https://issues.dlang.org/show_bug.cgi?id=19495
Issue ID: 19495
Summary: Lack of version conjunctions
Product: D
Version: D2
Hardware: x86
OS: Mac OS X
Status: NEW
Severity: enhancement
Priority: P1
Component: dmd
Assignee: [email protected]
Reporter: [email protected]
version() blocks often require combinations of version identifiers, including
union, intersection, negation, else if, and else structures. However, D
currently does not allow version expressions to be combined this way. When a
programmer wants to write
version(A) {
...
} version(B) {
...
} version(C || D) {
...
} else {
...
}
D instead generates a compiler error, or unintended runtime behavior, or even
different behavior based on the current host environment. I think it is
reasonable to assume that programmers want to combine version identifiers much
like if/else if/else structures, and we should offer this capability to our
users.
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