forked from lix-project/lix
Document ExprLambda fields
We got confused what formals did and had to briefly figure it out. We
should just have docs, so these are some.
Change-Id: If3e794a401e69d022785cbfa0b0c2e2284f41f58
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@ -243,6 +243,7 @@ struct Formal
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Expr * def;
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};
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/** Attribute set destructuring in arguments of a lambda, if present */
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struct Formals
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{
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typedef std::vector<Formal> Formals_;
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@ -270,9 +271,18 @@ struct Formals
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struct ExprLambda : Expr
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{
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/** Where the lambda is defined in Nix code. May be falsey if the
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* position is not known. */
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PosIdx pos;
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/** Name of the lambda. This is set if the lambda is defined in a
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* let-expression or an attribute set, such that there is a name.
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* Lambdas may have a falsey symbol as the name if they are anonymous */
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Symbol name;
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/** The argument name of this particular lambda. Is a falsey symbol if there
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* is no such argument. */
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Symbol arg;
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/** Formals are present when the lambda destructures an attr set as
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* argument, with or without ellipsis */
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Formals * formals;
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Expr * body;
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ExprLambda(PosIdx pos, Symbol arg, Formals * formals, Expr * body)
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