[mristin]

In C++, C#, Java and Go, a negative list index known only at run time was not counted from the back as in Python, and C++ xs[-1] on an empty list was undefined behavior via .back(). We now route all list and JSON-array indices, literals included, through a per-target helper which resolves a negative index and throws when out of range so that the behavior in all targets is equal to that of Python:

• C++: common::At(xs, i),
• C#: Common.ListHelpers.At(xs, i) and SetAt(xs, i, v),
• Java: ListHelpers.at(xs, i) and ListHelpers.setAt(xs, i, v),
• Go: ourcommon.At(xs, i) and *ourcommon.PointerAt(xs, i) = v.

Go writes go through a pointer since Go can not infer T in SetAt[T]([]T, int64, T) for a *Class written into an []IClass. TypeScript OurCommon.at now throws a RangeError instead of returning undefined. The helpers are generated only if the meta-model indexes a list.

We test reads and writes at negative run-time indices in the common meta-model int_length_interplay.

[coveralls]

Coverage Report for CI Build 41426363218

Coverage decreased (-0.008%) to 90.341%

Details

• Coverage decreased (-0.008%) from the base build.
• Patch coverage: 11 uncovered changes across 3 files (102 of 113 lines covered, 90.27%).
• 3 coverage regressions across 2 files.

Uncovered Changes

File	Changed	Covered	%
aas_core_codegen/golang/transpilation.py	25	20	80.0%
aas_core_codegen/csharp/transpilation.py	29	26	89.66%
aas_core_codegen/java/transpilation.py	17	14	82.35%
Total (9 files)	113	102	90.27%

Coverage Regressions

3 previously-covered lines in 2 files lost coverage.

File	Lines Losing Coverage	Coverage
aas_core_codegen/java/transpilation.py	2	83.19%
aas_core_codegen/cpp/transpilation.py	1	82.45%

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Coverage Stats

Relevant Lines:	52056
Covered Lines:	47028
Line Coverage:	90.34%
Coverage Strength:	2.71 hits per line

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💛 - Coveralls