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Reject unsafe deep pointer qualification conversions - #455

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71iq wants to merge 3 commits into
edgcpp:mainfrom
71iq:fix/edg-28967-deep-pointer-qualification
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71iq wants to merge 3 commits into
edgcpp:mainfrom
71iq:fix/edg-28967-deep-pointer-qualification

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@71iq

@71iq 71iq commented Nov 1, 2026

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GNU C++ mode currently accepts deep pointer qualification conversions with a warning. Exclude GNU mode from that extension so unsafe conversions are rejected.

Related discussion: #297
Previously accepted by Mike Herrick as issue EDGcpfe/28967.

Adds invalid two- and three-level conversions and valid conversions with the required intermediate const qualifiers. GCC 13 rejects the negative cases and accepts the positive cases.

EDG build, regression testing, and test recordings are pending because the Docker development environment is unavailable. This PR is a draft until those checks are completed.

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AcknowlEDG review results updated for 1aa33fa2edc6:

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