Implement tagged template literals (#3456)

Missing features: snapshot support

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

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

@@ -214,6 +214,11 @@ typedef enum
 #define LEXER_BINARY_LVALUE_OP_TOKEN_TO_OPCODE(token_type) \
    ((cbc_opcode_t) ((((token_type) - LEXER_ASSIGN_ADD) * 2) + CBC_ASSIGN_ADD))
 
+/**
+ * Maximum local buffer size for identifiers which contains escape sequences.
+ */
+#define LEXER_MAX_LITERAL_LOCAL_BUFFER_SIZE 48
+
 /**
  * Lexer newline flags.
  */
@@ -234,6 +239,15 @@ typedef enum
   LEXER_OBJ_IDENT_OBJECT_PATTERN = (1u << 3),   /**< parse "get"/"set" as string literal in object pattern */
 } lexer_obj_ident_opts_t;
 
+/**
+ * Lexer string options.
+ */
+typedef enum
+{
+  LEXER_STRING_NO_OPTS = (1u << 0),       /**< no options */
+  LEXER_STRING_RAW = (1u << 1),           /**< raw string ECMAScript v6, 11.8.6.1: TVR */
+} lexer_string_options_t;
+
 /**
  * Lexer scan identifier parse options.
  */