Public Types
enum	operation_type { End = 0x00 , Addition = 0x01 , Subtraction = 0x02 , Multiplication = 0x03 , Division = 0x04 , IntegerRemainder = 0x05 , Negation = 0x06 , BitShift = 0x07 , And = 0x08 , Or = 0x09 , EOr = 0x0A , Not = 0x0B , LessOrEqualTo = 0x0C , GreaterOrEqualTo = 0x0D , NotEqual = 0x0E , LessThan = 0x0F , GreaterThan = 0x10 , EqualTo = 0x11 , BitAnd = 0x12 , BitOr = 0x13 , BitEOr = 0x14 , BitNot = 0x15 , LocationCounterOperand = 0x80 , ConstantOperand = 0x81 , WeakLabelReferenceOperand = 0x82 , LabelReferenceOperand = 0x83 , LengthOfLabelReferenceOperand = 0x84 , TypeOfLabelReferenceOperand = 0x85 , CountOfLabelReferenceOperand = 0x86 , RelativeOffsetOperand = 0x87 , StackUnderflow = -1 }
	Represents an operation inside an expression in the object file. More...

Public Member Functions
	Expression (int operation)

	Expression (int operation, std::unique_ptr< Expression > &operand)

	Expression (int operation, std::unique_ptr< Expression > &operand1, std::unique_ptr< Expression > &operand2)

	Expression (int operation, offset_t value)

	Expression (int operation, std::string value)

offset_t	GetLength (const Segment &segment) const

void	ReadFile (Segment &segment, Linker::Reader &rd)

void	WriteFile (const Segment &segment, Linker::Writer &wr) const

std::string	GetStandardNotation () const
	Converts expression into a C-like syntax.

Public Attributes
operation_type	operation = End
	The type of operation, End means that the result is the last operand.

std::vector< std::unique_ptr< Expression > >	operands
	The operands the operation takes.

std::optional< std::variant< offset_t, std::string > >	value
	A value corresponding to an operation, such as an integer constant or a label name.

Protected Types
typedef precedence::precedence_type	precedence_type

Protected Member Functions
void	PopElementsInto (size_t count, std::vector< std::unique_ptr< Expression > > &target)
	Removes elements from the top of the operands stack and copies them into target. On stack underflow, the missing elements are replaced with StackUnderflow expressions.

uint8_t	ReadSingleOperation (Segment &segment, Linker::Reader &rd)
	Reads a single byte of operation (plus optional number and label) and modifies the current list of operands as an operation acting on a stack.

void	GetStandardNotation (std::ostream &out, precedence_type precedence) const

Member Enumeration Documentation

◆ operation_type

Represents an operation inside an expression in the object file.

The numerical values are identical to the opcode bytes in the binary file

Enumerator
StackUnderflow	A symbolic value to represent a stack underflow condition, it should not be printed back into a binary.

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