mutable decl syntax change

examples/programs/yield/main.bro

@@ -19,7 +19,7 @@ basic func() i32 {
 
 # Typed `T =`: the yield coerces to the annotation.
 typed func() i64 {
-	x i64 = {
+	x i64 := {
 		yield 100
 	}
 	return x
@@ -29,7 +29,7 @@ typed func() i64 {
 # local, but the captured value is unchanged.
 spill func() i32 {
 	v :: {
-		n i32 = 5
+		n i32 := 5
 		defer n = 999
 		yield n
 	}
@@ -38,7 +38,7 @@ spill func() i32 {
 
 # Reassignment into an existing mutable local.
 reassign func() i32 {
-	r i32 = 0
+	r i32 := 0
 	r = {
 		yield 7
 	}
@@ -61,13 +61,13 @@ vif_untyped func(sel i32) i32 {
 
 # Typed `T =`: every branch coerces to the annotation.
 vif_typed func(sel i32) i32 {
-	r i32 = if (sel == 0) { yield 100 } else { yield 200 }
+	r i32 := if (sel == 0) { yield 100 } else { yield 200 }
 	return r
 }
 
 # Assigned into an existing local.
 vif_reassign func(sel i32) i32 {
-	r i32 = 0
+	r i32 := 0
 	r = if (sel == 0) { yield 7 } else { yield 9 }
 	return r
 }
@@ -76,7 +76,7 @@ vif_reassign func(sel i32) i32 {
 # the yield.
 vif_defer func() i32 {
 	r :: if (true) {
-		n i32 = 5
+		n i32 := 5
 		defer n = 999
 		yield n
 	} else {
@@ -123,7 +123,7 @@ loop_none func() i32 {
 
 # Labeled `while` value loop (label follows the `: update` clause).
 loop_while func() i32 {
-	n i32 = 0
+	n i32 := 0
 	found :: while n < 100 : n += 1 blk: {
 		if (n == 8) yield :blk n
 		yield null
@@ -199,7 +199,7 @@ lblock func(sel i32) i32 {
 # the block's defer runs.
 lblock_defer func() i32 {
 	r :: blk: {
-		n i32 = 5
+		n i32 := 5
 		defer n = 999
 		if (true) yield :blk n
 		yield :blk 0
@@ -235,7 +235,7 @@ yield_outer func(target i32) i32 {
 
 # Plain `break :outer` exits an outer loop from an inner loop.
 break_outer func() i32 {
-	count i32 = 0
+	count i32 := 0
 	for 0..3 |a| outer: {
 		for 0..3 |b| {
 			count += 1
@@ -247,7 +247,7 @@ break_outer func() i32 {
 
 # A labeled block *statement* (not a value source): `break :blk` exits it early.
 stmt_block func(early i32) i32 {
-	x i32 = 0
+	x i32 := 0
 	blk: {
 		x = 1
 		if (early == 1) break :blk
@@ -259,7 +259,7 @@ stmt_block func(early i32) i32 {
 # `break :search` escapes a nested loop and the block in one jump; the block's
 # defer still runs on the way out.
 stmt_block_escape func() i32 {
-	hits i32 = 0
+	hits i32 := 0
 	search: {
 		defer hits += 1000
 		for 0..10 |i| {
@@ -273,7 +273,7 @@ stmt_block_escape func() i32 {
 
 # A labeled block can also be exited through an ordinary nested block.
 stmt_block_nested func() i32 {
-	hits i32 = 0
+	hits i32 := 0
 	outer: {
 		{
 			hits = 1