Class: Rack::Mount::StrexpParser
- Inherits:
-
Racc::Parser
- Object
- Racc::Parser
- Rack::Mount::StrexpParser
- Defined in:
- lib/rack/mount/strexp/parser.rb,
lib/rack/mount/strexp/tokenizer.rb
Defined Under Namespace
Classes: ScanError
Constant Summary collapse
- REGEXP_NAMED_CAPTURE =
'(?:<%s>%s)'.freeze
- Racc_arg =
[ racc_action_table, racc_action_check, racc_action_default, racc_action_pointer, racc_goto_table, racc_goto_check, racc_goto_default, racc_goto_pointer, racc_nt_base, racc_reduce_table, racc_token_table, racc_shift_n, racc_reduce_n, racc_use_result_var ]
- Racc_token_to_s_table =
[ "$end", "error", "PARAM", "GLOB", "LPAREN", "RPAREN", "CHAR", "$start", "target", "expr", "token" ]
- Racc_debug_parser =
false
Instance Attribute Summary collapse
-
#filename ⇒ Object
readonly
Returns the value of attribute filename.
-
#lineno ⇒ Object
readonly
Returns the value of attribute lineno.
-
#requirements ⇒ Object
Returns the value of attribute requirements.
-
#state ⇒ Object
Returns the value of attribute state.
Instance Method Summary collapse
-
#_reduce_1(val, _values, result) ⇒ Object
reduce 0 omitted.
- #_reduce_2(val, _values, result) ⇒ Object
-
#_reduce_4(val, _values, result) ⇒ Object
reduce 3 omitted.
- #_reduce_5(val, _values, result) ⇒ Object
- #_reduce_6(val, _values, result) ⇒ Object
- #_reduce_7(val, _values, result) ⇒ Object
- #_reduce_none(val, _values, result) ⇒ Object
- #action(&block) ⇒ Object
- #load_file(filename) ⇒ Object
- #next_token ⇒ Object
- #scan_file(filename) ⇒ Object
- #scan_setup(str) ⇒ Object
- #scan_str(str) ⇒ Object
Instance Attribute Details
#filename ⇒ Object (readonly)
Returns the value of attribute filename.
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# File 'lib/rack/mount/strexp/tokenizer.rb', line 15 def filename @filename end |
#lineno ⇒ Object (readonly)
Returns the value of attribute lineno.
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# File 'lib/rack/mount/strexp/tokenizer.rb', line 14 def lineno @lineno end |
#requirements ⇒ Object
Returns the value of attribute requirements.
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# File 'lib/rack/mount/strexp/parser.rb', line 22 def requirements @requirements end |
#state ⇒ Object
Returns the value of attribute state.
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# File 'lib/rack/mount/strexp/tokenizer.rb', line 16 def state @state end |
Instance Method Details
#_reduce_1(val, _values, result) ⇒ Object
reduce 0 omitted
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# File 'lib/rack/mount/strexp/parser.rb', line 115 def _reduce_1(val, _values, result) result = "\\A#{val.join}\\Z" result end |
#_reduce_2(val, _values, result) ⇒ Object
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# File 'lib/rack/mount/strexp/parser.rb', line 120 def _reduce_2(val, _values, result) result = val.join result end |
#_reduce_4(val, _values, result) ⇒ Object
reduce 3 omitted
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# File 'lib/rack/mount/strexp/parser.rb', line 127 def _reduce_4(val, _values, result) name = val[0].to_sym requirement = requirements[name] result = REGEXP_NAMED_CAPTURE % [name, requirement] result end |
#_reduce_5(val, _values, result) ⇒ Object
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# File 'lib/rack/mount/strexp/parser.rb', line 135 def _reduce_5(val, _values, result) name = val[0].to_sym result = REGEXP_NAMED_CAPTURE % [name, '.+'] result end |
#_reduce_6(val, _values, result) ⇒ Object
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# File 'lib/rack/mount/strexp/parser.rb', line 142 def _reduce_6(val, _values, result) result = "(?:#{val[1]})?" result end |
#_reduce_7(val, _values, result) ⇒ Object
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# File 'lib/rack/mount/strexp/parser.rb', line 147 def _reduce_7(val, _values, result) result = Regexp.escape(val[0]) result end |
#_reduce_none(val, _values, result) ⇒ Object
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# File 'lib/rack/mount/strexp/parser.rb', line 152 def _reduce_none(val, _values, result) val[0] end |
#action(&block) ⇒ Object
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# File 'lib/rack/mount/strexp/tokenizer.rb', line 24 def action(&block) yield end |
#load_file(filename) ⇒ Object
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# File 'lib/rack/mount/strexp/tokenizer.rb', line 33 def load_file( filename ) @filename = filename open(filename, "r") do |f| scan_setup(f.read) end end |
#next_token ⇒ Object
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# File 'lib/rack/mount/strexp/tokenizer.rb', line 46 def next_token return if @ss.eos? text = @ss.peek(1) @lineno += 1 if text == "\n" token = case @state when nil case when (text = @ss.scan(/\\(\(|\)|:|\*)/)) action { [:CHAR, @ss[1]] } when (text = @ss.scan(/\:([a-zA-Z_]\w*)/)) action { [:PARAM, @ss[1]] } when (text = @ss.scan(/\*([a-zA-Z_]\w*)/)) action { [:GLOB, @ss[1]] } when (text = @ss.scan(/\(/)) action { [:LPAREN, text] } when (text = @ss.scan(/\)/)) action { [:RPAREN, text] } when (text = @ss.scan(/./)) action { [:CHAR, text] } else text = @ss.string[@ss.pos .. -1] raise ScanError, "can not match: '" + text + "'" end # if else raise ScanError, "undefined state: '" + state.to_s + "'" end # case state token end |
#scan_file(filename) ⇒ Object
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# File 'lib/rack/mount/strexp/tokenizer.rb', line 40 def scan_file( filename ) load_file(filename) do_parse end |
#scan_setup(str) ⇒ Object
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# File 'lib/rack/mount/strexp/tokenizer.rb', line 18 def scan_setup(str) @ss = StringScanner.new(str) @lineno = 1 @state = nil end |
#scan_str(str) ⇒ Object
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# File 'lib/rack/mount/strexp/tokenizer.rb', line 28 def scan_str(str) scan_setup(str) do_parse end |