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* More missing constructs.

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This commit is contained in:
Eelco Dolstra 2010-04-12 21:21:24 +00:00
parent 4d6ad5be17
commit a60317f20f
6 changed files with 161 additions and 138 deletions
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41
src/libexpr/nixexpr.cc
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@ -40,6 +40,11 @@ void ExprSelect::show(std::ostream & str)
str << "(" << *e << ")." << name;
}
void ExprOpHasAttr::show(std::ostream & str)
{
str << "(" << *e << ") ? " << name;
}
void ExprAttrs::show(std::ostream & str)
{
if (recursive) str << "rec ";
@ -87,19 +92,37 @@ void ExprIf::show(std::ostream & str)
str << "if " << *cond << " then " << *then << " else " << *else_;
}
#if 0
string showPos(ATerm pos)
void ExprAssert::show(std::ostream & str)
{
ATerm path;
int line, column;
if (matchNoPos(pos)) return "undefined position";
if (!matchPos(pos, path, line, column))
throw badTerm("position expected", pos);
return (format("`%1%:%2%:%3%'") % aterm2String(path) % line % column).str();
str << "assert " << *cond << "; " << *body;
}
void ExprOpNot::show(std::ostream & str)
{
str << "! " << *e;
}
void ExprConcatStrings::show(std::ostream & str)
{
bool first = true;
foreach (vector<Expr *>::iterator, i, *es) {
if (first) first = false; else str << " + ";
str << **i;
}
}
std::ostream & operator << (std::ostream & str, const Pos & pos)
{
if (!pos.line)
str << "undefined position";
else
str << (format("`%1%:%2%:%3%'") % pos.file % pos.line % pos.column).str();
return str;
}
#if 0
ATerm bottomupRewrite(TermFun & f, ATerm e)
{
checkInterrupt();