1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2008 Jean Privat <jean@pryen.org>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # Compute and generate tables for classes and modules.
18 package compiling_global
20 #import compiling_base
21 private import compiling_methods
24 # Something that store color of table elements
26 attr _colors
: HashMap[TableElt, Int] = null
28 # The color of a table element.
29 meth color
(e
: TableElt): Int
34 # Is a table element already colored?
35 meth has_color
(e
: TableElt): Bool
37 return _colors
!= null and _colors
.has_key
(e
)
40 # Assign a color to a table element.
41 meth color
=(e
: TableElt, c
: Int)
43 if _colors
== null then _colors
= new HashMap[TableElt, Int]
46 for i
in [0..e
.length
[ do
47 _colors
[e
.item
(i
)] = idx
53 # All information and results of the global analysis.
56 # Associate global classes to compiled classes
57 readable attr _compiled_classes
: HashMap[MMGlobalClass, CompiledClass]
59 # The main module of the program globally analysed
60 readable attr _module
: MMModule
62 # FIXME: do something better.
63 readable writable attr _max_class_table_length
: Int
65 init(module: MMSrcModule)
67 _compiled_classes
= new HashMap[MMGlobalClass, CompiledClass]
72 redef class CompilerVisitor
73 # The global analysis result, if any
74 readable writable attr _global_analysis
: GlobalAnalysis
77 # A compiled class is a class in a program
80 # The corresponding local class in the main module of the prgram
81 readable attr _local_class
: MMLocalClass
83 # The identifier of the class
84 readable writable attr _id
: Int
86 # The full class table of the class
87 readable writable attr _class_table
: Array[TableElt]
89 # The full instance table of the class
90 readable writable attr _instance_table
: Array[TableElt]
92 # The proper class table part (no superclasses but all refinements)
93 readable writable attr _class_layout
: TableEltComposite
95 # The proper instance table part (no superclasses but all refinements)
96 readable writable attr _instance_layout
: TableEltComposite
98 init(c
: MMLocalClass) do _local_class
= c
101 redef class MMSrcLocalClass
102 # The table element of the subtype check
103 readable attr _class_color_pos
: TableEltClassColor
105 # The proper local class table part (nor superclasses nor refinments)
106 readable attr _class_layout
: Array[TableElt]
108 # The proper local instance table part (nor superclasses nor refinments)
109 readable attr _instance_layout
: Array[TableElt]
111 # Build the local layout of the class and feed the module table
112 meth build_layout_in
(tc
: ToolContext, module_table
: Array[ModuleTableElt])
114 var clt
= new Array[TableElt]
116 var ilt
= new Array[TableElt]
117 _instance_layout
= ilt
119 if global
.intro
== self then
120 module_table
.add
(new TableEltClassId(self))
121 _class_color_pos
= new TableEltClassColor(self)
122 module_table
.add
(_class_color_pos
)
123 clt
.add
(new TableEltClassInitTable(self))
125 for p
in src_local_properties
do
127 if pg
.intro
== p
then
128 if p
isa MMSrcAttribute then
129 ilt
.add
(new TableEltAttr(p
))
130 else if p
isa MMSrcMethod then
131 clt
.add
(new TableEltMeth(p
))
134 if p
isa MMSrcMethod and p
.need_super
then
135 clt
.add
(new TableEltSuper(p
))
139 if not ilt
.is_empty
then
140 var teg
= new ModuleTableEltGroup
141 teg
.elements
.append
(ilt
)
142 module_table
.add
(teg
)
145 if not clt
.is_empty
then
146 var teg
= new ModuleTableEltGroup
147 teg
.elements
.append
(clt
)
148 module_table
.add
(teg
)
153 redef class MMSrcModule
154 # The local table of the module (refers things introduced in the module)
155 attr _local_table
