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[flang][doc] refine zero initialization extension documentation #121956

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Jan 8, 2025
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[flang][doc] refine zero initialization extension documentation #121956

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[flang][doc] refine zero initialization extension
jeanPerier Jan 7, 2025
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update text
jeanPerier Jan 7, 2025
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6 changes: 5 additions & 1 deletion flang/docs/Extensions.md
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Expand Up @@ -160,7 +160,11 @@ end
* `<>` as synonym for `.NE.` and `/=`
* `$` and `@` as legal characters in names
* Initialization in type declaration statements using `/values/`
* Saved variables without explicit or default initializers are zero initialized.
* Saved variables without explicit or default initializers are zero initialized,
except for scalar variables from the main program that are not explicitly
initialized or marked with an explicit SAVE attribute (these variables may be
placed on the stack by flang and not zero initialized). It is not advised to
rely on this extension in new code.
* In a saved entity of a type with a default initializer, components without default
values are zero initialized.
* Kind specification with `*`, e.g. `REAL*4`
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