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global GblActionParams: bool = false
global GblSectionPass: bool = false

bool action_params_find( Machine: str, Action: str )
= cc_action_params_find

bool action_params_insert( Machine: str, Action: str )
= cc_action_params_insert

rl ident
	/( alpha | '_' ) ( alpha | digit | '_' )*/

rl number
	/ digit+ /

rl hex_number
	/ '0x' [0-9a-fA-F]+ /

rl hex_char
	/ '0x' [0-9a-fA-F]{2}  /

## Optimization for hex chars that appear near to each other. Converts the
## string of 2-digit hex chars into a single string. The parse tree walker
## concatenates the chars.
#rl hex_string /
#	hex_char
#	(
#		(
#			[\t\n ]+ |
#			[\t\n ]* '.' [\t\n ]*
#		)
#		hex_char
#	)+
#/

rl NL / '\n' /

rl c_comment 
	/ '/*' ( any | NL )* :>> '*/' /

rl cpp_comment
	/ '//' [^\n]* NL /

rl ruby_comment
	/ '#' [^\n]* NL /

rl s_literal
	/ "'" ([^'\\\n] | '\\' (any | NL))* "'" /

rl d_literal
	/ '"' ([^"\\] | NL | '\\' (any | NL))* '"' /

rl host_re_literal
	/ '/' ([^/\\] | NL | '\\' (any | NL))* '/' /

namespace srlex
	lex
		ignore /[\t\n ]+/
		literal `:: `; `)
		token word /[a-zA-Z_][a-zA-Z0-9_]*/
	end
end

struct machine
	Name: str
	ActionParams: map<str, str>
end

global MachineMap: map<str, machine> = new map<str, machine>()
global CurMachine: machine

global Lang: str

lex
	token select /''/
	{
		if Lang == "ruby"
			input->push( make_token( typeid<ruby_select>, '' ) )
		elsif Lang == "ocaml"
			input->push( make_token( typeid<ocaml_select>, '' ) )
		elsif Lang == "crack"
			input->push( make_token( typeid<crack_select>, '' ) )
		else
			input->push( make_token( typeid<c_select>, '' ) )
	}

	token c_select //
	token ruby_select //
	token ocaml_select //
	token crack_select //
end


namespace ragel
	lex
		literal `}%% -ni

		ignore /[\t\n ]+/
		ignore /'#' any* :> '\n'/

		literal `^ `| `- `, `: `! `? `.
		literal `( `) `{ -ni ni- `} `* `& `+

		literal `-- `:> `:>> `<: `-> `**

		literal `|* `*| `=> 

		literal `@ `> `< `% `$
		literal `from `to `eof `lerr `err
		literal `when `inwhen `outwhen `>? `$? `%? 

		literal `:= `|= `= `; `.. `../i `::

		literal `>~ `$~ `%~ `<~ `@~ `<>~ 
		literal `>* `$* `%* `<* `@* `<>* 
		literal `>/ `$/ `%/ `</ `@/ `<>/ 
		literal `>! `$! `%! `<! `@! `<>! 
		literal `>^ `$^ `%^ `<^ `@^ `<>^ 
		literal `<>

		literal `machine `action `variable `alphtype
				`access `write `getkey `export `import
				`include `prepush `postpop `nfaprepush `nfapostpop

		literal `:nfa `:cond `:condplus `:condstar `):

		token string /
			'"' ( [^"\\] | '\\' any )* '"' 'i'? |
			"'" ( [^'\\] | '\\' any )* "'" 'i'?
		/

		# token hex_string / hex_string /

		token lex_regex_open /'/'/ -ni
		token lex_sqopen_pos /'['/ -ni
		token lex_sqopen_neg /'[^'/ -ni

		token word / [a-zA-Z_][a-zA-Z0-9_]* /
		token uint / number /
		token hex / hex_number /
	end 

	lex
		token re_dot / '.' /
		token re_star / '*' /
		token re_char / ^( '\\' | '.' | '*' | '[' | '/' ) | '\\' . any /
		token re_close / '/' 'i'? /
		token re_sqopen_pos /'['/
		token re_sqopen_neg /'[^'/
	end

	lex
		token re_or_dash / '-' /
		token re_or_char / ^( '\\' | '-' | ']' ) | '\\' . any /
		token re_or_sqclose / ']' /
	end

