Support parsing of scripts / functions stored in string values (#4728)

Function arguments must be passed as string values.
Snapshots are generated from compiled code rather than source code.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

jerry-core/parser/js/js-parser-internal.h

@@ -567,6 +567,10 @@ typedef struct
   parser_saved_context_t *last_context_p;     /**< last saved context */
   parser_stack_iterator_t last_statement;     /**< last statement position */
   cbc_script_t *script_p;                     /**< current script */
+  const uint8_t *source_start_p;              /**< source start */
+  lit_utf8_size_t source_size;                /**< source size */
+  const uint8_t *arguments_start_p;           /**< function argument list start */
+  lit_utf8_size_t arguments_size;             /**< function argument list size */
   ecma_value_t script_value;                  /**< current script as value */
   ecma_value_t user_value;                    /**< current user value */
 
@@ -853,8 +857,7 @@ bool scanner_literal_is_created (parser_context_t *context_p, uint16_t literal_i
 bool scanner_literal_exists (parser_context_t *context_p, uint16_t literal_index);
 #endif /* JERRY_ESNEXT */
 
-void scanner_scan_all (parser_context_t *context_p, const uint8_t *arg_list_p, const uint8_t *arg_list_end_p,
-                       const uint8_t *source_p, const uint8_t *source_end_p);
+void scanner_scan_all (parser_context_t *context_p);
 
 /**
  * @}