Ian Bell 6cb4dc12f6 Remove unused heavy headers to improve compile times (#2689) ...

* Remove unused heavy headers to improve compile times

- Exceptions.h: replace unused <iostream> with <string> (needed for std::string)
- CPnumerics.h: add explicit <iostream> (was relying on transitive include via Exceptions.h for std::cerr)
- superancillary/superancillary.h: replace <iostream> with <cstdio>; use fprintf for debug output
- TabularBackends.h: remove unused <sstream>

<iostream> is one of the heaviest stdlib headers; removing it from widely-included
headers (Exceptions.h: ~32 dependents, superancillary.h: pulled in by AbstractState.h,
CoolPropFluid.h, Configuration.h) reduces cold build times.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Add missing <iostream> to ODEIntegrators.cpp

ODEIntegrators.cpp uses std::cout but was relying on transitive inclusion
via Exceptions.h. After removing <iostream> from Exceptions.h, this broke
compilation. Add the include directly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-03-22 11:14:53 -04:00

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