A LogicalFile is a facade that appears to be a contiguous file of lines of text but which is actually composed of sections that may come from different backing text files.
The LogicalFile preserves the mapping of a logical line to the section and local line number that the line is provided by.
LogicalFile provides functions for modifying & updating the text while preserving the backing structure. For example it supports inserting a new file within the LogicalFile.
LogicalFile supports a system of Macros to process the text and includes sample implementations of a line-comment and include macro.
An example use case is a compiler for a language with support for including one source file from another. The LogicalFile represents the entire source to be compiled while preserving the relationship to the indivdual source files to faciliate error reporting.
If available in Hex, the package can be installed
by adding logical_file to your list of dependencies in mix.exs:
def deps do
[
{:logical_file, "~> 1.0.0"}
]
endalias LogicalFile
file =
LogicalFile.read("lib", "foo.src")
|> LogicalFile.insert("bar.src", 25))Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/logical_file.