102 lines
4.0 KiB
EmacsLisp
Executable File
102 lines
4.0 KiB
EmacsLisp
Executable File
;;; undar-mode.el --- Major mode for editing Undar code -*- lexical-binding: t; -*-
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;; Copyright (C) 2025 zongor
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;;
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;; This program is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <https://www.gnu.org/licenses/>.
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;;;
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(defvar undar-keywords
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'("function" "to" "in" "is" "as" "use" "if" "else" "default"
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"for" "try" "catch" "while" "do" "exit" "switch" "continue"
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"return" "const" "type" "this" "yield" "case" "loop" "plex"
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"assert" "break" "mod" "not" "and" "or" "print" "ref" "interface"
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"implements" "impls" "band" "bor" "bxor" "srl" "sll")
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"Keywords in Undar.")
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(defvar undar-types
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'("byte" "str" "real" "bool"
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"int" "nat" "f32" "void"
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"u8" "u16" "u32"
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"i8" "i16" "i32")
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"Types in Undar.")
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(defvar undar-constants
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'("true" "false" "nil")
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"Constants in Undar.")
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(defvar undar-font-lock-keywords
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`(
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;; Keywords
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(,(regexp-opt undar-keywords 'words) . font-lock-keyword-face)
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;; Types
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(,(regexp-opt undar-types 'words) . font-lock-type-face)
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;; Constants
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(,(regexp-opt undar-constants 'words) . font-lock-constant-face)
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;; Structs: CamelCase identifiers
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("\\b[A-Z][a-zA-Z0-9_]*\\b" . font-lock-type-face)
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;; Function definitions: "function name(...)"
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("\\_<function\\>\\s-+\\([\\w+\\)(" (1 font-lock-function-name-face))
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;; Numbers (Integers and Floats)
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("\\b-?[0-9]+\\(?:\\.[0-9]+\\)?\\(?:[eE][+-]?[0-9]+\\)?\\b" . font-lock-constant-face)
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;; Strings with double quotes
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("\"[^\"\n]*\"" . font-lock-string-face)
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;; Strings with backticks
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("`[^`\n]*`" . font-lock-string-face))
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"Font lock keywords for Undar mode.")
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(defvar undar-mode-syntax-table
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(let ((st (make-syntax-table)))
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;; C-style comments: // and /* */
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;; Clear potential existing syntax for / and * if needed (though default is usually fine initially)
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;; Clearing standard C++/C comment syntax if it was somehow set beforehand is generally not needed
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;; unless explicitly overridden elsewhere, so we rely on the default being clean.
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;; The crucial setup for both // and /* */ comments together:
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;; / is punctuation and starts both // (1, 2) and /* (4) comments
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(modify-syntax-entry ?\/ ". 124" st)
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;; * is punctuation and part of /* */ (2, 3) and also part of // (b) comments (this is key for //)
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(modify-syntax-entry ?* ". 23b" st)
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;; Newline ends comments (>) and is part of // comments (b) - essential for // to end correctly
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(modify-syntax-entry ?\n ">" st)
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;; Strings
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(modify-syntax-entry ?\" "\"" st)
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(modify-syntax-entry ?` "\"" st)
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st)
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"Syntax table for Undar mode, using C-style comments (// and /* */).")
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(define-derived-mode undar-mode prog-mode "Undâr"
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"Major mode for editing Undar code."
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:syntax-table undar-mode-syntax-table
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(setq-local font-lock-defaults '(undar-font-lock-keywords))
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;; Set comment syntax for commands like M-; (comment-dwim)
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(setq-local comment-start "// ")
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(setq-local comment-end "")
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(setq-local comment-start-skip "\\(//+\\|/\\*+\\)\\s *")
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;; Ensure comments are ignored during parsing (e.g., for indentation)
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(setq-local parse-sexp-ignore-comments t)
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;; Use C-style indentation function
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(setq-local indent-line-function 'c-indent-line))
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;;;###autoload
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(add-to-list 'auto-mode-alist '("\\.ul\\'" . undar-mode))
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(provide 'undar-mode)
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;;; undar-mode.el ends here
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