chore: random cleanup (#286)

Author: DonIsaac

src/semantic/NodeLinks.zig

@@ -1,5 +1,7 @@
 //! Links AST nodes to other semantic data
 
+const NodeLinks = @This();
+
 /// Map of AST nodes to their parents. Index is the child node id.
 ///
 /// Confusingly, the root node id is also used as the "null" node id, so the
@@ -94,8 +96,6 @@ const ParentIdsIterator = struct {
     }
 };
 
-const NodeLinks = @This();
-
 const std = @import("std");
 const _ast = @import("ast.zig");
 const util = @import("util");

src/semantic/Reference.zig

@@ -1,6 +1,6 @@
 //! A reference on a symbol. Describes where and how a symbol is used.
 
-pub const Reference = @This();
+const Reference = @This();
 
 symbol: Symbol.Id.Optional,
 scope: Scope.Id,

src/semantic/Scope.zig

@@ -1,3 +1,5 @@
+const Scope = @This();
+
 /// Unique identifier for this scope.
 id: Id,
 /// Scope hints.
@@ -162,8 +164,6 @@ const ScopeParentIterator = struct {
     }
 };
 
-const Scope = @This();
-
 const std = @import("std");
 const util = @import("util");
 const _ast = @import("ast.zig");

src/semantic/Semantic.zig

@@ -13,11 +13,13 @@
 //! an entire linked binary or library; rather it refers to a single parsed
 //! file.
 
+const Semantic = @This();
+
 parse: Parse, // NOTE: allocated in _arena
 symbols: Symbol.Table = .{},
 scopes: Scope.Tree = .{},
 modules: ModuleRecord = .{},
-node_links: NodeLinks,
+node_links: NodeLinks = .{},
 _gpa: Allocator,
 /// Used to allocate AST nodes
 _arena: ArenaAllocator,
@@ -130,8 +132,6 @@ pub fn deinit(self: *Semantic) void {
     self.* = undefined;
 }
 
-const Semantic = @This();
-
 const std = @import("std");
 const Allocator = std.mem.Allocator;
 const ArenaAllocator = std.heap.ArenaAllocator;

src/semantic/Symbol.zig

@@ -2,6 +2,8 @@
 //!
 //! Type: `pub struct Symbol<'a>`
 
+const Symbol = @This();
+
 /// Identifier bound to this symbol.
 ///
 ///
@@ -330,8 +332,6 @@ pub const ReferenceIterator = struct {
     }
 };
 
-const Symbol = @This();
-
 const std = @import("std");
 const util = @import("util");
 const ast = @import("ast.zig");