1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 # Compile Nit code to Java code
17 # 3 runtime structures are used to represent Nit instance in Java generated code:
18 # * `RTClass` to represent a class, it's super-type table and its VFT
19 # * `RTMethod` to reprensent a compiled method definition
20 # * `RTVal` to reprensent a Nit instance, the null value or a native value
22 # More details are given in the documentation of these 3 classes.
24 # TODO Factorize with `abstract_compiler`
27 import rapid_type_analysis
31 redef class ToolContext
33 # Where to output the generated binary
34 var opt_output
= new OptionString("Output file", "-o", "--output")
36 # Where to output tmp files
37 var opt_compile_dir
= new OptionString("Directory used to generate temporary files", "--compile-dir")
41 option_context
.add_option
(opt_output
, opt_compile_dir
)
45 redef class ModelBuilder
47 # Start the Java compiler
48 fun run_java_compiler
(mainmodule
: MModule, runtime_type_analysis
: RapidTypeAnalysis) do
50 toolcontext
.info
("*** GENERATING JAVA ***", 1)
52 var compiler
= new JavaCompiler(mainmodule
, self, runtime_type_analysis
)
53 compiler
.do_compilation
56 toolcontext
.info
("*** END GENERATING JAVA: {time1-time0} ***", 2)
57 write_and_make
(compiler
)
60 # Write Java code and compile it into an executable jar
61 fun write_and_make
(compiler
: JavaCompiler) do
63 toolcontext
.info
("*** WRITING JAVA ***", 1)
65 compiler
.compile_dir
.mkdir
67 var jfiles
= write_java_files
(compiler
)
70 toolcontext
.info
("*** END WRITING JAVA: {time1-time0} ***", 2)
73 toolcontext
.info
("*** COMPILING JAVA ***", 1)
75 build_with_make
(compiler
, jfiles
)
76 write_shell_script
(compiler
)
79 toolcontext
.info
("*** END COMPILING JAVA: {time1-time0} ***", 2)
82 # Write files managed by `compiler` into concrete files
83 fun write_java_files
(compiler
: JavaCompiler): Array[String] do
84 var jfiles
= new Array[String]
85 for f
in compiler
.files
do
86 var file
= new FileWriter.open
("{compiler.compile_dir}/{f.filename}")
87 for line
in f
.lines
do file
.write
(line
)
89 jfiles
.add
(f
.filename
)
94 # Compile Java generated files using `make`
95 fun build_with_make
(compiler
: JavaCompiler, jfiles
: Array[String]) do
96 write_manifest
(compiler
)
97 write_makefile
(compiler
, jfiles
)
98 var compile_dir
= compiler
.compile_dir
99 var outname
= compiler
.outname
.to_path
.filename
100 toolcontext
.info
("make -N -C {compile_dir} -f {outname}.mk", 2)
102 if toolcontext
.verbose_level
>= 3 then
103 res
= sys
.system
("make -B -C {compile_dir} -f {outname}.mk 2>&1")
105 res
= sys
.system
("make -B -C {compile_dir} -f {outname}.mk 2>&1 > /dev/null")
107 if res
!= 0 then toolcontext
.error
(null, "make failed! Error code: {res}.")
110 # Write the Makefile used to compile Java generated files into an executable jar
111 fun write_makefile
(compiler
: JavaCompiler, jfiles
: Array[String]) do
112 # list class files from jfiles
113 var ofiles
= new List[String]
114 for f
in jfiles
do ofiles
.add
(f
.strip_extension
(".java") + ".class")
116 var compile_dir
= compiler
.compile_dir
117 var outname
= compiler
.outname
.to_path
.filename
118 var outpath
= (sys
.getcwd
/ compiler
.outname
).simplify_path
119 var makename
= "{compile_dir}/{outname}.mk"
120 var makefile
= new FileWriter.open
(makename
)
122 makefile
.write
("JC = javac\n")
123 makefile
.write
("JAR = jar\n\n")
125 makefile
.write
("all: {outpath}.jar\n\n")
127 makefile
.write
("{outpath}.jar: {compiler.mainmodule.jname}_Main.class\n")
128 makefile
.write
("\t$(JAR) cfm {outpath}.jar {outname}.mf {ofiles.join(" ")}\n\n")
130 makefile
.write
("{compiler.mainmodule.jname}_Main.class:\n")
131 makefile
.write
("\t$(JC) {jfiles.join(" ")}\n\n")
133 makefile
.write
("clean:\n")
134 makefile
.write
("\trm {ofiles.join(" ")} 2>/dev/null\n\n")
137 toolcontext
.info
("Generated makefile: {makename}", 2)
140 # Write the Java manifest file
141 private fun write_manifest
(compiler
: JavaCompiler) do
142 var compile_dir
= compiler
.compile_dir
143 var outname
= compiler
.outname
.to_path
.filename
144 var maniffile
= new FileWriter.open
("{compile_dir}/{outname}.mf")
145 maniffile
.write
("Manifest-Version: 1.0\n")
146 maniffile
.write
("Main-Class: {compiler.mainmodule.jname}_Main\n")
150 # Write a simple bash script that runs the jar like it was a binary generated by nitc
151 private fun write_shell_script
(compiler
: JavaCompiler) do
152 var outname
= compiler
.outname
153 var shfile
= new FileWriter.open
(outname
)
154 shfile
.write
("#!/bin/bash\n")
155 shfile
.write
("java -jar {outname}.jar \"$@\
"\n")
157 sys
.system
("chmod +x {outname}")
161 # Compiler that translates Nit code to Java code
163 # The main module of the program currently compiled
164 var mainmodule
: MModule
166 # Modelbuilder used to know the model and the AST
167 var modelbuilder
: ModelBuilder
169 # The result of the RTA (used to know live types and methods)
170 var runtime_type_analysis
: RapidTypeAnalysis
172 # Where to generate tmp files
173 var compile_dir
: String is lazy
do
174 var dir
= modelbuilder
.toolcontext
.opt_compile_dir
.value
175 if dir
== null then dir
= "nitj_compile"
179 # Name of the generated executable
180 var outname
: String is lazy
do
181 var name
= modelbuilder
.toolcontext
.opt_output
.value
182 if name
== null then name
= mainmodule
.jname
186 # The list of all associated files
187 # Used to generate .java files
188 var files
: Array[JavaCodeFile] = new Array[JavaCodeFile]
190 # Force the creation of a new file
191 # The point is to avoid contamination between must-be-compiled-separately files
192 fun new_file
(name
: String): JavaCodeFile do
193 var file
= new JavaCodeFile(name
)
198 # Kind of visitor to use
199 type VISITOR: JavaCompilerVisitor
201 # Initialize a visitor specific for the compiler engine
202 fun new_visitor
(filename
: String): VISITOR do
203 return new JavaCompilerVisitor(self, new_file
(filename
))
206 # RuntimeModel representation
207 private var rt_model
: JavaRuntimeModel is lazy
do return new JavaRuntimeModel
209 # Compile Nit code to Java
210 fun do_compilation
do
211 # compile java classes used to represents the runtime model of the program
212 rt_model
.compile_rtmodel
(self)
215 # compile class structures
216 compile_mclasses_to_java
218 # compile method structures
219 compile_mmethods_to_java
222 compile_main_function
225 # Prepare the boxes used to represent Java primitive types
226 fun compile_box_kinds
do
227 # Collect all bas box class
228 # FIXME: this is not completely fine with a separate compilation scheme
229 for classname
in ["Int", "Bool", "Byte", "Char", "Float"] do
230 var classes
= mainmodule
.model
.get_mclasses_by_name
(classname
)
231 if classes
== null then continue
232 assert classes
.length
== 1 else print classes
.join
(", ")
233 box_kinds
.add
(classes
.first
.mclass_type
)
237 # Types of boxes used to represent Java primitive types
238 var box_kinds
= new Array[MClassType]
240 # Generate a `RTClass` for each `MClass` found in model
242 # This is a global phase because we need to know all the program to build
243 # attributes, fill vft and type table.
