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libexpr: add expr memory management

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with the prepatory work done this mostly means turning plain pointers
into unique_ptrs, with all the associated churn that necessitates. we
might want to change some of these to box_ptrs at some point as well,
but that would be a semantic change that isn't fully appropriate yet.

Change-Id: I0c238c118617420650432f4ed45569baa3e3f413
This commit is contained in:
eldritch horrors
2024-06-17 19:46:44 +00:00
parent ad5366c2ad
commit bcb774688f
9 changed files with 175 additions and 159 deletions
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src/libexpr/nixexpr.hh
+44 -44
View File
@@ -28,9 +28,9 @@ struct StaticEnv;
struct AttrName
{
Symbol symbol;
Expr * expr;
std::unique_ptr<Expr> expr;
AttrName(Symbol s) : symbol(s) {};
AttrName(Expr * e) : expr(e) {};
AttrName(std::unique_ptr<Expr> e) : expr(std::move(e)) {};
};
typedef std::vector<AttrName> AttrPath;
@@ -157,19 +157,19 @@ struct ExprInheritFrom : ExprVar
struct ExprSelect : Expr
{
PosIdx pos;
Expr * e, * def;
std::unique_ptr<Expr> e, def;
AttrPath attrPath;
ExprSelect(const PosIdx & pos, Expr * e, AttrPath attrPath, Expr * def) : pos(pos), e(e), def(def), attrPath(std::move(attrPath)) { };
ExprSelect(const PosIdx & pos, Expr * e, Symbol name) : pos(pos), e(e), def(0) { attrPath.push_back(AttrName(name)); };
ExprSelect(const PosIdx & pos, std::unique_ptr<Expr> e, AttrPath attrPath, std::unique_ptr<Expr> def) : pos(pos), e(std::move(e)), def(std::move(def)), attrPath(std::move(attrPath)) { };
ExprSelect(const PosIdx & pos, std::unique_ptr<Expr> e, Symbol name) : pos(pos), e(std::move(e)) { attrPath.push_back(AttrName(name)); };
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
struct ExprOpHasAttr : Expr
{
Expr * e;
std::unique_ptr<Expr> e;
AttrPath attrPath;
ExprOpHasAttr(Expr * e, AttrPath attrPath) : e(e), attrPath(std::move(attrPath)) { };
ExprOpHasAttr(std::unique_ptr<Expr> e, AttrPath attrPath) : e(std::move(e)), attrPath(std::move(attrPath)) { };
PosIdx getPos() const override { return e->getPos(); }
COMMON_METHODS
};
@@ -189,11 +189,11 @@ struct ExprAttrs : Expr
};
Kind kind;
Expr * e;
std::unique_ptr<Expr> e;
PosIdx pos;
Displacement displ; // displacement
AttrDef(Expr * e, const PosIdx & pos, Kind kind = Kind::Plain)
: kind(kind), e(e), pos(pos) { };
AttrDef(std::unique_ptr<Expr> e, const PosIdx & pos, Kind kind = Kind::Plain)
: kind(kind), e(std::move(e)), pos(pos) { };
AttrDef() { };
template<typename T>
@@ -212,12 +212,12 @@ struct ExprAttrs : Expr
};
typedef std::map<Symbol, AttrDef> AttrDefs;
AttrDefs attrs;
std::unique_ptr<std::vector<Expr *>> inheritFromExprs;
std::unique_ptr<std::vector<std::unique_ptr<Expr>>> inheritFromExprs;
struct DynamicAttrDef {
Expr * nameExpr, * valueExpr;
std::unique_ptr<Expr> nameExpr, valueExpr;
PosIdx pos;
DynamicAttrDef(Expr * nameExpr, Expr * valueExpr, const PosIdx & pos)
: nameExpr(nameExpr), valueExpr(valueExpr), pos(pos) { };
DynamicAttrDef(std::unique_ptr<Expr> nameExpr, std::unique_ptr<Expr> valueExpr, const PosIdx & pos)
: nameExpr(std::move(nameExpr)), valueExpr(std::move(valueExpr)), pos(pos) { };
};
typedef std::vector<DynamicAttrDef> DynamicAttrDefs;
DynamicAttrDefs dynamicAttrs;
@@ -234,7 +234,7 @@ struct ExprAttrs : Expr
struct ExprList : Expr
{
std::vector<Expr *> elems;
std::vector<std::unique_ptr<Expr>> elems;
ExprList() { };
COMMON_METHODS
Value * maybeThunk(EvalState & state, Env & env) override;
@@ -249,7 +249,7 @@ struct Formal
{
PosIdx pos;
Symbol name;
Expr * def;
std::unique_ptr<Expr> def;
};
/** Attribute set destructuring in arguments of a lambda, if present */
@@ -266,9 +266,9 @@ struct Formals
return it != formals.end() && it->name == arg;
}
std::vector<Formal> lexicographicOrder(const SymbolTable & symbols) const
std::vector<std::reference_wrapper<const Formal>> lexicographicOrder(const SymbolTable & symbols) const
{
std::vector<Formal> result(formals.begin(), formals.end());
std::vector<std::reference_wrapper<const Formal>> result(formals.begin(), formals.end());
std::sort(result.begin(), result.end(),
[&] (const Formal & a, const Formal & b) {
std::string_view sa = symbols[a.name], sb = symbols[b.name];
@@ -292,14 +292,14 @@ struct ExprLambda : Expr
Symbol arg;
/** Formals are present when the lambda destructures an attr set as
