Profiles

A "profile" is a set of deterministic and portably enforceable subset rules (i.e., restrictions) that are designed to achieve a specific guarantee. "Deterministic" means they require only local analysis and could be implemented in a compiler (though they don't need to be). "Portably enforceable" means they are like language rules, so programmers can count on enforcement tools giving the same answer for the same code.

Code written to be warning-free using such a language profile is considered to conform to the profile. Conforming code is considered to be safe by construction with regard to the safety properties targeted by that profile. Conforming code will not be the root cause of errors for that property, although such errors may be introduced into a program by other code, libraries or the external environment. A profile may also introduce additional library types to ease conformance and encourage correct code.

Profiles summary:

• Pro.type: Type safety
• Pro.bounds: Bounds safety
• Pro.lifetime: Lifetime safety