Module connections 

Connection object builtins — file connections, stdin/stdout/stderr, TCP sockets.

R connections wrap file handles (or other I/O sources) behind integer IDs. This module provides: file(), open(), close(), isOpen(), readLines()/writeLines() connection dispatch, the three standard stream constructors stdin(), stdout(), stderr(), and TCP client socket builtins: make.socket(), read.socket(), write.socket(), close.socket().

Connection metadata lives on the Interpreter struct as a Vec<ConnectionInfo>. Slots 0-2 are pre-allocated for stdin, stdout, and stderr.

TCP streams (std::net::TcpStream) are not Clone, so they are stored separately in a HashMap<usize, TcpStream> keyed by connection ID.

Structs

ConnectionInfo

Describes a single connection slot in the interpreter.

Enums

ConnectionKind

Discriminates what kind of I/O backing a connection has.

Statics

__INTERP_REG_INTERP_CLOSE 🔒

__INTERP_REG_INTERP_CLOSE_SOCKET 🔒

__INTERP_REG_INTERP_FILE 🔒

__INTERP_REG_INTERP_IS_OPEN 🔒

__INTERP_REG_INTERP_MAKE_SOCKET 🔒

__INTERP_REG_INTERP_OPEN 🔒

__INTERP_REG_INTERP_READ_LINES 🔒

__INTERP_REG_INTERP_READ_SOCKET 🔒

__INTERP_REG_INTERP_STDERR 🔒

__INTERP_REG_INTERP_STDIN 🔒

__INTERP_REG_INTERP_STDOUT 🔒

__INTERP_REG_INTERP_WRITE_LINES 🔒

__INTERP_REG_INTERP_WRITE_SOCKET 🔒

Functions

connection_id 🔒

Extract a connection ID from an argument that is either an integer (possibly with class “connection”) or a double that can be losslessly converted.

connection_value 🔒

Build an integer scalar with class "connection" representing connection id.

interp_close 🔒

Close a connection or progress bar.

interp_close_socket 🔒

Close a TCP socket connection.

interp_file 🔒

Create a file connection.

interp_is_open 🔒

Test whether a connection is open.

interp_make_socket 🔒

Create a TCP client socket connection.

interp_open 🔒

Open a connection.

interp_read_lines 🔒

Read text lines from a file path or a connection.

interp_read_socket 🔒

Read up to maxlen bytes from a TCP socket connection.

interp_stderr 🔒

Return connection 2 (standard error).

interp_stdin 🔒

Return connection 0 (standard input).

interp_stdout 🔒

Return connection 1 (standard output).

interp_write_lines 🔒

Write text lines to a file path, connection, or stdout.

interp_write_socket 🔒

Write a string to a TCP socket connection.

is_connection 🔒

Returns true if val carries the "connection" class attribute.

resolved_path_string 🔒