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parse.y: named whitespaces

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* parse.y: named escaped whitespaces to show unexpected character.
  bare whitespaces should not appear outside of word_list.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62663 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2018-03-05 08:32:46 +00:00
parent 71e58ad614
commit d2a03300d3
2 changed files with 28 additions and 0 deletions
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7
parse.y
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@ -836,7 +836,13 @@ static void token_info_pop(struct parser_params*, const char *token, const rb_co
%type <id> f_kwrest f_label f_arg_asgn call_op call_op2 reswords relop dot_or_colon
%token END_OF_INPUT 0 "end-of-input"
%token <id> '.'
/* escaped chars, should be ignored otherwise */
%token <id> '\\' "backslash"
%token <id> ' ' "escaped space"
%token <id> '\t' "escaped horizontal tab"
%token <id> '\f' "escaped form feed"
%token <id> '\r' "escaped carriage return"
%token <id> '\13' "escaped vertical tab"
%token tUPLUS RUBY_TOKEN(UPLUS) "unary+"
%token tUMINUS RUBY_TOKEN(UMINUS) "unary-"
%token tPOW RUBY_TOKEN(POW) "**"
@ -8095,6 +8101,7 @@ parser_yylex(struct parser_params *p)
dispatch_scan_event(p, tSP);
goto retry; /* skip \\n */
}
if (ISSPACE(c)) return c;
pushback(p, c);
return '\\';

21
test/ruby/test_parse.rb
View file

@ -1129,6 +1129,27 @@ x = __ENCODING__
end
end
def test_whitespace_warning
assert_raise_with_message(SyntaxError, /backslash/) do
eval("\\foo")
end
assert_raise_with_message(SyntaxError, /escaped space/) do
eval("\\ ")
end
assert_raise_with_message(SyntaxError, /escaped horizontal tab/) do
eval("\\\t")
end
assert_raise_with_message(SyntaxError, /escaped form feed/) do
eval("\\\f")
end
assert_raise_with_message(SyntaxError, /escaped carriage return/) do
assert_warn(/middle of line/) {eval("\\\r")}
end
assert_raise_with_message(SyntaxError, /escaped vertical tab/) do
eval("\\\v")
end
end
=begin
def test_past_scope_variable
assert_warning(/past scope/) {catch {|tag| eval("BEGIN{throw tag}; tap {a = 1}; a")}}