244 fun compile_mclasses_to_java
do
245 for mclass
in mainmodule
.model
.mclasses
do
246 mclass
.compile_to_java
(new_visitor
("{mclass.rt_name}.java"))
250 # Generate a `RTMethod` for each `MMethodDef` found in model
252 # This is a separate phase.
253 fun compile_mmethods_to_java
do
254 for mmodule
in mainmodule
.in_importation
.greaters
do
255 for mclassdef
in mmodule
.mclassdefs
do
256 for mdef
in mclassdef
.mpropdefs
do
257 if mdef
isa MMethodDef then
258 mdef
.compile_to_java
(new_visitor
("{mdef.rt_name}.java"))
265 # Generate Java main that call Sys.main
266 fun compile_main_function
do
267 var v
= new_visitor
("{mainmodule.jname}_Main.java")
268 v
.add
("public class {mainmodule.jname}_Main \{")
269 v
.add
(" public static void main(String[] args) \{")
271 var main_type
= mainmodule
.sys_type
272 if main_type
!= null then
273 var mainmodule
= v
.compiler
.mainmodule
274 var glob_sys
= v
.init_instance
(main_type
)
275 var main_init
= mainmodule
.try_get_primitive_method
("init", main_type
.mclass
)
276 if main_init
!= null then
277 v
.send
(main_init
, [glob_sys
])
279 var main_method
= mainmodule
.try_get_primitive_method
("run", main_type
.mclass
) or else
280 mainmodule
.try_get_primitive_method
("main", main_type
.mclass
)
281 if main_method
!= null then
282 v
.send
(main_method
, [glob_sys
])
290 # The class visiting the AST
292 # A visitor is attached to one JavaCodeFile it writes into.
293 class JavaCompilerVisitor
296 # JavaCompiler used with this visitor
297 type COMPILER: JavaCompiler
299 # The associated compiler
300 var compiler
: JavaCompiler
302 # The file to write generated code into
303 var file
: JavaCodeFile
307 private var names
= new HashSet[String]
308 private var last
: Int = 0
310 # Return a new name based on `s` and unique in the visitor
311 fun get_name
(s
: String): String do
312 if not self.names
.has
(s
) then
316 var i
= self.last
+ 1
319 if not self.names
.has
(s2
) then
328 # Return an unique and stable identifier associated with an escapemark
329 fun escapemark_name
(e
: nullable EscapeMark): String do
331 var frame
= self.frame
333 if frame
.escapemark_names
.has_key
(e
) then return frame
.escapemark_names
[e
]
335 if name
== null then name
= "label"
336 name
= get_name
(name
)
337 frame
.escapemark_names
[e
] = name
341 # Insert a C label for associated with an escapemark
342 fun add_escape_label
(e
: nullable EscapeMark) do
343 if e
== null then return
344 if e
.escapes
.is_empty
then return
345 add
("BREAK_{escapemark_name(e)}: ")
350 # Registered variables
351 protected var variables
= new HashMap[Variable, RuntimeVariable]
353 # Return the local RuntimeVariable associated to a Nit local variable
354 fun variable
(variable
: Variable): RuntimeVariable do
355 if variables
.has_key
(variable
) then
356 return variables
[variable
]
358 var name
= get_name
("var_{variable.name}")
359 var mtype
= variable
.declared_type
.as(not null)
360 mtype
= anchor
(mtype
)
361 var res
= decl_var
(name
, mtype
)
362 variables
[variable
] = res
367 # Return a new uninitialized local RuntimeVariable with `name`
368 fun decl_var
(name
: String, mtype
: MType): RuntimeVariable do
369 var res
= new RuntimeVariable(name
, mtype
, mtype
)
370 res
.is_boxed
= not mtype
.is_java_primitive
371 add
("{mtype.java_type} {name} /* : {mtype} */;")
375 # Return a new uninitialized local RuntimeVariable
376 fun new_var
(mtype
: MType): RuntimeVariable do
377 mtype
= anchor
(mtype
)
378 var name
= self.get_name
("var")
379 return decl_var
(name
, mtype
)
384 # The current `JavaStaticFrame`
385 var frame
: nullable JavaStaticFrame = null is writable
387 # Return a new local RuntimeVariable initialized from `args[0]`
388 fun new_recv
(mtype
: MType): RuntimeVariable do
389 var res
= new_var
(mtype
)
390 add
("{res} = args[0];")
396 # Compile a call within a callsite
397 fun compile_callsite
(callsite
: CallSite, arguments
: Array[RuntimeVariable]): nullable RuntimeVariable do
398 var initializers
= callsite
.mpropdef
.initializers
399 if not initializers
.is_empty
then
400 var recv
= arguments
.first
403 for p
in initializers
do
404 if p
isa MMethod then
406 var msignature
= p
.intro
.msignature
407 if msignature
!= null then
408 for x
in msignature
.mparameters
do
409 args
.add arguments
[i
]
414 else if p
isa MAttribute then
415 info
("NOT YET IMPLEMENTED {class_name}::compile_callsite for MAttribute `{p}`")
416 #self.write_attribute(p, recv, arguments[i])
420 assert i
== arguments
.length
422 return send
(callsite
.mproperty
, [recv
])
425 return send
(callsite
.mproperty
, arguments
)
428 # Evaluate `args` as expressions in the call of `mpropdef` on `recv`.
430 # This method is used to manage varargs in signatures and returns the real array
431 # of runtime variables to use in the call.
432 fun varargize
(mpropdef
: MMethodDef, map
: nullable SignatureMap, recv
: RuntimeVariable, args
: SequenceRead[AExpr]): Array[RuntimeVariable] do
433 var msignature
= mpropdef
.new_msignature
or else mpropdef
.msignature
.as(not null)
434 var res
= new Array[RuntimeVariable]
437 if msignature
.arity
== 0 then return res
440 assert args
.length
== msignature
.arity
442 res
.add expr
(ne
, null)
447 # Eval in order of arguments, not parameters
448 var exprs
= new Array[RuntimeVariable].with_capacity
(args
.length
)
450 exprs
.add expr
(ne
, null)
453 # Fill `res` with the result of the evaluation according to the mapping
454 for i
in [0..msignature
.arity
[ do
455 var param
= msignature
.mparameters
[i
]
456 var j
= map
.map
.get_or_null
(i
)
459 res
.add
(null_instance
)
462 if param
.is_vararg
and map
.vararg_decl
> 0 then
463 var vararg
= exprs
.sub
(j
, map
.vararg_decl
)
464 var elttype
= param
.mtype
465 var arg
= self.vararg_instance
(mpropdef
, recv
, vararg
, elttype
)
474 # Generate a static call on a method definition (no receiver needed).
