Nick Sabalausky wrote:
Alhough it wouldn't necessarily even need to be a full-fledged source
formatter. Just something to sanitize the whitespace between start-of-line
and anything non-whitespace would be a huge improvement *and* be
cross-language.
I think that's a great idea. Yesterday, I wrote the following program and added
it to the dmd makefile so that all checkins and installs run the source code
through it first. I welcome improvements. The current version replaces tabs with
spaces, and removes trailing whitespace.
If someone is ambitious, a full fletched D source code pretty printer would be
valuable that anyone could use, and which all Phobos source code could be run
through in order to enforce a common style.
----------------------------------------
/* Replace tabs with spaces, and remove trailing whitespace from lines.
*/
import std.file;
import std.path;
int main(string[] args)
{
foreach (f; args[1 .. $])
{
auto input = cast(char[]) std.file.read(f);
auto output = filter(input);
if (output != input)
std.file.write(f, output);
}
return 0;
}
char[] filter(char[] input)
{
char[] output;
size_t j;
int column;
for (size_t i = 0; i < input.length; i++)
{
auto c = input[i];
switch (c)
{
case '\t':
while ((column & 7) != 7)
{ output ~= ' ';
j++;
column++;
}
c = ' ';
column++;
break;
case '\r':
case '\n':
while (j && output[j - 1] == ' ')
j--;
output = output[0 .. j];
column = 0;
break;
default:
column++;
break;
}
output ~= c;
j++;
}
while (j && output[j - 1] == ' ')
j--;
return output[0 .. j];
}
