ClickHouse/dbms/src/Common/Macros.h
2018-05-07 05:01:11 +03:00

47 lines
861 B
C++

#pragma once
#include <Core/Types.h>
#include <Core/Names.h>
#include <map>
namespace Poco
{
namespace Util
{
class AbstractConfiguration;
}
}
namespace DB
{
/** Apply substitutions from the macros in config to the string.
*/
class Macros
{
public:
Macros();
Macros(const Poco::Util::AbstractConfiguration & config, const String & key);
/** Replace the substring of the form {macro_name} with the value for macro_name, obtained from the config file.
* level - the level of recursion.
*/
String expand(const String & s, size_t level = 0) const;
/** Apply expand for the list.
*/
Names expand(const Names & source_names, size_t level = 0) const;
using MacroMap = std::map<String, String>;
const MacroMap getMacroMap() const { return macros; }
private:
MacroMap macros;
};
}