The Spark transformer that runs the checks that give only errors
It runs one time for each deck module at compile time, after the other
transformers. It calls verify/1 of each module of checks/0, and an error
stops the compile. More than one error gives one Spark.Error.DslError with
the message of each error.
The checks change nothing. They run in a transformer and not as verifiers,
because Spark raises an error from a transformer, and the compile stops.
Spark runs a verifier in an @after_verify callback, and it reports the
error of a verifier as a warning. Expresso.PlacementTransformer gives the
same reason. The checks that give only warnings stay verifiers of
Expresso.Extension.
Summary
Functions
Run this transformer after each other transformer
Callback implementation for Spark.Dsl.Transformer.after_compile?/0.
Callback implementation for Spark.Dsl.Transformer.before?/1.
Return the modules of the checks that this transformer runs
Run each check on the state of the DSL, and return an error for each error of a check
Functions
Run this transformer after each other transformer
The checks read the steps and the names of the style sheet, which the other transformers write.
Callback implementation for Spark.Dsl.Transformer.after_compile?/0.
Callback implementation for Spark.Dsl.Transformer.before?/1.
@spec checks() :: [module()]
Return the modules of the checks that this transformer runs
iex> Expresso.Overlay.EffectVerifier in Expresso.VerifierTransformer.checks()
true@spec transform(map()) :: {:ok, map()} | {:error, Spark.Error.DslError.t()}
Run each check on the state of the DSL, and return an error for each error of a check