475 fun static_call
(mmethoddef
: MMethodDef, arguments
: Array[RuntimeVariable]): nullable RuntimeVariable do
476 var res
: nullable RuntimeVariable
477 var ret
= mmethoddef
.msignature
.as(not null).return_mtype
481 ret
= ret
.resolve_for
(mmethoddef
.mclassdef
.bound_mtype
, mmethoddef
.mclassdef
.bound_mtype
, mmethoddef
.mclassdef
.mmodule
, true)
482 res
= self.new_var
(ret
)
486 adapt_signature
(mmethoddef
, arguments
)
488 var rt_name
= mmethoddef
.rt_name
490 add
("{rt_name}.get{rt_name}().exec(new RTVal[]\{{arguments.join(",")}\});")
493 var ress
= new_expr
("{rt_name}.get{rt_name}().exec(new RTVal[]\{{arguments.join(",")}\});", compiler
.mainmodule
.object_type
)
498 # Generate a polymorphic send for `method` with `arguments`
499 fun send
(mmethod
: MMethod, arguments
: Array[RuntimeVariable]): nullable RuntimeVariable do
500 # Shortcut calls on primitives
501 if arguments
.first
.mcasttype
.is_java_primitive
then
502 return monomorphic_send
(mmethod
, arguments
.first
.mcasttype
, arguments
)
505 return table_send
(mmethod
, arguments
)
509 # Handle common special cases before doing the effective method invocation
510 # This methods handle the `==` and `!=` methods and the case of the null receiver.
511 # Note: a { is open in the generated C, that enclose and protect the effective method invocation.
512 # Client must not forget to close the } after them.
514 # The value returned is the result of the common special cases.
515 # If not null, client must compile it with the result of their own effective method invocation.
517 # If `before_send` can shortcut the whole message sending, a dummy `if(0){`
518 # is generated to cancel the effective method invocation that will follow
519 # TODO: find a better approach
520 private fun before_send
(res
: nullable RuntimeVariable, mmethod
: MMethodDef, arguments
: Array[RuntimeVariable]) do
521 var bool_type
= compiler
.mainmodule
.bool_type
522 var recv
= arguments
.first
523 var consider_null
= mmethod
.name
== "==" or mmethod
.name
== "!=" or mmethod
.name
== "is_same_instance"
524 if recv
.mcasttype
isa MNullableType or recv
.mcasttype
isa MNullType then
525 add
("if ({recv} == null || {recv}.is_null()) \{")
526 if mmethod
.name
== "==" or mmethod
.name
== "is_same_instance" then
527 if res
== null then res
= new_var
(bool_type
)
528 var arg
= arguments
[1]
529 if arg
.mcasttype
isa MNullableType then
530 add
("{res} = ({arg} == null || {arg}.is_null());")
531 else if arg
.mcasttype
isa MNullType then
532 add
("{res} = true; /* is null */")
534 add
("{res} = false; /* {arg.inspect} cannot be null */")
536 else if mmethod
.name
== "!=" then
537 if res
== null then res
= new_var
(bool_type
)
538 # res = self.new_var(bool_type)
539 var arg
= arguments
[1]
540 if arg
.mcasttype
isa MNullableType then
541 add
("{res} = ({arg} != null && !{arg}.is_null());")
542 else if arg
.mcasttype
isa MNullType then
543 add
("{res} = false; /* is null */")
545 add
("{res} = true; /* {arg.inspect} cannot be null */")
548 add_abort
("Receiver is null")
554 add
"/* recv ({recv}) cannot be null since it's a {recv.mcasttype}"
556 if consider_null
then
557 var arg
= arguments
[1]
558 if arg
.mcasttype
isa MNullType then
559 if res
== null then res
= new_var
(bool_type
)
560 if mmethod
.name
== "!=" then
561 add
("{res} = true; /* arg is null and recv is not */")
562 else # `==` and `is_same_instance`
563 add
("{res} = false; /* arg is null but recv is not */")
565 add
("\}") # closes the null case
566 add
("if (false) \{") # what follow is useless, Javac will drop it
571 # Perform a method call through vft
572 private fun table_send
(mmethod
: TableCallable, arguments
: Array[RuntimeVariable]): nullable RuntimeVariable do
575 if mmethod
isa MMethod then
577 name
= mmethod
.full_name
578 else if mmethod
isa MMethodDef then
580 name
= mmethod
.full_name
585 var recv
= arguments
.first
586 var rect
= mdef
.mclassdef
.bound_mtype
587 var msignature
= mdef
.msignature
.as(not null)
588 msignature
= msignature
.resolve_for
(rect
, rect
, compiler
.mainmodule
, true)
589 adapt_signature
(mdef
, arguments
)
591 var res
: nullable RuntimeVariable
592 var ret
= msignature
.return_mtype
596 res
= self.new_var
(ret
)
599 before_send
(res
, mdef
, arguments
)
601 add
"/* concrete call to {mdef} */"
603 var ress
= new_expr
("{recv}.rtclass.vft.get(\"{name}\
").exec(new RTVal[]\{{arguments.join(",")}\});", compiler
.mainmodule
.object_type
)
606 add
("{recv}.rtclass.vft.get(\"{name}\
").exec(new RTVal[]\{{arguments.join(",")}\});")
609 add
("\}") # closes the null case
614 # Generate a super call from a method definition
615 fun supercall
(m
: MMethodDef, recvtype
: MClassType, args
: Array[RuntimeVariable]): nullable RuntimeVariable do
616 return table_send
(m
, args
)
619 # Generate a monomorphic send for the method `m`, the type `t` and the arguments `args`
620 fun monomorphic_send
(m
: MMethod, t
: MType, args
: Array[RuntimeVariable]): nullable RuntimeVariable do
621 assert t
isa MClassType
622 var propdef
= m
.lookup_first_definition
(self.compiler
.mainmodule
, t
)
623 return self.static_call
(propdef
, args
)
628 # Add a line (will be suffixed by `\n`)
629 fun add
(line
: String) do file
.lines
.add
("{line}\n")
631 # Add a new partial line (no `\n` suffix)
632 fun addn
(line
: String) do file
.lines
.add
(line
)
634 # Compile a statement (if any)
635 fun stmt
(nexpr
: nullable AExpr) do
636 if nexpr
== null then return
637 if nexpr
.mtype
== null and not nexpr
.is_typed
then
638 # Untyped expression.
639 # Might mean dead code or invalid code
641 add_abort
("FATAL: bad statement executed.")
645 var old
= self.current_node
651 # Compile an expression an return its result
652 # `mtype` is the expected return type, pass null if no specific type is expected.
653 fun expr
(nexpr
: AExpr, mtype
: nullable MType): RuntimeVariable do
654 var old
= current_node
658 if nexpr
.mtype
!= null then
659 res
= nexpr
.expr
(self)
663 # Untyped expression.
664 # Might mean dead code or invalid code.
666 add_abort
("FATAL: bad expression executed.")
667 # and return a placebo result to please the C compiler
668 if mtype
== null then mtype
= compiler
.mainmodule
.object_type
671 self.current_node
= old
675 if mtype
!= null then
676 mtype
= anchor
(mtype
)
677 res
= autobox
(res
, mtype
)
684 # Alias for `self.expr(nexpr, self.bool_type)`
685 fun expr_bool
(nexpr
: AExpr): RuntimeVariable do
686 return expr
(nexpr
, compiler
.mainmodule
.bool_type
)
689 # Correctly assign a left and a right value
690 # Boxing and unboxing is performed if required
691 fun assign
(left
, right
: RuntimeVariable) do
692 add
("{left} = {autobox(right, left.mtype)};")
695 # Generate a return with `value`
696 fun ret
(value
: RuntimeVariable) do
697 var frame
= self.frame
699 var returnvar
= frame
.returnvar
700 if returnvar
!= null then
701 assign
(returnvar
, value
)
703 self.add
("break {frame.returnlabel.as(not null)};")
706 # Return a new local RuntimeVariable initialized with the Java expression `jexpr`.
