Merge branch 'master' of github.com:micropython/micropython
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commit
452932ace4
64
py/lexer.c
64
py/lexer.c
@ -126,6 +126,10 @@ static bool is_following_digit(mp_lexer_t *lex) {
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return unichar_isdigit(lex->chr1);
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}
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static bool is_following_odigit(mp_lexer_t *lex) {
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return lex->chr1 >= '0' && lex->chr1 <= '7';
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}
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// TODO UNICODE include unicode characters in definition of identifiers
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static bool is_head_of_identifier(mp_lexer_t *lex) {
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return is_letter(lex) || lex->chr0 == '_';
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@ -275,6 +279,32 @@ static const char *tok_kw[] = {
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NULL,
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};
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static int hex_digit(unichar c) {
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// c is assumed to be hex digit
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int n = c - '0';
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if (n > 9) {
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n &= ~('a' - 'A');
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n -= ('A' - ('9' + 1));
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}
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return n;
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}
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// This is called with CUR_CHAR() before first hex digit, and should return with
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// it pointing to last hex digit
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static bool get_hex(mp_lexer_t *lex, int num_digits, uint *result) {
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uint num = 0;
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while (num_digits-- != 0) {
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next_char(lex);
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unichar c = CUR_CHAR(lex);
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if (!unichar_isxdigit(c)) {
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return false;
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}
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num = (num << 4) + hex_digit(c);
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}
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*result = num;
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return true;
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}
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static void mp_lexer_next_token_into(mp_lexer_t *lex, mp_token_t *tok, bool first_token) {
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// skip white space and comments
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bool had_physical_newline = false;
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@ -439,12 +469,34 @@ static void mp_lexer_next_token_into(mp_lexer_t *lex, mp_token_t *tok, bool firs
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case 'v': c = 0x0b; break;
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case 'f': c = 0x0c; break;
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case 'r': c = 0x0d; break;
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// TODO \ooo octal
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case 'x': // TODO \xhh
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case 'N': // TODO \N{name} only in strings
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case 'u': // TODO \uxxxx only in strings
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case 'U': // TODO \Uxxxxxxxx only in strings
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default: break; // TODO error message
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case 'x':
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{
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uint num;
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if (!get_hex(lex, 2, &num)) {
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// TODO error message
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assert(0);
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}
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c = num;
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break;
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}
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case 'N': break; // TODO \N{name} only in strings
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case 'u': break; // TODO \uxxxx only in strings
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case 'U': break; // TODO \Uxxxxxxxx only in strings
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default:
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if (c >= '0' && c <= '7') {
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// Octal sequence, 1-3 chars
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int digits = 3;
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int num = c - '0';
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while (is_following_odigit(lex) && --digits != 0) {
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next_char(lex);
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num = num * 8 + (CUR_CHAR(lex) - '0');
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}
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c = num;
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} else {
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// TODO error message
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assert(0);
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}
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break;
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}
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if (c != MP_LEXER_CHAR_EOF) {
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vstr_add_char(&lex->vstr, c);
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@ -43,6 +43,7 @@ bool unichar_isspace(unichar c);
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bool unichar_isalpha(unichar c);
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bool unichar_isprint(unichar c);
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bool unichar_isdigit(unichar c);
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bool unichar_isxdigit(unichar c);
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/** string ******************************************************/
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@ -62,6 +62,10 @@ bool unichar_isdigit(unichar c) {
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return c < 128 && (attr[c] & FL_DIGIT) != 0;
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}
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bool unichar_isxdigit(unichar c) {
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return unichar_isdigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
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}
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/*
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bool char_is_alpha_or_digit(unichar c) {
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return c < 128 && (attr[c] & (FL_ALPHA | FL_DIGIT)) != 0;
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11
tests/basics/string-escape.py
Normal file
11
tests/basics/string-escape.py
Normal file
@ -0,0 +1,11 @@
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a = "a\1b"
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print(len(a))
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print(ord(a[1]))
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print(len("a\123b"))
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a = "a\12345b"
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print(len(a))
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print(ord(a[1]))
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a = "a\xffb"
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print(len(a))
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print(ord(a[1]))
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