emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

bc: allow only one <newline> between if() and stmt

Browse Source 
Attempt to have more than one causes this error message:

	$ bc -q
	if (1)<cr>
	<cr>
	bc: no statement after 'if'

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-12-16 20:41:32 +01:00
parent e6c40c48d9
commit 2e8be023cb
1 changed files with 13 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
miscutils/bc.c
View File

@ -3677,6 +3677,16 @@ static BC_STATUS zbc_parse_stmt(BcParse *p)
# define zbc_parse_stmt(...) (zbc_parse_stmt(__VA_ARGS__), BC_STATUS_SUCCESS)
#endif
static BC_STATUS zbc_parse_stmt_fail_if_bare_NLINE(BcParse *p, const char *after_X)
{
if (p->l.t.t == BC_LEX_NLINE)
RETURN_STATUS(bc_error_fmt("no statement after '%s'", after_X));
RETURN_STATUS(zbc_parse_stmt(p));
}
#if ERRORS_ARE_FATAL
# define zbc_parse_stmt_fail_if_bare_NLINE((...) (zbc_parse_stmt_fail_if_bare_NLINE((__VA_ARGS__), BC_STATUS_SUCCESS)
#endif
static void bc_parse_operator(BcParse *p, BcLexType type, size_t start,
size_t *nexprs)
{
@ -4141,7 +4151,7 @@ static BC_STATUS zbc_parse_if(BcParse *p)
bc_vec_push(&p->exits, &ip);
bc_vec_push(&p->func->labels, &ip.idx);
s = zbc_parse_stmt(p);
s = zbc_parse_stmt_fail_if_bare_NLINE(p, "if");
if (s) RETURN_STATUS(s);
dbg_lex("%s:%d in if after stmt: p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
@ -4220,8 +4230,7 @@ static BC_STATUS zbc_parse_while(BcParse *p)
bc_parse_push(p, BC_INST_JUMP_ZERO);
bc_parse_pushIndex(p, ip.idx);
//TODO: diagnose "while(cond)<newline><newline>"? Now it is seen as "while() with empty body"
s = zbc_parse_stmt(p);
s = zbc_parse_stmt_fail_if_bare_NLINE(p, "while");
if (s) RETURN_STATUS(s);
n = *((size_t *) bc_vec_top(&p->conds));
@ -4325,7 +4334,7 @@ static BC_STATUS zbc_parse_for(BcParse *p)
s = zbc_lex_next_and_skip_NLINE(&p->l);
if (s) RETURN_STATUS(s);
s = zbc_parse_stmt(p);
s = zbc_parse_stmt_fail_if_bare_NLINE(p, "for");
if (s) RETURN_STATUS(s);
n = *((size_t *) bc_vec_top(&p->conds));