<p>In <a href="https://github.com/geany/geany/pull/1176#discussion_r74563977">src/editor.c</a>:</p>
<pre style='color:#555'>> +
> +  line = sci_get_line_from_position(sci, pos);
> +  line_start = sci_get_position_from_line(sci, line);
> +  startword = pos - line_start;
> +  endword = pos - line_start;
> +
> +  word[0] = '\0';
> +  chunk = sci_get_line(sci, line);
> +
> +  const char *punctuation = ":.";
> +  if (wc == NULL)
> +          wc = GEANY_WORDCHARS;
> +          
> +  // first, loop backwards until punctuation ScopeA::ScopeB::Function
> +  //                                                        ^
> +  while (endword > 0 && (strchr(wc, chunk[endword - 1]) || ! IS_ASCII(chunk[endword - 1])))
</pre>
<p>strictly there can be whitespace like <code>scopea :: scopeb ::</code> in some languages</p>

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