generics1.icl 155 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
//**************************************************************************************
// Generic programming features 
//**************************************************************************************

implementation module generics1

import StdEnv
import check
from checktypes import createClassDictionaries
from transform import ::Group
import genericsupport
12
import compilerSwitches
13

14
15
16
17
18
19
20
21
22
//****************************************************************************************
//	tracing
//****************************************************************************************
traceGenerics context message x
	//:== traceValue context message x
	:== x



23
24
25
26
27
28
29
30
31
32
//**************************************************************************************
// Data types
//**************************************************************************************

:: FunDefs :== {#FunDef}
:: Modules :== {#CommonDefs}
:: DclModules :== {#DclModule}
:: Groups :== {!Group}
:: FunsAndGroups :== (!Index, !Index, ![FunDef], ![Group])

33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
:: *GenericState = 
	{ gs_modules :: !*Modules
	, gs_exprh :: !*ExpressionHeap
	, gs_genh :: !*GenericHeap
	, gs_varh :: !*VarHeap
	, gs_tvarh :: !*TypeVarHeap
	, gs_avarh :: !*AttrVarHeap 
	, gs_error :: !*ErrorAdmin
	, gs_symtab :: !*SymbolTable
	, gs_dcl_modules :: !*DclModules
	, gs_td_infos :: !*TypeDefInfos
	, gs_funs :: !*{#FunDef}
	, gs_groups :: {!Group}
	// non-unique, read only
	, gs_predefs :: !PredefinedSymbols
	, gs_main_module :: !Index
	, gs_used_modules :: !NumberSet
	}


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
//**************************************************************************************
// Exported functions
//**************************************************************************************

convertGenerics :: 
		!Int 					// index of the main dcl module
		!NumberSet				// set of used modules
		!{#CommonDefs} 			// common definitions of all modules
		!{!Group} 				// groups of functions
		!*{# FunDef} 			// functions
		!*TypeDefInfos 			// type definition information of all modules
		!*Heaps 				// all heaps
		!*HashTable 			// needed for what creating class dictionaries
		!*PredefinedSymbols 	// predefined symbols
		!u:{# DclModule}		// dcl modules
		!*ErrorAdmin 			// to report errors
	->  ( !{#CommonDefs}		// common definitions of all modules
		, !{!Group}				// groups of functions
		, !*{# FunDef}			// function definitions
		, ![IndexRange]			// index ranges of generated functions
		, !*TypeDefInfos		// type definition infos
		, !*Heaps				// all heaps
		, !*HashTable			// needed for creating class dictinaries
		, !*PredefinedSymbols	// predefined symbols	
		, !u:{# DclModule}		// dcl modules
		, !*ErrorAdmin			// to report errors
		)
convertGenerics
		main_dcl_module_n 
		used_module_numbers
		modules 
		groups 
		funs 
		td_infos 
		heaps
		hash_table 
		u_predefs 
		dcl_modules 
		error

	//#! td_infos = td_infos ---> "************************* generic phase started ******************** "
	//#! funs = dump_funs 0 funs
	//#! dcl_modules = dump_dcl_modules 0 dcl_modules
		
	#! modules = {x \\ x <-: modules} 			// unique copy
	#! dcl_modules = { x \\ x <-: dcl_modules } 	// unique copy
	#! size_predefs = size u_predefs
	#! (predefs, u_predefs) = arrayCopyBegin u_predefs size_predefs // non-unique copy

	#! td_infos = clearTypeDefInfos td_infos
		//---> ("used module numbers ", main_dcl_module_n, numberSetToList used_module_numbers)
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
	#! (modules, heaps) = clearGenericDefs modules heaps

	# {hp_var_heap, hp_generic_heap, hp_type_heaps={th_vars, th_attrs}, hp_expression_heap} = heaps
	# gs = 
		{ gs_modules = modules
		, gs_symtab = hash_table.hte_symbol_heap
		, gs_dcl_modules = dcl_modules
		, gs_td_infos = td_infos
		, gs_exprh = hp_expression_heap	
		, gs_genh = hp_generic_heap	
		, gs_varh = hp_var_heap
		, gs_tvarh = th_vars
		, gs_avarh = th_attrs
		, gs_error = error	
		, gs_funs = funs
		, gs_groups = groups	
		, gs_predefs = predefs
		, gs_main_module = main_dcl_module_n
		, gs_used_modules = used_module_numbers
		} 

	# (generic_ranges, gs) = convert_generics gs

	#	{ 	gs_modules = modules, gs_symtab, gs_dcl_modules = dcl_modules, gs_td_infos = td_infos, 
			gs_genh = hp_generic_heap, gs_varh = hp_var_heap, gs_tvarh = th_vars, gs_avarh = th_attrs, 
			gs_exprh = hp_expression_heap,	
			gs_error = error, gs_funs = funs, gs_groups = groups,
			gs_predefs = predefs, gs_main_module = main_dcl_module_n, gs_used_modules = used_module_numbers} = gs
	#! hash_table = { hash_table & hte_symbol_heap = gs_symtab }
	#! heaps = 
		{ hp_expression_heap = hp_expression_heap
		, hp_var_heap = hp_var_heap
		, hp_generic_heap = hp_generic_heap
		, hp_type_heaps = { th_vars = th_vars, th_attrs = th_attrs }
		}	
		
140
141
142
143
	//#! funs = dump_funs 0 funs
	//#! dcl_modules = dump_dcl_modules 0 dcl_modules
	//#! error = error ---> "************************* generic phase completed ******************** "
	//| True = abort "generic phase aborted for testing\n"		
144
	= (modules, groups, funs, generic_ranges, td_infos, heaps, hash_table, u_predefs, dcl_modules, error)
145
146
where

147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
	convert_generics :: !*GenericState -> (![IndexRange], !*GenericState)
	convert_generics gs		
		#! (iso_range, gs) = buildGenericRepresentations gs
		#! (ok, gs) = gs_ok gs
		| not ok = ([], gs)	
		
		#! gs = buildClasses gs			
		#! (ok, gs) = gs_ok gs
		| not ok = ([], gs)	

		#! (instance_range, gs) = convertGenericCases gs
		#! (ok, gs) = gs_ok gs
		| not ok = ([], gs)	

		#! gs = convertGenericTypeContexts gs

		= ([iso_range,instance_range], gs)

	gs_ok :: !*GenericState -> (!Bool, !*GenericState)
	gs_ok gs=:{gs_error} 
		#! ok = gs_error.ea_ok
		= (ok, {gs & gs_error = gs_error})