: Array[ModuleTableElt]
157 # Builds the local tables and local classes layouts
158 meth local_analysis
(tc
: ToolContext)
160 var lt
= new Array[ModuleTableElt]
162 for c
in src_local_classes
do
163 c
.build_layout_in
(tc
, lt
)
167 # Do the complete global analysis
168 meth global_analysis
(cctx
: ToolContext): GlobalAnalysis
170 #print "Do the complete global analysis"
171 var ga
= new GlobalAnalysis(self)
172 var smallest_classes
= new Array[MMLocalClass]
173 var global_properties
= new HashSet[MMGlobalProperty]
174 var ctab
= new Array[TableElt]
175 var itab
= new Array[TableElt]
177 ctab
.add
(new TableEltClassSelfId)
178 itab
.add
(new TableEltVftPointer)
183 # We have to work on ALL the classes of the module
184 var classes
= new Array[MMLocalClass]
185 for c
in local_classes
do
186 c
.compute_super_classes
189 (new ClassSorter).sort
(classes
)
192 # Finish processing the class (if invisible)
194 c
.inherit_global_properties
196 # Associate a CompiledClass to the class
197 var cc
= new CompiledClass(c
)
198 ga
.compiled_classes
[c
.global
] = cc
200 # Assign a unique class identifier
201 # (negative are for primitive classes)
204 if c
.primitive_info
!= null then
206 pclassid
= pclassid
- 4
209 classid
= classid
+ 4
212 # Register is the class is a leaf
213 if c
.cshe
.direct_smallers
.is_empty
then
214 smallest_classes
.add
(c
)
217 # Store the colortableelt in the class table pool
218 var bc
= c
.global
.intro
219 assert bc
isa MMSrcLocalClass
220 ctab
.add
(bc
.class_color_pos
)
223 # Compute core and crown classes for colorization
224 var crown_classes
= new HashSet[MMLocalClass]
225 var core_classes
= new HashSet[MMLocalClass]
226 for c
in smallest_classes
do
227 while c
.cshe
.direct_greaters
.length
== 1 do
228 c
= c
.cshe
.direct_greaters
.first
231 core_classes
.add_all
(c
.cshe
.greaters_and_self
)
233 #print("nbclasses: {classes.length} leaves: {smallest_classes.length} crown: {crown_classes.length} core: {core_classes.length}")
235 # Colorize core color for typechecks
236 colorize
(ga
, ctab
, crown_classes
, 0)
238 # Compute tables for typechecks
241 var cc
= ga
.compiled_classes
[c
.global
]
242 if core_classes
.has
(c
) then
243 # For core classes, just build the table
244 cc
.class_table
= build_tables
(ga
, c
, ctab
)
245 if maxcolor
< cc
.class_table
.length
then maxcolor
= cc
.class_table
.length
247 # For other classes, it's easier: just append to the parent tables
248 var sc
= c
.cshe
.direct_greaters
.first
249 var scc
= ga
.compiled_classes
[sc
.global
]
250 cc
.class_table
= scc
.class_table
.to_a
251 var bc
= c
.global
.intro
252 assert bc
isa MMSrcLocalClass
253 var colpos
= bc
.class_color_pos
254 var colposcolor
= cc
.class_table
.length
255 ga
.color
(colpos
) = colposcolor
256 cc
.class_table
.add
(colpos
)
257 if maxcolor
< colposcolor
then maxcolor
= colposcolor
260 ga
.max_class_table_length
= maxcolor
+ 1
262 # Fill class table and instance tables pools
264 var cc
= ga
.compiled_classes
[c
.global
]
265 var cte
= new TableEltComposite(cc
)
266 var ite
= new TableEltComposite(cc
)
267 for sc
in c
.crhe
.greaters_and_self
do
268 if sc
isa MMSrcLocalClass then
269 cte
.add
(sc
, sc
.class_layout
)
270 ite
.add
(sc
, sc
.instance_layout
)
272 cc
.class_layout
= cte
273 cc
.instance_layout
= ite
276 if core_classes
.has
(c
) then
277 if cte
.length
> 0 then
280 if ite
.length
> 0 then
286 # Colorize all elements in pools tables
287 colorize
(ga
, ctab
, crown_classes
, maxcolor
+1)
288 colorize
(ga
, itab
, crown_classes
, 0)
290 # Build class and instance tables now things are colored
291 ga
.max_class_table_length
= 0
293 var cc
= ga
.compiled_classes
[c
