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* Refactoring: move strictEval to libexpr.

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This commit is contained in:
Eelco Dolstra 2006-08-24 13:39:22 +00:00
parent f41297fdce
commit 943ab38a0d
3 changed files with 48 additions and 44 deletions
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43
src/libexpr/eval.cc
View file

@ -584,6 +584,49 @@ Expr evalFile(EvalState & state, const Path & path)
} }
Expr strictEvalExpr(EvalState & state, Expr e)
{
e = evalExpr(state, e);
ATermList as;
if (matchAttrs(e, as)) {
ATermList as2 = ATempty;
for (ATermIterator i(as); i; ++i) {
ATerm name; Expr e; ATerm pos;
if (!matchBind(*i, name, e, pos)) abort(); /* can't happen */
as2 = ATinsert(as2, makeBind(name, strictEvalExpr(state, e), pos));
}
return makeAttrs(ATreverse(as2));
}
ATermList formals;
ATerm body, pos;
if (matchFunction(e, formals, body, pos)) {
ATermList formals2 = ATempty;
for (ATermIterator i(formals); i; ++i) {
Expr name; ValidValues valids; ATerm dummy;
if (!matchFormal(*i, name, valids, dummy)) abort();
ATermList valids2;
if (matchValidValues(valids, valids2)) {
ATermList valids3 = ATempty;
for (ATermIterator j(valids2); j; ++j)
valids3 = ATinsert(valids3, strictEvalExpr(state, *j));
valids = makeValidValues(ATreverse(valids3));
}
formals2 = ATinsert(formals2, makeFormal(name, valids, dummy));
}
return makeFunction(ATreverse(formals2), body, pos);
}
return e;
}
/* Yes, this is a really bad idea... */ /* Yes, this is a really bad idea... */
extern "C" { extern "C" {
unsigned long AT_calcAllocatedSize(); unsigned long AT_calcAllocatedSize();

4
src/libexpr/eval.hh
View file

@ -47,6 +47,10 @@ Expr evalExpr(EvalState & state, Expr e);
/* Evaluate an expression read from the given file to normal form. */ /* Evaluate an expression read from the given file to normal form. */
Expr evalFile(EvalState & state, const Path & path); Expr evalFile(EvalState & state, const Path & path);
/* Evaluate an expression, and recursively evaluate list elements and
attributes. */
Expr strictEvalExpr(EvalState & state, Expr e);
/* Specific results. */ /* Specific results. */
string evalString(EvalState & state, Expr e); string evalString(EvalState & state, Expr e);
Path evalPath(EvalState & state, Expr e); Path evalPath(EvalState & state, Expr e);

45
src/nix-instantiate/main.cc
View file

@ -135,56 +135,13 @@ static void printResult(EvalState & state, Expr e,
} }
Expr strictEval(EvalState & state, Expr e)
{
e = evalExpr(state, e);
ATermList as;
if (matchAttrs(e, as)) {
ATermList as2 = ATempty;
for (ATermIterator i(as); i; ++i) {
ATerm name; Expr e; ATerm pos;
if (!matchBind(*i, name, e, pos)) abort(); /* can't happen */
as2 = ATinsert(as2, makeBind(name, strictEval(state, e), pos));
}
return makeAttrs(ATreverse(as2));
}
ATermList formals;
ATerm body, pos;
if (matchFunction(e, formals, body, pos)) {
ATermList formals2 = ATempty;
for (ATermIterator i(formals); i; ++i) {
Expr name; ValidValues valids; ATerm dummy;
if (!matchFormal(*i, name, valids, dummy)) abort();
ATermList valids2;
if (matchValidValues(valids, valids2)) {
ATermList valids3 = ATempty;
for (ATermIterator j(valids2); j; ++j)
valids3 = ATinsert(valids3, strictEval(state, *j));
valids = makeValidValues(ATreverse(valids3));
}
formals2 = ATinsert(formals2, makeFormal(name, valids, dummy));
}
return makeFunction(ATreverse(formals2), body, pos);
}
return e;
}
Expr doEval(EvalState & state, string attrPath, bool parseOnly, bool strict, Expr doEval(EvalState & state, string attrPath, bool parseOnly, bool strict,
const ATermMap & autoArgs, Expr e) const ATermMap & autoArgs, Expr e)
{ {
e = findAlongAttrPath(state, attrPath, autoArgs, e); e = findAlongAttrPath(state, attrPath, autoArgs, e);
if (!parseOnly) if (!parseOnly)
if (strict) if (strict)
e = strictEval(state, e); e = strictEvalExpr(state, e);
else else
e = evalExpr(state, e); e = evalExpr(state, e);
return e; return e;