170
171
172
	dump_funs n funs 
		| n == size funs
			= funs
173
			#! ({fun_ident, fun_type, fun_body}, funs) = funs ! [n]
174
			#! funs = funs
175
				//---> ("icl function ", fun_ident, n, fun_type, fun_body) 
176
177
178
179
180
181
182
183
184
185
			=  dump_funs (inc n) funs
	dump_dcl_modules n dcl_modules
		| n == size dcl_modules
			= dcl_modules			
			# ({dcl_functions}, dcl_modules) = dcl_modules ! [n]				
			= dump_dcl_modules (inc n) (dump_dcl_funs 0 dcl_functions dcl_modules)
				//---> ("dcl module", n)		
	dump_dcl_funs n dcl_funs dcl_modules
		| n == size dcl_funs
			= dcl_modules
186
			# {ft_ident, ft_type} = dcl_funs.[n]
187
			= dump_dcl_funs (inc n) dcl_funs dcl_modules
188
				//---> ("dcl function", ft_ident, n, ft_type)
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203


//****************************************************************************************
// clear stuff that might have been left over
// from compilation of other icl modules
//****************************************************************************************

clearTypeDefInfos td_infos
	= clear_modules 0 td_infos
where
	clear_modules n td_infos
		| n == size td_infos
			= td_infos
			#! (td_infos1, td_infos) = replace td_infos n {}
			#! td_infos1 = clear_td_infos 0 td_infos1
204
			#! td_infos = {td_infos & [n]=td_infos1}
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
			= clear_modules (inc n) td_infos 
			
	clear_td_infos n td_infos 			
		| n == size td_infos
			= td_infos
			#! (td_info, td_infos) = td_infos![n]
			#! td_infos = {td_infos & [n] = {td_info & tdi_gen_rep = No}}
			= clear_td_infos (inc n) td_infos 

clearGenericDefs modules heaps
	= clear_module 0 modules  heaps
where	
	clear_module n modules heaps
		| n == size modules
			= (modules, heaps)
			#! ({com_generic_defs}, modules) = modules![n]
			#! (com_generic_defs, heaps) = updateArraySt clear_generic_def {x\\x<-:com_generic_defs} heaps 			
			#! modules = {modules & [n].com_generic_defs = com_generic_defs}
			= clear_module (inc n) modules heaps
			
225
	clear_generic_def _ generic_def=:{gen_ident,gen_info_ptr} heaps=:{hp_generic_heap}
226
		#! (gen_info, hp_generic_heap) = readPtr gen_info_ptr hp_generic_heap
227
		#! gen_info = { gen_info & gen_classes = createArray 32 [] }
228
229
230
231
232
233
234
235
236
		#! hp_generic_heap = writePtr gen_info_ptr gen_info hp_generic_heap
		= (generic_def, {heaps & hp_generic_heap = hp_generic_heap})
		
//****************************************************************************************
//	generic type representation
//****************************************************************************************

// generic representation is built for each type argument of
// generic cases of the current module
237
238
239
240
241
buildGenericRepresentations :: !*GenericState -> (!IndexRange, !*GenericState)
buildGenericRepresentations gs=:{gs_main_module, gs_modules, gs_funs, gs_groups}
	#! (size_funs, gs_funs) = usize gs_funs
	#! size_groups = size gs_groups
	#! ({com_gencase_defs}, gs_modules) = gs_modules ! [gs_main_module]
242
	
243
244
245
	#! gs = { gs & gs_modules = gs_modules, gs_funs = gs_funs, gs_groups = gs_groups }			
	#! ((new_fun_index, new_group_index, new_funs, new_groups), gs) 
		= foldArraySt on_gencase com_gencase_defs ((size_funs, size_groups, [], []), gs)
246

247
248
249
	# {gs_funs, gs_groups} = gs
	#! gs_funs = arrayPlusRevList gs_funs new_funs
	#! gs_groups = arrayPlusRevList gs_groups new_groups
250
251
252

	#! range = {ir_from = size_funs, ir_to = new_fun_index}

253
	= (range, {gs & gs_funs = gs_funs, gs_groups = gs_groups})
254
255
where 

256
	on_gencase index 
257
258
			case_def=:{gc_type_cons=TypeConsSymb {type_index={glob_module,glob_object}, type_ident},
			 	gc_ident, gc_body=GCB_FunIndex fun_index, gc_pos} 
259
260
261
			(funs_and_groups, gs=:{gs_modules, gs_td_infos, gs_funs})
		#! (type_def, gs_modules) = gs_modules![glob_module].com_type_defs.[glob_object]
		#! (td_info, gs_td_infos) = gs_td_infos![glob_module, glob_object]
262
		#! type_def_gi = {gi_module=glob_module,gi_index=glob_object}
263
264
265
266
267
268
269
270
271
272
273
274
275
		#! ({fun_body}, gs_funs) = gs_funs ! [fun_index]
		#! gs = {gs & gs_modules = gs_modules, gs_td_infos = gs_td_infos, gs_funs = gs_funs}
		
		= case fun_body of
			TransformedBody _ 
				// does not need a generic representation
				-> (funs_and_groups, gs)
				
			GeneratedBody	
				// needs a generic representation
				
				-> case type_def.td_rhs of
					SynType _
276
						#  gs_error = reportError gc_ident gc_pos ("cannot derive a generic instance for a synonym type " +++ type_def.td_ident.id_name) gs.gs_error
277
278
						-> (funs_and_groups, {gs & gs_error = gs_error})	
					AbstractType _
279
						#  gs_error = reportError gc_ident gc_pos ("cannot derive a generic instance for an abstract type "  +++ type_def.td_ident.id_name) gs.gs_error
280
281
282
283
284
						-> (funs_and_groups, {gs & gs_error = gs_error})	
					_ 
						-> case td_info.tdi_gen_rep of
							Yes _ 
								-> (funs_and_groups, gs)
285
									//---> ("generic representation is already built", type_ident)
286
287
288
289
290
291
292
293
294
							No 
								#! (gen_type_rep, funs_and_groups, gs)
									= buildGenericTypeRep type_def_gi funs_and_groups gs
				
								#! td_info = {td_info & tdi_gen_rep = Yes gen_type_rep}
								# {gs_td_infos} = gs	
								#! gs_td_infos = {gs_td_infos & [glob_module, glob_object] = td_info} 
								# gs = {gs & gs_td_infos = gs_td_infos }
								-> (funs_and_groups, gs)					
295
									//---> ("build generic representation", type_ident)
296
297
298
	on_gencase _ _ st = st

:: ConsInfo = {ci_cons_info :: DefinedSymbol, ci_field_infos :: [DefinedSymbol]}
299
300
301
302
	
buildGenericTypeRep :: 
		!GlobalIndex 			// type def index
		!(!Index,!Index,![FunDef],![Group]) 
303
		!*GenericState 
304
305
	->	( !GenericTypeRep
		, !(!Index, !Index, ![FunDef], ![Group])
306
		, !*GenericState
307
		)
308
309
310
311
312
313
314
315
316
317
318
319
320
buildGenericTypeRep type_index funs_and_groups
		gs=:{gs_modules, gs_predefs, gs_main_module, gs_error, gs_td_infos,
			gs_exprh, gs_varh, gs_genh, gs_avarh, gs_tvarh}
		
