wip: working on analyzer

- Feat: add binary math analysis
- Fix: check for function context in block analysis
- Feat: add 'break' analysis
- Fix: few fixes in call analysis
- Feat: add class analysis
- Feat: add construct analysis
- Feat: add declaration analysis
- Feat: add field analysis
- Feat: add function analysis
- Feat: add loop analysis
- Ref: updated utilities and context functions

src/compiler/analyzer/context.c

@@ -25,14 +25,15 @@ fzl_an_ctx_t *an_nest_ctx(fzl_analyzer_t *analyzer, fzl_an_ctx_type_t type)
 // Close context and return parent
 fzl_an_ctx_t *an_fin_ctx(fzl_analyzer_t *analyzer)
 {
-  if (!analyzer || !analyzer->ctx)
+  if (!analyzer || analyzer->ctx == NULL)
     return NULL;
 
   fzl_an_ctx_t *current = analyzer->ctx;
   fzl_an_ctx_t *parent  = current->parent;
   analyzer->ctx         = parent;
-  fzl_freesymt(analyzer->symbols[--analyzer->symbols_top]);
 
   free(current);
+  fzl_freesymt(analyzer->symbols[--analyzer->symbols_top]);
+
   return parent;
 }