diff options
Diffstat (limited to 'parse.y')
| -rw-r--r-- | parse.y | 18 |
1 files changed, 16 insertions, 2 deletions
@@ -4572,6 +4572,7 @@ static int parser_yyerror(struct parser_params *parser, const char *msg) { #ifndef RIPPER + const int max_line_margin = 30; const char *p, *pe; char *buf; int len, i; @@ -4593,10 +4594,23 @@ parser_yyerror(struct parser_params *parser, const char *msg) len = pe - p; if (len > 4) { char *p2; + const char *pre = "", *post = ""; + + 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, 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, rb_enc_get(lex_lastline)); + post = "..."; + } + len = pe - p; + } buf = ALLOCA_N(char, len+2); MEMCPY(buf, p, char, len); buf[len] = '\0'; - rb_compile_error_append("%s", buf); + rb_compile_error_append("%s%s%s", pre, buf, post); i = lex_p - p; p2 = buf; pe = buf + len; @@ -4607,7 +4621,7 @@ parser_yyerror(struct parser_params *parser, const char *msg) } buf[i] = '^'; buf[i+1] = '\0'; - rb_compile_error_append("%s", buf); + rb_compile_error_append("%s%s", pre, buf); } #else dispatch1(parse_error, STR_NEW2(msg)); |