	# heaps = 
		{ hp_expression_heap = gs_exprh
		, hp_var_heap = gs_varh
		, hp_generic_heap = gs_genh
		, hp_type_heaps = { th_vars = gs_tvarh, th_attrs = gs_avarh }
		}	
		
	# (type_def, gs_modules) = gs_modules![type_index.gi_module].com_type_defs.[type_index.gi_index]

Artem Alimarine's avatar
Artem Alimarine committed
321
	# (type_info, cons_infos, funs_and_groups, gs_modules, heaps, gs_error) 
322
323
		= buildTypeDefInfo type_index.gi_module type_def gs_main_module gs_predefs funs_and_groups gs_modules heaps gs_error

Artem Alimarine's avatar
Artem Alimarine committed
324
	# (atype, (gs_modules, gs_td_infos, heaps, gs_error)) 
Artem Alimarine's avatar
Artem Alimarine committed
325
		= buildStructType type_index type_info cons_infos gs_predefs (gs_modules, gs_td_infos, heaps, gs_error)
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
	
	# (from_fun_ds, funs_and_groups, heaps, gs_error)
		= buildConversionFrom type_index.gi_module type_def gs_main_module gs_predefs funs_and_groups heaps gs_error

	# (to_fun_ds, funs_and_groups, heaps, gs_error)
		= buildConversionTo type_index.gi_module type_def gs_main_module gs_predefs funs_and_groups heaps gs_error

	# (iso_fun_ds, funs_and_groups, heaps, gs_error)
		= buildConversionIso type_def from_fun_ds to_fun_ds gs_main_module gs_predefs funs_and_groups heaps gs_error

	# {hp_expression_heap, hp_var_heap, hp_generic_heap, hp_type_heaps={th_vars, th_attrs}} = heaps
	# gs =
		{ gs 
		& gs_modules = gs_modules
		, gs_td_infos = gs_td_infos
		, gs_error = gs_error
		, gs_avarh = th_attrs
		, gs_tvarh = th_vars
		, gs_varh = hp_var_heap
		, gs_genh = hp_generic_heap
		, gs_exprh = hp_expression_heap
		}
	= ({gtr_type=atype,gtr_iso=iso_fun_ds}, funs_and_groups, gs)
349
		//---> ("buildGenericTypeRep", type_def.td_ident, atype)
350
351
352
353
354
	
//========================================================================================
//	the structure type
//========================================================================================

355
convertATypeToGenTypeStruct :: !Ident !Position !PredefinedSymbols !AType (!*Modules, !*TypeDefInfos, !*Heaps, !*ErrorAdmin) 
Artem Alimarine's avatar
Artem Alimarine committed
356
	-> (GenTypeStruct, (!*Modules, !*TypeDefInfos, !*Heaps, !*ErrorAdmin))
357
convertATypeToGenTypeStruct ident pos predefs type st
358
359
	= convert type st	
where	
Artem Alimarine's avatar
Artem Alimarine committed
360
361
362
363
	convert {at_type=TA type_symb args, at_attribute} st
		= convert_type_app type_symb at_attribute args st
	convert {at_type=TAS type_symb args _, at_attribute} st
		= convert_type_app type_symb at_attribute args st
364
365
366
	convert {at_type=(CV tv) :@: args} st
		#! (args, st) = mapSt convert args st
		= (GTSAppVar tv args, st)  
Artem Alimarine's avatar
Artem Alimarine committed
367

368
369
370
	convert {at_type=x --> y} st
		#! (x, st) = convert x st
		#! (y, st) = convert y st
Artem Alimarine's avatar
Artem Alimarine committed
371
372
373
		//= (GTSAppCons (KindArrow [KindConst, KindConst]) [x,y], st)  
		= (GTSArrow x y, st)  
		
374
375
376
377
	convert {at_type=TV tv} st
		= (GTSVar tv, st)  
	convert {at_type=TB _} st
		= (GTSAppCons KindConst [], st)  
378
	convert {at_type=type} (modules, td_infos, heaps, error)
379
		# error = reportError ident pos ("can not build generic representation for this type", type) error
Artem Alimarine's avatar
Artem Alimarine committed
380
381
382
383
384
385
386
387
388
		= (GTSE, (modules, td_infos, heaps, error))

	convert_type_app {type_index} attr args (modules, td_infos, heaps, error)	
		# (type_def, modules) = modules![type_index.glob_module].com_type_defs.[type_index.glob_object]
		= case type_def.td_rhs of 
			SynType atype
				# (expanded_type, th) = expandSynonymType type_def attr args heaps.hp_type_heaps 
				-> convert {at_type = expanded_type, at_attribute = attr} 
					(modules, td_infos, {heaps & hp_type_heaps = th}, error) 
389
390
391
392
393
394
395
396
397
398
399
			_ 	
				#! {pds_module, pds_def} = predefs.[PD_UnboxedArrayType]
				| 	type_index.glob_module == pds_module
					&& type_index.glob_object == pds_def
					&& (case args of [{at_type=TB _}] -> True; _ -> False)
					-> (GTSAppCons KindConst [], (modules, td_infos, heaps, error))
				| otherwise	
					#! ({tdi_kinds}, td_infos) = td_infos ! [type_index.glob_module,type_index.glob_object]
					#! kind = if (isEmpty tdi_kinds) KindConst (KindArrow tdi_kinds)
					#! (args, st) = mapSt  convert args (modules, td_infos, heaps, error)
					-> (GTSAppCons kind args, st)  
Artem Alimarine's avatar
Artem Alimarine committed
400

Artem Alimarine's avatar
Artem Alimarine committed
401
402
403
404
// the structure type of a genric type can often be simplified
// because bimaps for types not containing generic variables are indentity bimaps
simplifyStructOfGenType :: ![TypeVar] !GenTypeStruct !*Heaps -> (!GenTypeStruct, !*Heaps)
simplifyStructOfGenType gvars type heaps=:{hp_type_heaps=hp_type_heaps=:{th_vars}} 
405
406
407
408
	#! th_vars = foldSt mark_type_var gvars th_vars
	#! (type, th_vars) = simplify type th_vars
	#! th_vars = foldSt clear_type_var gvars th_vars 
	= (type, { heaps & hp_type_heaps = { hp_type_heaps & th_vars = th_vars}})
Artem Alimarine's avatar
Artem Alimarine committed
409
410
411
412
413
414
415
416
where
	simplify t=:(GTSAppCons KindConst [])  st
		= (t, st)
	simplify (GTSAppCons kind=:(KindArrow kinds) args) st
		# formal_arity = length kinds
		# actual_arity = length args
		# (contains_gen_vars, st) = occurs_list args st
		| formal_arity == actual_arity && not contains_gen_vars
417
			= (GTSAppConsBimapKindConst, st)
Artem Alimarine's avatar
Artem Alimarine committed
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
		| otherwise
			# (args, st) = mapSt simplify args st
			=(GTSAppCons kind args, st)
	simplify (GTSArrow x y) st
		# (x, st) = simplify x st
		# (y, st) = simplify y st
		= (GTSArrow x y, st)		
	simplify (GTSAppVar tv args) st
		# (args, st) = mapSt simplify args st
		= (GTSAppVar tv args, st)	
	simplify t=:(GTSVar tv) st
		= (t, st)
	simplify t st 
		= abort "invalid generic type structure\n"
			//---> ("invalid generic type structure", t)
		
