208 lines
6.8 KiB
EmacsLisp
208 lines
6.8 KiB
EmacsLisp
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;;; ob-rust.el --- org-babel functions for rust
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;; Author: Philip Munksgaard
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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;;; Commentary:
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;; Org-Babel support for evaluating rust code.
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;;
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;; This is simply an adaptation of ob-C.el that instead targets rust code.
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;; Thanks to the original creators Eric Schulte and Thierry Banel
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;;
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;; Very limited implementation:
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;; - currently only support :results output
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;; - not much in the way of error feedback
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;;; Code:
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(eval-when-compile
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(require 'cl))
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(require 'ob)
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(require 'cc-mode)
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(declare-function org-entry-get "org"
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(pom property &optional inherit literal-nil))
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(defvar org-babel-tangle-lang-exts)
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(add-to-list 'org-babel-tangle-lang-exts '("rust"))
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(defvar org-babel-default-header-args:rust '())
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(defvar org-babel-rust-compiler "rustc"
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"Command used to compile a rust source code file into an
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executable.")
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(defun org-babel-expand-body:rust (body params)
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(org-babel-rust-expand body params))
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(defun org-babel-execute:rust (body params)
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"Execute a block of rust code with org-babel.
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This function is called by `org-babel-execute-src-block'."
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(print body)
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(princ params)
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(let* ((tmp-src-file (org-babel-temp-file
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"rust-src-"
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".rs"))
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(tmp-bin-file (org-babel-temp-file "rust-bin-" org-babel-exeext))
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(cmdline (cdr (assoc :cmdline params)))
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(flags (cdr (assoc :flags params)))
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(full-body (org-babel-rust-expand body params))
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(compile
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(progn
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(with-temp-file tmp-src-file (insert full-body))
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(org-babel-eval
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(format "%s -o %s %s %s"
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org-babel-rust-compiler
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(org-babel-process-file-name tmp-bin-file)
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(mapconcat 'identity
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(if (listp flags) flags (list flags)) " ")
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(org-babel-process-file-name tmp-src-file)) ""))))
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(let ((results
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(org-babel-trim
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(org-babel-eval
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(concat tmp-bin-file (if cmdline (concat " " cmdline) "")) ""))))
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(org-babel-reassemble-table
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(org-babel-result-cond (cdr (assoc :result-params params))
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(org-babel-read results)
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(let ((tmp-file (org-babel-temp-file "rust-")))
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(with-temp-file tmp-file (insert results))
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(org-babel-import-elisp-from-file tmp-file)))
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(org-babel-pick-name
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(cdr (assoc :colname-names params)) (cdr (assoc :colnames params)))
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(org-babel-pick-name
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(cdr (assoc :rowname-names params)) (cdr (assoc :rownames params)))))
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))
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(defun org-babel-rust-expand (body params)
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"Expand a block of rust code with org-babel."
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(print params)
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(print body)
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(let ((vars (mapcar #'cdr (org-babel-get-header params :var)))
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(main-p (not (string= (cdr (assoc :main params)) "no")))
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(uses (or (cdr (assoc :uses params))
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(org-babel-read (org-entry-get nil "uses" t))))
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(externs (org-babel-read
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(or (cdr (assoc :externs params))
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(org-babel-read (org-entry-get nil "externs" t)))))
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(attributes (org-babel-read
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(or (cdr (assoc :attributes params))
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(org-babel-read (org-entry-get nil "attributes" t))))))
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(mapconcat 'identity
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(list
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;; attributes
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(mapconcat
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(lambda (attr) (format "#[%s]" attr))
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(if (listp attributes) attributes (list attributes)) "\n")
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;; externs
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(mapconcat
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(lambda (ext) (format "extern crate %s;" ext))
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(if (listp externs) externs (list externs)) "\n")
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;; uses
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(mapconcat
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(lambda (use) (format "use %s;" use))
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(if (listp uses) uses (list uses)) "\n")
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;; variables
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(mapconcat 'org-babel-rust-var-to-rust vars "\n")
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;; body
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(if main-p
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(org-babel-rust-ensure-main-wrap body)
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body) "\n") "\n")))
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(defun org-babel-rust-ensure-main-wrap (body)
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"Wrap BODY in a \"main\" function call if none exists."
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(if (string-match "[ \t]*fn+[ \t\n\r]*main[ \t]*(.*)" body)
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body
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(format "fn main() {\n%s\n}\n" body)))
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(defun org-babel-prep-session:rust (session params)
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"This function does nothing as rust is a compiled language with no
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support for sessions"
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(error "rust is a compiled languages -- no support for sessions"))
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(defun org-babel-load-session:rust (session body params)
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"This function does nothing as rust is a compiled language with no
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support for sessions"
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(error "rust is a compiled languages -- no support for sessions"))
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;; helper functions
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(defun org-babel-rust-format-val (type val)
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"Handle the FORMAT part of TYPE with the data from VAL."
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(let ((format-data (cadr type)))
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(if (stringp format-data)
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(cons "" (format format-data val))
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(funcall format-data val))))
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(defun org-babel-rust-val-to-rust-type (val)
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"Determine the type of VAL.
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Return a list (TYPE-NAME FORMAT). TYPE-NAME should be the name of the type.
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FORMAT can be either a format string or a function which is called with VAL."
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(cond
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((integerp val) '("int" "%d"))
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((floatp val) '("f64" "%f"))
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((or (listp val) (vectorp val))
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(lexical-let ((type (org-babel-rust-val-to-rust-list-type val)))
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(list (concat "&'static [" (car type) "]")
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(lambda (val)
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(cons
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(format "[%d]%s"
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(length val)
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(car (org-babel-rust-format-val type (elt val 0))))
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(concat "&["
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(mapconcat (lambda (v)
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(cdr (org-babel-rust-format-val type v)))
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val
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", ")
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"]"))))))
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(t ;; treat unknown types as string
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'("&'static str" (lambda (val)
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(let ((s (format "%s" val))) ;; convert to string for unknown types
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(cons (format "[%d]" (1+ (length s)))
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(concat "\"" s "\""))))))))
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(defun org-babel-rust-val-to-rust-list-type (val)
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"Determine the rust array type of a VAL."
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(let (type)
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(mapc
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#'(lambda (i)
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(let* ((tmp-type (org-babel-rust-val-to-rust-type i))
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(type-name (car type))
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(tmp-type-name (car tmp-type)))
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(when (and type (not (string= type-name tmp-type-name)))
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(if (and (member type-name '("int" "f64"))
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(member tmp-type-name '("int" "f64")))
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(setq tmp-type '("f64" "" "%f"))
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(error "Only homogeneous lists are supported by rust. You can not mix %s and %s"
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type-name
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tmp-type-name)))
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(setq type tmp-type)))
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val)
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type))
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(defun org-babel-rust-var-to-rust (pair)
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"Convert an elisp val into a string of rust code specifying a var
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of the same value."
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;; TODO list support
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(let ((var (car pair))
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(val (cdr pair)))
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(when (symbolp val)
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(setq val (symbol-name val))
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(when (= (length val) 1)
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(setq val (string-to-char val))))
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(let* ((type-data (org-babel-rust-val-to-rust-type val))
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(type (car type-data))
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(formated (org-babel-rust-format-val type-data val))
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;; (suffix (car formated))
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(data (cdr formated)))
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(format "static %s: %s = %s;"
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var
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type
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;suffix
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data))))
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(provide 'ob-rust)
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;;; ob-rust.el ends here
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