~/talk

C++ Modules

Talkat CppCon 2018 · 2018-09-23..09-28· [c-and-cpp, compilers-and-language-design]

speaker

name:Nathan Sidwell

links:none on file

resources

video:https://youtu.be/xi2lTaC5p0I

slides:none on file

summary

Implementation in GCC produces object files plus a binary module interface (BMI) and uses -fmodules-ts to read serialized interfaces; an experimental -fmodules-atom supports legacy header units and partitions that keep implementation private while exposing incomplete types. Global module pruning shrinks BMI bytes to kilobytes in practice. Build-order and dependency discovery become a real challenge (modules force ordered BMI generation), but Google/Clang experiments report roughly 2–4x compile-speed wins on the worst 10% of headers.

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