Transforms level 1 splices into holes. To do so it transforms the contents of the splice into a lambda that receives all cross-quote references.
Cross-quote reference is a reference to a definition that is not defined in the current quote. Those references appear in quotes that are nested in a splice.
After this phase we have the invariant where all splices have the following shape
{{{ <holeIdx> | <holeType> | <captures>* | (<capturedTerms>*) => <spliceContent>
}}}
where <spliceContent>
does not contain any free references to quoted definitions and <captures>*
contains the quotes with references to all cross-quote references. There are some special rules
for references in the LHS of assignments and cross-quote method references.
In the following code example x1
and x2
are cross-quote references.
'{ ...
val x1: T1 = ???
val x2: T2 = ???
${ (q: Quotes) ?=> f('{ g(x1, x2) }) }: T3
}
This phase identifies cross-quote references such as x1
and replaces it with an ${x1$}
.
All cross-quote arguments are directly applied in the lambda.
'{ ...
val x1: T1 = ???
val x2: T2 = ???
{{{
0 | T3 | x1, x2 |
(x1$: Expr[T1], x2$: Expr[T2]) => // body of this lambda does not contain references to x1 or x2
(q: Quotes) ?=> f('{ g(${x1$}, ${x2$}) })
}}}
}
and then performs the same transformation on '{ g(${x1$}, ${x2$}) }
.
- Companion:
- object
Type members
Inherited classlikes
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, allow missing or superfluous arguments in applications and type applications.
If set, allow missing or superfluous arguments in applications and type applications.
- Inherited from:
- Phase
List of names of phases that should precede this phase
List of names of phases that should precede this phase
- Inherited from:
- Phase
The phase in which the transformation should be run. By default this is the phase given by the this macro transformer, but it could be overridden to be the phase following that one.
The phase in which the transformation should be run. By default this is the phase given by the this macro transformer, but it could be overridden to be the phase following that one.
- Inherited from:
- MacroTransform