* Memoize strict evaluation.
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5011588459
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05879db628
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@ -672,7 +672,10 @@ Expr evalFile(EvalState & state, const Path & path)
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}
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Expr strictEvalExpr(EvalState & state, Expr e, bool canonicalise)
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static Expr strictEvalExpr(EvalState & state, Expr e, ATermMap & nfs);
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static Expr strictEvalExpr_(EvalState & state, Expr e, ATermMap & nfs)
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{
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e = evalExpr(state, e);
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@ -682,13 +685,8 @@ Expr strictEvalExpr(EvalState & state, Expr e, bool canonicalise)
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for (ATermIterator i(as); i; ++i) {
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ATerm name; Expr e; ATerm pos;
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if (!matchBind(*i, name, e, pos)) abort(); /* can't happen */
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as2 = ATinsert(as2, makeBind(name, strictEvalExpr(state, e, canonicalise),
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canonicalise ? makeNoPos() : pos));
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as2 = ATinsert(as2, makeBind(name, strictEvalExpr(state, e, nfs), pos));
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}
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if (canonicalise) {
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}
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/* !!! sort attributes if canonicalise == true */
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return makeAttrs(ATreverse(as2));
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}
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@ -696,7 +694,7 @@ Expr strictEvalExpr(EvalState & state, Expr e, bool canonicalise)
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if (matchList(e, es)) {
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ATermList es2 = ATempty;
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for (ATermIterator i(es); i; ++i)
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es2 = ATinsert(es2, strictEvalExpr(state, *i, canonicalise));
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es2 = ATinsert(es2, strictEvalExpr(state, *i, nfs));
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return makeList(ATreverse(es2));
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}
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@ -713,21 +711,40 @@ Expr strictEvalExpr(EvalState & state, Expr e, bool canonicalise)
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if (matchValidValues(valids, valids2)) {
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ATermList valids3 = ATempty;
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for (ATermIterator j(valids2); j; ++j)
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valids3 = ATinsert(valids3, strictEvalExpr(state, *j, canonicalise));
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valids3 = ATinsert(valids3, strictEvalExpr(state, *j, nfs));
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valids = makeValidValues(ATreverse(valids3));
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}
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formals2 = ATinsert(formals2, makeFormal(name, valids, dummy));
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}
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return makeFunction(ATreverse(formals2), body,
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canonicalise ? makeNoPos() : pos);
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return makeFunction(ATreverse(formals2), body, pos);
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}
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return e;
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}
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static Expr strictEvalExpr(EvalState & state, Expr e, ATermMap & nfs)
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{
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Expr nf = nfs.get(e);
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if (nf) return nf;
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nf = strictEvalExpr_(state, e, nfs);
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nfs.set(e, nf);
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return nf;
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}
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Expr strictEvalExpr(EvalState & state, Expr e)
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{
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ATermMap strictNormalForms;
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return strictEvalExpr(state, e, strictNormalForms);
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}
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/* Yes, this is a really bad idea... */
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extern "C" {
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unsigned long AT_calcAllocatedSize();
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@ -56,8 +56,7 @@ Expr evalFile(EvalState & state, const Path & path);
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attributes. If `canonicalise' is true, we remove things like
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position information and make sure that attribute sets are in
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sorded order. */
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Expr strictEvalExpr(EvalState & state, Expr e,
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bool canonicalise = false);
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Expr strictEvalExpr(EvalState & state, Expr e);
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/* Specific results. */
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string evalString(EvalState & state, Expr e, PathSet & context);
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