Much better allocation strategy with new ncore arenas. Add more builtin node gen stuff. It's kind of wonky.

Parsing.jai

@@ -388,9 +388,84 @@ make_node :: (parse_state : *Parse_State, kind : AST_Kind) -> *AST_Node {
 // 	return node;
 // }
 
-// new_builtin_struct_node :: (nodes : *[..]AST_Node, name : string, member_names : []string, allocator : Allocator) -> *AST_Node {
+make_builtin_token :: (builder : *String_Builder, kind : Token_Kind, text : string, col : *int, line : *int) -> Token {
+	tok : Token;
+	tok.kind = kind;
+
+	start := 0;
+
+	buffer := get_current_buffer(builder);
+
+	if buffer {
+		start := buffer.count;
+	} 
 	
-// }
+	print_to_builder(builder, "%", text);
+	buffer = get_current_buffer(builder);
+	end := buffer.count;
+
+	for c : text {
+		if c == #char "\n" {
+			line.* ++ 1;
+			col.* = 0;
+		} else {
+			col.* += 1;
+		}
+	}
+
+	tok.column = col.*;	
+	tok.index  = buffer.count;
+	tok.length = text.count;
+	tok.builtin = true;
+
+	return tok;
+}
+
+new_builtin_struct_node :: (result : *Compile_Result, name : string, members : []Arg, allocator : Allocator) -> *AST_Node {
+	sc := get_scratch(result, allocator);
+	defer scratch_end(sc);
+	builder : String_Builder;
+	builder.allocator = sc.allocator; // I want to find a good way to use scratch here...
+
+	node := make_node(*result.nodes, .Struct, allocator);
+
+	col   := 0;
+	line  := 0;
+
+	tok_index := result.tokens.count;
+
+	array_add(*result.tokens, make_builtin_token(*builder, .TOKEN_IDENTIFIER, tprint("%", name), *col, *line));
+	append(*builder, " ");
+	array_add(*result.tokens, make_builtin_token(*builder, .TOKEN_DOUBLECOLON, "::", *col, *line));
+	append(*builder, " ");
+	array_add(*result.tokens, make_builtin_token(*builder, .TOKEN_STRUCT, "struct", *col, *line));
+	append(*builder, " ");
+	array_add(*result.tokens, make_builtin_token(*builder, .TOKEN_LEFTBRACE, "{", *col, *line));
+	append(*builder, "\n");
+
+	for member : members {
+		// @Incomplete: Missing field list
+		array_add(*result.tokens, make_builtin_token(*builder, .TOKEN_IDENTIFIER, tprint("%", member.name), *col, *line));
+		append(*builder, " ");
+		array_add(*result.tokens, make_builtin_token(*builder, .TOKEN_COLON, ":", *col, *line));
+		append(*builder, " ");
+		array_add(*result.tokens, make_builtin_token(*builder, .TOKEN_IDENTIFIER, tprint("%", member.typename), *col, *line));
+		array_add(*result.tokens, make_builtin_token(*builder, .TOKEN_SEMICOLON, ";", *col, *line));
+		append(*builder, "\n");
+	}
+
+	array_add(*result.tokens, make_builtin_token(*builder, .TOKEN_RIGHTBRACE, "}", *col, *line));
+	append(*builder, "\n");
+
+	source := builder_to_string(*builder,, allocator);
+
+	for i : tok_index..result.tokens.count - 1 {
+		tok := *result.tokens[i];
+		tok.source = *source.data[tok.column];
+	}
+
+	return node;
+}
 
 add_child :: (node : *AST_Node, child : *AST_Node) {
 	child.parent = node;