	occurs (GTSAppCons _ args) st 	= occurs_list args st
	occurs (GTSAppVar tv args) st 	= occurs_list [GTSVar tv: args] st		
	occurs (GTSVar tv) st			= type_var_occurs tv st
	occurs (GTSArrow x y) st 		= occurs_list [x,y] st
	occurs (GTSCons _ arg) st 		= occurs arg st	
	occurs (GTSField _ arg) st 		= occurs arg st	
	occurs (GTSObject _ arg) st 	= occurs arg st	
	occurs GTSE st 					= (False, st)

	occurs_list [] st = (False, st)
	occurs_list [x:xs] st 
		# (x, st) = occurs x st
		# (xs, st) = occurs_list xs st
		= (x || xs, st)   

	type_var_occurs tv th_vars
		# (tv_info, th_vars) = readPtr tv.tv_info_ptr th_vars
		= case tv_info of
			TVI_Empty = (False, th_vars) 
			TVI_Used = (True, th_vars)
			_ = abort "invalid type var info"	
				---> ("type var is not empty", tv, tv_info)		

	mark_type_var tv=:{tv_info_ptr} th_vars 
		# (tv_info, th_vars) = readPtr tv_info_ptr th_vars
		= case tv_info of
			TVI_Empty = writePtr tv_info_ptr TVI_Used th_vars 
			_ = abort "type var is not empty"
				--->  ("type var is not empty", tv, tv_info)
463

Artem Alimarine's avatar
Artem Alimarine committed
464
465
	clear_type_var {tv_info_ptr} th_vars
		= writePtr tv_info_ptr TVI_Empty th_vars 
466

Artem Alimarine's avatar
Artem Alimarine committed
467
	
468
buildStructType ::
Artem Alimarine's avatar
Artem Alimarine committed
469
470
		!GlobalIndex				// type def global index
		!DefinedSymbol 				// type_info
471
		![ConsInfo]					// constructor and field info symbols
472
		!PredefinedSymbols
Artem Alimarine's avatar
Artem Alimarine committed
473
		(!*Modules, !*TypeDefInfos, !*Heaps, !*ErrorAdmin)
474
	-> 	( !GenTypeStruct			// the structure type
Artem Alimarine's avatar
Artem Alimarine committed
475
		, (!*Modules, !*TypeDefInfos, !*Heaps, !*ErrorAdmin)
476
		)
Artem Alimarine's avatar
Artem Alimarine committed
477
buildStructType {gi_module,gi_index} type_info cons_infos predefs (modules, td_infos, heaps, error)
478
	# (type_def=:{td_ident}, modules) = modules![gi_module].com_type_defs.[gi_index]	
Artem Alimarine's avatar
Artem Alimarine committed
479
	//# (common_defs, modules) = modules ! [gi_module]	
Artem Alimarine's avatar
Artem Alimarine committed
480
	= build_type type_def type_info cons_infos (modules, td_infos, heaps, error)	
481
		//---> ("buildStructureType", td_ident, atype)	
482
where
Artem Alimarine's avatar
Artem Alimarine committed
483
	build_type {td_rhs=AlgType alts, td_ident, td_pos} type_info cons_infos st
484
		# (cons_args, st) = zipWithSt (build_alt td_ident td_pos) alts cons_infos st
Artem Alimarine's avatar
Artem Alimarine committed
485
486
487
		# type = build_sum_type cons_args
		# type = SwitchGenericInfo (GTSObject type_info type) type
		= (type, st) 
488
489

	build_type 
490
			{td_rhs=RecordType {rt_constructor}, td_ident, td_pos} 
Artem Alimarine's avatar
Artem Alimarine committed
491
			type_info  [{ci_cons_info, ci_field_infos}] 
Artem Alimarine's avatar
Artem Alimarine committed
492
493
			(modules, td_infos, heaps, error)		
		# ({cons_type={st_args}}, modules) = modules![gi_module].com_cons_defs.[rt_constructor.ds_index]	
494
		# (args, st) = mapSt (convertATypeToGenTypeStruct td_ident td_pos predefs) st_args (modules, td_infos, heaps, error)
495
496
497
498
		
		# args = SwitchGenericInfo [GTSField fi arg \\ arg <- args & fi <- ci_field_infos] args
			
		# prod_type = build_prod_type args		
Artem Alimarine's avatar
Artem Alimarine committed
499
500
		# type = SwitchGenericInfo (GTSCons ci_cons_info prod_type) prod_type
		# type = SwitchGenericInfo (GTSObject type_info type) type
501
502
		= (type, st)		

Artem Alimarine's avatar
Artem Alimarine committed
503
/*		
504
505
	build_type {td_rhs=SynType type,td_ident, td_pos} cons_infos common_defs st
		= convertATypeToGenTypeStruct td_ident td_pos type st
Artem Alimarine's avatar
Artem Alimarine committed
506
*/
Artem Alimarine's avatar
Artem Alimarine committed
507
	build_type {td_rhs=SynType type,td_ident, td_pos} type_info cons_infos (modules, td_infos, heaps, error)
508
		# error = reportError td_ident td_pos "cannot build a generic representation of a synonym type" error
Artem Alimarine's avatar
Artem Alimarine committed
509
		= (GTSE, (modules, td_infos, heaps, error))
Artem Alimarine's avatar
Artem Alimarine committed
510
	build_type td=:{td_rhs=(AbstractType _),td_ident, td_arity, td_args, td_pos} type_info cdis (modules, td_infos, heaps, error)
511
		# error = reportError td_ident td_pos "cannot build a generic representation of an abstract type" error
Artem Alimarine's avatar
Artem Alimarine committed
512
		= (GTSE, (modules, td_infos, heaps, error))
513
		
514
	build_alt td_ident td_pos cons_def_sym=:{ds_index} {ci_cons_info} (modules, td_infos, heaps, error)
515
516
517
518
519
520
521
522
		# ({cons_type={st_args},cons_exi_vars}, modules) = modules![gi_module].com_cons_defs.[ds_index]
		| isEmpty cons_exi_vars
			# (args, st) = mapSt (convertATypeToGenTypeStruct td_ident td_pos predefs) st_args (modules, td_infos, heaps, error)	
			# prod_type = build_prod_type args		
			# type = SwitchGenericInfo (GTSCons ci_cons_info prod_type) prod_type		
			= (type, st)
			# error = reportError td_ident td_pos "cannot build a generic representation of an existential type" error
			= (GTSE, (modules, td_infos, heaps, error))
523
524
525
526
527
528
529
530
531
532
533
534
535
536

	build_prod_type :: [GenTypeStruct] -> GenTypeStruct
	build_prod_type types 
		= listToBin build_pair build_unit types	
	where
		build_pair x y = GTSAppCons (KindArrow [KindConst, KindConst]) [x, y]	
		build_unit = GTSAppCons KindConst []	
		
	build_sum_type :: [GenTypeStruct] -> GenTypeStruct
	build_sum_type types
		= listToBin build_either build_void types
	where
		build_either x y = GTSAppCons (KindArrow [KindConst, KindConst]) [x, y]	
		build_void = abort "sanity check: no alternatives in a type\n"		
537
538
		
