treewide: rework internal data type system

Instead of relying on json_object values internally, use custom types to
represent the different ucode value types which brings a number of
advantages compared to the previous approach:

 - Due to the use of tagged pointers, small integer, string and bool
   values can be stored directly in the pointer addresses, vastly
   reducing required heap memory

 - Ability to create circular data structures such as
   `let o; o = { test: o };`

 - Ability to register custom `tostring()` function through prototypes

 - Initial mark/sweep GC implementation to tear down circular object
   graphs on VM deinit

The change also paves the way for possible future extensions such as
constant variables and meta methods for custom ressource types.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 6 insertions, 6 deletions

diff --git a/compiler.h b/compiler.h
index 53ff987..7b241ff 100644
--- a/compiler.h
+++ b/compiler.h
@@ -28,8 +28,8 @@
 #endif
 
 #include "source.h"
-#include "object.h"
 #include "lexer.h"
+#include "types.h"
 #include "util.h"
 
 typedef enum {
@@ -72,14 +72,14 @@ struct uc_patchlist {
 typedef struct uc_patchlist uc_patchlist;
 
 typedef struct {
-	json_object *name;
+	uc_value_t *name;
 	ssize_t depth;
 	size_t from;
 	bool captured;
 } uc_local;
 
 typedef struct {
-	json_object *name;
+	uc_value_t *name;
 	size_t index;
 	bool local;
 } uc_upval;
@@ -93,7 +93,7 @@ typedef struct {
 	uc_lexer lex;
 	uc_token prev, curr;
 	bool synchronizing;
-	char *error;
+	uc_stringbuf_t *error;
 } uc_parser;
 
 struct uc_compiler {
@@ -101,7 +101,7 @@ struct uc_compiler {
 	uc_locals locals;
 	uc_upvals upvals;
 	uc_patchlist *patchlist;
-	uc_function *function;
+	uc_value_t *function;
 	uc_parser *parser;
 	size_t scope_depth, current_srcpos, last_insn;
 	bool statement_emitted;
@@ -115,6 +115,6 @@ typedef struct {
 	uc_precedence_t precedence;
 } uc_parse_rule;
 
-uc_function *uc_compile(uc_parse_config *config, uc_source *source, char **errp);
+uc_function_t *uc_compile(uc_parse_config *config, uc_source *source, char **errp);
 
 #endif /* __COMPILER_H_ */