C26426: Global initializer calls a non-constexpr function 'xxx' -> Rationale: many false warnings. CharLS is a library, globals are correctly initialized.
C26429: Symbol 'xxx' is never tested for nullness, it can be marked as not_null (f.23). -> Rationale: Prefast attributes are better.
C26446: Prefer to use gsl::at() instead of unchecked subscript operator. -> Rationale: CharLS require good performance, gsl:at() cannot be used. debug STL already checks.
C26459: You called an STL function '' with a raw pointer parameter. Consider wrapping your range in a gsl::span and pass as a span iterator (stl.1) Rationale: gsl:span() cannot be used. Update to std:span when available (C++20).
C26472: Don't use static_cast for arithmetic conversions -> Rationale: can only be solved with gsl::narrow_cast
C26481: Do not pass an array as a single pointer. -> Rationale: gsl::span is not available.
C26482: Only index into arrays using constant expressions. -> Rationale: static analysis can verify access, std::array during runtime (debug)
C26490: Don't use reinterpret_cast -> Rationale: required to cast unsigned char* to char*.
C26494: Variable 'x' is uninitialized. Always initialize an object -> Rationale: many false warnings, other analyzers are better.