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libexpr: Move identifier-like printing to print.cc

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This commit is contained in:
Robert Hensing 2023-04-16 14:07:35 +02:00
parent 28a5cdde02
commit b6125772d7
4 changed files with 73 additions and 28 deletions
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27
src/libexpr/nixexpr.cc
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@ -61,33 +61,12 @@ Pos::operator std::shared_ptr<AbstractPos>() const
return pos;
}
/* Displaying abstract syntax trees. */
// FIXME: remove, because *symbols* are abstract and do not have a single
// textual representation; see printIdentifier()
std::ostream & operator <<(std::ostream & str, const SymbolStr & symbol)
{
std::string_view s = symbol;
if (s.empty())
str << "\"\"";
else if (s == "if") // FIXME: handle other keywords
str << '"' << s << '"';
else {
char c = s[0];
if (!((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')) {
printLiteralString(str, s);
return str;
}
for (auto c : s)
if (!((c >= 'a' && c <= 'z') ||
(c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9') ||
c == '_' || c == '\'' || c == '-')) {
printLiteralString(str, s);
return str;
}
str << s;
}
return str;
return printIdentifier(str, s);
}
void Expr::show(const SymbolTable & symbols, std::ostream & str) const