class PuppetDB::Lexer
Attributes
filename[R]
lineno[R]
state[RW]
Public Instance Methods
_next_token()
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# File lib/puppetdb/lexer.rb, line 59 def _next_token text = @ss.peek(1) @lineno += 1 if text == "\n" token = case @state when nil case when (text = @ss.scan(/\s/)) ; when (text = @ss.scan(/\(/)) action { [:LPAREN, text] } when (text = @ss.scan(/\)/)) action { [:RPAREN, text] } when (text = @ss.scan(/\[/)) action { [:LBRACK, text] } when (text = @ss.scan(/\]/)) action { [:RBRACK, text] } when (text = @ss.scan(/\{/)) action { [:LBRACE, text] } when (text = @ss.scan(/\}/)) action { [:RBRACE, text] } when (text = @ss.scan(/=/)) action { [:EQUALS, text] } when (text = @ss.scan(/\!=/)) action { [:NOTEQUALS, text] } when (text = @ss.scan(/~/)) action { [:MATCH, text] } when (text = @ss.scan(/\!~/)) action { [:NOTMATCH, text] } when (text = @ss.scan(/<=/)) action { [:LESSTHANEQ, text] } when (text = @ss.scan(/</)) action { [:LESSTHAN, text] } when (text = @ss.scan(/>=/)) action { [:GREATERTHANEQ, text] } when (text = @ss.scan(/>/)) action { [:GREATERTHAN, text] } when (text = @ss.scan(/\*/)) action { [:ASTERISK, text] } when (text = @ss.scan(/\#/)) action { [:HASH, text] } when (text = @ss.scan(/\./)) action { [:DOT, text] } when (text = @ss.scan(/not(?![\w_:])/)) action { [:NOT, text] } when (text = @ss.scan(/and(?![\w_:])/)) action { [:AND, text] } when (text = @ss.scan(/or(?![\w_:])/)) action { [:OR, text] } when (text = @ss.scan(/true(?![\w_:])/)) action { [:BOOLEAN, true]} when (text = @ss.scan(/false(?![\w_:])/)) action { [:BOOLEAN, false]} when (text = @ss.scan(/-?\d+/)) action { [:NUMBER, text.to_i] } when (text = @ss.scan(/\"(\\.|[^\\"])*\"/)) action { [:STRING, YAML.load(text)] } when (text = @ss.scan(/\'(\\.|[^\\'])*\'/)) action { [:STRING, YAML.load(text)] } when (text = @ss.scan(/[\w_:]+/)) action { [:STRING, text] } when (text = @ss.scan(/@@/)) action { [:EXPORTED, text] } when (text = @ss.scan(/@/)) action { [:AT, 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
action() { || ... }
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# File lib/puppetdb/lexer.rb, line 28 def action yield end
load_file( filename )
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# File lib/puppetdb/lexer.rb, line 38 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/puppetdb/lexer.rb, line 51 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/puppetdb/lexer.rb, line 45 def scan_file( filename ) load_file(filename) do_parse end
scan_setup(str)
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# File lib/puppetdb/lexer.rb, line 22 def scan_setup(str) @ss = StringScanner.new(str) @lineno = 1 @state = nil end
scan_str(str)
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# File lib/puppetdb/lexer.rb, line 32 def scan_str(str) scan_setup(str) do_parse end
Also aliased as: scan