Current File : //opt/alt/ruby18/share/ri/1.8/system/IO/scanf-i.yaml
--- !ruby/object:RI::MethodDescription
aliases: []
block_params:
comment:
- !ruby/struct:SM::Flow::P
body: The trick here is doing a match where you grab one <b>line</b> of input at a time. The linebreak may or may not occur at the boundary where the string matches a format specifier. And if it does, some rule about whitespace may or may not be in effect...
- !ruby/struct:SM::Flow::P
body: That's why this is much more elaborate than the string version.
- !ruby/struct:SM::Flow::P
body: "For each line: Match succeeds (non-emptily) and the last attempted spec/string sub-match succeeded:"
- !ruby/struct:SM::Flow::VERB
body: " could the last spec keep matching?\n yes: save interim results and continue (next line)\n"
- !ruby/struct:SM::Flow::P
body: "The last attempted spec/string did not match:"
- !ruby/struct:SM::Flow::P
body: are we on the next-to-last spec in the string?
- !ruby/struct:SM::Flow::VERB
body: " yes:\n is fmt_string.string_left all spaces?\n yes: does current spec care about input space?\n yes: fatal failure\n no: save interim results and continue\n no: continue [this state could be analyzed further]\n"
full_name: IO#scanf
is_singleton: false
name: scanf
params: (str,&b)
visibility: public