Implement closures

@@ -197,2 +197,4 @@
 		_ = writer;
 		_ = value;
+
+		return null;

@@ -573,6 +650,7 @@ pub const RuntimeEnv = struct {
 				break: convert self.new_string(string[0 .. length.?]);
 			},
 
+			.boxed => unreachable,

@@ -757,6 +861,8 @@ pub const RuntimeRef = opaque {
 				else => false,
 			},
 
+			.boxed => unreachable,

@@ -12,6 +16,11 @@ name: *kym.RuntimeRef,
 arity: u8,
 opcodes: OpcodeList,
 constants: ConstList,
+bindings: []?*kym.RuntimeRef,

@@ -14,1 +18,4 @@
 constants: ConstList,
+bindings: []?*kym.RuntimeRef,
+
+const Box = struct {

@@ -150,3 +170,2 @@
 
-	while (opcode_cursor < chunk.opcodes.values.len) : (opcode_cursor += 1) {
-		switch (chunk.opcodes.values[opcode_cursor]) {
+	while (opcode_cursor < self.opcodes.values.len) : (opcode_cursor += 1) {

@@ -514,0 +635,4 @@
+
+		coral.debug.assert(string != null);
+		app.log_info(string.?);
+	}

@@ -551,3 +677,3 @@
 pub const typeinfo = &kym.Typeinfo{
 	.size = @sizeOf(Self),
-	.name = "lambda",
+	.name = "func",

@@ -352,0 +390,4 @@
+
+		coral.debug.assert(capture.* == .declaration_index);
+
+		if (&target_environment.declarations[capture.declaration_index] == declaration) {

@@ -129,0 +120,4 @@
+						.declaration = declare: {
+							if (is_constant) {
+								break: declare environment.declare_constant(identifier) catch |declaration_error| {
+									return switch (declaration_error) {

@@ -129,0 +132,4 @@
+							}
+
+							break: declare environment.declare_variable(identifier) catch |declaration_error| {
+								return switch (declaration_error) {

@@ -24,0 +29,4 @@
+		capture_index: u8,
+	};
+
+	const DeclareError = coral.io.AllocationError || error {