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Add cfg(true) and cfg(false) to conditional compilation (RFC 3695) #1762

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Merged
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Apr 18, 2025
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Add cfg(true) and cfg(false) to conditional compilation (RFC 3695) #1762

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5 changes: 5 additions & 0 deletions src/conditional-compilation.md
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,8 @@ ConfigurationPredicate ->
| ConfigurationAll
| ConfigurationAny
| ConfigurationNot
| `true`
| `false`

ConfigurationOption ->
IDENTIFIER ( `=` ( STRING_LITERAL | RAW_STRING_LITERAL ) )?
Expand Down Expand Up @@ -50,6 +52,9 @@ r[cfg.predicate.any]
r[cfg.predicate.not]
* `not()` with a configuration predicate. It is true if its predicate is false and false if its predicate is true.

r[cfg.predicate.literal]
* `true` or `false` literals, which are always true or false respectively.

r[cfg.option-spec]
_Configuration options_ are either names or key-value pairs, and are either set or unset.

Expand Down