708 # `mtype` is used for the Java return variable initialization.
709 fun new_expr
(jexpr
: String, mtype
: MType): RuntimeVariable do
710 var res
= new_var
(mtype
)
711 add
("{res} = {jexpr};")
715 # Generate generic abort
717 # Used by aborts, asserts, casts, etc.
718 fun add_abort
(message
: String) do
719 add
("System.err.print(\"Runtime error
: {message}\
");")
723 # Abort without displaying the cause.
725 # Used to customizable errors.
726 private fun add_raw_abort
do
727 var node
= current_node
729 add
("System.err.print(\" ({node.location.short_location})\
");")
731 add
("System.err.println(\"\
");")
732 add
("System.exit(1);")
736 fun add_cast
(value
: RuntimeVariable, mtype
: MType) do
737 var res
= type_test
(value
, mtype
)
738 add
("if (!{res}) \{")
739 add
("System.err.print(\"Runtime error
: Cast failed
. Expected `{mtype.to_s.escape_to_c}`, got
`\" + {value}.rtclass.class_name + \"`\
");")
746 # Anchor a type to the main module and the current receiver
747 fun anchor
(mtype
: MType): MType do
748 if not mtype
.need_anchor
then return mtype
749 return mtype
.anchor_to
(compiler
.mainmodule
, frame
.as(not null).receiver
)
752 # Adapt the arguments of a method according to targetted `MMethodDef`
753 fun adapt_signature
(m
: MMethodDef, args
: Array[RuntimeVariable]) do
754 var msignature
= m
.msignature
.as(not null).resolve_for
(
755 m
.mclassdef
.bound_mtype
,
756 m
.mclassdef
.bound_mtype
,
757 m
.mclassdef
.mmodule
, true)
758 args
.first
= autobox
(args
.first
, compiler
.mainmodule
.object_type
)
759 for i
in [0..msignature
.arity
[ do
760 args
[i
+1] = autobox
(args
[i
+ 1], compiler
.mainmodule
.object_type
)
764 # Box primitive `value` to `mtype`.
765 private fun box
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
766 if value
.is_boxed
then return value
767 var obj_type
= compiler
.mainmodule
.object_type
768 if value
.mtype
isa MNullType then
769 return new_expr
("new RTVal(null, null)", compiler
.mainmodule
.model
.null_type
)
771 var mbox
= value
.mtype
.as(MClassType).mclass
772 return new_expr
("new RTVal({mbox.rt_name}.get{mbox.rt_name}(), {value})", obj_type
)
775 # Unbox primitive `value` to `mtype`.
776 private fun unbox
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
777 if not value
.is_boxed
then return value
778 if not mtype
.is_java_primitive
then return value
779 if compiler
.box_kinds
.has
(mtype
) then
780 return new_expr
("({mtype.java_type}){value}.value", mtype
)
782 info
"NOT YET IMPLEMENTED unbox for {value} ({mtype})"
787 # Box or unbox primitive `value` to `mtype` if needed.
788 private fun autobox
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
789 if mtype
.is_java_primitive
then return unbox
(value
, mtype
)
790 return box
(value
, mtype
)
793 # Can this `value` be a primitive Java value?
794 private fun can_be_primitive
(value
: RuntimeVariable): Bool do
795 var t
= value
.mcasttype
.undecorate
796 if not t
isa MClassType then return false
797 var k
= t
.mclass
.kind
798 return k
== interface_kind
or t
.is_java_primitive
801 # Generate a polymorphic subtype test
802 fun type_test
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
803 add
("/* {value.inspect} isa {mtype} */")
804 var res
= self.new_var
(compiler
.mainmodule
.bool_type
)
806 # check color is in table
807 var maybenull
= (value
.mcasttype
isa MNullableType or value
.mcasttype
isa MNullType)
809 add
("if({value} == null || {value}.is_null()) \{")
810 add
("{res} = true && {mtype isa MNullableType};")
813 if mtype
isa MNullableType then mtype
= mtype
.mtype
814 var mclass
= mtype
.as(MClassType).mclass
815 add
("{res} = {value}.rtclass.supers.get(\"{mclass.jname}\
") == {mclass.rt_name}.get{mclass.rt_name}();")
822 # Generate the code required to dynamically check if 2 objects share the same runtime type
823 fun is_same_type_test
(value1
, value2
: RuntimeVariable): RuntimeVariable do
824 var res
= self.new_var
(compiler
.mainmodule
.bool_type
)
825 add
("{res} = {value1}.rtclass == {value2}.rtclass;")
831 # Generate an integer value
832 fun int_instance
(value
: Int): RuntimeVariable do
833 var t
= compiler
.mainmodule
.int_type
834 return new RuntimeVariable(value
.to_s
, t
, t
)
837 # Generate a byte value
838 fun byte_instance
(value
: Byte): RuntimeVariable do
839 var t
= compiler
.mainmodule
.byte_type
840 return new RuntimeVariable(value
.to_s
, t
, t
)
843 # Generate a char value
844 fun char_instance
(value
: Char): RuntimeVariable do
845 var t
= compiler
.mainmodule
.char_type
846 return new RuntimeVariable("'{value.to_s.escape_to_c}'", t
, t
)
849 # Generate a float value
851 # FIXME pass a Float, not a string
852 fun float_instance
(value
: String): RuntimeVariable do
853 var t
= compiler
.mainmodule
.float_type
854 return new RuntimeVariable(value
.to_s
, t
, t
)
857 # Generate an integer value
858 fun bool_instance
(value
: Bool): RuntimeVariable do
859 var t
= compiler
.mainmodule
.bool_type
860 return new RuntimeVariable(value
.to_s
, t
, t
)
863 # Generate the `null` value
864 fun null_instance
: RuntimeVariable do
865 var t
= compiler
.mainmodule
.model
.null_type
866 return new RuntimeVariable("null", t
, t
)
869 # Get an instance of a array for a vararg
870 fun vararg_instance
(mpropdef
: MPropDef, recv
: RuntimeVariable, varargs
: Array[RuntimeVariable], elttype
: MType): RuntimeVariable do
871 # TODO handle dynamic types
872 info
("NOT YET IMPLEMENTED vararg_instance")
874 # TODO return array_instance(varargs, elttype)
879 # Generate a alloc-instance + init-attributes
880 fun init_instance
(mtype
: MClassType): RuntimeVariable do
881 var rt_name
= mtype
.mclass
.rt_name
882 var res