// build a product of types
John van Groningen's avatar
John van Groningen committed
539
buildProductType :: ![AType] !PredefinedSymbols -> AType
540
541
542
543
544
545
546
buildProductType types predefs 
	= listToBin build_pair build_unit types
where
	build_pair x y = buildPredefTypeApp PD_TypePAIR [x, y] predefs	
	build_unit  = buildPredefTypeApp PD_TypeUNIT [] predefs

// build a sum of types		
John van Groningen's avatar
John van Groningen committed
547
buildSumType :: ![AType] !PredefinedSymbols -> AType
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
buildSumType types predefs 
	= listToBin build_either build_void types
where
	build_either x y = buildPredefTypeApp PD_TypeEITHER [x, y] predefs	
	build_void  = abort "sum of zero types\n"

// build a binary representation of a list
listToBin :: (a a -> a) a [a] -> a 
listToBin bin tip [] = tip
listToBin bin tip [x] = x
listToBin bin tip xs
	# (l,r) = splitAt ((length xs) / 2) xs
	= bin (listToBin bin tip l) (listToBin bin tip r)

// build application of a predefined type constructor 
John van Groningen's avatar
John van Groningen committed
563
buildPredefTypeApp :: !Int [AType] !PredefinedSymbols -> AType
564
565
566
567
568
569
570
buildPredefTypeApp predef_index args predefs
	# {pds_module, pds_def} = predefs.[predef_index]
	# pds_ident = predefined_idents.[predef_index]
	# global_index = {glob_module = pds_module, glob_object = pds_def}
	# type_symb = MakeTypeSymbIdent global_index pds_ident (length args) 		  
	= makeAType (TA type_symb args) TA_Multi

571
572
573
574
575
576
577
578
579
580
581
582
583

//========================================================================================
//	build type infos
//========================================================================================
buildTypeDefInfo :: 
		!Index 				// type def module
		!CheckedTypeDef		// the type definition
		!Index				// icl module
		!PredefinedSymbols		
		!FunsAndGroups
		!*Modules
		!*Heaps
		!*ErrorAdmin
Artem Alimarine's avatar
Artem Alimarine committed
584
585
	-> 	( DefinedSymbol	// type info
		, ![ConsInfo]
586
587
588
589
590
591
592
593
594
595
596
		, !FunsAndGroups
		, !*Modules
		, !*Heaps
		, !*ErrorAdmin
		)
buildTypeDefInfo td_module td=:{td_rhs = AlgType alts} main_module_index predefs funs_and_groups modules heaps error
	= buildTypeDefInfo2 td_module td alts [] main_module_index predefs funs_and_groups modules heaps error

buildTypeDefInfo td_module td=:{td_rhs=RecordType {rt_constructor, rt_fields}} main_module_index predefs funs_and_groups modules heaps error
	= buildTypeDefInfo2 td_module td [rt_constructor] [x\\x<-:rt_fields] main_module_index predefs funs_and_groups modules heaps error

597
598
buildTypeDefInfo td_module td=:{td_rhs = SynType type, td_ident, td_pos} main_module_index predefs funs_and_groups modules heaps error
	# error = reportError td_ident td_pos "cannot build constructor uinformation for a synonym type" error
599
600
	= buildTypeDefInfo2 td_module td [] [] main_module_index predefs funs_and_groups modules heaps error

601
602
buildTypeDefInfo td_module td=:{td_rhs = AbstractType _, td_ident, td_pos} main_module_index predefs funs_and_groups modules heaps error
	# error = reportError td_ident td_pos "cannot build constructor uinformation for an abstract type" error
603
604
605
606
607
608
609
610
611
612
	= buildTypeDefInfo2 td_module td [] [] main_module_index predefs funs_and_groups modules heaps error

buildTypeDefInfo2 td_module td alts fields main_module_index predefs funs_and_groups modules heaps error
	= SwitchGenericInfo 
		(buildTypeDefInfo1 td_module td alts fields main_module_index predefs funs_and_groups modules heaps error) 
		(dummy, funs_and_groups, modules, heaps, error) 
where
	dummy_ds = {ds_index = -1, ds_arity = 0, ds_ident = makeIdent "<dummy_generic_info>"} 
	dummy = (dummy_ds, repeatn (length alts) dummy_ds)

613
buildTypeDefInfo1 td_module {td_ident, td_pos, td_arity} alts fields main_module_index predefs (fun_index, group_index, funs, groups) modules heaps error
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628

	# num_conses = length alts
	# num_fields = length fields
	# new_group_index = inc group_index

	# type_def_dsc_index = fun_index
	# first_cons_dsc_index = fun_index + 1
	# cons_dsc_indexes = [first_cons_dsc_index .. first_cons_dsc_index + num_conses - 1]
	# first_field_dsc_index = first_cons_dsc_index + num_conses
	# field_dsc_indexes = [first_field_dsc_index .. first_field_dsc_index + num_fields - 1]
	# new_fun_index = first_field_dsc_index + num_fields

	# group = {group_members = [fun_index .. new_fun_index - 1]}
	# new_groups = [group:groups]
	
629
	# type_def_dsc_ds = {ds_arity=0, ds_ident=makeIdent("tdi_"+++td_ident.id_name), ds_index=type_def_dsc_index}
630
631
	# cons_dsc_dss = [ {ds_arity=0, ds_ident=makeIdent("cdi_"+++ds_ident.id_name), ds_index=i} \\ 
		{ds_ident} <- alts & i <- cons_dsc_indexes]
632
633
	# field_dsc_dss = [ {ds_arity=0, ds_ident=makeIdent("fdi_"+++fs_ident.id_name), ds_index=i} \\ 
		{fs_ident} <- fields & i <- field_dsc_indexes]
634
635
636
637
638
639
640
	
	# (type_def_dsc_fun, heaps) = build_type_def_dsc group_index cons_dsc_dss type_def_dsc_ds heaps	
	
	# (cons_dsc_funs, (modules, heaps)) = zipWithSt (build_cons_dsc group_index type_def_dsc_ds field_dsc_dss) cons_dsc_dss alts (modules, heaps) 
	
	# (field_dsc_funs, (modules, heaps)) = zipWithSt (build_field_dsc group_index (hd cons_dsc_dss)) field_dsc_dss fields (modules, heaps)
	 
Artem Alimarine's avatar
Artem Alimarine committed
641
642
	// NOTE: reverse order (new functions are added at the head) 
	# new_funs = (reverse field_dsc_funs) ++ (reverse cons_dsc_funs) ++ [type_def_dsc_fun] ++ funs 
643
644
	
