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bitset subset

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kalsprite
2026-08-15 23:25:13 -07:00
parent 36d0b056a2
commit a7029ef7b6
2 changed files with 88 additions and 8 deletions
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18
src/check_expr.cpp
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@@ -3343,27 +3343,29 @@ gb_internal void check_comparison(CheckerContext *c, Ast *node, Operand *x, Oper
case Token_Lt:
case Token_LtEq:
{
// subset: (lhs & rhs) == lhs. a proper subset also requires lhs != rhs
ExactValue lhs = x->value;
ExactValue rhs = y->value;
ExactValue res = exact_binary_operator_value(Token_And, lhs, rhs);
res = exact_value_bool(compare_exact_values(op, res, lhs));
ExactValue both = exact_binary_operator_value(Token_And, lhs, rhs);
bool res = compare_exact_values(Token_CmpEq, both, lhs);
if (op == Token_Lt) {
res = exact_binary_operator_value(Token_And, res, exact_value_bool(compare_exact_values(op, lhs, rhs)));
res = res && compare_exact_values(Token_NotEq, lhs, rhs);
}
x->value = res;
x->value = exact_value_bool(res);
break;
}
case Token_Gt:
case Token_GtEq:
{
// superset: (lhs & rhs) == rhs
ExactValue lhs = x->value;
ExactValue rhs = y->value;
ExactValue res = exact_binary_operator_value(Token_And, lhs, rhs);
res = exact_value_bool(compare_exact_values(op, res, rhs));
ExactValue both = exact_binary_operator_value(Token_And, lhs, rhs);
bool res = compare_exact_values(Token_CmpEq, both, rhs);
if (op == Token_Gt) {
res = exact_binary_operator_value(Token_And, res, exact_value_bool(compare_exact_values(op, lhs, rhs)));
res = res && compare_exact_values(Token_NotEq, lhs, rhs);
}
x->value = res;
x->value = exact_value_bool(res);
break;
}
}