feat: finished variables declaration / assign

include/compiler/fzl_walker.h

@@ -5,6 +5,7 @@
 #include <common/fzl_types.h>
 #include <compiler/fzl_parser.h>
 #include <compiler/utils/fzl_const_pool.h>
+#include <compiler/utils/fzl_symtable.h>
 #include <stdbool.h>
 #include <stddef.h>
 
@@ -26,6 +27,9 @@ typedef struct
   uint64_t *ops;
   size_t op_count;
   size_t op_remainder;
+
+  fzl_symtable_t *syms[64];
+  size_t sym_top;
 } fzl_walker_t;
 
 // Allocate new walker

include/compiler/utils/fzl_symtable.h

@@ -0,0 +1,44 @@
+#ifndef FZL_SYMTABLE_H
+#define FZL_SYMTABLE_H
+
+#include <common/fzl_types.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+typedef enum
+{
+  FZL_SYMTABLE_RESULT_OK,
+  FZL_SYMTABLE_RESULT_ERR,
+  FZL_SYMTABLE_RESULT_EXISTS
+} fzl_symtable_res_t;
+
+// Symbols table entry descriptor
+typedef struct
+{
+  char *name;
+  fzl_type_t type;
+} fzl_sym_t;
+
+// Symbols table descriptor
+typedef struct
+{
+  size_t size;
+  size_t remainder;
+
+  fzl_sym_t *symbols;
+} fzl_symtable_t;
+
+// Allocate new symbtable
+fzl_symtable_t *fzl_mksymt();
+
+// Put new entry into symtable
+fzl_symtable_res_t fzl_symt_put(fzl_symtable_t *symt, char *name,
+                                fzl_type_t type);
+
+// Get entry from specified symtable
+bool fzl_symt_get(fzl_symtable_t *symt, char *name, fzl_sym_t *res);
+
+// Free symbtable
+void fzl_freesymt(fzl_symtable_t *symt);
+
+#endif // FZL_SYMTABLE_H