.global
]
294 if core_classes
.has
(c
) then
295 # For core classes, just build the table
296 cc
.class_table
= build_tables
(ga
, c
, ctab
)
297 cc
.instance_table
= build_tables
(ga
, c
, itab
)
299 # For other classes, it's easier: just append to the parent tables
300 var sc
= c
.cshe
.direct_greaters
.first
301 var scc
= ga
.compiled_classes
[sc
.global
]
302 cc
.class_table
= scc
.class_table
.to_a
303 var bc
= c
.global
.intro
304 assert bc
isa MMSrcLocalClass
305 var colpos
= bc
.class_color_pos
306 cc
.class_table
[ga
.color
(colpos
)] = colpos
307 while cc
.class_table
.length
<= maxcolor
do
308 cc
.class_table
.add
(null)
310 append_to_table
(ga
, cc
.class_table
, cc
.class_layout
)
311 cc
.instance_table
= scc
.instance_table
.to_a
312 append_to_table
(ga
, cc
.instance_table
, cc
.instance_layout
)
319 private meth append_to_table
(cc
: ColorContext, table
: Array[TableElt], cmp
: TableEltComposite)
321 for j
in [0..cmp
.length
[ do
323 cc
.color
(e
) = table
.length
328 private meth build_tables
(ga
: GlobalAnalysis, c
: MMLocalClass, elts
: Array[TableElt]): Array[TableElt]
330 var tab
= new HashMap[Int, TableElt]
333 if e
.is_related_to
(c
) then
334 var col
= ga
.color
(e
)
335 var l
= col
+ e
.length
342 var res
= new Array[TableElt]
345 if tab
.has_key
(i
) then
347 for j
in [0..e
.length
[ do
360 meth colorize
(ga
: GlobalAnalysis, elts
: Array[TableElt], classes
: Collection[MMLocalClass], startcolor
: Int)
362 var colors
= new HashMap[Int, Array[TableElt]]
363 var rel_classes
= new Array[MMLocalClass]
367 if ga
.has_color
(e
) then
372 if e
.is_related_to
(c
) then
376 var trycolor
= startcolor
377 while trycolor
!= color
do
379 for c
in rel_classes
do
382 if colors
.has_key
(trycolor
+ idx
) and not free_color
(colors
[trycolor
+ idx
], c
) then
383 trycolor
= trycolor
+ idx
+ 1
393 for idx
in [0..len
[ do
394 if colors
.has_key
(color
+ idx
) then
395 colors
[color
+ idx
].add
(e
)
397 colors
[color
+ idx
] = [e
]
403 private meth free_color
(es
: Array[TableElt], c
: MMLocalClass): Bool
406 if e2
.is_related_to
(c
) then
413 # Compile module and class tables
414 meth compile_tables_to_c
(v
: CompilerVisitor)
416 for m
in mhe
.greaters_and_self
do
417 assert m
isa MMSrcModule
418 m
.compile_local_table_to_c
(v
)
421 for c
in local_classes
do
422 c
.compile_tables_to_c
(v
)
424 var s
= "classtable_t TAG2VFT[4] = \{NULL"
425 for t
in ["Int","Char","Bool"] do
426 if has_global_class_named
(t
.to_symbol
) then
427 s
.append
(", (const classtable_t)VFT_{t}")
436 # Declare class table (for _sep.h)
437 meth declare_class_tables_to_c
(v
: CompilerVisitor)
439 for c
in local_classes
do
440 if c
.global
.module == self then
441 c
.declare_tables_to_c
(v
)
446 # Compile main part (for _table.c)
447 meth compile_main_part
(v
: CompilerVisitor)
449 v
.add_instr
("int main(int argc, char **argv) \{")
451 v
.add_instr
("prepare_signals();")
452 v
.add_instr
("glob_argc = argc; glob_argv = argv;")
453 var sysname
= once
"Sys".to_symbol
454 if not has_global_class_named
(sysname
) then
457 var sys
= class_by_name
(sysname
)
458 # var initm = sys.select_method(once "init".to_symbol)
459 var mainm
= sys
.select_method
(once
"main".to_symbol
)
460 if mainm
== null then
463 #v.add_instr("G_sys = NEW_{initm.cname}();")
464 v
.add_instr
("G_sys = NEW_Sys();")
465 v
.add_instr
("{mainm.cname}(G_sys);")
468 v
.add_instr
("return 0;")
474 meth compile_mod_to_c
(v
: CompilerVisitor)
476 v
.add_decl
("extern const char *LOCATE_{name};")
477 if not v
.tc
.global
then
478 v
.add_decl
("extern const int SFT_{name}[];")
481 for e
in _local_table
do
484 value
= "{e.value(v.global_analysis)}"
