SequenceRuntimeValuedPropertiesMixin
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package dsom
Insures at compile time if the separator and terminator are both statically known, that they are not the same.
Insures at compile time if the separator and terminator are both statically known, that they are not the same.
If there is a possible terminator that could be after this, or enclosing group separator, that could be after this, then it has to not be ambiguous with this sequence's separator.
Note that checking, in general, for whether two delimiter DFA things can accept the same string, or one can accept a prefix of something the other accepts, is generally hard, and even if someone creates things with some ambiguity of that sort, real data might not ever run into that ambiguity. So spurious warnings are a possible outcome.
DFDL specifically does not check for, nor require detection of this sort of ambiguity at runtime or at compile time. But when it's completely obvious at compile time it's sensible to give an error.
TODO: An improvement - the enclosing sequence object should really be passing a list of possible terminating markup down to each sequence child object. Those that aren't runtime-valued exprsesions could be checked for ambiguity.
For now, we just check if this sequence itself has a constant separator and terminator that are the same. That is, we're checking for an obvious kind of cut/paste error by the schema author.
Use when we might or might not need the outputNewLine property
Use when we might or might not need the outputNewLine property
Convenience method to make gathering up all elements referenced in expressions easier.
Convenience method to make gathering up all elements referenced in expressions easier.