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#
# irb/ruby-token.rb - ruby tokens
# $Release Version: 0.9.6$
# $Revision: 47298 $
# by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#
# :stopdoc:
module RubyToken
EXPR_BEG = :EXPR_BEG
EXPR_MID = :EXPR_MID
EXPR_END = :EXPR_END
EXPR_ARG = :EXPR_ARG
EXPR_FNAME = :EXPR_FNAME
EXPR_DOT = :EXPR_DOT
EXPR_CLASS = :EXPR_CLASS
class Token
def initialize(seek, line_no, char_no)
@seek = seek
@line_no = line_no
@char_no = char_no
end
attr_reader :seek, :line_no, :char_no
end
class TkNode < Token
def initialize(seek, line_no, char_no)
super
end
attr_reader :node
end
class TkId < Token
def initialize(seek, line_no, char_no, name)
super(seek, line_no, char_no)
@name = name
end
attr_reader :name
end
class TkVal < Token
def initialize(seek, line_no, char_no, value = nil)
super(seek, line_no, char_no)
@value = value
end
attr_reader :value
end
class TkOp < Token
attr_accessor :name
end
class TkOPASGN < TkOp
def initialize(seek, line_no, char_no, op)
super(seek, line_no, char_no)
op = TkReading2Token[op][0] unless op.kind_of?(Symbol)
@op = op
end
attr_reader :op
end
class TkUnknownChar < Token
def initialize(seek, line_no, char_no, id)
super(seek, line_no, char_no)
@name = name
end
attr_reader :name
end
class TkError < Token
end
def Token(token, value = nil)
case token
when String
if (tk = TkReading2Token[token]).nil?
IRB.fail TkReading2TokenNoKey, token
end
tk = Token(tk[0], value)
if tk.kind_of?(TkOp)
tk.name = token
end
return tk
when Symbol
if (tk = TkSymbol2Token[token]).nil?
IRB.fail TkSymbol2TokenNoKey, token
end
return Token(tk[0], value)
else
if (token.ancestors & [TkId, TkVal, TkOPASGN, TkUnknownChar]).empty?
token.new(@prev_seek, @prev_line_no, @prev_char_no)
else
token.new(@prev_seek, @prev_line_no, @prev_char_no, value)
end
end
end
TokenDefinitions = [
[:TkCLASS, TkId, "class", EXPR_CLASS],
[:TkMODULE, TkId, "module", EXPR_BEG],
[:TkDEF, TkId, "def", EXPR_FNAME],
[:TkUNDEF, TkId, "undef", EXPR_FNAME],
[:TkBEGIN, TkId, "begin", EXPR_BEG],
[:TkRESCUE, TkId, "rescue", EXPR_MID],
[:TkENSURE, TkId, "ensure", EXPR_BEG],
[:TkEND, TkId, "end", EXPR_END],
[:TkIF, TkId, "if", EXPR_BEG, :TkIF_MOD],
[:TkUNLESS, TkId, "unless", EXPR_BEG, :TkUNLESS_MOD],
[:TkTHEN, TkId, "then", EXPR_BEG],
[:TkELSIF, TkId, "elsif", EXPR_BEG],
[:TkELSE, TkId, "else", EXPR_BEG],
[:TkCASE, TkId, "case", EXPR_BEG],
[:TkWHEN, TkId, "when", EXPR_BEG],
[:TkWHILE, TkId, "while", EXPR_BEG, :TkWHILE_MOD],
[:TkUNTIL, TkId, "until", EXPR_BEG, :TkUNTIL_MOD],
[:TkFOR, TkId, "for", EXPR_BEG],
[:TkBREAK, TkId, "break", EXPR_END],
[:TkNEXT, TkId, "next", EXPR_END],
[:TkREDO, TkId, "redo", EXPR_END],
[:TkRETRY, TkId, "retry", EXPR_END],
[:TkIN, TkId, "in", EXPR_BEG],
[:TkDO, TkId, "do", EXPR_BEG],
[:TkRETURN, TkId, "return", EXPR_MID],
[:TkYIELD, TkId, "yield", EXPR_END],
[:TkSUPER, TkId, "super", EXPR_END],
[:TkSELF, TkId, "self", EXPR_END],
[:TkNIL, TkId, "nil", EXPR_END],
[:TkTRUE, TkId, "true", EXPR_END],