486 value
= "SFT_{name}[{i}]"
489 e
.compile_macros
(v
, value
)
491 for c
in src_local_classes
do
492 for pg
in c
.global_properties
do
494 if p
.local_class
== c
then
495 p
.compile_property_to_c
(v
)
497 if pg
.is_init_for
(c
) then
498 # Declare constructors
499 var params
= new Array[String]
500 for i
in [0..p
.signature
.arity
[ do
501 params
.add
("val_t p{i}")
503 v
.add_decl
("val_t NEW_{c}_{p.global.intro.cname}({params.join(", ")});")
509 # Compile module file for the current module
510 meth compile_local_table_to_c
(v
: CompilerVisitor)
512 v
.add_instr
("const char *LOCATE_{name} = \"{filename}\
";")
514 if v
.tc
.global
or _local_table
.is_empty
then
518 v
.add_instr
("const int SFT_{name}[{_local_table.length}] = \{")
520 for e
in _local_table
do
521 v
.add_instr
(e
.value
(v
.global_analysis
) + ",")
528 ###############################################################################
530 # An element of a class, an instance or a module table
531 abstract class AbsTableElt
532 # Compile the macro needed to use the element and other related elements
533 meth compile_macros
(v
: CompilerVisitor, value
: String) is abstract
536 # An element of a class or an instance table
537 # Such an elements represent method function pointers, attribute values, etc.
538 abstract class TableElt
540 # Is the element conflict to class `c' (used for coloring)
541 meth is_related_to
(c
: MMLocalClass): Bool is abstract
543 # Number of sub-elements. 1 if none
544 meth length
: Int do return 1
546 # Access the ith subelement.
547 meth item
(i
: Int): TableElt do return self
549 # Return the value of the element for a given class
550 meth compile_to_c
(v
: CompilerVisitor, c
: MMLocalClass): String is abstract
553 # An element of a module table
554 # Such an elements represent colors or identifiers
555 abstract class ModuleTableElt
557 # Return the value of the element once the global analisys is performed
558 meth value
(ga
: GlobalAnalysis): String is abstract
561 # An element of a module table that represents a group of TableElt defined in the same local class
562 class ModuleTableEltGroup
563 special ModuleTableElt
564 readable attr _elements
: Array[TableElt] = new Array[TableElt]
566 redef meth value
(ga
) do return "{ga.color(_elements.first)} /* Group of ? */"
567 redef meth compile_macros
(v
, value
)
570 for e
in _elements
do
571 e
.compile_macros
(v
, "{value} + {i}")
577 # An element that represents a class property
578 abstract class TableEltProp
580 attr _property
: MMLocalProperty
582 init(p
: MMLocalProperty)
588 # An element that represents a function pointer to a global method
591 redef meth compile_macros
(v
, value
)
593 var pg
= _property
.global
594 v
.add_decl
("#define {pg.meth_call}(recv) (({pg.intro.cname}_t)CALL((recv), ({value})))")
597 redef meth compile_to_c
(v
, c
)
599 var p
= c
[_property
.global
]
604 # An element that represents a function pointer to the super method of a local method
607 redef meth compile_macros
(v
, value
)
610 v
.add_decl
("#define {p.super_meth_call}(recv) (({p.cname}_t)CALL((recv), ({value})))")
613 redef meth compile_to_c
(v
, c
)
615 var pc
= _property
.local_class
616 var g
= _property
.global
617 var lin
= c
.che
.linear_extension
620 #print "{c.module}::{c} for {pc.module}::{pc}::{_property} try {s.module}:{s}"
623 else if found
and c
.che
< s
then
626 #print "found {s.module}::{s}::{p}"
636 # An element that represents the value stored for a global attribute
639 redef meth compile_macros
(v
, value
)
641 var pg
= _property
.global
642 v
.add_decl
("#define {pg.attr_access}(recv) ATTR(recv, ({value}))")
645 redef meth compile_to_c
(v
, c
)
