diff --git a/lib/std/collections/enummap.c3 b/lib/std/collections/enummap.c3
index 59239a1a4..b6adf1c40 100644
--- a/lib/std/collections/enummap.c3
+++ b/lib/std/collections/enummap.c3
@@ -13,6 +13,23 @@ fn void EnumMap.init(EnumMap* this, ValueType init_value)
     }
 }
 
+
+fn void! EnumMap.to_format(EnumMap* map, Formatter* formatter) @dynamic
+{
+	formatter.print("{ ")!;
+	foreach (i, &value : map.values)
+	{
+		if (i != 0) formatter.print(", ")!;
+		formatter.printf("%s: %s", (Enum)i, *value)!;
+	}
+	formatter.print(" }")!;
+}
+
+fn String EnumMap.to_string(EnumMap* map, Allocator* using = mem::heap()) @dynamic
+{
+	return string::printf("%s", *map);
+}
+
 fn uint EnumMap.len(EnumMap* this) @operator(len) => this.values.len;
 fn ValueType EnumMap.get(EnumMap* this, Enum key) @operator([]) => this.values[key.ordinal];
 fn void EnumMap.set(EnumMap* this, Enum key, ValueType value) @operator([]=) => this.values[key.ordinal] = value;
diff --git a/lib/std/collections/enumset.c3 b/lib/std/collections/enumset.c3
index 7638cf546..9b3ee5730 100644
--- a/lib/std/collections/enumset.c3
+++ b/lib/std/collections/enumset.c3
@@ -12,7 +12,6 @@ def EnumSetType = $typefrom(private::type_for_enum_elements(Enum.elements)) @pri
 const IS_CHAR_ARRAY = Enum.elements > 128;
 def EnumSet = distinct EnumSetType;
 
-
 fn void EnumSet.add(EnumSet* this, Enum v)
 {
 	$if IS_CHAR_ARRAY:
@@ -126,6 +125,25 @@ fn EnumSet EnumSet.xor_of(EnumSet* this, EnumSet s)
 	$endif
 }
 
+fn void! EnumSet.to_format(EnumSet* set, Formatter* formatter) @dynamic
+{
+	formatter.print("[")!;
+	bool found = false;
+	foreach (value : Enum.values)
+	{
+		if (!set.has(value)) continue;
+		if (found) formatter.print(", ")!;
+		found = true;
+		formatter.printf("%s", value)!;
+	}
+	formatter.print("]")!;
+}
+
+fn String EnumSet.to_string(EnumSet* set, Allocator* using = mem::heap()) @dynamic
+{
+	return string::printf("%s", *set);
+}
+
 module std::collections::enumset::private;
 
 macro typeid type_for_enum_elements(usz $elements)
diff --git a/lib/std/collections/map.c3 b/lib/std/collections/map.c3
index 3aa9d544b..4435007db 100644
--- a/lib/std/collections/map.c3
+++ b/lib/std/collections/map.c3
@@ -195,6 +195,8 @@ fn Key[] HashMap.key_list(HashMap* map, Allocator* using = mem::heap())
 	return list;
 }
 
+
+
 fn Value[] HashMap.value_tlist(HashMap* map)
 {
 	return map.value_list(mem::temp()) @inline;
diff --git a/lib/std/collections/priorityqueue.c3 b/lib/std/collections/priorityqueue.c3
index c27b3da9e..63a474fe9 100644
--- a/lib/std/collections/priorityqueue.c3
+++ b/lib/std/collections/priorityqueue.c3
@@ -111,3 +111,13 @@ fn Type PriorityQueue.peek_at(PriorityQueue* pq, usz index) @operator([])
 {
 	return pq.heap[index];
 }
+
+fn void! PriorityQueue.to_format(PriorityQueue* list, Formatter* formatter) @dynamic
+{
+	return list.heap.to_format(formatter);
+}
+
+fn String PriorityQueue.to_string(PriorityQueue* list, Allocator* using = mem::heap()) @dynamic
+{
+	return list.heap.to_string(formatter);
+}
diff --git a/lib/std/collections/range.c3 b/lib/std/collections/range.c3
index f9bdbc23e..0e1b48036 100644
--- a/lib/std/collections/range.c3
+++ b/lib/std/collections/range.c3
@@ -24,6 +24,16 @@ fn Type Range.get(Range* range, usz index) @operator([])
     return range.start + (Type)index;
 }
 
+fn String Range.to_string(Range* list, Allocator* using = mem::heap()) @dynamic
+{
+	return string::printf("[%s..%s]", list.start, list.end);
+}
+
+fn void! Range.to_format(Range* list, Formatter* formatter) @dynamic
+{
+	formatter.printf("[%s..%s]", list.start, list.end)!;
+}
+
 struct ExclusiveRange
 {
 	Type start;
@@ -36,6 +46,16 @@ fn usz ExclusiveRange.len(ExclusiveRange* range) @operator(len)
 	return (usz)(range.end - range.start);
 }
 
+fn void! ExclusiveRange.to_format(ExclusiveRange* list, Formatter* formatter) @dynamic
+{
+	formatter.printf("[%s..<%s]", list.start, list.end)!;
+}
+
+fn String ExclusiveRange.to_string(ExclusiveRange* list, Allocator* using = mem::heap()) @dynamic
+{
+	return string::printf("[%s..<%s]", list.start, list.end);
+}
+
 /**
  * @require index < range.len() : "Can't index into an empty range"
  **/
diff --git a/test/unit/stdlib/collections/range.c3 b/test/unit/stdlib/collections/range.c3
index 2054dc405..d05961186 100644
--- a/test/unit/stdlib/collections/range.c3
+++ b/test/unit/stdlib/collections/range.c3
@@ -26,4 +26,5 @@ fn void! test_range()
 		sum += z * z;
 	}
 	assert(sum == 35);
-}
\ No newline at end of file
+}
+