eclipse-aascw / aas-core-codegen / 39677161356

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Transpile string concatenation (#861)

We transpile the addition of two strings, ``left + right``, to
the native concatenation in all the targets. The type inference refuses
to mix a string with another type, as the targets convert the other
operand to a string differently, or not at all.

C++ can not add two string literals, as they are pointers, so we
convert the left one:

    std::wstring extension = std::wstring(L".") + L"txt";

Along the way, we drop the redundant parentheses around a compound
argument of ``OurCommon.lenStr`` in TypeScript.

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