= new_expr
("new RTVal({rt_name}.get{rt_name}())", mtype
)
883 generate_init_attr
(self, res
, mtype
)
887 # Generate code that initialize the attributes on a new instance
888 fun generate_init_attr
(v
: JavaCompilerVisitor, recv
: RuntimeVariable, mtype
: MClassType) do
889 var cds
= mtype
.collect_mclassdefs
(v
.compiler
.mainmodule
).to_a
890 v
.compiler
.mainmodule
.linearize_mclassdefs
(cds
)
892 for npropdef
in v
.compiler
.modelbuilder
.collect_attr_propdef
(cd
) do
893 npropdef
.init_expr
(v
, recv
)
898 # Generate a Nit "is" for two runtime_variables
899 fun equal_test
(value1
, value2
: RuntimeVariable): RuntimeVariable do
900 var res
= new_var
(compiler
.mainmodule
.bool_type
)
901 if value2
.mtype
.is_java_primitive
and not value1
.mtype
.is_java_primitive
then
906 if value1
.mtype
.is_java_primitive
then
907 if value2
.mtype
== value1
.mtype
then
908 add
("{res} = {value1} == {value2}; /* == with two primitives */")
909 else if value2
.mtype
.is_java_primitive
then
910 add
("{res} = true; /* incompatible types {value1.mtype} vs. {value2.mtype}*/")
911 # else if value1.mtype.is_tagged then
912 # add("{res} = ({value2} != NULL) && ({autobox(value2, value1.mtype)} == {value1});")
914 var rt_name
= value1
.mtype
.as(MClassType).mclass
.rt_name
915 add
("{res} = ({value2} != null) && ({value2}.rtclass == {rt_name}.get{rt_name}());")
917 add
("{res} = ({self.autobox(value2, value1.mtype)} == {value1});")
922 var maybe_null
= true
923 var test
= new Array[String]
924 var t1
= value1
.mcasttype
925 if t1
isa MNullableType then
926 test
.add
("{value1} != null && !{value1}.is_null()")
931 var t2
= value2
.mcasttype
932 if t2
isa MNullableType then
933 test
.add
("{value2} != null && !{value2}.is_null()")
939 var incompatible
= false
941 if t1
.is_java_primitive
then
944 # No need to compare class
945 else if t2
.is_java_primitive
then
947 else if can_be_primitive
(value2
) then
948 if t1
.is_java_primitive
then
949 self.add
("{res} = {value1} == {value2}; /* t1 is primitive and t2 can be */")
952 # if not compiler.modelbuilder.toolcontext.opt_no_tag_primitives.value then
953 # test.add("(!{extract_tag(value2)})")
955 test
.add
("{value1}.rtclass == {value2}.rtclass")
959 else if t2
.is_java_primitive
then
961 if can_be_primitive
(value1
) then
962 if t2
.is_java_primitive
then
963 self.add
("{res} = {value1} == {value2}; /* t2 is primitive and t1 can be */")
966 test
.add
("{value1}.rtclass == {value2}.rtclass")
976 self.add
("{res} = {value1} == {value2}; /* incompatible types {t1} vs. {t2}; but may be NULL*/")
979 self.add
("{res} = false; /* incompatible types {t1} vs. {t2}; cannot be NULL */")
983 if primitive
!= null then
984 if primitive
.is_java_primitive
then
985 self.add
("{res} = {value1} == {value2};")
988 test
.add
("({value1}.value == {value2}.value")
989 else if can_be_primitive
(value1
) and can_be_primitive
(value2
) then
990 test
.add
("{value1}.rtclass == {value2}.rtclass")
991 var s
= new Array[String]
992 for b
in compiler
.box_kinds
do
993 var rt_name
= b
.mclass
.rt_name
994 s
.add
"({value1}.rtclass == {rt_name}.get{rt_name}()) && ({value1}.value.equals({value2}.value))"
995 if b
.mclass
.name
== "Float" then
996 s
.add
"({value1}.rtclass == RTClass_kernel_Float.getRTClass_kernel_Float() && {value1}.rtclass == {value2}.rtclass && Math.abs((double)({value1}.value)) == 0.0 && Math.abs((double)({value2}.value)) == 0.0)"
1000 self.add
("{res} = {value1} == {value2}; /* both can be primitive */")
1003 test
.add
("({s.join(" || ")})")
1005 self.add
("{res} = {value1} == {value2}; /* no primitives */")
1008 self.add
("{res} = {value1} == {value2} || ({test.join(" && ")});")
1014 # Generate a polymorphic attribute is_set test
1015 fun isset_attribute
(a
: MAttribute, recv
: RuntimeVariable): RuntimeVariable do
1016 # TODO self.check_recv_notnull(recv)
1017 var res
= new_var
(compiler
.mainmodule
.bool_type
)
1019 # What is the declared type of the attribute?
1020 var mtype
= a
.intro
.static_mtype
.as(not null)
1021 var intromclassdef
= a
.intro
.mclassdef
1022 mtype
= mtype
.resolve_for
(intromclassdef
.bound_mtype
, intromclassdef
.bound_mtype
, intromclassdef
.mmodule
, true)
1024 if mtype
isa MNullableType then
1025 add
("{res} = true; /* easy isset: {a} on {recv.inspect} */")
1028 add
("{res} = {recv}.attrs.get(\"{a.jname}\
") != null; /* {a} on {recv.inspect} */")
1032 # Generate a polymorphic attribute read
1033 fun read_attribute
(a
: MAttribute, recv
: RuntimeVariable): RuntimeVariable do
1034 # TODO check_recv_notnull(recv)
1035 # TODO compile_check(v)
1036 # What is the declared type of the attribute?
1037 var ret
= a
.intro
.static_mtype
.as(not null)
1038 var intromclassdef
= a
.intro
.mclassdef
1039 ret
= ret
.resolve_for
(intromclassdef
.bound_mtype
, intromclassdef
.bound_mtype
, intromclassdef
.mmodule
, true)
1041 # Check for Uninitialized attribute
1042 if not ret
isa MNullableType then check_attribute
(a
, recv
)
1044 return new_expr
("{recv}.attrs.get(\"{a.jname}\
")", ret
)
1047 # Generate a polymorphic attribute write
1048 fun write_attribute
(a
: MAttribute, recv
: RuntimeVariable, value
: RuntimeVariable) do
1049 # TODO check_recv_notnull(recv)
1050 add
"{recv}.attrs.put(\"{a.jname}\
", {autobox(value, compiler.mainmodule.object_type)});"
1053 # Check uninitialized attribute
1054 fun check_attribute
(a
: MAttribute, recv
: RuntimeVariable) do
1055 add
"if({recv}.attrs.get(\"{a.jname}\
") == null) \{"
1056 add_abort
"Uninitialized attribute {a.name}"
1062 # Display a info message
1063 fun info
(str
: String) do compiler
.modelbuilder
.toolcontext
.info
(str
, 0)
1066 # A file containing Java code.
