YourWishes/jerryscript
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Implement exponentiation operation. (#3692)

Browse Source 
JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-04-27 11:43:35 +02:00
committed by GitHub
parent daeee77d63
commit 4e8dac8ce1
18 changed files with 319 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files
jerry-core/parser/js/js-lexer.c
+97 -6
View File
@@ -1401,7 +1401,7 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
* @param type1 type
*/
#define LEXER_TYPE_A_TOKEN(char1, type1) \
case (uint8_t) (char1) : \
case (uint8_t) (char1): \
{ \
context_p->token.type = (type1); \
length = 1; \
@@ -1417,7 +1417,7 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
* @param type2 type of the second character
*/
#define LEXER_TYPE_B_TOKEN(char1, type1, char2, type2) \
case (uint8_t) (char1) : \
case (uint8_t) (char1): \
{ \
if (length >= 2 && context_p->source_p[1] == (uint8_t) (char2)) \
{ \
@@ -1442,7 +1442,7 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
* @param type3 type of the third character
*/
#define LEXER_TYPE_C_TOKEN(char1, type1, char2, type2, char3, type3) \
case (uint8_t) (char1) : \
case (uint8_t) (char1): \
{ \
if (length >= 2) \
{ \
@@ -1671,8 +1671,39 @@ lexer_next_token (parser_context_t *context_p) /**< context */
LEXER_TYPE_C_TOKEN (LIT_CHAR_MINUS, LEXER_SUBTRACT, LIT_CHAR_EQUALS,
LEXER_ASSIGN_SUBTRACT, LIT_CHAR_MINUS, LEXER_DECREASE)
LEXER_TYPE_B_TOKEN (LIT_CHAR_ASTERISK, LEXER_MULTIPLY, LIT_CHAR_EQUALS,
LEXER_ASSIGN_MULTIPLY)
case (uint8_t) LIT_CHAR_ASTERISK:
{
if (length >= 2)
{
if (context_p->source_p[1] == (uint8_t) LIT_CHAR_EQUALS)
{
context_p->token.type = LEXER_ASSIGN_MULTIPLY;
length = 2;
break;
}
#if ENABLED (JERRY_ES2015)
if (context_p->source_p[1] == (uint8_t) LIT_CHAR_ASTERISK)
{
if (length >= 3 && context_p->source_p[2] == (uint8_t) LIT_CHAR_EQUALS)
{
context_p->token.type = LEXER_ASSIGN_EXPONENTIATION;
length = 3;
break;
}
context_p->token.type = LEXER_EXPONENTIATION;
length = 2;
break;
}
#endif /* ENABLED (JERRY_ES2015) */
}
context_p->token.type = LEXER_MULTIPLY;
length = 1;
break;
}
LEXER_TYPE_B_TOKEN (LIT_CHAR_SLASH, LEXER_DIVIDE, LIT_CHAR_EQUALS,
LEXER_ASSIGN_DIVIDE)
LEXER_TYPE_B_TOKEN (LIT_CHAR_PERCENT, LEXER_MODULO, LIT_CHAR_EQUALS,
@@ -1763,7 +1794,7 @@ lexer_check_next_characters (parser_context_t *context_p, /**< context */
* @return consumed character
*/
inline uint8_t JERRY_ATTR_ALWAYS_INLINE
lexer_consume_next_character (parser_context_t *context_p)
lexer_consume_next_character (parser_context_t *context_p) /**< context */
{
JERRY_ASSERT (context_p->source_p < context_p->source_end_p);
@@ -1773,6 +1804,59 @@ lexer_consume_next_character (parser_context_t *context_p)
return *context_p->source_p++;
} /* lexer_consume_next_character */
/**
* Checks whether the next character can be the start of a post primary expression
*
* Note:
* the result is not precise, but this inprecise result
* has no side effects for negating number literals
*
* @return true if the next character can be the start of a post primary expression
*/
bool
lexer_check_post_primary_exp (parser_context_t *context_p) /**< context */
{
if (!(context_p->token.flags & LEXER_NO_SKIP_SPACES))
{
lexer_skip_spaces (context_p);
context_p->token.flags = (uint8_t) (context_p->token.flags | LEXER_NO_SKIP_SPACES);
}
if (context_p->source_p >= context_p->source_end_p)
{
return false;
}
switch (context_p->source_p[0])
{
case LIT_CHAR_DOT:
case LIT_CHAR_LEFT_PAREN:
case LIT_CHAR_LEFT_SQUARE:
#if ENABLED (JERRY_ES2015)
case LIT_CHAR_GRAVE_ACCENT:
#endif /* ENABLED (JERRY_ES2015) */
{
return true;
}
case LIT_CHAR_PLUS:
case LIT_CHAR_MINUS:
{
return (!(context_p->token.flags & LEXER_WAS_NEWLINE)
&& context_p->source_p + 1 < context_p->source_end_p
&& context_p->source_p[1] == context_p->source_p[0]);
}
#if ENABLED (JERRY_ES2015)
case LIT_CHAR_ASTERISK:
{
return (context_p->source_p + 1 < context_p->source_end_p
&& context_p->source_p[1] == (uint8_t) LIT_CHAR_ASTERISK);
}
#endif /* ENABLED (JERRY_ES2015) */
}
return false;
} /* lexer_check_post_primary_exp */
#if ENABLED (JERRY_ES2015)
/**
@@ -3295,10 +3379,17 @@ lexer_convert_binary_lvalue_token_to_binary (uint8_t token) /**< binary lvalue t
JERRY_ASSERT (LEXER_IS_BINARY_LVALUE_TOKEN (token));
JERRY_ASSERT (token != LEXER_ASSIGN);
#if ENABLED (JERRY_ES2015)
if (token <= LEXER_ASSIGN_EXPONENTIATION)
{
return (uint8_t) (LEXER_ADD + (token - LEXER_ASSIGN_ADD));
}
#else /* !ENABLED (JERRY_ES2015) */
if (token <= LEXER_ASSIGN_MODULO)
{
return (uint8_t) (LEXER_ADD + (token - LEXER_ASSIGN_ADD));
}
#endif /* ENABLED (JERRY_ES2015) */
if (token <= LEXER_ASSIGN_UNS_RIGHT_SHIFT)
{