demangle

// int b in module a
assert(demangle("_D1a1bi") == "int a.b");
// char array foo in module test
assert(demangle("_D4test3fooAa") == "char[] test.foo");

1 import std.ascii : isAlphaNum;
2 import std.algorithm.iteration : chunkBy, joiner, map;
3 import std.algorithm.mutation : copy;
4 import std.conv : to;
5 import std.demangle : demangle;
6 import std.functional : pipe;
7 import std.stdio : stdin, stdout;
8 
9 void main()
10 {
11     stdin.byLineCopy
12         .map!(
13             l => l.chunkBy!(a => isAlphaNum(a) || a == '_')
14                   .map!(a => a[1].pipe!(to!string, demangle)).joiner
15         )
16         .copy(stdout.lockingTextWriter);
17 }