foo "";
foo '';
foo "foo
bar";
foo 'foo
bar';
foo " \" \' \\ \r \n \t";
foo ' \" \' \\ \r \n \t';
foo "$foo";
foo "${foo}bar";
foo "$arg_;";
# not escaped
foo "\$foo";
----------------------------------------------------
[
["directive", [
["keyword", "foo"],
["string", ["\"\""]]
]],
["punctuation", ";"],
["directive", [
["keyword", "foo"],
["string", ["''"]]
]],
["punctuation", ";"],
["directive", [
["keyword", "foo"],
["string", ["\"foo\r\nbar\""]]
]],
["punctuation", ";"],
["directive", [
["keyword", "foo"],
["string", ["'foo\r\nbar'"]]
]],
["punctuation", ";"],
["directive", [
["keyword", "foo"],
["string", [
"\" ",
["escape", "\\\""],
["escape", "\\'"],
["escape", "\\\\"],
["escape", "\\r"],
["escape", "\\n"],
["escape", "\\t"],
"\""
]]
]],
["punctuation", ";"],
["directive", [
["keyword", "foo"],
["string", [
"' ",
["escape", "\\\""],
["escape", "\\'"],
["escape", "\\\\"],
["escape", "\\r"],
["escape", "\\n"],
["escape", "\\t"],
"'"
]]
]],
["punctuation", ";"],
["directive", [
["keyword", "foo"],
["string", [
"\"",
["variable", "$foo"],
"\""
]]
]],
["punctuation", ";"],
["directive", [
["keyword", "foo"],
["string", [
"\"",
["variable", "${foo}"],
"bar\""
]]
]],
["punctuation", ";"],
["directive", [
["keyword", "foo"],
["string", [
"\"",
["variable", "$arg_;"],
"\""
]]
]],
["punctuation", ";"],
["comment", "# not escaped"],
["directive", [
["keyword", "foo"],
["string", [
"\"\\",
["variable", "$foo"],
"\""
]]
]],
["punctuation", ";"]
]