647 var ga
= v
.global_analysis
648 var p
= c
[_property
.global
]
649 return "/* {ga.color(self)}: Attribute {c}::{p} */"
653 # An element representing a class information
654 class AbsTableEltClass
656 # The local class where the information comes from
657 attr _local_class
: MMLocalClass
659 init(c
: MMLocalClass)
664 # The C macro name refering the value
665 meth symbol
: String is abstract
667 redef meth compile_macros
(v
, value
)
669 v
.add_decl
("#define {symbol} ({value})")
673 # An element of a class table representing a class information
676 special AbsTableEltClass
677 redef meth is_related_to
(c
)
679 var bc
= c
.module[_local_class
.global
]
684 # An element representing the id of a class in a module table
685 class TableEltClassId
686 special ModuleTableElt
687 special AbsTableEltClass
688 redef meth symbol
do return _local_class
.global
.id_id
692 return "{ga.compiled_classes[_local_class.global].id} /* Id of {_local_class} */"
696 # An element representing the constructor marker position in a class table
697 class TableEltClassInitTable
698 special TableEltClass
699 redef meth symbol
do return _local_class
.global
.init_table_pos_id
701 redef meth compile_to_c
(v
, c
)
703 var ga
= v
.global_analysis
704 var cc
= ga
.compiled_classes
[_local_class
.global
]
705 var linext
= c
.cshe
.reverse_linear_extension
707 while linext
[i
].global
!= _local_class
.global
do
710 return "{i} /* {ga.color(self)}: {c} < {cc.local_class}: superclass init_table position */"
714 # An element used for a cast
715 # Note: this element is both a TableElt and a ModuleTableElt.
716 # At the TableElt offset, there is the id of the super-class
717 # At the ModuleTableElt offset, there is the TableElt offset (ie. the color of the super-class).
718 class TableEltClassColor
719 special TableEltClass
720 special ModuleTableElt
721 redef meth symbol
do return _local_class
.global
.color_id
725 return "{ga.color(self)} /* Color of {_local_class} */"
728 redef meth compile_to_c
(v
, c
)
730 var ga
= v
.global_analysis
731 var cc
= ga
.compiled_classes
[_local_class
.global
]
732 return "{cc.id} /* {ga.color(self)}: {c} < {cc.local_class}: superclass typecheck marker */"
736 # A Group of elements introduced in the same global-class that are colored together
737 class TableEltComposite
739 attr _table
: Array[TableElt]
740 attr _cc
: CompiledClass
741 attr _offsets
: HashMap[MMLocalClass, Int]
742 redef meth length
do return _table
.length
743 redef meth is_related_to
(c
) do return c
.cshe
<= _cc
.local_class
745 meth add
(c
: MMLocalClass, tab
: Array[TableElt])
747 _offsets
[c
] = _table
.length
751 redef meth item
(i
) do return _table
[i
]
753 redef meth compile_to_c
(v
, c
) do abort
755 init(cc
: CompiledClass)
758 _table
= new Array[TableElt]
759 _offsets
= new HashMap[MMLocalClass, Int]
763 # The element that represent the class id
764 class TableEltClassSelfId
766 redef meth is_related_to
(c
) do return true
767 redef meth compile_to_c
(v
, c
)
769 var ga
= v
.global_analysis
770 return "{v.global_analysis.compiled_classes[c.global].id} /* {ga.color(self)}: Identity */"
775 class TableEltVftPointer
777 redef meth is_related_to
(c
) do return true
778 redef meth compile_to_c
(v
, c
)
780 var ga
= v
.global_analysis
781 return "/* {ga.color(self)}: Pointer to the classtable */"
785 ###############################################################################
787 # Used to sort local class in a deterministic total order
788 # The total order superset the class refinement and the class specialisation relations
790 special AbstractSorter[MMLocalClass]
791 redef meth compare
(a
, b
) do return a
.compare
