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Make subcommand construction in MultiCommand lazy

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(cherry picked from commit a0de58f471)
This commit is contained in:
Eelco Dolstra 2019-06-18 16:01:35 +02:00
parent f964f428fe
commit ac67685606
28 changed files with 61 additions and 201 deletions
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13
src/libutil/args.hh
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@ -192,8 +192,15 @@ public:
run() method. */
struct Command : virtual Args
{
private:
std::string _name;
public:
virtual ~Command() { }
virtual std::string name() = 0;
std::string name() { return _name; }
virtual void prepare() { };
virtual void run() = 0;
@ -210,7 +217,7 @@ struct Command : virtual Args
void printHelp(const string & programName, std::ostream & out) override;
};
typedef std::map<std::string, ref<Command>> Commands;
typedef std::map<std::string, std::function<ref<Command>()>> Commands;
/* An argument parser that supports multiple subcommands,
i.e. ‘<command> <subcommand>’. */
@ -221,7 +228,7 @@ public:
std::shared_ptr<Command> command;
MultiCommand(const std::vector<ref<Command>> & commands);
MultiCommand(const Commands & commands);
void printHelp(const string & programName, std::ostream & out) override;