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    <h1>Comments</h1> <p>I think <b>part of</b> the problem you experience is that when you instantiate templates, emacs CC mode views it with the same <code>template-args-cont</code> structure. So, taking this into account, I expanded on your original idea and tried to make it suit my liking; I made the code verbose so that hopefully everyone can understand my intention. :) This should not cause problems when you instantiate, and it also appears to work for template template parameters! Try this out until someone with more Elisp skills can provide a better solution!</p> <p>If you experience any 'fighting' (i.e. alternating or broken indentation), try reloading the cpp file <kbd>C-x</kbd><kbd>C-v</kbd><kbd>Enter</kbd> and indenting again. Sometimes with template template parameters emacs shows the inner arguments as <code>arglist-cont-nonempty</code> and even alternates back and forth with <code>template-args-const</code>, but the reload always restored state.</p> <h1> Usage </h1> <p>To do what you want try this out by using the code below and adding to your <code>c-offsets-alist</code> an entry:</p> <p><code>(template-args-cont . brian-c-lineup-template-args)</code></p> <p>and set the variable </p> <pre><code>(setq brian-c-lineup-template-closebracket t) </code></pre> <p>I actually prefer a slightly different alignment:</p> <pre><code>(setq brian-c-lineup-template-closebracket 'under) </code></pre> <h1>Code</h1> <pre><code>(defvar brian-c-lineup-template-closebracket 'under "Control the indentation of the closing template bracket, &gt;. Possible values and consequences: 'under : Align directly under (same column) the opening bracket. t : Align at the beginning of the line (or current indentation level. nil : Align at the same column of previous types (e.g. col of class T).") (defun brian-c-lineup-template--closebracket-p () "Return t if the line contains only a template close bracket, &gt;." (save-excursion (beginning-of-line) ;; Check if this line is empty except for the trailing bracket, &gt; (looking-at (rx (zero-or-more blank) "&gt;" (zero-or-more blank))))) (defun brian-c-lineup-template--pos-to-col (pos) (save-excursion (goto-char pos) (current-column))) (defun brian-c-lineup-template--calc-open-bracket-pos (langelem) "Calculate the position of a template declaration opening bracket via LANGELEM." (save-excursion (c-with-syntax-table c++-template-syntax-table (goto-char (c-langelem-pos langelem)) (1- (re-search-forward "&lt;" (point-max) 'move))))) (defun brian-c-lineup-template--calc-indent-offset (ob-pos) "Calculate the indentation offset for lining up types given the opening bracket position, OB-POS." (save-excursion (c-with-syntax-table c++-template-syntax-table ;; Move past the opening bracket, and check for types (basically not space) ;; if types are on the same line, use their starting column for indentation. (goto-char (1+ ob-pos)) (cond ((re-search-forward (rx (or "class" "typename" (one-or-more (not blank)))) (c-point 'eol) 'move) (goto-char (match-beginning 0)) (current-column)) (t (back-to-indentation) (+ c-basic-offset (current-column))))))) (defun brian-c-lineup-template-args (langelem) "Align template arguments and the closing bracket in a semi-custom manner." (let* ((ob-pos (brian-c-lineup-template--calc-open-bracket-pos langelem)) (ob-col (brian-c-lineup-template--pos-to-col ob-pos)) (offset (brian-c-lineup-template--calc-indent-offset ob-pos))) ;; Optional check for a line consisting of only a closebracket and ;; line it up either at the start of indentation, or underneath the ;; column of the opening bracket (cond ((and brian-c-lineup-template-closebracket (brian-c-lineup-template--closebracket-p)) (cond ((eq brian-c-lineup-template-closebracket 'under) (vector ob-col)) (t 0))) (t (vector offset))))) </code></pre>
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    1. COWow, thanks for this. I'll give it a try over the weekend if I have some time (in the process of moving houses.)
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