	# funs_and_groups = (new_fun_index, new_group_index, new_funs, new_groups)
Artem Alimarine's avatar
Artem Alimarine committed
645
646
647

	# (type_info_ds, (funs_and_groups, heaps)) 
		= build_type_info type_def_dsc_ds (funs_and_groups, heaps)
648
649
650
651
652
653
654
655
	
	# (cons_info_dss, (funs_and_groups, heaps)) 
		= mapSt build_cons_info cons_dsc_dss (funs_and_groups, heaps)

	# (field_info_dss, (funs_and_groups, heaps)) 
		= mapSt build_field_info field_dsc_dss (funs_and_groups, heaps)

	# cons_infos = case (cons_info_dss, field_info_dss) of
Artem Alimarine's avatar
Artem Alimarine committed
656
		([cons_info_ds], field_infos) -> [{ci_cons_info = cons_info_ds, ci_field_infos = field_infos}] 	 
657
658
659
		(cons_info_dss, []) -> [{ci_cons_info=x,ci_field_infos=[]}\\x<-cons_info_dss]
		_ -> abort "generics.icl sanity check: fields in non-record type\n"

Artem Alimarine's avatar
Artem Alimarine committed
660
661

	= (type_info_ds, cons_infos, funs_and_groups, modules, heaps, error)
662
663
664
where

	build_type_def_dsc group_index cons_info_dss {ds_index, ds_ident}  heaps	
665
		# td_name_expr = makeStringExpr td_ident.id_name
666
		# td_arity_expr = makeIntExpr td_arity
Artem Alimarine's avatar
Artem Alimarine committed
667
		# num_conses_expr = makeIntExpr (length alts)
668
669
670
671
		# (cons_info_exprs, heaps) = mapSt (\x st->buildFunApp main_module_index x [] st) cons_info_dss heaps
		# (td_conses_expr, heaps) = makeListExpr cons_info_exprs predefs heaps
		
		# (body_expr, heaps) = buildPredefConsApp PD_CGenericTypeDefDescriptor 
Artem Alimarine's avatar
Artem Alimarine committed
672
673
674
675
			[ td_name_expr
			, td_arity_expr
			, num_conses_expr 
			, td_conses_expr
676
			// TODO: module_name_expr
Artem Alimarine's avatar
Artem Alimarine committed
677
			] 
678
679
680
681
682
683
			predefs heaps	
						
		# fun = makeFunction ds_ident ds_index group_index [] body_expr No main_module_index td_pos		
		= (fun, heaps)

	build_cons_dsc group_index type_def_info_ds field_dsc_dss cons_info_ds cons_ds (modules, heaps)
684
		# ({cons_ident, cons_type, cons_priority,cons_number}, modules)	
Artem Alimarine's avatar
Artem Alimarine committed
685
			= modules! [td_module].com_cons_defs.[cons_ds.ds_index]  		
686
		# name_expr 			 = makeStringExpr cons_ident.id_name
687
688
689
690
691
692
		# arity_expr 			 = makeIntExpr cons_type.st_arity
		# (prio_expr, heaps)	 = make_prio_expr cons_priority heaps
		# (type_def_expr, heaps) = buildFunApp main_module_index type_def_info_ds [] heaps
		# (type_expr, heaps) 	 = make_type_expr cons_type heaps 			
		# (field_exprs, heaps)   = mapSt (\x st->buildFunApp main_module_index x [] st) field_dsc_dss heaps
		# (fields_expr, heaps)   =  makeListExpr field_exprs predefs heaps 
693
		# cons_index_expr		 = makeIntExpr cons_number
694
695
696
697
698
699
700
701
		# (body_expr, heaps) 
			= buildPredefConsApp PD_CGenericConsDescriptor 
				[ name_expr 
				, arity_expr
				, prio_expr
				, type_def_expr
				, type_expr
				, fields_expr 
Artem Alimarine's avatar
Artem Alimarine committed
702
				, cons_index_expr
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
				]  
				predefs heaps

		# fun = makeFunction cons_info_ds.ds_ident cons_info_ds.ds_index group_index [] body_expr No main_module_index td_pos		
		= (fun, (modules, heaps))
	where
		make_prio_expr NoPrio heaps
			= buildPredefConsApp PD_CGenConsNoPrio [] predefs heaps
		make_prio_expr (Prio assoc prio) heaps
			# assoc_predef = case assoc of
				NoAssoc 	-> PD_CGenConsAssocNone 
				LeftAssoc 	-> PD_CGenConsAssocLeft
				RightAssoc 	-> PD_CGenConsAssocRight
			# (assoc_expr, heaps) = buildPredefConsApp assoc_predef [] predefs heaps 	
			# prio_expr = makeIntExpr prio		
			= buildPredefConsApp PD_CGenConsPrio [assoc_expr, prio_expr] predefs heaps 

720
721
722
723
		make_type_expr {st_vars, st_args, st_result} heaps=:{hp_type_heaps=type_heaps=:{th_vars}}
			# (_,th_vars) = foldSt (\ {tv_info_ptr} (n, th_vars) -> (n+1, writePtr tv_info_ptr (TVI_GenTypeVarNumber n) th_vars)) st_vars (0,th_vars)
			# heaps = {heaps & hp_type_heaps={type_heaps & th_vars=th_vars}}
			# (arg_exprs, heaps) = mapSt make_expr1 st_args heaps
724
			# (result_expr, heaps) = make_expr1 st_result heaps
725
726
727
728
			# {hp_type_heaps=type_heaps=:{th_vars}} = heaps
			# th_vars = foldSt (\ {tv_info_ptr} th_vars -> writePtr tv_info_ptr TVI_Empty th_vars) st_vars th_vars
			# heaps = {heaps & hp_type_heaps={type_heaps & th_vars=th_vars}}
			= curry arg_exprs result_expr heaps
729
730
731
732
733
734
735
736
737
738
739
740
741
742
		where
		
			curry [] result_expr heaps 
				= (result_expr, heaps)
			curry [x:xs] result_expr heaps
				# (y, heaps) = curry xs result_expr heaps
				= make_arrow x y heaps
		
			make_expr1 :: !AType !*Heaps -> (!Expression, !*Heaps)
			make_expr1 {at_type} heaps = make_expr at_type heaps
		
