`class ExpansionLocation`

Represents the expansion location of a macro. This provides the location where a macro was expanded, including file, line, column, and byte offset.

Definitions

`attr_reader :file, :line, :column, :offset`

Signature

attribute　r

file

returns　String: The file path.

attribute　r

line

returns　Integer: The line number.

attribute　r

column

returns　Integer: The column number.

attribute　r

offset

returns　Integer: The byte offset in the file.

`def initialize(location)`

Create a new expansion location and extract its components.

Signature

parameter　location　FFI::Pointer: The low-level location handle.

Implementation

def initialize(location)
	super(location)
	
	cxfile = MemoryPointer.new :pointer
	line   = MemoryPointer.new :uint
	column = MemoryPointer.new :uint
	offset = MemoryPointer.new :uint
	
	Lib::get_expansion_location(@location, cxfile, line, column, offset)
	
	@file = Lib.extract_string Lib.get_file_name(cxfile.read_pointer)
	@line = line.get_uint(0)
	@column = column.get_uint(0)
	@offset = offset.get_uint(0)
end

`def as_string`

Get a string representation of this location.

Signature

returns　String: The location in format "file:line:column:offset".

Implementation

def as_string
	"#{@file}:#{@line}:#{@column}:#{@offset}"
end

`def to_s`

Get a detailed string representation.

Signature

returns　String: A string describing this expansion location.

Implementation

def to_s
	"ExpansionLocation <#{self.as_string}>"
end