CPPValue Class Reference

A class representing a C-preprocessor value. More...

#include <src/cppvalue.h>

Public Types
enum class	Type { Int , Float }

Public Member Functions
constexpr	CPPValue (char c) noexcept
constexpr	CPPValue (long val=0) noexcept
constexpr	CPPValue (double val) noexcept
constexpr	operator double () const noexcept
constexpr	operator long () const noexcept
constexpr Type	type () const noexcept
void	print () const

Static Public Member Functions
static CPPValue	parseOctal (const std::string &token)
static CPPValue	parseDecimal (const std::string &token)
static CPPValue	parseHexadecimal (const std::string &token)
static CPPValue	parseBinary (const std::string &token)
static CPPValue	parseCharacter (const std::string &token)
static CPPValue	parseFloat (const std::string &token)

Private Attributes
Type	m_type
double	m_d
long	m_l

Detailed Description

A class representing a C-preprocessor value.

Definition at line 23 of file cppvalue.h.

Member Enumeration Documentation

Type

enum class CPPValue::Type

strong

Enumerator
Int
Float

Definition at line 26 of file cppvalue.h.

{ Int, Float };

Constructor & Destructor Documentation

CPPValue() [1/3]

CPPValue::CPPValue ( char c )

inlineexplicitconstexprnoexcept

Definition at line 28 of file cppvalue.h.

: m_type(Type::Int),   m_d(0.0), m_l(c)   {}

References Int.

Referenced by parseBinary(), parseCharacter(), parseDecimal(), parseFloat(), parseHexadecimal(), and parseOctal().

CPPValue() [2/3]

CPPValue::CPPValue ( long val = 0 )

inlineexplicitconstexprnoexcept

Definition at line 29 of file cppvalue.h.

: m_type(Type::Int),   m_d(0.0), m_l(val) {}

References m_d, m_l, and m_type.

CPPValue() [3/3]

CPPValue::CPPValue ( double val )

inlineexplicitconstexprnoexcept

Definition at line 30 of file cppvalue.h.

: m_type(Type::Float), m_d(val), m_l(0)   {}

References Float.

Member Function Documentation

operator double()

CPPValue::operator double ( ) const

inlineconstexprnoexcept

Definition at line 32 of file cppvalue.h.

{ return m_type==Type::Int ? static_cast<double>(m_l) : m_d; }

References Int, m_d, m_l, and m_type.

operator long()

CPPValue::operator long ( ) const

inlineconstexprnoexcept

Definition at line 33 of file cppvalue.h.

{ return m_type==Type::Int ? m_l : static_cast<long>(m_d);   }

References Int, m_d, m_l, and m_type.

parseBinary()

CPPValue CPPValue::parseBinary ( const std::string & token )

static

Definition at line 55 of file cppvalue.cpp.

{
  long val = 0;
  for (const char c : token)
  {
    if (c >= '0' && c <= '1') val = val * 2 + c - '0';
  }
  return CPPValue(val);
}

References CPPValue().

parseCharacter()

CPPValue CPPValue::parseCharacter ( const std::string & token )

static

Definition at line 65 of file cppvalue.cpp.

{
  assert(token.length()>0);
  if (token[1]=='\\')
  {
    assert(token.length()>1);
    switch(token[2])
    {
      case 'n':  return CPPValue('\n');
      case 't':  return CPPValue('\t');
      case 'v':  return CPPValue('\v');
      case 'b':  return CPPValue('\b');
      case 'r':  return CPPValue('\r');
      case 'f':  return CPPValue('\f');
      case 'a':  return CPPValue('\a');
      case '\\': return CPPValue('\\');
      case '?':  return CPPValue('\?');
      case '\'': return CPPValue('\'');
      case '"':  return CPPValue('"');
      case '0':  // fall through
      case '1':  // fall through
      case '2':  // fall through
      case '3':  // fall through
      case '4':  // fall through
      case '5':  // fall through
      case '6':  // fall through
      case '7':  // fall through
                 return parseOctal(token);
      case 'x':
      case 'X':  return parseHexadecimal(token);
      default:   printf("Invalid escape sequence %s found!\n",std::string(token).c_str());
                 return CPPValue(0L);
    }
  }
  return CPPValue(token[1]);
}

References CPPValue(), parseHexadecimal(), and parseOctal().

parseDecimal()

CPPValue CPPValue::parseDecimal ( const std::string & token )

static

Definition at line 32 of file cppvalue.cpp.

{
  long val = 0;
  for (const char c : token)
  {
    if (c >= '0' && c <= '9') val = val * 10 + c - '0';
  }
  return CPPValue(val);
}

References CPPValue().

parseFloat()

CPPValue CPPValue::parseFloat ( const std::string & token )

static

Definition at line 102 of file cppvalue.cpp.

{
  return CPPValue(std::stod(token));
}

References CPPValue().

parseHexadecimal()

CPPValue CPPValue::parseHexadecimal ( const std::string & token )

static

Definition at line 42 of file cppvalue.cpp.

{
  long val = 0;
  for (const char c : token)
  {
    if      (c >= '0' && c <= '9') val = val * 16 + c - '0';
    else if (c >= 'a' && c <= 'f') val = val * 16 + c - 'a' + 10;
    else if (c >= 'A' && c <= 'F') val = val * 16 + c - 'A' + 10;
  }
  //printf("parseHexadecimal %s->%x\n",qPrint(token),val);
  return CPPValue(val);
}

References CPPValue().

Referenced by parseCharacter().

parseOctal()

CPPValue CPPValue::parseOctal ( const std::string & token )

static

Definition at line 22 of file cppvalue.cpp.

{
  long val = 0;
  for (const char c : token)
  {
    if (c >= '0' && c <= '7') val = val * 8 + c - '0';
  }
  return CPPValue(val);
}

References CPPValue().

Referenced by parseCharacter().

print()

void CPPValue::print ( ) const

inline

Definition at line 37 of file cppvalue.h.

    {
      if (m_type==Type::Int)
        printf("(%ld)\n",m_l);
      else
        printf("(%f)\n",m_d);
    }

References Int, m_d, m_l, and m_type.

type()

Type CPPValue::type ( ) const

inlineconstexprnoexcept

Definition at line 35 of file cppvalue.h.

{ return m_type; }

References m_type.

Member Data Documentation

m_d

double CPPValue::m_d

private

Definition at line 53 of file cppvalue.h.

Referenced by CPPValue(), operator double(), operator long(), and print().

m_l

long CPPValue::m_l

private

Definition at line 54 of file cppvalue.h.

Referenced by CPPValue(), operator double(), operator long(), and print().

m_type

Type CPPValue::m_type

private

Definition at line 52 of file cppvalue.h.

Referenced by CPPValue(), operator double(), operator long(), print(), and type().

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The documentation for this class was generated from the following files:

• src/cppvalue.h
• src/cppvalue.cpp