			make_expr :: !Type !*Heaps -> (!Expression, !*Heaps)
			make_expr (TA type_symb arg_types) heaps
				# (arg_exprs, heaps) = mapSt make_expr1 arg_types heaps
743
				# (type_cons, heaps) = make_type_cons type_symb.type_ident.id_name heaps 
744
745
746
				= make_apps type_cons arg_exprs heaps
			make_expr (TAS type_symb arg_types _) heaps
				# (arg_exprs, heaps) = mapSt make_expr1 arg_types heaps
747
				# (type_cons, heaps) = make_type_cons type_symb.type_ident.id_name heaps 
748
749
750
751
752
753
754
755
756
757
758
				= make_apps type_cons arg_exprs heaps
			make_expr (x --> y) heaps
				# (x, heaps) = make_expr1 x heaps
				# (y, heaps) = make_expr1 y heaps				
				= make_arrow x y heaps
			make_expr TArrow heaps 
				= make_type_cons "(->)" heaps
			make_expr (TArrow1 type) heaps
				# (arg_expr, heaps) = make_expr1 type heaps 
				# (arrow_expr, heaps) = make_type_cons "(->)" heaps
				= make_app arrow_expr arg_expr heaps
759
			make_expr (CV {tv_info_ptr} :@: arg_types) heaps
760
				# (arg_exprs, heaps) = mapSt make_expr1 arg_types heaps
761
				# (tv_expr, heaps) = make_type_var tv_info_ptr heaps
762
763
764
				= make_apps tv_expr arg_exprs heaps
			make_expr (TB bt) heaps
				= make_type_cons (toString bt) heaps	
765
766
767
768
769
770
			make_expr (TV {tv_info_ptr}) heaps 
				= make_type_var tv_info_ptr heaps 
			make_expr (GTV {tv_info_ptr}) heaps
				= make_type_var tv_info_ptr heaps 
			make_expr (TQV {tv_info_ptr}) heaps 
				= make_type_var tv_info_ptr heaps
771
772
773
774
775
776
777
778
779
780
781
782
783
784
			make_expr TE heaps
				= make_type_cons "<error>" heaps	 
			make_expr _ heaps 
				= abort "type does not match\n"
		
			make_apps x [] heaps 
				= (x, heaps)
			make_apps x [y:ys] heaps
				# (z, heaps) = make_app x y heaps	
				= make_apps z ys heaps 
		
			make_type_cons name heaps
				# name_expr = makeStringExpr name
				= buildPredefConsApp PD_CGenTypeCons [name_expr] predefs heaps
785
786
787
788
789
790

			make_type_var tv_info_ptr heaps
				#! type_var_n = case sreadPtr tv_info_ptr heaps.hp_type_heaps.th_vars of
									TVI_GenTypeVarNumber n -> n
				= buildPredefConsApp PD_CGenTypeVar [makeIntExpr type_var_n] predefs heaps									

791
			make_arrow x y heaps = buildPredefConsApp PD_CGenTypeArrow [x, y] predefs heaps
792

793
794
			make_app x y heaps = buildPredefConsApp PD_CGenTypeApp [x, y] predefs heaps 	 

795
796
	build_field_dsc group_index cons_dsc_ds field_dsc_ds {fs_ident, fs_index} (modules, heaps)
		# name_expr = makeStringExpr fs_ident.id_name
797
798
799
		# ({sd_field_nr}, modules)	
			= modules! [td_module].com_selector_defs.[fs_index]  		
		# index_expr = makeIntExpr sd_field_nr
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
		# (cons_expr, heaps) = buildFunApp main_module_index cons_dsc_ds [] heaps				
		# (body_expr, heaps) 
			= buildPredefConsApp PD_CGenericFieldDescriptor 
				[ name_expr 
				, index_expr
				, cons_expr
				]  
				predefs heaps
		# fun = makeFunction field_dsc_ds.ds_ident field_dsc_ds.ds_index group_index [] body_expr No main_module_index td_pos		
		= (fun, (modules, heaps))
		
	build_cons_info cons_dsc_ds (funs_and_groups, heaps)
		# ident = makeIdent ("g"+++cons_dsc_ds.ds_ident.id_name)	

		# (cons_dsc_expr, heaps) = buildFunApp main_module_index cons_dsc_ds [] heaps

		# (body_expr, heaps) 
			= buildPredefConsApp PD_GenericConsInfo [cons_dsc_expr] predefs heaps		

		# (def_sym, funs_and_groups) = buildFunAndGroup ident [] body_expr No main_module_index td_pos funs_and_groups
		= (def_sym, (funs_and_groups, heaps))

	build_field_info field_dsc_ds (funs_and_groups, heaps)
		# ident = makeIdent ("g"+++field_dsc_ds.ds_ident.id_name)	

		# (field_dsc_expr, heaps) = buildFunApp main_module_index field_dsc_ds [] heaps

		# (body_expr, heaps) 
			= buildPredefConsApp PD_GenericFieldInfo [field_dsc_expr] predefs heaps		

		# (def_sym, funs_and_groups) = buildFunAndGroup ident [] body_expr No main_module_index td_pos funs_and_groups
		= (def_sym, (funs_and_groups, heaps))

Artem Alimarine's avatar
Artem Alimarine committed
833
834
835
836
837
838
839
840
841
842
843
844
845
	build_type_info type_dsc_ds (funs_and_groups, heaps)
		# ident = makeIdent ("g"+++type_dsc_ds.ds_ident.id_name)	

		# (type_dsc_expr, heaps) = buildFunApp main_module_index type_dsc_ds [] heaps

		# (body_expr, heaps) 
			= buildPredefConsApp PD_GenericTypeInfo [type_dsc_expr] predefs heaps		

		# (def_sym, funs_and_groups) = buildFunAndGroup ident [] body_expr No main_module_index td_pos funs_and_groups
		= (def_sym, (funs_and_groups, heaps))



846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
//========================================================================================
//	conversions functions
//========================================================================================

// buildConversionIso
buildConversionIso :: 
		!CheckedTypeDef		// the type definition
		!DefinedSymbol		// from fun
		!DefinedSymbol	 	// to fun
		!Index				// main module
		!PredefinedSymbols		
		(!Index, !Index, ![FunDef], ![Group])
		!*Heaps
		!*ErrorAdmin
	-> 	( !DefinedSymbol
		, (!Index, !Index, ![FunDef], ![Group])
		, !*Heaps
		, !*ErrorAdmin
		)
buildConversionIso 
866
		type_def=:{td_ident, td_pos}
867
868
869
870
871
872
873
874
875
876
877
		from_fun 
		to_fun
		main_dcl_module_n
		predefs
		funs_and_groups
		heaps 
		error
	#! (from_expr, heaps) 	= buildFunApp main_dcl_module_n from_fun [] heaps
	#! (to_expr, heaps) 	= buildFunApp main_dcl_module_n to_fun [] heaps	
	#! (iso_expr, heaps) 	= build_iso to_expr from_expr heaps
	
878
	#! ident = makeIdent ("iso" +++ td_ident.id_name)
879
880
	#! (def_sym, funs_and_groups) = buildFunAndGroup ident [] iso_expr No main_dcl_module_n td_pos funs_and_groups
	= (def_sym, funs_and_groups, heaps, error)
881
		//---> ("buildConversionIso", td_ident, let (_,_,fs,_) = funs_and_groups in hd fs)
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
where
	build_iso to_expr from_expr heaps 
		= buildPredefConsApp PD_ConsBimap [to_expr, from_expr] predefs heaps	
		
