Rename def to alias.

test/unit/stdlib/collections/bitset.c3

@@ -4,9 +4,9 @@ import std::collections::growablebitset;
 import std::collections::list;
 import std::io;
 
-def List = List{usz};
+alias List = List{usz};
 
-def BitSet = BitSet{2048};
+alias BitSet = BitSet{2048};
 
 fn void set_get()
 {
@@ -45,7 +45,7 @@ fn void set_get()
 	assert(bs.cardinality() == 0);
 }
 
-def GrowableBitSet = GrowableBitSet{char};
+alias GrowableBitSet = GrowableBitSet{char};
 fn void growable_set_get()
 {
 	GrowableBitSet bs;

test/unit/stdlib/collections/copy_map.c3

@@ -2,7 +2,7 @@ module test;
 import std::io;
 import std::collections::map;
 
-def IntMap = HashMap{String, int};
+alias IntMap = HashMap{String, int};
 fn void copy_map() @test
 {
 	TrackingAllocator alloc;

test/unit/stdlib/collections/elastic_array.c3

@@ -1,8 +1,8 @@
 module elastic_array_test @test;
 import std::collections::elastic_array;
 
-def IntList = ElasticArray{int, 10};
-def PtrList = ElasticArray{void*, 10};
+alias IntList = ElasticArray{int, 10};
+alias PtrList = ElasticArray{void*, 10};
 
 fn void delete_contains_index()
 {

test/unit/stdlib/collections/enummap.c3

@@ -8,7 +8,7 @@ enum FooEnum
     THREE,
 }
 
-def FooEnumMap = EnumMap{FooEnum, uint};
+alias FooEnumMap = EnumMap{FooEnum, uint};
 
 fn void enums()
 {

test/unit/stdlib/collections/linkedlist.c3

@@ -1,7 +1,7 @@
 module linkedlist_test @test;
 import std::collections::linkedlist;
 
-def IntList = LinkedList{int};
+alias IntList = LinkedList{int};
 
 fn void test_is_initialized()
 {

test/unit/stdlib/collections/list.c3

@@ -1,15 +1,15 @@
 module list_test @test;
 import std::collections::list;
 
-def IntList = List{int};
-def PtrList = List{void*};
+alias IntList = List{int};
+alias PtrList = List{void*};
 
 struct Overalign
 {
 	float[<4>] x @align(128);
 }
 
-def OveralignList = List{Overalign};
+alias OveralignList = List{Overalign};
 fn void overaligned_type()
 {
 	OveralignList l;

test/unit/stdlib/collections/map.c3

@@ -4,14 +4,14 @@ import std::collections::map;
 import std::sort;
 import std::io;
 
-def TestHashMap = HashMap{String, usz};
+alias TestHashMap = HashMap{String, usz};
 
 struct MapTest
 {
     String key;
     usz value;
 }
-def List = List{MapTest};
+alias List = List{MapTest};
 
 fn void map()
 {
@@ -55,7 +55,7 @@ fn void map()
     }
 }
 
-def FooMap = HashMap{char, Foobar};
+alias FooMap = HashMap{char, Foobar};
 enum Foobar : inline char
 {
     FOO,

test/unit/stdlib/collections/priorityqueue.c3

@@ -2,7 +2,7 @@ module priorityqueue_test @test;
 import std::collections;
 import std::collections::priorityqueue;
 
-def Queue = PriorityQueue{int};
+alias Queue = PriorityQueue{int};
 
 fn void priorityqueue()
 {
@@ -32,7 +32,7 @@ fn void priorityqueue()
     assert(x == 3, "got %d; want %d", x, 3);
 }
 
-def QueueMax = PriorityQueueMax{int};
+alias QueueMax = PriorityQueueMax{int};
 
 fn void priorityqueue_max()
 {

test/unit/stdlib/collections/range.c3

@@ -1,8 +1,8 @@
 module range_test @test;
 import std::collections::range;
 
-def IntRange = Range{int};
-def IntExRange = ExclusiveRange{int};
+alias IntRange = Range{int};
+alias IntExRange = ExclusiveRange{int};
 
 fn void test_range()
 {

test/unit/stdlib/collections/ringbuffer.c3

@@ -2,7 +2,7 @@ module ringbuffer_test @test;
 import std::collections::ringbuffer;
 import std::io;
 
-def Buffer = RingBuffer{char[4]};
+alias Buffer = RingBuffer{char[4]};
 
 fn void push_get()
 {