	# Not cannot start with '{', terminated by ';', rewritten into { inline_expr }
	token _inline_expr_reparse
		/[^{;] [^;]* ';'/ {
			R: str = input->pull( match_length - 1 )
			input->pull( 1 )
			input->push( "}" )
			input->push( R )
			input->push( "{" )
		}

	token variable_name /ident/

	def inline_expr_reparse
		[_inline_expr_reparse] :Reparse
	|	[action_expr] :ActionExpr

	def join
		[join `, expression] :Rec
	|	[expression] :Base

	def expression
		[expr_left expression_op_list] :Expression
	
	def expression_op_list
		[expression_op expression_op_list] :Op
	|	[] :Empty

	def expression_op
		[`| term] :Or
	|	[`& term] :And
	|	[`- term] :Sub
	|	[`-- term] :Ssub

	def expr_left
		[term] :Term

	def term
		[term_left term_op_list_short] :Term
	
	def term_left
		[factor_label] :FactorLabel

	# This list is done manually to get shortest match.
	def term_op_list_short
		[] :Empty
	|	[term_op term_op_list_short] :Terms

	def term_op
		[factor_label] :None
	|	[`. factor_label] :Dot
	|	[`:> factor_label] :ColonLt
	|	[`:>> factor_label] :ColonLtLt
	|	[`<: factor_label] :GtColon

	def factor_label
		[word `: factor_label] :Label
	|	[factor_ep] :Ep

	def factor_ep
		[factor_aug `-> epsilon_target] :Epsilon
	|	[factor_aug] :Base

	def epsilon_target
		[epsilon_target `:: word] :Rec
	|	[word] :Base

	def action_expr
		[`{ c_select     CInlineExpr: c_inline::inline_expr c_inline::`}] :C
	|	[`{ ruby_select  RubyInlineExpr: ruby_inline::inline_expr ruby_inline::`}]
	|	[`{ ocaml_select OCamlInlineExpr: ocaml_inline::inline_expr ocaml_inline::`}]
	|	[`{ crack_select CrackInlineExpr: crack_inline::inline_expr crack_inline::`}]

	def action_block
		[`{ c_select     CInlineBlock: c_inline::inline_block c_inline::`}] :C
	|	[`{ ruby_select  RubyInlineBlock: ruby_inline::inline_block ruby_inline::`}]
	|	[`{ ocaml_select OCamlInlineBlock: ocaml_inline::inline_block ocaml_inline::`}]
	|	[`{ crack_select CrackInlineBlock: crack_inline::inline_block crack_inline::`}]

	def action_arg_list
		[action_arg_list `, action_ref] :Rec
	|	[action_ref] :Base

	def opt_action_arg_list
		[action_arg_list] :List
	|	[] :Empty

	def named_action_ref
		[word] :Plain
		{
			if ! GblSectionPass {
				if action_params_find( CurMachine->Name, $lhs.word )
					reject
			}
		}
	|	[word `( opt_action_arg_list `)] :Args
		{
			if ! GblSectionPass {
				if ! action_params_find( CurMachine->Name, $lhs.word )
					reject
			}
		}

	def action_ref 
		[named_action_ref] :NamedRef
	|	[`( named_action_ref `)] :ParenNamed
	|	[action_block] :Block
	
	def priority_name
		[word] :Word

	def error_name
		[word] :Word

	def priority_aug
		[uint] :NoSign
	|	[`+ uint] :Plus
	|	[`- uint] :Minus

	def aug_base
		[`@] :Finish | [`>] :Enter | [`%] :Leave | [`$] :All

	def aug_cond
		[`>?] :Start1 | [`$?] :All1 | [`%?] :Leave1
	|	[`> `when] :Start2 | [`$ `when] :All2 | [`% `when] :Leave2
	|	[`inwhen] :Start3 | [`when] :All3 | [`outwhen] :Leave3

	def aug_to_state
		[`>~] :Start1 | [`<~] :NotStart1 | [`$~] :All1
	|	[`%~] :Final1 | [`@~] :NotFinal1 | [`<>~] :Middle1
	|	[`> `to] :Start2 | [`< `to] :NotStart2 | [`$ `to] :All2
	|	[`% `to] :Final2 | [`@ `to] :NotFinal2 | [`<> `to] :Middle2

	def aug_from_state
		[`>*] :Start1 | [`<*] :NotStart1 | [`$*] :All1
	|	[`%*] :Final1 | [`@*] :NotFinal1 | [`<>*] :Middle1
	|	[`> `from] :Start2 | [`< `from] :NotStart2 | [`$ `from] :All2
	|	[`% `from] :Final2 | [`@ `from] :NotFinal2 | [`<> `from] :Middle2

