A method or constructor with one or more parameters whose declaration is annotated with the @CompileTimeConstant
type annotation must only be invoked with corresponding actual parameters that are computed as compile-time constant expressions, specifically expressions that:
@CompileTimeConstant
annotation, orString
s, orFor example, the following are valid compile-time constants:
"some literal string"
"literal string" + compileTimeConstantParameter
debug ? compileTimeConstantParameter : "foo"
ImmutableList.of("a", "b", "c")
When applied to fields, this check enforces that the field is final
and has an initializer which satisfies the above conditions.
Getting Java 8 references to methods with @CompileTimeConstant
parameters is disallowed because we couldn't check if the method reference is later applied to a compile-time constant. Use the methods directly instead.
For the same reason, it's also disallowed to create lambda expressions with @CompileTimeConstant
parameters.