ClickHouse/dbms/include/DB/Parsers/ASTExpressionList.h
2016-07-17 23:10:50 +03:00

62 lines
1.5 KiB
C++

#pragma once
#include <DB/Parsers/IAST.h>
namespace DB
{
/** List of expressions, for example "a, b + c, f(d)"
*/
class ASTExpressionList : public IAST
{
public:
ASTExpressionList() = default;
ASTExpressionList(const StringRange range_) : IAST(range_) {}
String getID() const override { return "ExpressionList"; }
ASTPtr clone() const override
{
const auto res = std::make_shared<ASTExpressionList>(*this);
res->children.clear();
for (const auto & child : children)
res->children.emplace_back(child->clone());
return res;
}
void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override
{
for (ASTs::const_iterator it = children.begin(); it != children.end(); ++it)
{
if (it != children.begin())
settings.ostr << ", ";
(*it)->formatImpl(settings, state, frame);
}
}
/** Вывести список выражений в секциях запроса SELECT - по одному выражению на строку.
*/
void formatImplMultiline(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const
{
std::string indent_str = "\n" + std::string(4 * (frame.indent + 1), ' ');
++frame.indent;
for (ASTs::const_iterator it = children.begin(); it != children.end(); ++it)
{
if (it != children.begin())
settings.ostr << ", ";
if (children.size() > 1)
settings.ostr << indent_str;
(*it)->formatImpl(settings, state, frame);
}
}
};
}