1070 var filename
: String
1073 var lines
: List[String] = new List[String]
1077 # A Java compatible name for `self`
1078 private fun jname
: String do return name
.to_cmangle
1081 # Handler for runtime classes generation
1083 # We need 3 kinds of runtime structures:
1084 # * `RTClass` to represent a global class
1085 # * `RTMethod` to represent a method definition
1086 # * `RTVal` to represent runtime variables
1087 class JavaRuntimeModel
1089 # Compile JavaRuntimeModel structures
1090 fun compile_rtmodel
(compiler
: JavaCompiler) do
1091 compile_rtclass
(compiler
)
1092 compile_rtmethod
(compiler
)
1093 compile_rtval
(compiler
)
1096 # Compile the abstract runtime class structure
1098 # Runtime classes have 3 attributes:
1099 # * `class_name`: the class name as a String
1100 # * `vft`: the virtual function table for the class (flattened)
1101 # * `supers`: the super type table (used for type tests)
1102 fun compile_rtclass
(compiler
: JavaCompiler) do
1103 var v
= compiler
.new_visitor
("RTClass.java")
1104 v
.add
("import java.util.HashMap;")
1105 v
.add
("public abstract class RTClass \{")
1106 v
.add
(" public String class_name;")
1107 v
.add
(" public HashMap<String, RTMethod> vft = new HashMap<>();")
1108 v
.add
(" public HashMap<String, RTClass> supers = new HashMap<>();")
1109 v
.add
(" protected RTClass() \{\}")
1113 # Compile the abstract runtime method structure
1115 # Method body is executed through the `exec` method:
1116 # * `exec` always take an array of RTVal as arg, the first one must be the receiver
1117 # * `exec` always returns a RTVal (or null if the Nit return type is void)
1118 fun compile_rtmethod
(compiler
: JavaCompiler) do
1119 var v
= compiler
.new_visitor
("RTMethod.java")
1120 v
.add
("public abstract class RTMethod \{")
1121 v
.add
(" protected RTMethod() \{\}")
1122 v
.add
(" public abstract RTVal exec(RTVal[] args);")
1126 # Compile the runtime value structure
1128 # RTVal both represents object instances and primitives values:
1129 # * object instances:
1130 # * `rtclass` the class of the RTVal is instance of
1131 # * `attrs` contains the attributes of the instance
1132 # * primitive values:
1133 # * `rtclass` represents the class of the primitive value Nit type
1134 # * `value` contains the primitive value of the instance
1136 # * they must have both `rtclass` and `value` as null
1137 fun compile_rtval
(compiler
: JavaCompiler) do
1138 var v
= compiler
.new_visitor
("RTVal.java")
1139 v
.add
("import java.util.HashMap;")
1140 v
.add
("public class RTVal \{")
1141 v
.add
(" public RTClass rtclass;")
1142 v
.add
(" public HashMap<String, RTVal> attrs = new HashMap<>();")
1143 v
.add
(" Object value;")
1144 v
.add
(" public RTVal(RTClass rtclass) \{")
1145 v
.add
(" this.rtclass = rtclass;")
1147 v
.add
(" public RTVal(RTClass rtclass, Object value) \{")
1148 v
.add
(" this.rtclass = rtclass;")
1149 v
.add
(" this.value = value;")
1151 v
.add
(" public boolean is_null() \{ return rtclass == null && value == null; \}")
1156 # A runtime variable hold a runtime value in Java.
1157 # Runtime variables are associated to Nit local variables and intermediate results in Nit expressions.
1158 class RuntimeVariable
1160 # The name of the variable in the Java code
1163 # The static type of the variable (as declard in Java)
1166 # The current casted type of the variable (as known in Nit)
1167 var mcasttype
: MType is writable
1169 # If the variable exaclty a mcasttype?
1170 # false (usual value) means that the variable is a mcasttype or a subtype.
1171 var is_exact
: Bool = false is writable
1173 # Is this variable declared as a RTVal or a Java primitive one?
1174 var is_boxed
= false
1176 redef fun to_s
do return name
1181 if self.is_exact
then
1182 exact_str
= " exact"
1187 if self.mtype
== self.mcasttype
then
1188 type_str
= "{mtype}{exact_str}"
1190 type_str
= "{mtype}({mcasttype}{exact_str})"
1192 return "<{name}:{type_str}>"
1196 # The static context of a visited property in a `JavaCompilerVisitor`
1197 class JavaStaticFrame
1198 # The associated visitor
1199 var visitor
: JavaCompilerVisitor
1201 # The executed property.
1202 # A Method in case of a call, an attribute in case of a default initialization.
1203 var mpropdef
: MPropDef
1205 # The static type of the receiver
1206 var receiver
: MClassType
1208 # Arguments of the method (the first is the receiver)
1209 var arguments
: Array[RuntimeVariable]
1211 # The runtime_variable associated to the return (in a function)
1212 var returnvar
: nullable RuntimeVariable = null is writable
1214 # The label at the end of the property
1215 var returnlabel
: nullable String = null is writable
1217 # Labels associated to a each escapemarks.
1218 # Because of inlinings, escape-marks must be associated to their context (the frame)
1219 private var escapemark_names
= new HashMap[EscapeMark, String]
1222 redef class Location
1223 # Return a shortened version of the location with `"{file}:{line_start}"`
1224 fun short_location
: String do
1225 var file
= self.file
1226 if file
== null then return "<no file>:{line_start}"
1227 return "{file.filename.escape_to_c}:{line_start}"
1232 # Return the Java type associated to a given Nit static type
1233 fun java_type
: String do return "RTVal"
1235 # Is the associated Java type a primitive one?
1237 # ENSURE `result == (java_type != "Object")`
1238 var is_java_primitive
: Bool is lazy
do return java_type
!= "RTVal"
1241 redef class MClassType
1243 redef var java_type
is lazy
do
1244 if mclass
.name
== "Int" then
1246 else if mclass
.name
== "Bool" then
1248 else if mclass
.name
== "Char" then
1250 else if mclass
.name
== "Float" then
1252 else if mclass
.name
== "Byte" then
1254 else if mclass
.name
== "NativeString" then
1256 else if mclass
.name
== "NativeArray" then
1266 private fun rt_name
: String do return "RTClass_{intro.mmodule.jname}_{jname}"
1268 # Generate a Java RTClass for a Nit MClass
1269 fun compile_to_java
(v
: JavaCompilerVisitor) do
1270 v
.add
("public class {rt_name} extends RTClass \{")
1271 v
.add
(" protected static RTClass instance;")
1272 v
.add
(" private {rt_name}() \{")
1273 v
.add
(" this.class_name = \"{name}\
";")
1275 compile_type_table
(v
)
1277 v
.add
(" public static RTClass get{rt_name}() \{")
1278 v
.add
(" if(instance == null) \{")
1279 v
.add
(" instance = new {rt_name}();")
1281 v
.add
(" return instance;")
1286 # Compile the virtual function table for the mclass
1287 private fun compile_vft
(v
: JavaCompilerVisitor) do
1288 # TODO handle generics
1289 if mclass_type
.need_anchor
then return
1290 var mclassdefs
= mclass_type
.collect_mclassdefs
(v
.compiler
.mainmodule
).to_a
1291 v
.compiler
.mainmodule
.linearize_mclassdefs
(mclassdefs
)
1293 var mainmodule
= v
.compiler
.mainmodule
1294 for mclassdef
in mclassdefs
.reversed
do
1295 for mprop
in mclassdef
.intro_mproperties
do
1296 var mpropdef
= mprop
.lookup_first_definition
(mainmodule
, intro
.bound_mtype
)
1297 if not mpropdef
isa MMethodDef then continue
1298 var rt_name
= mpropdef
.rt_name
1299 v
.add
("this.vft.put(\"{mprop.full_name}\
", {rt_name}.get{rt_name}());")
