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Add some context to coercion error strings

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This commit is contained in:
Guillaume Maudoux 2022-03-03 21:46:20 +01:00
parent 391f4fcabe
commit 00e242feed
2 changed files with 15 additions and 26 deletions
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36
src/libexpr/eval.cc
View file

@ -850,7 +850,7 @@ inline Value * EvalState::lookupVar(Env * env, const ExprVar & var, bool noEval)
if (env->type == Env::HasWithExpr) { if (env->type == Env::HasWithExpr) {
if (noEval) return 0; if (noEval) return 0;
Value * v = allocValue(); Value * v = allocValue();
evalAttrs(*env->up, (Expr *) env->values[0], *v); evalAttrs(*env->up, (Expr *) env->values[0], *v, noPos, "<borked>");
env->values[0] = v; env->values[0] = v;
env->type = Env::HasWithAttrs; env->type = Env::HasWithAttrs;
} }
@ -1055,31 +1055,21 @@ void EvalState::eval(Expr * e, Value & v)
} }
inline bool EvalState::evalBool(Env & env, Expr * e) inline bool EvalState::evalBool(Env & env, Expr * e, const Pos & pos, const std::string & location)
{ {
Value v; Value v;
e->eval(*this, env, v); e->eval(*this, env, v);
if (v.type() != nBool) if (v.type() != nBool)
throwTypeError("value is %1% while a Boolean was expected", v); throwTypeError(pos, (location + ": value is %1% while a Boolean was expected").c_str(), v);
return v.boolean; return v.boolean;
} }
inline bool EvalState::evalBool(Env & env, Expr * e, const Pos & pos) inline void EvalState::evalAttrs(Env & env, Expr * e, Value & v, const Pos & pos, const std::string & location)
{
Value v;
e->eval(*this, env, v);
if (v.type() != nBool)
throwTypeError(pos, "value is %1% while a Boolean was expected", v);
return v.boolean;
}
inline void EvalState::evalAttrs(Env & env, Expr * e, Value & v)
{ {
e->eval(*this, env, v); e->eval(*this, env, v);
if (v.type() != nAttrs) if (v.type() != nAttrs)
throwTypeError("value is %1% while a set was expected", v); throwTypeError(pos, (location + ": value is %1% while a set was expected").c_str(), v);
} }
@ -1577,13 +1567,13 @@ void ExprWith::eval(EvalState & state, Env & env, Value & v)
void ExprIf::eval(EvalState & state, Env & env, Value & v) void ExprIf::eval(EvalState & state, Env & env, Value & v)
{ {
(state.evalBool(env, cond, pos) ? then : else_)->eval(state, env, v); (state.evalBool(env, cond, pos, "In the condition of the if operator") ? then : else_)->eval(state, env, v);
} }
void ExprAssert::eval(EvalState & state, Env & env, Value & v) void ExprAssert::eval(EvalState & state, Env & env, Value & v)
{ {
if (!state.evalBool(env, cond, pos)) { if (!state.evalBool(env, cond, pos, "In the condition of the assert statement")) {
std::ostringstream out; std::ostringstream out;
cond->show(out); cond->show(out);
throwAssertionError(pos, "assertion '%1%' failed", out.str()); throwAssertionError(pos, "assertion '%1%' failed", out.str());
@ -1594,7 +1584,7 @@ void ExprAssert::eval(EvalState & state, Env & env, Value & v)
void ExprOpNot::eval(EvalState & state, Env & env, Value & v) void ExprOpNot::eval(EvalState & state, Env & env, Value & v)
{ {
v.mkBool(!state.evalBool(env, e)); v.mkBool(!state.evalBool(env, e, noPos, "In the argument of the not operator")); // XXX: FIXME: !
} }
@ -1616,27 +1606,27 @@ void ExprOpNEq::eval(EvalState & state, Env & env, Value & v)
void ExprOpAnd::eval(EvalState & state, Env & env, Value & v) void ExprOpAnd::eval(EvalState & state, Env & env, Value & v)
{ {
v.mkBool(state.evalBool(env, e1, pos) && state.evalBool(env, e2, pos)); v.mkBool(state.evalBool(env, e1, pos, "In the left operand of the AND (&&) operator") && state.evalBool(env, e2, pos, "In the right operand of the AND (&&) operator"));
} }
void ExprOpOr::eval(EvalState & state, Env & env, Value & v) void ExprOpOr::eval(EvalState & state, Env & env, Value & v)
{ {
v.mkBool(state.evalBool(env, e1, pos) || state.evalBool(env, e2, pos)); v.mkBool(state.evalBool(env, e1, pos, "In the left operand of the OR (||) operator") || state.evalBool(env, e2, pos, "In the right operand of the OR (||) operator"));
} }
void ExprOpImpl::eval(EvalState & state, Env & env, Value & v) void ExprOpImpl::eval(EvalState & state, Env & env, Value & v)
{ {
v.mkBool(!state.evalBool(env, e1, pos) || state.evalBool(env, e2, pos)); v.mkBool(!state.evalBool(env, e1, pos, "In the left operand of the IMPL (->) operator") || state.evalBool(env, e2, pos, "In the right operand of the IMPL (->) operator"));
} }
void ExprOpUpdate::eval(EvalState & state, Env & env, Value & v) void ExprOpUpdate::eval(EvalState & state, Env & env, Value & v)
{ {
Value v1, v2; Value v1, v2;
state.evalAttrs(env, e1, v1); state.evalAttrs(env, e1, v1, pos, "In the left operand of the update (//) operator");
state.evalAttrs(env, e2, v2); state.evalAttrs(env, e2, v2, pos, "In the right operand of the update (//) operator");
state.nrOpUpdates++; state.nrOpUpdates++;

5
src/libexpr/eval.hh
View file

@ -217,9 +217,8 @@ public:
/* Evaluation the expression, then verify that it has the expected /* Evaluation the expression, then verify that it has the expected
type. */ type. */
inline bool evalBool(Env & env, Expr * e); inline bool evalBool(Env & env, Expr * e, const Pos & pos, const std::string & location);
inline bool evalBool(Env & env, Expr * e, const Pos & pos); inline void evalAttrs(Env & env, Expr * e, Value & v, const Pos & pos, const std::string & location);
inline void evalAttrs(Env & env, Expr * e, Value & v);
/* If `v' is a thunk, enter it and overwrite `v' with the result /* If `v' is a thunk, enter it and overwrite `v' with the result
of the evaluation of the thunk. If `v' is a delayed function of the evaluation of the thunk. If `v' is a delayed function