Document Automatically Defined Compiler Symbols in F# Compiler Directives #45607
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shethaadit
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T-Gro
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Hi @BillWagner, @T-Gro, could you please review? |
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I'm generally OK with this one. I'd like @T-Gro to take a look before I merge. |
T-Gro
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Apr 11, 2025
| | `TRACE` | Defined when tracing is enabled in the project settings. | | ||
| | `NULLABLE` | Defined when `<Nullable>enable</Nullable>` is set in the project file. | | ||
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| #### Target Framework Symbols |
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I am sorry for the misunderstanding.
Could those be instead solved by a link to the specific SDK documentation?
This is not being defined by F# and it does naturally evolve. If we keep a duplicate here, it would also require maintenace.
I think linking this very page https://learn.microsoft.com/en-us/dotnet/standard/frameworks#preprocessor-symbols would be best when it comes to completeness (see how many there are overall)
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@shethaadit Can you update based on @T-Gro 's comments? |
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PR Description:
This PR enhances the F# Compiler Directives documentation by adding a section on automatically defined symbols, such as
DEBUGandTRACE. These symbols are implicitly defined by the compiler in specific build configurations and can be used for conditional compilation.Changes Made:
DEBUG(enabled in Debug builds) andTRACE(enabled in tracing configurations).#if DEBUG.This update helps developers understand which symbols are pre-defined by the F# compiler and how to use them effectively.
Fixes #45478
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