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#include "parse_tree.h"
namespace NSQLTranslationV1 {
const TRule_select_or_expr* GetSelectOrExpr(const TRule_smart_parenthesis& msg) {
if (!msg.GetBlock2().HasAlt1()) {
return nullptr;
}
return &msg.GetBlock2()
.GetAlt1()
.GetRule_select_subexpr1()
.GetRule_select_subexpr_intersect1()
.GetRule_select_or_expr1();
}
const TRule_tuple_or_expr* GetTupleOrExpr(const TRule_smart_parenthesis& msg) {
const auto* select_or_expr = GetSelectOrExpr(msg);
if (!select_or_expr) {
return nullptr;
}
if (!select_or_expr->HasAlt_select_or_expr2()) {
return nullptr;
}
return &select_or_expr
->GetAlt_select_or_expr2()
.GetRule_tuple_or_expr1();
}
const TRule_smart_parenthesis* GetParenthesis(const TRule_expr& msg) {
if (!msg.HasAlt_expr1()) {
return nullptr;
}
const auto& con = msg.GetAlt_expr1()
.GetRule_or_subexpr1()
.GetRule_and_subexpr1()
.GetRule_xor_subexpr1()
.GetRule_eq_subexpr1()
.GetRule_neq_subexpr1()
.GetRule_bit_subexpr1()
.GetRule_add_subexpr1()
.GetRule_mul_subexpr1()
.GetRule_con_subexpr1();
if (!con.HasAlt_con_subexpr1()) {
return nullptr;
}
const auto& unary_subexpr = con.GetAlt_con_subexpr1()
.GetRule_unary_subexpr1();
if (!unary_subexpr.HasAlt_unary_subexpr1()) {
return nullptr;
}
const auto& block = unary_subexpr.GetAlt_unary_subexpr1()
.GetRule_unary_casual_subexpr1()
.GetBlock1();
if (!block.HasAlt2()) {
return nullptr;
}
const auto& atom = block.GetAlt2()
.GetRule_atom_expr1();
if (!atom.HasAlt_atom_expr3()) {
return nullptr;
}
return &atom.GetAlt_atom_expr3()
.GetRule_lambda1()
.GetRule_smart_parenthesis1();
}
bool IsSelect(const TRule_smart_parenthesis& msg) {
const auto* select_or_expr = GetSelectOrExpr(msg);
if (!select_or_expr) {
return false;
}
if (select_or_expr->HasAlt_select_or_expr1()) {
return true;
}
return IsSelect(
select_or_expr
->GetAlt_select_or_expr2()
.GetRule_tuple_or_expr1()
.GetRule_expr1());
}
bool IsSelect(const TRule_expr& msg) {
const auto* parenthesis = GetParenthesis(msg);
if (!parenthesis) {
return false;
}
return IsSelect(*parenthesis);
}
bool IsOnlySubExpr(const TRule_select_subexpr& node) {
return node.GetBlock2().size() == 0 &&
node.GetRule_select_subexpr_intersect1().GetBlock2().size() == 0;
}
} // namespace NSQLTranslationV1
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