1a33838423
BREAKING CHANGE: This removes the irony and rtags packages so we can lean on LSP servers like clangd and ccls fully, which provide the same features with much more consistency. Close: #8049
258 lines
9.9 KiB
EmacsLisp
258 lines
9.9 KiB
EmacsLisp
;;; lang/cc/autoload.el -*- lexical-binding: t; -*-
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;;;###autoload
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(add-to-list 'auto-mode-alist '("\\.cl\\'" . opencl-mode))
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;; The plusses in c++-mode can be annoying to search for ivy/helm (which reads
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;; queries as regexps), so we add these for convenience.
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;;;###autoload (defalias 'cpp-mode 'c++-mode)
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;;;###autoload (defvaralias 'cpp-mode-map 'c++-mode-map)
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;;
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;; Library
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;;;###autoload
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(defun +cc-c++-lineup-inclass (langelem)
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"Indent inclass lines one level further than access modifier keywords."
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(and (eq major-mode 'c++-mode)
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(or (assoc 'access-label c-syntactic-context)
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(save-excursion
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(save-match-data
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(re-search-backward
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"\\(?:p\\(?:ublic\\|r\\(?:otected\\|ivate\\)\\)\\)"
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(c-langelem-pos langelem) t))))
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'++))
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;;;###autoload
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(defun +cc-lineup-arglist-close (langlem)
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"Line up the closing brace in an arglist with the opening brace IF cursor is
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preceded by the opening brace or a comma (disregarding whitespace in between)."
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(when (save-excursion
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(save-match-data
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(skip-chars-backward " \t\n" (c-langelem-pos langelem))
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(memq (char-before) (list ?, ?\( ?\;))))
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(c-lineup-arglist langlem)))
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(defun +cc--re-search-for (regexp)
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(save-excursion
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(save-restriction
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(save-match-data
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(widen)
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(goto-char (point-min))
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(re-search-forward regexp magic-mode-regexp-match-limit t)))))
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;;;###autoload
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(defun +cc-c-c++-objc-mode ()
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"Uses heuristics to detect `c-mode', `objc-mode' or `c++-mode'.
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1. Checks if there are nearby cpp/cc/m/mm files with the same name.
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2. Checks for ObjC and C++-specific keywords and libraries.
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3. Falls back to `+cc-default-header-file-mode', if set.
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4. Otherwise, activates `c-mode'.
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This is meant to replace `c-or-c++-mode' (introduced in Emacs 26.1), which
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doesn't support specification of the fallback mode and whose heuristics are
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simpler."
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(let ((base (file-name-sans-extension (buffer-file-name (buffer-base-buffer)))))
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(cond ((file-exists-p! (or (concat base ".cpp")
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(concat base ".cc")))
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(c++-mode))
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((or (file-exists-p! (or (concat base ".m")
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(concat base ".mm")))
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(+cc--re-search-for
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(concat "^[ \t\r]*\\(?:"
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"@\\(?:class\\|interface\\|property\\|end\\)\\_>"
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"\\|#import +<Foundation/Foundation.h>"
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"\\|[-+] ([a-zA-Z0-9_]+)"
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"\\)")))
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(objc-mode))
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((+cc--re-search-for
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(let ((id "[a-zA-Z0-9_]+") (ws "[ \t\r]+") (ws-maybe "[ \t\r]*"))
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(concat "^" ws-maybe "\\(?:"
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"using" ws "\\(?:namespace" ws "std;\\|std::\\)"
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"\\|" "namespace" "\\(?:" ws id "\\)?" ws-maybe "{"
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"\\|" "class" ws id ws-maybe "[:{\n]"
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"\\|" "template" ws-maybe "<.*>"
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"\\|" "#include" ws-maybe "<\\(?:string\\|iostream\\|map\\)>"
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"\\)")))
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(c++-mode))
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((functionp +cc-default-header-file-mode)
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(funcall +cc-default-header-file-mode))
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((c-mode)))))
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(defun +cc-resolve-include-paths ()
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(cl-loop with path = (or buffer-file-name default-directory)
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for dir in +cc-default-include-paths
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if (file-name-absolute-p dir)
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collect dir
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else if (projectile-locate-dominating-file path dir)
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collect (expand-file-name dir it)))
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;;
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;; Commands
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;; Eglot specific helper, courtesy of MaskRay
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;;;###autoload
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(defun +cc/eglot-ccls-show-inheritance-hierarchy (&optional derived)
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"Show inheritance hierarchy for the thing at point.
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If DERIVED is non-nil (interactively, with prefix argument), show
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the children of class at point."
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(interactive "P")
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(if-let* ((res (jsonrpc-request
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(eglot--current-server-or-lose)
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:$ccls/inheritance
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(append (eglot--TextDocumentPositionParams)
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`(:derived ,(if derived t :json-false))
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'(:levels 100) '(:hierarchy t))))
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(tree (list (cons 0 res))))
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(with-help-window "*ccls inheritance*"
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(with-current-buffer standard-output
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(while tree
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(pcase-let ((`(,depth . ,node) (pop tree)))
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(cl-destructuring-bind (&key uri range) (plist-get node :location)
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(insert (make-string depth ?\ ) (plist-get node :name) "\n")
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(make-text-button (+ (point-at-bol 0) depth) (point-at-eol 0)
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'action (lambda (_arg)
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(interactive)
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(find-file (eglot--uri-to-path uri))
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(goto-char (car (eglot--range-region range)))))
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(cl-loop for child across (plist-get node :children)
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do (push (cons (1+ depth) child) tree)))))))
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(eglot--error "Hierarchy unavailable")))
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;;;###autoload
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(defun +cc-cmake-lookup-documentation-fn (_)
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"Look up the symbol at point in CMake's documentation."
