forked from lix-project/lix
add doc comment justifying ExprInheritFrom
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
(cherry picked from commit f24e445bc024cfd3c26be5f061280af549321c22)
Change-Id: I7acda5d5c34c0914a78adc2385d32782c4c275cd
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@ -129,6 +129,11 @@ struct ExprVar : Expr
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COMMON_METHODS
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};
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/**
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* A pseudo-expression for the purpose of evaluating the `from` expression in `inherit (from)` syntax.
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* Unlike normal variable references, the displacement is set during parsing, and always refers to
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* `ExprAttrs::inheritFromExprs` (by itself or in `ExprLet`), whose values are put into their own `Env`.
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*/
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struct ExprInheritFrom : ExprVar
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{
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ExprInheritFrom(PosIdx pos, Displacement displ): ExprVar(pos, {})
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