Nullsafe Clang Playground

An experimental Clang fork with strict null checking

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Source Code

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Compiler Output

Nullsafe Clang ⓘThis Clang fork with flow-sensitive nullability analysis. Treats all unannotated pointers as nullable and warns on unchecked dereferences. Runs as part of the normal compile — fast enough for every build and supported in clangd/IDEs.

Standard Clang ⓘStock Clang with all nullability warnings disabled. This is what most C/C++ developers compile with today — no null safety checking at all.

Static Analyzer ⓘClang's built-in static analyzer (clang --analyze) with core.NullDereference and nullability checkers enabled. This is the tool people typically suggest for finding null bugs. It uses symbolic execution — slower and separate from the normal compile. It only catches nulls when pointers are explicitly compared to null or annotated _Nullable in the source.