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Warn if and elsif at EOL [EXPERIMENTAL]

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It is unnatural and probably a typo.
This commit is contained in:
Nobuyoshi Nakada 2019-11-04 21:23:11 +09:00
parent cf377c5556
commit ba35c14325
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1 changed files with 22 additions and 0 deletions
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22
parse.y
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@ -395,6 +395,12 @@ set_line_body(NODE *body, int line)
#define yyparse ruby_yyparse
#define WARN_EOL(tok) \
(looking_at_eol_p(p) ? \
rb_warning0("`" tok "' at the end of line without an expression") : \
(void)0)
static int looking_at_eol_p(struct parser_params *p);
static NODE* cond(struct parser_params *p, NODE *node, const YYLTYPE *loc);
static NODE* method_cond(struct parser_params *p, NODE *node, const YYLTYPE *loc);
#define new_nil(loc) NEW_NIL(loc)
@ -3070,6 +3076,7 @@ k_begin : keyword_begin
k_if : keyword_if
{
WARN_EOL("if");
token_info_push(p, "if", &@$);
if (p->token_info && p->token_info->nonspc &&
p->token_info->next && !strcmp(p->token_info->next->token, "else")) {
@ -3179,6 +3186,7 @@ k_else : keyword_else
k_elsif : keyword_elsif
{
WARN_EOL("elisif");
token_info_warn(p, "elsif", p->token_info, 1, &@$);
}
;
@ -6272,6 +6280,20 @@ pushback(struct parser_params *p, int c)
#define tok(p) (p)->tokenbuf
#define toklen(p) (p)->tokidx
static int
looking_at_eol_p(struct parser_params *p)
{
int c;
while ((c = nextc(p)) != -1) {
int eol = (c == '\n' || c == '#');
if (eol || !ISSPACE(c)) {
pushback(p, c);
return eol;
}
}
return TRUE;
}
static char*
newtok(struct parser_params *p)
{