xref: /freebsd-11.0-release/contrib/llvm/tools/lldb/tools/lldb-mi/MICmdArgValOptionLong.h

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

#pragma once

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

// Declarations:
class CMICmdArgContext;
class CMIUtilString;

//++ ============================================================================
// 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.
//          If *this argument has expected options following it the option objects
//          created to hold each of those option's values belong to *this argument
//          object and so are deleted when *this object goes out of scope.
//          Based on the Interpreter pattern.
//--
class CMICmdArgValOptionLong : public CMICmdArgValListBase
{
    // Methods:
  public:
    /* ctor */ CMICmdArgValOptionLong();
    /* ctor */ CMICmdArgValOptionLong(const CMIUtilString &vrArgName, const bool vbMandatory, const bool vbHandleByCmd);
    /* ctor */ CMICmdArgValOptionLong(const CMIUtilString &vrArgName, const bool vbMandatory, const bool vbHandleByCmd,
                                      const ArgValType_e veType, const MIuint vnExpectingNOptions);
    //
    bool IsArgLongOption(const CMIUtilString &vrTxt) const;
    const VecArgObjPtr_t &GetExpectedOptions() const;
    template <class T1, typename T2> bool GetExpectedOption(T2 &vrwValue) const;

    // Overridden:
  public:
    // From CMICmdArgValBase
    /* dtor */ ~CMICmdArgValOptionLong() override;
    // From CMICmdArgSet::IArg
    bool Validate(CMICmdArgContext &vArgContext) override;

    // Methods:
  protected:
    bool ExtractExpectedOptions(CMICmdArgContext &vrwTxt, const MIuint nArgIndex);

    // Overrideable:
  protected:
    virtual bool IsArgOptionCorrect(const CMIUtilString &vrTxt) const;
    virtual bool ArgNameMatch(const CMIUtilString &vrTxt) const;

    // Methods:
  private:
    void Destroy();

    // Attributes:
  private:
    MIuint m_nExpectingNOptions;         // The number of options expected to read following *this argument
    VecArgObjPtr_t m_vecArgsExpected;    // The option objects holding the value extracted following *this argument
    ArgValType_e m_eExpectingOptionType; // The type of options expected to read following *this argument
};

//++ ------------------------------------------------------------------------------------
// 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
CMICmdArgValOptionLong::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;
}