// conversion from type to generic
buildConversionTo ::
		!Index				// type def module
		!CheckedTypeDef 	// the type def
		!Index 				// main module
		!PredefinedSymbols
		!(!Index, !Index, ![FunDef], ![Group])
		!*Heaps	
		!*ErrorAdmin
	-> 	( !DefinedSymbol
		, (!Index, !Index, ![FunDef], ![Group])
		, !*Heaps
		, !*ErrorAdmin	
		)
buildConversionTo		
		type_def_mod 
902
		type_def=:{td_rhs, td_ident, td_index, td_pos} 
903
904
905
906
907
908
909
910
		main_module_index
		predefs
		funs_and_groups
		heaps
		error
	# (arg_expr, arg_var, heaps) = buildVarExpr "x" heaps 
	# (body_expr, heaps, error) = 
		build_expr_for_type_rhs type_def_mod td_index td_rhs arg_expr heaps error
911
	# fun_name = makeIdent ("fromGenericTo" +++ td_ident.id_name)
912
913
914
915
	| not error.ea_ok
		# (def_sym, funs_and_groups) 
			= (buildFunAndGroup fun_name [] EE No main_module_index td_pos funs_and_groups)
		= (def_sym, funs_and_groups, heaps, error)	
916
			//---> ("buildConversionTo failed", td_ident)
917
918
919
		# (def_sym, funs_and_groups) 
			= (buildFunAndGroup fun_name [arg_var] body_expr No main_module_index td_pos funs_and_groups)
		= (def_sym, funs_and_groups, heaps, error)
920
			//---> ("buildConversionTo", td_ident, let (_,_,fs,_) = funs_and_groups in hd fs)
921
922
923
924
925
926
927
928
929
930
931
932
933
934
where
	// build conversion for type rhs
	build_expr_for_type_rhs :: 
			!Int 				// type def module
			!Int 				// type def index 
			!TypeRhs			// type def rhs 
			!Expression			// expression of the function argument variable   
			!*Heaps 
			!*ErrorAdmin
		-> 	( !Expression		// generated expression
			, !*Heaps	// state
			, !*ErrorAdmin
			)
 	build_expr_for_type_rhs type_def_mod type_def_index (AlgType def_symbols) arg_expr heaps error
935
		= build_expr_for_conses False type_def_mod type_def_index def_symbols arg_expr heaps error
936
	build_expr_for_type_rhs type_def_mod type_def_index (RecordType {rt_constructor}) arg_expr heaps error		
937
		= build_expr_for_conses True type_def_mod type_def_index [rt_constructor] arg_expr  heaps error
938
	build_expr_for_type_rhs type_def_mod type_def_index (AbstractType _) arg_expr  heaps error
939
		#! error = checkErrorWithIdentPos (newPosition td_ident td_pos) "cannot build isomorphisms for an abstract type" error
940
941
		= (EE, heaps, error)
	build_expr_for_type_rhs type_def_mod type_def_index (SynType _) arg_expr  heaps error
942
		#! error = checkErrorWithIdentPos (newPosition td_ident td_pos) "cannot build isomorphisms for a synonym type" error
943
944
945
		= (EE, heaps, error)
	
	// build conversion for constructors of a type def 	
946
	build_expr_for_conses is_record type_def_mod type_def_index cons_def_syms arg_expr heaps error
947
		# (case_alts, heaps, error) = 
948
			build_exprs_for_conses is_record 0 (length cons_def_syms) type_def_mod cons_def_syms  heaps error
949
950
951
952
953
		# case_patterns = AlgebraicPatterns {glob_module = type_def_mod, glob_object = type_def_index} case_alts
		# (case_expr, heaps) = buildCaseExpr arg_expr case_patterns heaps
		= (case_expr, heaps, error)	
			//---> (free_vars, case_expr)		
	
954
955
	// build conversions for constructors 	
	build_exprs_for_conses :: !Bool !Int !Int !Int ![DefinedSymbol] !*Heaps !*ErrorAdmin
956
		-> ([AlgebraicPattern], !*Heaps, !*ErrorAdmin)
957
958
959
960
	build_exprs_for_conses is_record i n type_def_mod [] heaps error = ([], heaps, error) 	
	build_exprs_for_conses is_record i n type_def_mod [cons_def_sym:cons_def_syms] heaps error
		#! (alt, heaps, error) = build_expr_for_cons is_record i n type_def_mod cons_def_sym heaps error
		#! (alts, heaps, error) =  build_exprs_for_conses is_record (i+1) n type_def_mod cons_def_syms heaps error 		
961
962
963
		= ([alt:alts], heaps, error)
					
	// build conversion for a constructor	
964
	build_expr_for_cons :: !Bool !Int !Int !Int !DefinedSymbol !*Heaps !*ErrorAdmin 
965
		-> (AlgebraicPattern, !*Heaps, !*ErrorAdmin)
966
	build_expr_for_cons is_record i n type_def_mod cons_def_sym=:{ds_ident, ds_arity} heaps error	
967
968
		#! names = ["x" +++ toString (i+1) +++ toString k \\ k <- [1..ds_arity]]
		#! (var_exprs, vars, heaps) = buildVarExprs names heaps 
969
970
971
972
973
974
975
976
977
978
979

		#! (arg_exprs, heaps) = build_fields (SwitchGenericInfo True False && is_record) var_exprs heaps
			with
				build_fields False var_exprs heaps = (var_exprs, heaps)
				build_fields True var_exprs heaps = mapSt build_field var_exprs heaps
				build_field var_expr heaps = buildPredefConsApp PD_ConsFIELD [var_expr] predefs heaps 

		#! (expr, heaps) = build_prod arg_exprs predefs heaps
		#! (expr, heaps) = SwitchGenericInfo (build_cons expr heaps) (expr, heaps)
			with 
				build_cons expr heaps = buildPredefConsApp PD_ConsCONS [expr] predefs heaps						
980
981
		#! (expr, heaps) = build_sum i n expr predefs heaps
				
Artem Alimarine's avatar
Artem Alimarine committed
982
983
984
985
		#! (expr, heaps) = SwitchGenericInfo (build_object expr heaps) (expr, heaps)
			with 
				build_object expr heaps = buildPredefConsApp PD_ConsOBJECT [expr] predefs heaps						
						
986
		#! alg_pattern = {
987
			ap_symbol = {glob_module = type_def_mod, glob_object = cons_def_sym},
988
989
990
991
992
993
			ap_vars = vars,
			ap_expr = expr,
			ap_position = NoPos
			}
		= (alg_pattern, heaps, error)	
	
994
	
995
996
997
998
999
1000
	build_sum :: !Int !Int !Expression !PredefinedSymbols !*Heaps -> (!Expression, !*Heaps)
	build_sum i n expr predefs heaps
		| n == 0 	= abort "build sum of zero elements\n"
		| i >= n	= abort "error building sum"
		| n == 1 	= (expr, heaps)
		| i < (n/2) 
For faster browsing, not all history is shown. View entire blame