ddemangle.d

import std.stdio; 
import core.demangle; 

void main() 
{ 
 foreach (line; stdin.byLine()) 
 { 
  size_t beginIdx, endIdx; 

  enum State { searching_, searchingD, searchingEnd, done } 
  State state; 
  foreach (i, char c; line) 
  { 
   switch (state) 
   { 
   case State.searching_: 
    if (c == '_') 
    { 
     beginIdx = i; 
     state = State.searchingD; 
    } 
    break; 
   case State.searchingD: 
    if (c == 'D') 
     state = State.searchingEnd; 
    else if (c != '_') 
     state = State.searching_; 
    break; 
   case State.searchingEnd: 
    if (c == ' ' || c == '"' || c == '\'') 
    { 
     endIdx = i; 
     state = State.done; 
    } 
    break; 
   } 
   if (state == State.done) 
    break; 
  } 

  if (endIdx > beginIdx) 
   writeln(line[0..beginIdx], demangle(line[beginIdx..endIdx]), 
line[endIdx..$]); 
  else 
   writeln(line); 
 } 
}