* argument, with or without ellipsis */
Formals * formals;
Expr * body;
ExprLambda(PosIdx pos, Symbol arg, Formals * formals, Expr * body)
: pos(pos), arg(arg), formals(formals), body(body)
std::unique_ptr<Formals> formals;
std::unique_ptr<Expr> body;
ExprLambda(PosIdx pos, Symbol arg, std::unique_ptr<Formals> formals, std::unique_ptr<Expr> body)
: pos(pos), arg(arg), formals(std::move(formals)), body(std::move(body))
{
};
ExprLambda(PosIdx pos, Formals * formals, Expr * body)
: pos(pos), formals(formals), body(body)
ExprLambda(PosIdx pos, std::unique_ptr<Formals> formals, std::unique_ptr<Expr> body)
: pos(pos), formals(std::move(formals)), body(std::move(body))
{
}
void setName(Symbol name) override;
@@ -336,11 +336,11 @@ struct ExprLambda : Expr
struct ExprCall : Expr
{
Expr * fun;
std::vector<Expr *> args;
std::unique_ptr<Expr> fun;
std::vector<std::unique_ptr<Expr>> args;
PosIdx pos;
ExprCall(const PosIdx & pos, Expr * fun, std::vector<Expr *> && args)
: fun(fun), args(std::move(args)), pos(pos)
ExprCall(const PosIdx & pos, std::unique_ptr<Expr> fun, std::vector<std::unique_ptr<Expr>> && args)
: fun(std::move(fun)), args(std::move(args)), pos(pos)
{ }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
@@ -348,19 +348,19 @@ struct ExprCall : Expr
struct ExprLet : Expr
{
ExprAttrs * attrs;
Expr * body;
ExprLet(ExprAttrs * attrs, Expr * body) : attrs(attrs), body(body) { };
std::unique_ptr<ExprAttrs> attrs;
std::unique_ptr<Expr> body;
ExprLet(std::unique_ptr<ExprAttrs> attrs, std::unique_ptr<Expr> body) : attrs(std::move(attrs)), body(std::move(body)) { };
COMMON_METHODS
};
struct ExprWith : Expr
{
PosIdx pos;
Expr * attrs, * body;
std::unique_ptr<Expr> attrs, body;
size_t prevWith;
ExprWith * parentWith;
ExprWith(const PosIdx & pos, Expr * attrs, Expr * body) : pos(pos), attrs(attrs), body(body) { };
ExprWith(const PosIdx & pos, std::unique_ptr<Expr> attrs, std::unique_ptr<Expr> body) : pos(pos), attrs(std::move(attrs)), body(std::move(body)) { };
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@@ -368,8 +368,8 @@ struct ExprWith : Expr
struct ExprIf : Expr
{
PosIdx pos;
Expr * cond, * then, * else_;
ExprIf(const PosIdx & pos, Expr * cond, Expr * then, Expr * else_) : pos(pos), cond(cond), then(then), else_(else_) { };
std::unique_ptr<Expr> cond, then, else_;
ExprIf(const PosIdx & pos, std::unique_ptr<Expr> cond, std::unique_ptr<Expr> then, std::unique_ptr<Expr> else_) : pos(pos), cond(std::move(cond)), then(std::move(then)), else_(std::move(else_)) { };
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@@ -377,16 +377,16 @@ struct ExprIf : Expr
struct ExprAssert : Expr
{
PosIdx pos;
Expr * cond, * body;
ExprAssert(const PosIdx & pos, Expr * cond, Expr * body) : pos(pos), cond(cond), body(body) { };
std::unique_ptr<Expr> cond, body;
ExprAssert(const PosIdx & pos, std::unique_ptr<Expr> cond, std::unique_ptr<Expr> body) : pos(pos), cond(std::move(cond)), body(std::move(body)) { };
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
struct ExprOpNot : Expr
{
Expr * e;
ExprOpNot(Expr * e) : e(e) { };
std::unique_ptr<Expr> e;
ExprOpNot(std::unique_ptr<Expr> e) : e(std::move(e)) { };
PosIdx getPos() const override { return e->getPos(); }
COMMON_METHODS
};
@@ -395,9 +395,9 @@ struct ExprOpNot : Expr
struct name : Expr \
{ \
PosIdx pos; \
Expr * e1, * e2; \
name(Expr * e1, Expr * e2) : e1(e1), e2(e2) { }; \
name(const PosIdx & pos, Expr * e1, Expr * e2) : pos(pos), e1(e1), e2(e2) { }; \
std::unique_ptr<Expr> e1, e2; \
name(std::unique_ptr<Expr> e1, std::unique_ptr<Expr> e2) : e1(std::move(e1)), e2(std::move(e2)) { }; \
name(const PosIdx & pos, std::unique_ptr<Expr> e1, std::unique_ptr<Expr> e2) : pos(pos), e1(std::move(e1)), e2(std::move(e2)) { }; \
void show(const SymbolTable & symbols, std::ostream & str) const override \
{ \
str << "("; e1->show(symbols, str); str << " " s " "; e2->show(symbols, str); str << ")"; \
@@ -422,8 +422,8 @@ struct ExprConcatStrings : Expr
{
PosIdx pos;
bool forceString;
std::vector<std::pair<PosIdx, Expr *>> es;
ExprConcatStrings(const PosIdx & pos, bool forceString, std::vector<std::pair<PosIdx, Expr *>> es)
std::vector<std::pair<PosIdx, std::unique_ptr<Expr>>> es;
ExprConcatStrings(const PosIdx & pos, bool forceString, std::vector<std::pair<PosIdx, std::unique_ptr<Expr>>> es)
: pos(pos), forceString(forceString), es(std::move(es)) { };
PosIdx getPos() const override { return pos; }
COMMON_METHODS