--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: "This returns the value that #scan_until would return, without advancing the scan pointer. The match register is affected, though."
- !ruby/struct:SM::Flow::VERB 
  body: "  s = StringScanner.new("Fri Dec 12 1975 14:39")\n  s.check_until /12/          # -> "Fri Dec 12"\n  s.pos                       # -> 0\n  s.matched                   # -> 12\n"
- !ruby/struct:SM::Flow::P 
  body: "Mnemonic: it "checks" to see whether a #scan_until will return a value."
full_name: StringScanner#check_until
is_singleton: false
name: check_until
params: " check_until(pattern)\n"
visibility: public