Class: StringScanner
Instance Attribute Summary collapse
-
#matched ⇒ Object
readonly
Returns the value of attribute matched.
-
#pos ⇒ Object
Returns the value of attribute pos.
-
#string ⇒ Object
readonly
Returns the value of attribute string.
Instance Method Summary collapse
- #[](idx) ⇒ Object
- #beginning_of_line? ⇒ Boolean (also: #bol?)
- #check(pattern) ⇒ Object
- #check_until(pattern) ⇒ Object
- #eos? ⇒ Boolean
- #exist?(pattern) ⇒ Boolean
- #get_byte ⇒ Object (also: #getch)
-
#initialize(string) ⇒ StringScanner
constructor
A new instance of StringScanner.
- #match?(pattern) ⇒ Boolean
- #peek(length) ⇒ Object
- #post_match ⇒ Object
- #pre_match ⇒ Object
- #reset ⇒ Object
- #rest ⇒ Object
- #rest? ⇒ Boolean
- #rest_size ⇒ Object
- #scan(pattern) ⇒ Object
- #scan_until(pattern) ⇒ Object
- #skip(pattern) ⇒ Object
- #skip_until(pattern) ⇒ Object
- #terminate ⇒ Object
- #unscan ⇒ Object
Constructor Details
#initialize(string) ⇒ StringScanner
Returns a new instance of StringScanner
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# File 'opal/stdlib/strscan.rb', line 5 def initialize(string) @string = string @pos = 0 @matched = nil @working = string @match = [] end |
Instance Attribute Details
#matched ⇒ Object (readonly)
Returns the value of attribute matched
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# File 'opal/stdlib/strscan.rb', line 3 def matched @matched end |
#pos ⇒ Object
Returns the value of attribute pos
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# File 'opal/stdlib/strscan.rb', line 2 def pos @pos end |
#string ⇒ Object (readonly)
Returns the value of attribute string
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# File 'opal/stdlib/strscan.rb', line 13 def string @string end |
Instance Method Details
#[](idx) ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 83 def [](idx) %x{ var match = #@match; if (idx < 0) { idx += match.length; } if (idx < 0 || idx >= match.length) { return nil; } if (match[idx] == null) { return nil; } return match[idx]; } end |
#beginning_of_line? ⇒ Boolean Also known as: bol?
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# File 'opal/stdlib/strscan.rb', line 15 def beginning_of_line? `#@pos === 0 || #@string.charAt(#@pos - 1) === "\n"` end |
#check(pattern) ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 103 def check(pattern) pattern = anchor(pattern) %x{ var result = pattern.exec(#@working); if (result == null) { return #@matched = nil; } return #@matched = result[0]; } end |
#check_until(pattern) ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 117 def check_until(pattern) %x{ var prev_pos = #@prev_pos, pos = #@pos; var result = #{scan_until(pattern)}; if (result !== nil) { #@matched = result.substr(-1); #@working = #@string.substr(pos); } #@prev_pos = prev_pos; #@pos = pos; return result; } end |
#eos? ⇒ Boolean
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# File 'opal/stdlib/strscan.rb', line 140 def eos? `#@working.length === 0` end |
#exist?(pattern) ⇒ Boolean
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# File 'opal/stdlib/strscan.rb', line 144 def exist?(pattern) %x{ var result = pattern.exec(#@working); if (result == null) { return nil; } else if (result.index == 0) { return 0; } else { return result.index + 1; } } end |
#get_byte ⇒ Object Also known as: getch
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# File 'opal/stdlib/strscan.rb', line 198 def get_byte %x{ var result = nil; if (#@pos < #@string.length) { #@prev_pos = #@pos; #@pos += 1; result = #@matched = #@working.substring(0, 1); #@working = #@working.substring(1); } else { #@matched = nil; } return result; } end |
#match?(pattern) ⇒ Boolean
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# File 'opal/stdlib/strscan.rb', line 219 def match?(pattern) pattern = anchor(pattern) %x{ var result = pattern.exec(#@working); if (result == null) { return nil; } else { #@prev_pos = #@pos; return result[0].length; } } end |
#peek(length) ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 136 def peek(length) `#@working.substring(0, length)` end |
#post_match ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 247 def post_match %x{ if (#@matched === nil) { return nil; } return #@string.substr(#@pos); } end |
#pre_match ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 257 def pre_match %x{ if (#@matched === nil) { return nil; } return #@string.substr(0, #@prev_pos); } end |
#reset ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 267 def reset @working = @string @matched = nil @pos = 0 end |
#rest ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 273 def rest @working end |
#rest? ⇒ Boolean
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# File 'opal/stdlib/strscan.rb', line 277 def rest? `#@working.length !== 0` end |
#rest_size ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 281 def rest_size rest.size end |
#scan(pattern) ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 21 def scan(pattern) pattern = anchor(pattern) %x{ var result = pattern.exec(#@working); if (result == null) { return #@matched = nil; } else if (typeof(result) === 'object') { #@prev_pos = #@pos; #@pos += result[0].length; #@working = #@working.substring(result[0].length); #@matched = result[0]; #@match = result; return result[0]; } else if (typeof(result) === 'string') { #@pos += result.length; #@working = #@working.substring(result.length); return result; } else { return nil; } } end |
#scan_until(pattern) ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 51 def scan_until(pattern) pattern = anchor(pattern) %x{ var pos = #@pos, working = #@working, result; while (true) { result = pattern.exec(working); pos += 1; working = working.substr(1); if (result == null) { if (working.length === 0) { return #@matched = nil; } continue; } #@matched = #@string.substr(#@pos, pos - #@pos - 1 + result[0].length); #@prev_pos = pos - 1; #@pos = pos; #@working = working.substr(result[0].length); return #@matched; } } end |
#skip(pattern) ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 160 def skip(pattern) pattern = anchor(pattern) %x{ var result = pattern.exec(#@working); if (result == null) { return #@matched = nil; } else { var match_str = result[0]; var match_len = match_str.length; #@matched = match_str; #@prev_pos = #@pos; #@pos += match_len; #@working = #@working.substring(match_len); return match_len; } } end |
#skip_until(pattern) ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 183 def skip_until(pattern) %x{ var result = #{scan_until(pattern)}; if (result === nil) { return nil; } else { #@matched = result.substr(-1); return result.length; } } end |
#terminate ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 285 def terminate @match = nil self.pos = @string.length end |
#unscan ⇒ Object
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# File 'opal/stdlib/strscan.rb', line 290 def unscan @pos = @prev_pos @prev_pos = nil @match = nil self end |