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* Let syntax.

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This commit is contained in:
Eelco Dolstra 2003-11-01 19:10:41 +00:00
parent a2a9bacd82
commit 1b4184ccbb
2 changed files with 14 additions and 0 deletions
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5
src/fix-ng/eval.cc
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@ -160,6 +160,11 @@ Expr evalExpr2(EvalState & state, Expr e)
if (ATmatch(e, "Rec([<list>])", &bnds))
return expandRec(e, (ATermList) bnds);
/* Let expressions `let {..., body = ...}' are just desugared
into `(rec {..., body = ...}).body'. */
if (ATmatch(e, "LetRec(<term>)", &e1))
return evalExpr(state, ATmake("Select(Rec(<term>), \"body\")", e1));
/* Barf. */
throw badTerm("invalid expression", e);
}