class SQLSearch::Parser
Constants
- Racc_arg
- Racc_debug_parser
- Racc_token_to_s_table
Attributes
filename[R]
lineno[R]
state[RW]
Public Instance Methods
_next_token()
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# File lib/sql_search/parser.rex.rb, line 54 def _next_token text = @ss.peek(1) @lineno += 1 if text == "\n" token = case @state when nil case when (text = @ss.scan(/[ \t]+/i)) ; when (text = @ss.scan(/\d+\.\d+/i)) action { [:APPROXNUM, text.to_f] } when (text = @ss.scan(/\d+/i)) action { [:INTNUM, text.to_i] } when (text = @ss.scan(/'\d+-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}([+-]\d{2}:\d{2}|Z)'/i)) action { [:TIME, DateTime.iso8601(text[1...-1])] } when (text = @ss.scan(/'[^']+'/i)) action { [:STRING, text[1...-1]] } when (text = @ss.scan(/IS/i)) action { [:IS, text] } when (text = @ss.scan(/NOT/i)) action { [:NOT, text] } when (text = @ss.scan(/NULL/i)) action { [:NULL, text.upcase] } when (text = @ss.scan(/IN/i)) action { [:IN, text] } when (text = @ss.scan(/OR/i)) action { [:OR, text] } when (text = @ss.scan(/AND/i)) action { [:AND, text] } when (text = @ss.scan(/BETWEEN/i)) action { [:BETWEEN, text] } when (text = @ss.scan(/LIKE/i)) action { [:LIKE, text] } when (text = @ss.scan(/(<>|=|[<][=]|[<]|[>][=]|[>])/i)) action { [:COMPARISON, text] } when (text = @ss.scan(/[A-z_]([A-z0-9_]*)/i)) action { [:NAME, text] } when (text = @ss.scan(/\(/i)) action { [:LPAREN, text] } when (text = @ss.scan(/\)/i)) action { [:RPAREN, text] } when (text = @ss.scan(/\./i)) action { [:DOT, text] } when (text = @ss.scan(/\,/i)) action { [:COMMA, text] } when (text = @ss.scan(/\+/i)) action { [:ADD, text] } when (text = @ss.scan(/\-/i)) action { [:SUBTRACT, text] } when (text = @ss.scan(/\//i)) action { [:DIVIDE, text] } when (text = @ss.scan(/\*/i)) action { [:MULTIPLY, 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
_reduce_none(val, _values, result)
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# File lib/sql_search/parser.racc.rb, line 501 def _reduce_none(val, _values, result) val[0] end
action() { || ... }
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# File lib/sql_search/parser.rex.rb, line 23 def action yield end
load_file( filename )
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# File lib/sql_search/parser.rex.rb, line 33 def load_file( filename ) @filename = filename open(filename, "r") do |f| scan_setup(f.read) end end
next_token()
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# File lib/sql_search/parser.rex.rb, line 46 def next_token return if @ss.eos? # skips empty actions until token = _next_token or @ss.eos?; end token end
scan_file( filename )
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# File lib/sql_search/parser.rex.rb, line 40 def scan_file( filename ) load_file(filename) do_parse end
scan_setup(str)
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# File lib/sql_search/parser.rex.rb, line 17 def scan_setup(str) @ss = StringScanner.new(str) @lineno = 1 @state = nil end
scan_str(str)
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# File lib/sql_search/parser.rex.rb, line 27 def scan_str(str) scan_setup(str) do_parse end
Also aliased as: scan
tokenize(code)
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# File lib/sql_search/parser.rex.rb, line 140 def tokenize(code) scan_setup(code) tokens = [] while token = next_token tokens << token end tokens end