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rename SymbolIdx -> Symbol, Symbol -> SymbolStr

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after #6218 `Symbol` no longer confers a uniqueness invariant on the
string it wraps, it is now possible to create multiple symbols that
compare equal but whose string contents have different addresses. this
guarantee is now only provided by `SymbolIdx`, leaving `Symbol` only as
a string wrapper that knows about the intricacies of how symbols need to
be formatted for output.

this change renames `SymbolIdx` to `Symbol` to restore the previous
semantics of `Symbol` to that name. we also keep the wrapper type and
rename it to `SymbolStr` instead of returning plain strings from lookups
into the symbol table because symbols are formatted for output in many
places. theoretically we do not need `SymbolStr`, only a function that
formats a string for output as a symbol, but having to wrap every symbol
that appears in a message into eg `formatSymbol()` is error-prone and
inconvient.
This commit is contained in:
pennae 2022-04-22 21:45:39 +02:00
parent 7f814d6d9a
commit a385e51a08
18 changed files with 171 additions and 159 deletions
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8
src/libexpr/eval.cc
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@ -308,7 +308,7 @@ static BoehmGCStackAllocator boehmGCStackAllocator;
#endif
static SymbolIdx getName(const AttrName & name, EvalState & state, Env & env)
static Symbol getName(const AttrName & name, EvalState & state, Env & env)
{
if (name.symbol) {
return name.symbol;
@ -769,7 +769,7 @@ void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::stri
});
}
void EvalState::throwEvalError(const PosIdx p1, const char * s, const SymbolIdx sym, const PosIdx p2) const
void EvalState::throwEvalError(const PosIdx p1, const char * s, const Symbol sym, const PosIdx p2) const
{
// p1 is where the error occurred; p2 is a position mentioned in the message.
throw EvalError({
@ -787,7 +787,7 @@ void EvalState::throwTypeError(const PosIdx pos, const char * s) const
}
void EvalState::throwTypeError(const PosIdx pos, const char * s, const ExprLambda & fun,
const SymbolIdx s2) const
const Symbol s2) const
{
throw TypeError({
.msg = hintfmt(s, fun.showNamePos(*this), symbols[s2]),
@ -796,7 +796,7 @@ void EvalState::throwTypeError(const PosIdx pos, const char * s, const ExprLambd
}
void EvalState::throwTypeError(const PosIdx pos, const Suggestions & suggestions, const char * s,
const ExprLambda & fun, const SymbolIdx s2) const
const ExprLambda & fun, const Symbol s2) const
{
throw TypeError(ErrorInfo {
.msg = hintfmt(s, fun.showNamePos(*this), symbols[s2]),