aboutsummaryrefslogtreecommitdiff
path: root/frontend/scanner.dcl
blob: 79aec04d0cd845a4cffde0151424f3f08ca0739c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
definition module scanner

import StdEnv, general

::	SearchPaths	:== [String]

::	* ScanState

::	*Input

::	* InputStream

::	LongToken

::	Buffer x

::	FilePosition = {fp_line :: !Int, fp_col :: !Int}

instance <<< FilePosition

::	Token
	= 	IdentToken !.String		//		an identifier
	|	IntToken !.String		//		an integer
	|	RealToken !.String		//		a real
	|	StringToken !.String	//		a string
	|	CharToken !.String		//		a character
	|	CharListToken !.String	//		a character list '{char}*'
	|	BoolToken !Bool			//		a boolean
	|	OpenToken				//		(
	|	CloseToken				//		)
	|	CurlyOpenToken			//		{
	|	CurlyCloseToken			//		}
	|	SquareOpenToken			//		[
	|	SquareCloseToken		//		]

	|	DotToken				//		.
	|	SemicolonToken			//		;
	|	ColonToken				//		:
	|	DoubleColonToken		//		::
	|	CommaToken				//		,
	|	ExclamationToken		//		!
	|	BarToken				//		|
	|	ArrowToken				//		->
	|	DoubleArrowToken		//		=>
	|	EqualToken				//		=
	|	DefinesColonToken		//		=:
	|	ColonDefinesToken		//		:==
	|	WildCardToken			//		_
	|	BackSlashToken			//		\
	|	DoubleBackSlashToken	//		\\
	|	LeftArrowToken			//		<-
	|	LeftArrowColonToken		//		<-:
	|	DotDotToken				//		..
	|	AndToken				//		&
	|	HashToken				//		#
	|	AsteriskToken			//		*
	|	LessThanOrEqualToken	//		<=

	|	ModuleToken				//		module
	|	ImpModuleToken			//		implementation
	|	DefModuleToken			//		definition
	|	SysModuleToken			//		system

	|	ImportToken				//		import
	|	FromToken				//		from
	|	SpecialToken			//		special

	|	IntTypeToken			//		Int
	|	CharTypeToken			//		Char
	|	RealTypeToken			//		Real
	|	BoolTypeToken			//		Bool
	|	StringTypeToken			//		String
	|	FileTypeToken			//		File
	|	WorldTypeToken			//		World
	|	VoidTypeToken			//		Void
	|	LeftAssocToken			//		left
	|	RightAssocToken			//		right
	|	ClassToken				//		class
	|	InstanceToken			//		instance
	|	OtherwiseToken			//		otherwise

	|	IfToken					//		if
	|	WhereToken				//		where
	|	WithToken				//		with
	|	CaseToken				//		case
	|	OfToken					//		of
	|	LetToken Bool			//		let!, let
	|	SeqLetToken Bool		//		Let!, Let
	|	InToken					//		in
	
	|	DynamicToken			//		dynamic
	|	DynamicTypeToken		//		Dynamic

	
	|	PriorityToken Priority	//		infixX N

	|	CodeToken				//		code
	|	InlineToken				//		inline
	|	CodeBlockToken [String]	//		{...}

	|	NewDefinitionToken		//		generated automatically
	|	EndGroupToken			//		generated automatically
	|	EndOfFileToken			//		end of file
	|	ErrorToken String		//		if an error occured
	
:: Context
	=	GeneralContext
	|	TypeContext
	|	FunctionContext
	|	CodeContext

::	Assoc	= LeftAssoc | RightAssoc | NoAssoc

::	Priority = Prio Assoc Int | NoPrio
    
class getFilename state :: !*state -> (!String,!*state)
instance getFilename ScanState

class tokenBack state :: !*state -> !*state
instance tokenBack ScanState

class nextToken state :: !Context !*state -> (!Token, !*state)
instance nextToken ScanState

class currentToken state :: !*state -> (!Token, !*state)
instance currentToken ScanState

class insertToken state :: !Token !Context !*state -> *state
instance insertToken ScanState

class replaceToken state :: !Token !*state -> *state
instance replaceToken ScanState

class getPosition state :: !*state -> (!FilePosition,!*state)  // Position of current Token (or Char)
instance getPosition ScanState

openScanner :: !String !SearchPaths !*Files -> (!Optional ScanState, !*Files)
closeScanner :: !ScanState !*Files -> *Files

setUseLayout :: !Bool !ScanState -> ScanState
UseLayout :: !ScanState -> (!Bool, !ScanState)
dropOffsidePosition :: !ScanState -> ScanState

isLhsStartToken :: ! Token -> Bool
isOffsideToken :: ! Token -> Bool
isEndGroupToken :: ! Token -> Bool

instance == Token

instance <<< Token

instance toString Token, Priority

instance < Priority