llvm-project/lldb/tools/lldb-mi/MICmdArgValListOfN.h

//===-- MICmdArgValListOfN.h ------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

//++
// File:        MICmdArgValListOfN.h
//
// Overview:    CMICmdArgValListOfN interface.
//
// Environment: Compilers:  Visual C++ 12.
//                          gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
//              Libraries:  See MIReadmetxt.
//
// Copyright:   None.
//--

#pragma once

// Third party headers:
#include <vector>

// In-house headers:
#include "MICmdArgValListBase.h"

// Declarations:
class CMICmdArgContext;

//++ ============================================================================
// Details: MI common code class. Command argument class. Arguments object
//          needing specialization derived from the CMICmdArgValBase class.
//          An argument knows what type of argument it is and how it is to
//          interpret the options (context) string to find and validate a matching
//          argument and so extract a value from it .
//          The CMICmdArgValBase objects added to *this ListOfN container belong
//          to this container and will be deleted when *this object goes out of
//          scope.
//          To parse arguments like 'thread-id ...' i.e. 1 10 12 13 ...
//          If vbMandatory argument is true it takes on the (...)+ specification
//          otherwise assumed to be (...)* specification.
//          Based on the Interpreter pattern.
// Gotchas: None.
// Authors: Illya Rudkin 16/04/2014.
// Changes: None.
//--
class CMICmdArgValListOfN : public CMICmdArgValListBase
{
    // Methods:
  public:
    /* ctor */ CMICmdArgValListOfN(void);
    /* ctor */ CMICmdArgValListOfN(const CMIUtilString &vrArgName, const bool vbMandatory, const bool vbHandleByCmd,
                                   const ArgValType_e veType);
    //
    const VecArgObjPtr_t &GetExpectedOptions(void) const;
    template <class T1, typename T2> bool GetExpectedOption(T2 &vrwValue) const;

    // Overridden:
  public:
    // From CMICmdArgValBase
    /* dtor */ virtual ~CMICmdArgValListOfN(void);
    // From CMICmdArgSet::IArg
    virtual bool Validate(CMICmdArgContext &vArgContext);

    // Methods:
  private:
    bool IsListOfN(const CMIUtilString &vrTxt) const;
    bool CreateList(const CMIUtilString &vrTxt);
};

//++ ------------------------------------------------------------------------------------
// Details: Retrieve the first argument or option value from the list of 1 or more options
//          parsed from the command's options string.
// Type:    Template method.
// Args:    vrwValue    - (W) Templated type return value.
//          T1          - The argument value's class type of the data hold in the list of options.
//          T2          - The type pf the variable which holds the value wanted.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed. List of object was empty.
// Throws:  None.
//--
template <class T1, typename T2>
bool
CMICmdArgValListOfN::GetExpectedOption(T2 &vrwValue) const
{
    const VecArgObjPtr_t &rVecOptions(GetExpectedOptions());
    VecArgObjPtr_t::const_iterator it2 = rVecOptions.begin();
    if (it2 != rVecOptions.end())
    {
        const T1 *pOption = static_cast<T1 *>(*it2);
        vrwValue = pOption->GetValue();
        return MIstatus::success;
    }

    return MIstatus::failure;
}