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Document about noinline calling convention and exportcpp pragma in Nim manual #24323

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Oct 18, 2024
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Document about noinline calling convention and exportcpp pragma in Nim manual #24323

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Add document about noinline and exportcpp
demotomohiro Oct 17, 2024
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Araq Oct 18, 2024
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12 changes: 12 additions & 0 deletions doc/manual.md
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Expand Up @@ -2241,6 +2241,10 @@ Nim supports these `calling conventions`:idx:\:
only a hint for the compiler: it may completely ignore it, and
it may inline procedures that are not marked as `inline`.

`noinline`:idx:
: The backend compiler may inline procedures that are not marked as `inline`.
The noinline convention prevents it.

`fastcall`:idx:
: Fastcall means different things to different C compilers. One gets whatever
the C `__fastcall` means.
Expand Down Expand Up @@ -8646,6 +8650,14 @@ pragma should be used in addition to the `exportc` pragma. See
[Dynlib pragma for export].


Exportcpp pragma
----------------
The `exportcpp` pragma works like the `exportc` pragma but it requires the `cpp` backend.
When compiled with the `cpp` backend, the `exportc` pragma adds `export "C"` to
the declaration in the generated code so that it can be called from both C and
C++ code. `exportcpp` pragma doesn't add `export "C"`.


Extern pragma
-------------
Like `exportc` or `importc`, the `extern` pragma affects name
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