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refactor: use string accessors

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Create context, string_view, and c_str, accessors throughout in order to
better support improvements to the underlying string representation.
This commit is contained in:
Tom Bereknyei 2023-09-25 21:30:41 -04:00
parent 7e24dc606b
commit 399ef84420
13 changed files with 56 additions and 46 deletions
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18
src/libexpr/eval.cc
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@ -114,7 +114,7 @@ void Value::print(const SymbolTable &symbols, std::ostream &str,
printLiteralBool(str, boolean);
break;
case tString:
printLiteralString(str, string.s);
printLiteralString(str, string_view());
break;
case tPath:
str << path().to_string(); // !!! escaping?
@ -339,7 +339,7 @@ static Symbol getName(const AttrName & name, EvalState & state, Env & env)
Value nameValue;
name.expr->eval(state, env, nameValue);
state.forceStringNoCtx(nameValue, noPos, "while evaluating an attribute name");
return state.symbols.create(nameValue.string.s);
return state.symbols.create(nameValue.string_view());
}
}
@ -1343,7 +1343,7 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
if (nameVal.type() == nNull)
continue;
state.forceStringNoCtx(nameVal, i.pos, "while evaluating the name of a dynamic attribute");
auto nameSym = state.symbols.create(nameVal.string.s);
auto nameSym = state.symbols.create(nameVal.string_view());
Bindings::iterator j = v.attrs->find(nameSym);
if (j != v.attrs->end())
state.error("dynamic attribute '%1%' already defined at %2%", state.symbols[nameSym], state.positions[j->pos]).atPos(i.pos).withFrame(env, *this).debugThrow<EvalError>();
@ -2155,7 +2155,7 @@ std::string_view EvalState::forceString(Value & v, const PosIdx pos, std::string
forceValue(v, pos);
if (v.type() != nString)
error("value is %1% while a string was expected", showType(v)).debugThrow<TypeError>();
return v.string.s;
return v.string_view();
} catch (Error & e) {
e.addTrace(positions[pos], errorCtx);
throw;
@ -2182,8 +2182,8 @@ std::string_view EvalState::forceString(Value & v, NixStringContext & context, c
std::string_view EvalState::forceStringNoCtx(Value & v, const PosIdx pos, std::string_view errorCtx)
{
auto s = forceString(v, pos, errorCtx);
if (v.string.context) {
error("the string '%1%' is not allowed to refer to a store path (such as '%2%')", v.string.s, v.string.context[0]).withTrace(pos, errorCtx).debugThrow<EvalError>();
if (v.context()) {
error("the string '%1%' is not allowed to refer to a store path (such as '%2%')", v.string_view(), v.context()[0]).withTrace(pos, errorCtx).debugThrow<EvalError>();
}
return s;
}
@ -2196,7 +2196,7 @@ bool EvalState::isDerivation(Value & v)
if (i == v.attrs->end()) return false;
forceValue(*i->value, i->pos);
if (i->value->type() != nString) return false;
return strcmp(i->value->string.s, "derivation") == 0;
return i->value->string_view().compare("derivation") == 0;
}
@ -2228,7 +2228,7 @@ BackedStringView EvalState::coerceToString(
if (v.type() == nString) {
copyContext(v, context);
return std::string_view(v.string.s);
return v.string_view();
}
if (v.type() == nPath) {
@ -2426,7 +2426,7 @@ bool EvalState::eqValues(Value & v1, Value & v2, const PosIdx pos, std::string_v
return v1.boolean == v2.boolean;
case nString:
return strcmp(v1.string.s, v2.string.s) == 0;
return v1.string_view().compare(v2.string_view()) == 0;
case nPath:
return strcmp(v1._path, v2._path) == 0;