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(condition-case _
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(progn
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(save-window-excursion (cmake-help))
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(when-let (buf (get-buffer "*CMake Help*"))
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(pop-to-buffer buf)
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t))
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(error nil)))
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;;
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;; Hooks
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;;;###autoload
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(defun +cc-fontify-constants-h ()
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"Better fontification for preprocessor constants"
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(when (memq major-mode '(c-mode c++-mode))
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(font-lock-add-keywords
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nil '(("\\<[A-Z]*_[0-9A-Z_]+\\>" . font-lock-constant-face)
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("\\<[A-Z]\\{3,\\}\\>" . font-lock-constant-face))
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t)))
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(defvar +cc--project-includes-alist nil)
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;;;###autoload
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(defun +cc-init-ffap-integration-h ()
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"Takes the local project include paths and registers them with ffap.
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This way, `find-file-at-point' (and `+lookup/file') will know where to find most
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header files."
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(when-let (project-root (and (featurep 'lsp)
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(or (lsp-workspace-root)
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(doom-project-root))))
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(require 'ffap)
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(make-local-variable 'ffap-c-path)
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(make-local-variable 'ffap-c++-path)
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(cl-loop for dir in (or (cdr (assoc project-root +cc--project-includes-alist))
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(+cc-resolve-include-paths))
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do (add-to-list (pcase major-mode
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(`c-mode 'ffap-c-path)
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(`c++-mode 'ffap-c++-path))
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(expand-file-name dir project-root)))))
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;;
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;;; CCLS specific helpers
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;; ccls-show-vars ccls-show-base ccls-show-derived ccls-show-members have a
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;; parameter while others are interactive.
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;;
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;; (+cc/ccls-show-base 1) direct bases
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;; (+cc/ccls-show-derived 1) direct derived
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;; (+cc/ccls-show-member 2) => 2 (Type) => nested classes / types in a namespace
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;; (+cc/ccls-show-member 3) => 3 (Func) => member functions / functions in a namespace
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;; (+cc/ccls-show-member 0) => member variables / variables in a namespace
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;; (+cc/ccls-show-vars 1) => field
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;; (+cc/ccls-show-vars 2) => local variable
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;; (+cc/ccls-show-vars 3) => field or local variable. 3 = 1 | 2
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;; (+cc/ccls-show-vars 4) => parameter
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;;;###autoload
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(defun +cc/ccls-show-callee ()
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"Show callees of symbol under point."
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(interactive)
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(lsp-ui-peek-find-custom "$ccls/call" '(:callee t)))
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;;;###autoload
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(defun +cc/ccls-show-caller ()
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"Show callers of symbol under point."
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(interactive)
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(lsp-ui-peek-find-custom "$ccls/call"))
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;;;###autoload
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(defun +cc/ccls-show-vars (kind)
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"Show variables of type KIND as symbol under point.
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1 -> field
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2 -> local variable
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3 -> field or local variables. 3 = 1 | 2.
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4 -> parameter"
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(lsp-ui-peek-find-custom "$ccls/vars" `(:kind ,kind)))
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;;;###autoload
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(defun +cc/ccls-show-base (levels)
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"Show bases of class under point up to LEVELS levels (1 for direct bases)."
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(lsp-ui-peek-find-custom "$ccls/inheritance" `(:levels ,levels)))
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;;;###autoload
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(defun +cc/ccls-show-derived (levels)
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"Show derived classes from class under point down to LEVELS levels (1 for direct derived)."
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(lsp-ui-peek-find-custom "$ccls/inheritance" `(:levels ,levels :derived t)))
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;;;###autoload
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(defun +cc/ccls-show-member (kind)
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"Show member elements of kind KIND for class/namespace under point.
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0 -> member variables/ variables in a namespace
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2 -> nested classes / types in a namespace
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3 -> member functions / functions in a namespace"
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(lsp-ui-peek-find-custom "$ccls/member" `(:kind ,kind)))
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;; The meaning of :role corresponds to https://github.com/maskray/ccls/blob/master/src/symbol.h
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;;;###autoload
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(defun +cc/ccls-show-references-address ()
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"References w/ Role::Address bit (e.g. variables explicitly being taken addresses)"
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(interactive)
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(lsp-ui-peek-find-custom "textDocument/references"
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(plist-put (lsp--text-document-position-params) :role 128)))
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;;;###autoload
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(defun +cc/ccls-show-references-macro ()
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"References w/ Role::Dynamic bit (macro expansions)"
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(interactive)
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(lsp-ui-peek-find-custom "textDocument/references"
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(plist-put (lsp--text-document-position-params) :role 64)))
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;;;###autoload
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(defun +cc/ccls-show-references-not-call ()
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"References w/o Role::Call bit (e.g. where functions are taken addresses)"
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(interactive)
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(lsp-ui-peek-find-custom "textDocument/references"
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(plist-put (lsp--text-document-position-params) :excludeRole 32)))
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;;;###autoload
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(defun +cc/ccls-show-references-read ()
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"References w/ Role::Read"
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(interactive)
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(lsp-ui-peek-find-custom "textDocument/references"
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(plist-put (lsp--text-document-position-params) :role 8)))
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;;;###autoload
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(defun +cc/ccls-show-references-write ()
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"References w/ Role::Write"
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(interactive)
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(lsp-ui-peek-find-custom "textDocument/references"
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(plist-put (lsp--text-document-position-params) :role 16)))
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