- Phase
List of names of phases that should have finished their processing of all compilation units before this phase starts
List of names of phases that should have finished their processing of all compilation units before this phase starts
- Inherited from:
- MiniPhase
Transform tree using all transforms of current group (including this one)
Transform tree using all transforms of current group (including this one)
- Inherited from:
- MiniPhase
Transform single node using all transforms following the current one in this group
Transform single node using all transforms following the current one in this group
- Inherited from:
- MiniPhase
Transform tree using all transforms following the current one in this group
Transform tree using all transforms following the current one in this group
- Inherited from:
- MiniPhase