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parse.y: add ellipsis

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* parse.y (parser_yyerror): add ellipsis properly when error line
  is truncated.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59194 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-06-28 05:38:27 +00:00
parent 3462dd3609
commit 7c7d74365d
2 changed files with 26 additions and 21 deletions
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38
parse.y
View file

@ -5036,42 +5036,38 @@ parser_yyerror(struct parser_params *parser, const char *msg)
#ifndef RIPPER
const int max_line_margin = 30;
const char *p, *pe;
const char *pre = "", *post = "";
const char *pre = "", *post = "", *pend;
const char *code = "", *caret = "", *newline = "";
const char *lim;
char *buf;
long len;
int i;
p = parser->tokp;
p = lex_p;
lim = p - lex_pbeg > max_line_margin ? p - max_line_margin : lex_pbeg;
while (lim < p) {
if (*(p-1) == '\n') break;
p--;
}
while ((lim < p) && (*(p-1) != '\n')) p--;
pe = lex_p;
lim = lex_pend - pe > max_line_margin ? pe + max_line_margin : lex_pend;
while (pe < lim) {
if (*pe == '\n') break;
pe++;
pend = lex_pend;
if (pend > lex_pbeg && pend[-1] == '\n') {
if (--pend > lex_pbeg && pend[-1] == '\r') --pend;
}
pe = lex_p;
lim = pend - pe > max_line_margin ? pe + max_line_margin : pend;
while ((pe < lim) && (*pe != '\n')) pe++;
len = pe - p;
if (len > 4) {
char *p2;
if (len > max_line_margin * 2 + 10) {
if (lex_p - p > max_line_margin) {
p = rb_enc_prev_char(p, lex_p - max_line_margin, pe, rb_enc_get(lex_lastline));
pre = "...";
}
if (pe - lex_p > max_line_margin) {
pe = rb_enc_prev_char(lex_p, lex_p + max_line_margin, pe, rb_enc_get(lex_lastline));
post = "...";
}
len = pe - p;
if (p > lex_pbeg) {
p = rb_enc_prev_char(lex_pbeg, p, lex_p, rb_enc_get(lex_lastline));
if (p > lex_pbeg) pre = "...";
}
if (pe < pend) {
pe = rb_enc_prev_char(lex_p, pe, pend, rb_enc_get(lex_lastline));
if (pe < pend) post = "...";
}
len = pe - p;
i = (int)(lex_p - p);
buf = ALLOCA_N(char, i+2);
code = p;

9
test/ruby/test_parse.rb
View file

@ -1013,6 +1013,15 @@ x = __ENCODING__
end
end
def test_truncated_source_line
e = assert_raise_with_message(SyntaxError, /unexpected tIDENTIFIER/) do
eval("'0123456789012345678901234567890123456789' abcdefghijklmnopqrstuvwxyz0123456789 0123456789012345678901234567890123456789")
end
line = e.message.lines[1]
assert_operator(line, :start_with?, "...")
assert_operator(line, :end_with?, "...\n")
end
=begin
def test_past_scope_variable
assert_warning(/past scope/) {catch {|tag| eval("BEGIN{throw tag}; tap {a = 1}; a")}}