1301 # fill super next definitions
1302 while mpropdef
.has_supercall
do
1303 var prefix
= mpropdef
.full_name
1304 mpropdef
= mpropdef
.lookup_next_definition
(mainmodule
, intro
.bound_mtype
)
1305 rt_name
= mpropdef
.rt_name
1306 v
.add
("this.vft.put(\"{prefix}\
", {rt_name}.get{rt_name}());")
1312 # Compile the type table for the MClass
1313 fun compile_type_table
(v
: JavaCompilerVisitor) do
1314 for pclass
in in_hierarchy
(v
.compiler
.mainmodule
).greaters
do
1315 if pclass
== self then
1316 v
.add
("supers.put(\"{pclass.jname}\
", this);")
1318 v
.add
("supers.put(\"{pclass.jname}\
", {pclass.rt_name}.get{pclass.rt_name}());")
1324 # Used as a common type between MMethod and MMethodDef for `table_send`
1325 private interface TableCallable
1332 redef class MMethodDef
1336 private fun rt_name
: String do
1337 return "RTMethod_{mclassdef.mmodule.jname}_{mclassdef.mclass.jname}_{mproperty.jname}"
1340 # Generate a Java RTMethod for `self`
1341 fun compile_to_java
(v
: JavaCompilerVisitor) do
1342 v
.add
("public class {rt_name} extends RTMethod \{")
1343 v
.add
(" protected static RTMethod instance;")
1344 v
.add
(" public static RTMethod get{rt_name}() \{")
1345 v
.add
(" if(instance == null) \{")
1346 v
.add
(" instance = new {rt_name}();")
1348 v
.add
(" return instance;")
1351 v
.add
(" public RTVal exec(RTVal[] args) \{")
1352 compile_inside_to_java
(v
)
1357 # Compile the body of this function
1358 fun compile_inside_to_java
(v
: JavaCompilerVisitor) do
1360 var modelbuilder
= v
.compiler
.modelbuilder
1361 var node
= modelbuilder
.mpropdef2node
(self)
1363 var recv
= mclassdef
.bound_mtype
1364 var arguments
= new Array[RuntimeVariable]
1365 var frame
= new JavaStaticFrame(v
, self, recv
, arguments
)
1368 var selfvar
= v
.decl_var
("self", recv
)
1369 arguments
.add
(selfvar
)
1370 var boxed
= v
.new_expr
("args[0]", v
.compiler
.mainmodule
.object_type
)
1371 v
.add
"{selfvar} = {v.autobox(boxed, recv)};"
1373 var msignature
= self.msignature
1375 if msignature
!= null then
1376 ret
= msignature
.return_mtype
1378 var retvar
= v
.decl_var
("ret", ret
)
1379 if ret
.name
== "Int" then v
.add
"{retvar} = 0;"
1380 if ret
.name
== "Float" then v
.add
"{retvar} = 0.0;"
1381 if ret
.name
== "Bool" then v
.add
"{retvar} = false;"
1382 if ret
.name
== "Char" then v
.add
"{retvar} = 0;"
1383 if ret
.name
== "Byte" then v
.add
"{retvar} = 0;"
1384 frame
.returnvar
= retvar
1387 frame
.returnlabel
= v
.get_name
("RET_LABEL")
1389 v
.current_node
= node
1391 v
.add_abort
("Abstract method `{mproperty.name}` called on `\" + {selfvar}.rtclass
.class_name
+\
"`")
1392 v
.add
("return null;")
1395 v
.current_node
= null
1397 v
.add
("{frame.returnlabel.as(not null)}: \{")
1399 if node
isa APropdef then
1400 node
.compile_to_java
(v
, self, arguments
)
1401 else if node
isa AClassdef then
1402 node
.compile_to_java
(v
, self, arguments
)
1409 v
.add
("return {v.autobox(frame.returnvar.as(not null), v.compiler.mainmodule.object_type)};")
1411 v
.add
("return null;")
1416 redef class AClassdef
1417 private fun compile_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef, arguments
: Array[RuntimeVariable]) do
1418 if mpropdef
== self.mfree_init
then
1419 assert mpropdef
.mproperty
.is_root_init
1420 if not mpropdef
.is_intro
then
1421 v
.supercall
(mpropdef
, arguments
.first
.mtype
.as(MClassType), arguments
)
1429 redef class APropdef
1431 # Compile that property definition to java code
1432 fun compile_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef, arguments
: Array[RuntimeVariable]) do
1433 v
.info
("NOT YET IMPLEMENTED {class_name}::compile_to_java")
1437 redef class AMethPropdef
1438 redef fun compile_to_java
(v
, mpropdef
, arguments
) do
1439 if mpropdef
.msignature
!= null then
1441 for mparam
in mpropdef
.msignature
.as(not null).mparameters
do
1442 var variable
= n_signature
.as(not null).n_params
[i
].variable
1443 if variable
== null then continue
1444 var argvar
= v
.variable
(variable
)
1445 v
.assign
(argvar
, v
.new_expr
("args[{i + 1}]", v
.compiler
.mainmodule
.object_type
))
1446 arguments
.add
(argvar
)
1451 # Call the implicit super-init
1452 var auto_super_inits
= self.auto_super_inits
1453 if auto_super_inits
!= null then
1454 var args
= [arguments
.first
]
1455 for auto_super_init
in auto_super_inits
do
1456 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
1458 for i
in [0..auto_super_init
.msignature
.arity
+1[ do
1459 args
.add
(arguments
[i
])
1461 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
1462 v
.compile_callsite
(auto_super_init
, args
)
1465 if auto_super_call
then
1466 v
.supercall
(mpropdef
, arguments
.first
.mtype
.as(MClassType), arguments
)
1469 compile_inside_to_java
(v
, mpropdef
, arguments
)
1472 # Compile the inside of the method body
1473 private fun compile_inside_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef, arguments
: Array[RuntimeVariable]) do
1474 # Compile intern methods
1475 if mpropdef
.is_intern
then
1476 if compile_intern_to_java
(v
, mpropdef
, arguments
) then return
1477 v
.info
("NOT YET IMPLEMENTED compile_intern for {mpropdef}")
1478 v
.ret
(v
.null_instance
)
1482 # Compile block if any
1483 var n_block
= n_block
1484 if n_block
!= null then
1490 # Compile an intern method using Java primitives
1491 fun compile_intern_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef, arguments
: Array[RuntimeVariable]): Bool do
1492 var pname
= mpropdef
.mproperty
.name
1493 var cname
= mpropdef
.mclassdef
.mclass
.name
1494 var ret
= mpropdef
.msignature
.as(not null).return_mtype
1495 if cname
== "Int" then
1496 if pname
== "output" then
1497 v
.add
("System.out.println({arguments[0]});")
1498 v
.ret
(v
.null_instance
)
1500 else if pname
== "object_id" then
1501 v
.ret
(arguments
.first
)
1503 else if pname
== "+" then
1504 v
.ret
(v
.new_expr
("{arguments[0]} + {arguments[1]}", ret
.as(not null)))
1506 else if pname
== "-" then
1507 v
.ret
(v
.new_expr
("{arguments[0]} - {arguments[1]}", ret
.as(not null)))
1509 else if pname
== "unary -" then
1510 v
.ret
(v
.new_expr
("-{arguments[0]}", ret
.as(not null)))
1512 else if pname
== "unary +" then
1515 else if pname
== "*" then
1516 v
.ret
(v
.new_expr
("{arguments[0]} * {arguments[1]}", ret
.as(not null)))
1518 else if pname
== "/" then
1519 v
.ret
(v
.new_expr
("{arguments[0]} / {arguments[1]}", ret
.as(not null)))
1521 else if pname
== "%" then
1522 v
.ret
(v
.new_expr
("{arguments[0]} % {arguments[1]}", ret
.as(not null)))
1524 else if pname
== "lshift" then
1525 v
.ret
(v
.new_expr
("{arguments[0]} << {arguments[1]}", ret
.as(not null)))
1527 else if pname
== "rshift" then
1528 v
.ret
(v
.new_expr
("{arguments[0]} >> {arguments[1]}", ret
.as(not null)))
1530 else if pname
== "==" then
1531 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1533 else if pname
== "!=" then
1534 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1535 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1537 else if pname
== "<" then
1538 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1540 else if pname
== ">" then
1541 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1543 else if pname