[:TkFALSE, TkId, "false", EXPR_END],
[:TkAND, TkId, "and", EXPR_BEG],
[:TkOR, TkId, "or", EXPR_BEG],
[:TkNOT, TkId, "not", EXPR_BEG],
[:TkIF_MOD, TkId],
[:TkUNLESS_MOD, TkId],
[:TkWHILE_MOD, TkId],
[:TkUNTIL_MOD, TkId],
[:TkALIAS, TkId, "alias", EXPR_FNAME],
[:TkDEFINED, TkId, "defined?", EXPR_END],
[:TklBEGIN, TkId, "BEGIN", EXPR_END],
[:TklEND, TkId, "END", EXPR_END],
[:Tk__LINE__, TkId, "__LINE__", EXPR_END],
[:Tk__FILE__, TkId, "__FILE__", EXPR_END],
[:TkIDENTIFIER, TkId],
[:TkFID, TkId],
[:TkGVAR, TkId],
[:TkCVAR, TkId],
[:TkIVAR, TkId],
[:TkCONSTANT, TkId],
[:TkINTEGER, TkVal],
[:TkFLOAT, TkVal],
[:TkSTRING, TkVal],
[:TkXSTRING, TkVal],
[:TkREGEXP, TkVal],
[:TkSYMBOL, TkVal],
[:TkDSTRING, TkNode],
[:TkDXSTRING, TkNode],
[:TkDREGEXP, TkNode],
[:TkNTH_REF, TkNode],
[:TkBACK_REF, TkNode],
[:TkUPLUS, TkOp, "+@"],
[:TkUMINUS, TkOp, "-@"],
[:TkPOW, TkOp, "**"],
[:TkCMP, TkOp, "<=>"],
[:TkEQ, TkOp, "=="],
[:TkEQQ, TkOp, "==="],
[:TkNEQ, TkOp, "!="],
[:TkGEQ, TkOp, ">="],
[:TkLEQ, TkOp, "<="],
[:TkANDOP, TkOp, "&&"],
[:TkOROP, TkOp, "||"],
[:TkMATCH, TkOp, "=~"],
[:TkNMATCH, TkOp, "!~"],
[:TkDOT2, TkOp, ".."],
[:TkDOT3, TkOp, "..."],
[:TkAREF, TkOp, "[]"],
[:TkASET, TkOp, "[]="],
[:TkLSHFT, TkOp, "<<"],
[:TkRSHFT, TkOp, ">>"],
[:TkCOLON2, TkOp],
[:TkCOLON3, TkOp],
[:TkASSOC, TkOp, "=>"],
[:TkQUESTION, TkOp, "?"], #?
[:TkCOLON, TkOp, ":"], #:
[:TkfLPAREN], # func( #
[:TkfLBRACK], # func[ #
[:TkfLBRACE], # func{ #
[:TkSTAR], # *arg
[:TkAMPER], # &arg #
[:TkSYMBEG], # :SYMBOL
[:TkGT, TkOp, ">"],
[:TkLT, TkOp, "<"],
[:TkPLUS, TkOp, "+"],
[:TkMINUS, TkOp, "-"],
[:TkMULT, TkOp, "*"],
[:TkDIV, TkOp, "/"],
[:TkMOD, TkOp, "%"],
[:TkBITOR, TkOp, "|"],
[:TkBITXOR, TkOp, "^"],
[:TkBITAND, TkOp, "&"],
[:TkBITNOT, TkOp, "~"],
[:TkNOTOP, TkOp, "!"],
[:TkBACKQUOTE, TkOp, "`"],
[:TkASSIGN, Token, "="],
[:TkDOT, Token, "."],
[:TkLPAREN, Token, "("], #(exp)
[:TkLBRACK, Token, "["], #[arry]
[:TkLBRACE, Token, "{"], #{hash}
[:TkRPAREN, Token, ")"],
[:TkRBRACK, Token, "]"],
[:TkRBRACE, Token, "}"],
[:TkCOMMA, Token, ","],
[:TkSEMICOLON, Token, ";"],
[:TkCOMMENT],
[:TkRD_COMMENT],
[:TkSPACE],
[:TkNL],
[:TkEND_OF_SCRIPT],
[:TkBACKSLASH, TkUnknownChar, "\\"],
[:TkAT, TkUnknownChar, "@"],
[:TkDOLLAR, TkUnknownChar, "$"],
]
# {reading => token_class}
# {reading => [token_class, *opt]}
TkReading2Token = {}
TkSymbol2Token = {}
def RubyToken.def_token(token_n, super_token = Token, reading = nil, *opts)
token_n = token_n.id2name if token_n.kind_of?(Symbol)
if RubyToken.const_defined?(token_n)
IRB.fail AlreadyDefinedToken, token_n
end
token_c = eval("class #{token_n} < #{super_token}; end; #{token_n}")
if reading
if TkReading2Token[reading]
IRB.fail TkReading2TokenDuplicateError, token_n, reading
end
if opts.empty?
TkReading2Token[reading] = [token_c]
else
TkReading2Token[reading] = [token_c].concat(opts)
end
end
TkSymbol2Token[token_n.intern] = token_c
end
for defs in TokenDefinitions
def_token(*defs)
end
end
# :startdoc:
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