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parse.y: refine literal error messages

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* parse.y (parser_yyerror): strip newline in error source which
  will not be printed, when lex_p has passed it.

* parse.y (parser_tokadd_utf8): unterminated Unicode escape even
  after invalid Unicode escape.

* parse.y (parser_parse_string): show the error source line when
  unterminated literal at end of file.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59349 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-07-17 00:11:38 +00:00
parent b17efb6874
commit 28695a8fff
2 changed files with 37 additions and 17 deletions
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36
parse.y
View file

@ -5042,15 +5042,15 @@ parser_yyerror(struct parser_params *parser, const char *msg)
long len;
int i;
p = lex_p;
lim = p - lex_pbeg > max_line_margin ? p - max_line_margin : lex_pbeg;
while ((lim < p) && (*(p-1) != '\n')) p--;
pend = lex_pend;
if (pend > lex_pbeg && pend[-1] == '\n') {
if (--pend > lex_pbeg && pend[-1] == '\r') --pend;
}
pe = lex_p;
p = pe = lex_p < pend ? lex_p : pend;
lim = p - lex_pbeg > max_line_margin ? p - max_line_margin : lex_pbeg;
while ((lim < p) && (*(p-1) != '\n')) p--;
lim = pend - pe > max_line_margin ? pe + max_line_margin : pend;
while ((pe < lim) && (*pe != '\n')) pe++;
@ -5067,20 +5067,22 @@ parser_yyerror(struct parser_params *parser, const char *msg)
if (pe < pend) post = "...";
}
len = pe - p;
i = (int)(lex_p - p);
lim = lex_p < pend ? lex_p : pend;
i = (int)(lim - p);
buf = ALLOCA_N(char, i+2);
code = p;
caret = p2 = buf;
if (p <= parser->tokp) {
while (p < parser->tokp) {
pe = (parser->tokp < lim ? parser->tokp : lim);
if (p <= pe) {
while (p < pe) {
*p2++ = *p++ == '\t' ? '\t' : ' ';
}
*p2++ = '^';
p++;
}
if (lex_p > p) {
memset(p2, '~', (lex_p - p));
p2 += (lex_p - p);
if (lim > p) {
memset(p2, '~', (lim - p));
p2 += (lim - p);
}
*p2 = '\0';
newline = "\n";
@ -5711,7 +5713,7 @@ parser_tokadd_utf8(struct parser_params *parser, rb_encoding **encp,
while (!string_literal || c != close_brace) {
if (regexp_literal) tokadd(last);
if (!parser_tokadd_codepoint(parser, encp, regexp_literal, TRUE)) {
return 0;
break;
}
while (ISSPACE(c = *lex_p)) {
if (++lex_p >= lex_pend) goto unterminated;
@ -6282,11 +6284,17 @@ parser_parse_string(struct parser_params *parser, NODE *quote)
if (tokadd_string(func, term, paren, &quote->nd_nest,
&enc) == -1) {
if (parser->eofp) {
#ifndef RIPPER
# define unterminated_literal(mesg) yyerror(mesg)
#else
# define unterminated_literal(mesg) compile_error(PARSER_ARG mesg)
#endif
literal_flush(lex_p);
if (func & STR_FUNC_REGEXP) {
compile_error(PARSER_ARG "unterminated regexp meets end of file");
unterminated_literal("unterminated regexp meets end of file");
}
else {
compile_error(PARSER_ARG "unterminated string meets end of file");
unterminated_literal("unterminated string meets end of file");
}
quote->nd_func |= STR_FUNC_TERM;
}

18
test/ruby/test_parse.rb
View file

@ -489,11 +489,23 @@ class TestParse < Test::Unit::TestCase
e = assert_syntax_error('"\xg1"', /hex escape/)
assert_equal(' ^', e.message.lines.last, mesg)
e = assert_syntax_error('"\u{1234"', 'Unicode escape')
assert_match(' ^', e.message.lines.last, mesg)
e = assert_syntax_error('"\u{1234"', 'unterminated Unicode escape')
assert_equal(' ^', e.message.lines.last, mesg)
e = assert_syntax_error('"\u{xxxx}"', 'invalid Unicode escape')
assert_match(' ^', e.message.lines.last, mesg)
assert_equal(' ^', e.message.lines.last, mesg)
e = assert_syntax_error('"\u{xxxx', 'Unicode escape')
assert_pattern_list([
/.*: invalid Unicode escape\n.*\n/,
/ \^/,
/\n/,
/.*: unterminated Unicode escape\n.*\n/,
/ \^/,
/\n/,
/.*: unterminated string.*\n.*\n/,
/ \^/,
], e.message)
e = assert_syntax_error('"\M1"', /escape character syntax/)
assert_equal(' ^~~', e.message.lines.last, mesg)