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# File 'lib/puppetdb/lexer.rb', line 48
def scan_evaluate( str )
scan_setup
@rex_tokens = []
@lineno = 1
ss = StringScanner.new(str)
state = nil
until ss.eos?
text = ss.peek(1)
@lineno += 1 if text == "\n"
case state
when nil
case
when (text = ss.scan(/\s/))
;
when (text = ss.scan(/\(/))
@rex_tokens.push action { [:LPAREN, text] }
when (text = ss.scan(/\)/))
@rex_tokens.push action { [:RPAREN, text] }
when (text = ss.scan(/\[/))
@rex_tokens.push action { [:LBRACK, text] }
when (text = ss.scan(/\]/))
@rex_tokens.push action { [:RBRACK, text] }
when (text = ss.scan(/\{/))
@rex_tokens.push action { [:LBRACE, text] }
when (text = ss.scan(/\}/))
@rex_tokens.push action { [:RBRACE, text] }
when (text = ss.scan(/=/))
@rex_tokens.push action { [:EQUALS, text] }
when (text = ss.scan(/\!=/))
@rex_tokens.push action { [:NOTEQUALS, text] }
when (text = ss.scan(/~/))
@rex_tokens.push action { [:MATCH, text] }
when (text = ss.scan(/</))
@rex_tokens.push action { [:LESSTHAN, text] }
when (text = ss.scan(/>/))
@rex_tokens.push action { [:GREATERTHAN, text] }
when (text = ss.scan(/not(?![\w_:])/))
@rex_tokens.push action { [:NOT, text] }
when (text = ss.scan(/and(?![\w_:])/))
@rex_tokens.push action { [:AND, text] }
when (text = ss.scan(/or(?![\w_:])/))
@rex_tokens.push action { [:OR, text] }
when (text = ss.scan(/true(?![\w_:])/))
@rex_tokens.push action { [:BOOLEAN, true]}
when (text = ss.scan(/false(?![\w_:])/))
@rex_tokens.push action { [:BOOLEAN, false]}
when (text = ss.scan(/-?\d+\.\d+/))
@rex_tokens.push action { [:NUMBER, text.to_f] }
when (text = ss.scan(/-?\d+/))
@rex_tokens.push action { [:NUMBER, text.to_i] }
when (text = ss.scan(/\"(\\.|[^\\"])*\"/))
@rex_tokens.push action { [:STRING, YAML.load(text)] }
when (text = ss.scan(/[\w_:]+/))
@rex_tokens.push action { [:STRING, text] }
when (text = ss.scan(/@@/))
@rex_tokens.push action { [:EXPORTED, text] }
else
text = ss.string[ss.pos .. -1]
raise ScanError, "can not match: '" + text + "'"
end
else
raise ScanError, "undefined state: '" + state.to_s + "'"
end end end
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