	def aug_eof
		[`>/] :Start1 | [`</] :NotStart1 | [`$/] :All1
	|	[`%/] :Final1 | [`@/] :NotFinal1 | [`<>/] :Middle1
	|	[`> `eof] :Start2 | [`< `eof] :NotStart2 | [`$ `eof] :All2
	|	[`% `eof] :Final2 | [`@ `eof] :NotFinal2 | [`<> `eof] :Middle2

	def aug_gbl_error
		[`>!] :Start1 | [`<!] :NotStart1 | [`$!] :All1
	|	[`%!] :Final1 | [`@!] :NotFinal1 | [`<>!] :Middle1
	|	[`> `err] :Start2 | [`< `err] :NotStart2 | [`$ `err] :All2
	|	[`% `err] :Final2 | [`@ `err] :NotFinal2 | [`<> `err] :Middle2

	def aug_local_error
		[`>^] :Start1 | [`<^] :NotStart1 | [`$^] :All1
	|	[`%^] :Final1 | [`@^] :NotFinal1 | [`<>^] :Middle1
	|	[`> `lerr] :Start2 | [`< `lerr] :NotStart2 | [`$ `lerr] :All2
	|	[`% `lerr] :Final2 | [`@ `lerr] :NotFinal2 | [`<> `lerr] :Middle2

	def factor_aug
		[factor_aug aug_base action_ref] :ActionRef
	|	[factor_aug aug_base priority_aug] :PriorEmbed
	|	[factor_aug aug_base `( priority_name `, priority_aug `)] :NamedPriorEmbed
	|	[factor_aug aug_cond action_ref] :CondEmbed
	|	[factor_aug aug_cond `! action_ref] :NegCondEmbed
	|	[factor_aug aug_to_state action_ref] :ToStateAction
	|	[factor_aug aug_from_state action_ref] :FromStateAction
	|	[factor_aug aug_eof action_ref] :EofAction
	|	[factor_aug aug_gbl_error action_ref] :GblErrorAction
	|	[factor_aug aug_local_error action_ref] :LocalErrorDef
	|	[factor_aug aug_local_error `( error_name `, action_ref `)] :LocalErrorName
	|	[factor_rep] :Base

	def factor_rep 
		[factor_neg factor_rep_op_list] :Op

	def factor_rep_op_list
		[factor_rep_op factor_rep_op_list] :Rec
	|	[] :Base

	def factor_rep_op
		[`*] :Star
	|	[`**] :StarStar
	|	[`?] :Optional
	|	[`+] :Plus
	|	[`{ factor_rep_num `}] :ExactRep
	|	[`{ `, factor_rep_num `}] :MaxRep
	|	[`{ factor_rep_num `, `}] :MinRep
	|	[`{ LowRep: factor_rep_num `, HighRep: factor_rep_num `}] :RangeRep

	def factor_rep_num
		[uint] :RepNum

	def factor_neg 
		[`! factor_neg] :Bang
	|	[`^ factor_neg] :Caret
	|	[factor] :Base

	def opt_max_arg
		[`, action_ref] :Action
	|	[] :Empty

	def nfastar
		[`:nfa]

	def colon_cond
		[`:cond] :Cond
	|	[`:condstar] :CondStar
	|	[`:condplus] :CondPlus

	def factor 
		[alphabet_num] :AlphabetNum
	|	[word] :Word
	|	[string] :String
	#|	[hex_string] :HexString
	|	[lex_sqopen_pos reg_or_data re_or_sqclose] :PosOrBlock
	|	[lex_sqopen_neg reg_or_data re_or_sqclose] :NegOrBlock
	|	[lex_regex_open regex re_close] :Regex
	|	[RL1: range_lit `.. RL2: range_lit]   :Range
	|	[RL1: range_lit `../i RL2: range_lit] :RangeIndep
	|	[nfastar  `( expression `,
			Push: action_ref `, Pop: action_ref `, Init: action_ref `, Stay: action_ref `,
			Repeat: action_ref `, Exit: action_ref `):] :Nfa
	|	[colon_cond `( expression `, 
			Init: action_ref `, Inc: action_ref `, Min: action_ref OptMax: opt_max_arg `):] :Cond
	|	[`( join `)] :Join