(b
)
795 redef class MMLocalClass
796 # Comparaison in a total order that superset the class refinement and the class specialisation relations
797 meth compare
(b
: MMLocalClass): Int
802 else if a
.module.mhe
< b
.module then
804 else if b
.module.mhe
< a
.module then
814 return b
.name
.to_s
<=> a
.name
.to_s
818 # Declaration and macros related to the class table
819 meth declare_tables_to_c
(v
: CompilerVisitor)
822 var pi
= primitive_info
823 v
.add_decl
("extern const classtable_elt_t VFT_{name}[];")
825 # v.add_decl("val_t NEW_{name}(void);")
826 else if not pi
.tagged
then
828 var tbox
= "struct TBOX_{name}"
829 v
.add_decl
("{tbox} \{ const classtable_elt_t * vft; {t} val;};")
830 v
.add_decl
("val_t BOX_{name}({t} val);")
831 v
.add_decl
("#define UNBOX_{name}(x) ((({tbox} *)(VAL2OBJ(x)))->val)")
835 # Compilation of table and new (or box)
836 meth compile_tables_to_c
(v
: CompilerVisitor)
838 var cc
= v
.global_analysis
.compiled_classes
[self.global
]
839 var ctab
= cc
.class_table
840 var clen
= ctab
.length
841 if v
.global_analysis
.max_class_table_length
> ctab
.length
then
842 clen
= v
.global_analysis
.max_class_table_length
845 v
.add_instr
("const classtable_elt_t VFT_{name}[{clen}] = \{")
849 v
.add_instr
("\{0} /* Class Hole :( */,")
851 v
.add_instr
("\{(bigint) {e.compile_to_c(v, self)}},")
854 if clen
> ctab
.length
then
855 v
.add_instr
("\{0},"*(clen-ctab
.length
))
859 var itab
= cc
.instance_table
862 v
.add_instr
("/* Instance Hole :( */")
864 v
.add_instr
(e
.compile_to_c
(v
, self))
868 var pi
= primitive_info
870 v
.cfc
= new CFunctionContext(v
)
871 v
.nmc
= new NitMethodContext(null)
872 var s
= "val_t NEW_{name}(void)"
873 v
.add_instr
(s
+ " \{")
878 var self_var
= new ParamVariable(null, null)
879 var self_var_cname
= v
.cfc
.register_variable
(self_var
)
880 v
.nmc
.method_params
= [self_var
]
882 v
.add_instr
("obj_t obj;")
883 v
.add_instr
("obj = alloc(sizeof(val_t) * {itab.length});")
884 v
.add_instr
("obj->vft = (classtable_elt_t*)VFT_{name};")
885 v
.add_assignment
(self_var_cname
, "OBJ2VAL(obj)")
887 for g
in global_properties
do
889 var t
= p
.signature
.return_type
890 if p
isa MMAttribute and t
!= null then
891 # FIXME: Not compatible with sep compilation
892 assert p
isa MMSrcAttribute
894 assert np
isa AAttrPropdef
897 var e
= ne
.compile_expr
(v
)
898 v
.add_instr
("{p.global.attr_access}(obj) = {e};")
900 var pi
= t
.local_class
.primitive_info
901 if pi
!= null and pi
.tagged
then
902 var default
= t
.default_cvalue
903 v
.add_instr
("{p.global.attr_access}(obj) = {default};")
908 v
.add_instr
("return OBJ2VAL(obj);")
909 v
.cfc
.generate_var_decls
910 ctx_old
.append
(v
.ctx
)
915 var init_table_size
= cshe
.greaters
.length
+ 1
916 var init_table_decl
= "int init_table[{init_table_size}] = \{0{", 0" * (init_table_size-1)}};"
918 for g
in global_properties
do
920 # FIXME skip invisible constructors
921 if not p
.global
.is_init_for
(self) then continue
922 var params
= new Array[String]
924 for i
in [0..p
.signature
.arity
[ do
925 params
.add
("val_t p{i}")
928 args
.add
("init_table")
929 var s
= "val_t NEW_{self}_{p.global.intro.cname}({params.join(", ")}) \{"
932 v
.add_instr
(init_table_decl
)
933 v
.add_instr
("val_t self = NEW_{name}();")
934 v
.add_instr
("{p.cname}({args.join(", ")});")
935 v
.add_instr
("return self;")
939 else if not pi
.tagged
then
941 var tbox
= "struct TBOX_{name}"
942 v
.add_instr
("val_t BOX_{name}({t} val) \{")
944 v
.add_instr
("{tbox} *box = ({tbox}*)alloc(sizeof({tbox}));")
945 v
.add_instr
("box->vft = VFT_{name};")
946 v
.add_instr
("box->val = val;")
947 v
.add_instr
("return OBJ2VAL(box);")