Class: ExcelFormulaLexer

Inherits:
Object
  • Object
show all
Defined in:
lib/surpass/ExcelFormulaLexer.rb

Overview

ExcelFormulaLexer (ExcelFormula.g) Generated by ANTLR 3.1.2-2008-10-21 on 2009-06-15 23:03:59

Defined Under Namespace

Classes: CharStream, DFA, Token

Constant Summary collapse

COMMA = 
25
TRUE_CONST = 
12
PERCENT = 
11
POWER = 
10
FUNC_CHOOSE = 
33
BANG = 
28
EQ = 
4
QUOTENAME = 
31
LT = 
19
NE = 
21
GT = 
20
FUNC_IF = 
32
RP = 
27
FALSE_CONST = 
13
LP = 
26
GE = 
23
MUL = 
8
NUM_CONST = 
16
REF2D = 
17
SEMICOLON = 
24
CONCAT = 
5
EOF = 
-1
LE = 
22
INT_CONST = 
15
STR_CONST = 
14
COLON = 
18
DIV = 
9
DIGIT = 
29
SUB = 
7
NAME = 
30
ADD = 
6

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ ExcelFormulaLexer

Returns a new instance of ExcelFormulaLexer.



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# File 'lib/surpass/ExcelFormulaLexer.rb', line 39

def initialize(input)
    input = StringIO.new(input) if input.respond_to?(:to_str)
    @input = CharStream.new(input)
    @backtracking = 0
    @failed = false

end

Instance Method Details

#next_token ⇒ Object 



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# File 'lib/surpass/ExcelFormulaLexer.rb', line 47

def next_token
	# TODO: catch exceptions
		@token = nil
		@channel = nil
		@text = nil

		@start = @input.index
		@line = @input.line
		@pos = @input.column

		@type = nil
		@type_int = nil

		return :EOF if @input.look_ahead(1) == :EOF

		match_Tokens()

		if @token == nil
			@text ||= @input.substring(@start, @input.index - 1)
			@token = Token.new(@type, @type_int, @line, @pos, @text, @channel)
		end

    return @token
end

#special_state_transition(s) ⇒ Object 



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# File 'lib/surpass/ExcelFormulaLexer.rb', line 917

def special_state_transition(s)
		-1
end