	def regex
		[reg_item_rep_list] :List
	
	def reg_item_rep_list
		[reg_item_rep_list reg_item_rep] :Rec
	|	[] :Base

	def reg_item_rep
		[reg_item re_star] :Star
	|	[reg_item] :Base

	def reg_item
		[re_sqopen_pos reg_or_data re_or_sqclose] :PosOrBlock
	|	[re_sqopen_neg reg_or_data re_or_sqclose] :NegOrBlock
	|	[re_dot] :Dot
	|	[re_char] :Char

	def reg_or_data
		[reg_or_data reg_or_char] :Data
	|	[] :Base

	def reg_or_char
		[re_or_char] :Char
	|	[Low: re_or_char re_or_dash High: re_or_char] :Range

	def range_lit
		[string] :String
	|	[alphabet_num] :AN

	def alphabet_num 
		[uint] :Uint
	|	[`- uint] :Neg
	|	[hex] :Hex

	def lm_act
		[`=> action_ref] :ActionRef
	|	[action_block] :ActionBlock

	def opt_lm_act
		[lm_act] :Act
	|	[] :Empty

	def lm_stmt
		[join opt_lm_act `;] :LmStmt commit
	|	[assignment] :Assignment
	|	[action_spec] :ActionSpec

	def lm_stmt_list
		[lm_stmt_list lm_stmt] :Rec
	|	[lm_stmt] :Base

	def lm
		[join] :Join
	|	[`|* lm_stmt_list `*|] :Lm

	#
	# Actions
	#
	def action_param
		[word] :Word

	def action_param_list
		[action_param_list `, action_param] :Rec
	|	[action_param] :Base

	def opt_action_param_list
		[action_param_list] :List
	|	[] :Empty

	def action_params
		[`( opt_action_param_list `)] :List
		{
			GblActionParams = true
		}

	def action_spec
		[`action word action_params action_block] :ActionSpecParams commit
		{
			if ! GblSectionPass {
				# Track that this action has params so we can parse appropriately
				# when reducing.
				# CurMachine->ActionParams->insert( $lhs.word, $lhs.word )
				action_params_insert( CurMachine->Name, $lhs.word )
			}

			# Reset after parsing the block. 
			GblActionParams = false
		}
	|	[`action word action_block] :ActionSpec commit
		{
			GblActionParams = false
		}

	def def_name
		[word] :Word

	#
	# Machine Instantiations.
	#
	def assignment
		[opt_export def_name `= join `;] :Assignment commit

	def instantiation
		[opt_export def_name `:= lm `;] :Instantiation commit

	def nfa_expr
		[nfa_expr `| term] :Union
	|	[term] :Base

	def nfa_round_spec
		[Depth: uint `, Group: uint] :Spec

	def nfa_round_list
		[nfa_round_list `, nfa_round_spec] :Recurse
	|	[nfa_round_spec] :Base

	def nfa_rounds
		[`( nfa_round_list `)] :Rounds

	def nfa_union
		[def_name `|= nfa_rounds nfa_expr `;] :NfaUnion commit

	def alphtype_type
		[W1: word] :One
	|	[W1: word W2: word] :Two

	def include_spec
		[word] :Machine
	|	[string] :File
	|	[word string] :MachineFile

	def opt_export
		[`export] :Export
	|	[] :Base

	def write_arg
		[word] :Word

	def machine_name
		[`machine word `;] :MachineName
		{
			Machine: machine = MachineMap->find( $lhs.word )

			if !Machine
			{
				Machine = new machine()
				Machine->Name = $lhs.word
				Machine->ActionParams = new map<str, str>()
				MachineMap->insert( Machine->Name, Machine )
			}

			CurMachine = Machine
		}

	def statement
		[assignment] :Assignment
	|	[instantiation] :Instantiation
	|	[nfa_union] :NfaUnion
	|	[action_spec] :ActionSpec
	|	[`prepush action_block] :PrePush commit
	|	[`postpop action_block] :PostPop commit
	|	[`variable variable_name inline_expr_reparse] :Variable commit
	|	[`alphtype alphtype_type `;] :AlphType commit
	|	[`access inline_expr_reparse] :Access commit
	|	[`write Cmd: word ArgList: write_arg* `;] :Write commit
	|	[`getkey inline_expr_reparse] :GetKey commit
	|	[`import string `;] :Import commit
	|	[`include include_spec `;] :Include commit
	|	[`nfaprepush action_block] :NfaPrePush commit
	|	[`nfapostpop action_block] :NfaPostPop commit

	def opt_machine_name
		[machine_name] :MachineName
	|	[] :Empty

	def ragel_start
		[opt_machine_name statement*]
end