== "<=" then
1544 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1546 else if pname
== ">=" then
1547 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1549 else if pname
== "to_f" then
1550 v
.ret
(v
.new_expr
("(double){arguments[0]}", ret
.as(not null)))
1552 else if pname
== "to_b" then
1553 v
.ret
(v
.new_expr
("(byte){arguments[0]}", ret
.as(not null)))
1555 else if pname
== "ascii" then
1556 v
.ret
(v
.new_expr
("(char){arguments[0]}", ret
.as(not null)))
1559 else if cname
== "Char" then
1560 if pname
== "output" then
1561 v
.add
("System.out.print({arguments[0]});")
1562 v
.ret
(v
.null_instance
)
1564 else if pname
== "object_id" then
1565 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1567 else if pname
== "successor" then
1568 v
.ret
(v
.new_expr
("(char)({arguments[0]} + {arguments[1]})", ret
.as(not null)))
1570 else if pname
== "predecessor" then
1571 v
.ret
(v
.new_expr
("(char)({arguments[0]} - {arguments[1]})", ret
.as(not null)))
1573 else if pname
== "==" then
1574 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1576 else if pname
== "!=" then
1577 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1578 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1580 else if pname
== "<" then
1581 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1583 else if pname
== ">" then
1584 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1586 else if pname
== "<=" then
1587 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1589 else if pname
== ">=" then
1590 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1592 else if pname
== "to_i" then
1593 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1595 else if pname
== "ascii" then
1596 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1599 else if cname
== "Byte" then
1600 if pname
== "output" then
1601 v
.add
("System.out.println({arguments[0]});")
1602 v
.ret
(v
.null_instance
)
1604 else if pname
== "object_id" then
1605 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1607 else if pname
== "+" then
1608 v
.ret
(v
.new_expr
("(byte)({arguments[0]} + {arguments[1]})", ret
.as(not null)))
1610 else if pname
== "-" then
1611 v
.ret
(v
.new_expr
("(byte)({arguments[0]} - {arguments[1]})", ret
.as(not null)))
1613 else if pname
== "unary -" then
1614 v
.ret
(v
.new_expr
("(byte)(-{arguments[0]})", ret
.as(not null)))
1616 else if pname
== "unary +" then
1619 else if pname
== "*" then
1620 v
.ret
(v
.new_expr
("(byte)({arguments[0]} * {arguments[1]})", ret
.as(not null)))
1622 else if pname
== "/" then
1623 v
.ret
(v
.new_expr
("(byte)({arguments[0]} / {arguments[1]})", ret
.as(not null)))
1625 else if pname
== "%" then
1626 v
.ret
(v
.new_expr
("(byte)({arguments[0]} % {arguments[1]})", ret
.as(not null)))
1628 else if pname
== "lshift" then
1629 v
.ret
(v
.new_expr
("(byte)({arguments[0]} << {arguments[1]})", ret
.as(not null)))
1631 else if pname
== "rshift" then
1632 v
.ret
(v
.new_expr
("(byte)({arguments[0]} >> {arguments[1]})", ret
.as(not null)))
1634 else if pname
== "==" then
1635 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1637 else if pname
== "!=" then
1638 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1639 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1641 else if pname
== "<" then
1642 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1644 else if pname
== ">" then
1645 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1647 else if pname
== "<=" then
1648 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1650 else if pname
== ">=" then
1651 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1653 else if pname
== "to_i" then
1654 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1656 else if pname
== "to_f" then
1657 v
.ret
(v
.new_expr
("(double){arguments[0]}", ret
.as(not null)))
1659 else if pname
== "ascii" then
1660 v
.ret
(v
.new_expr
("{arguments[0]}", ret
.as(not null)))
1663 else if cname
== "Bool" then
1664 if pname
== "output" then
1665 v
.add
("System.out.println({arguments[0]});")
1666 v
.ret
(v
.null_instance
)
1668 else if pname
== "object_id" then
1669 v
.ret
(v
.new_expr
("{arguments[0]}?1:0", ret
.as(not null)))
1671 else if pname
== "==" then
1672 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1674 else if pname
== "!=" then
1675 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1676 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1679 else if cname
== "Float" then
1680 if pname
== "output" then
1681 v
.add
"if({arguments[0]} == Double.POSITIVE_INFINITY) \{"
1682 v
.add
"System.out.println(\"inf\
");"
1683 v
.add
"\} else if({arguments[0]} == Double.POSITIVE_INFINITY) \{"
1684 v
.add
"System.out.println(\"-inf\
");"
1686 var df
= v
.get_name
("df")
1687 v
.add
"java.text.DecimalFormat {df} = new java.text.DecimalFormat(\"0.000000\
");"
1688 v
.add
"System.out.println({df}.format({arguments[0]}));"
1690 v
.ret
(v
.null_instance
)
1692 else if pname
== "object_id" then
1693 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1695 else if pname
== "+" then
1696 v
.ret
(v
.new_expr
("{arguments[0]} + {arguments[1]}", ret
.as(not null)))
1698 else if pname
== "-" then
1699 v
.ret
(v
.new_expr
("{arguments[0]} - {arguments[1]}", ret
.as(not null)))
1701 else if pname
== "unary -" then
1702 v
.ret
(v
.new_expr
("-{arguments[0]}", ret
.as(not null)))
1704 else if pname
== "unary +" then
1707 else if pname
== "succ" then
1708 v
.ret
(v
.new_expr
("{arguments[0]} + 1", ret
.as(not null)))
1710 else if pname
== "prec" then
1711 v
.ret
(v
.new_expr
("{arguments[0]} - 1", ret
.as(not null)))
1713 else if pname
== "*" then
1714 v
.ret
(v
.new_expr
("{arguments[0]} * {arguments[1]}", ret
.as(not null)))
1716 else if pname
== "/" then
1717 v
.ret
(v
.new_expr
("{arguments[0]} / {arguments[1]}", ret
.as(not null)))
1719 else if pname
== "==" then
1720 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1722 else if pname
== "!=" then
1723 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1724 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1726 else if pname
== "<" then
1727 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1729 else if pname
== ">" then
1730 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1732 else if pname
== "<=" then
1733 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1735 else if pname
== ">=" then
1736 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1738 else if pname
== "to_i" then
1739 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1741 else if pname
== "to_b" then
1742 v
.ret
(v
.new_expr
("(byte){arguments[0]}", ret
.as(not null)))
1746 if pname
== "exit" then
1747 v
.add
("System.exit({arguments[1]});")
1748 v
.ret
(v
.null_instance
)
1750 else if pname
== "sys" then
1752 var main_type
= v
.compiler
.mainmodule
.sys_type
.as(not null)
1753 var sys
= main_type
.mclass
1754 v
.ret
(v
.new_expr
("new RTVal({sys.rt_name}.get{sys.rt_name}())", main_type
))
1756 else if pname
== "object_id" then
1757 v
.ret
(v
.new_expr
("{arguments[0]}.hashCode()", ret
.as(not null)))
1759 else if pname
== "is_same_type" then
1760 v
.ret
(v
.is_same_type_test
(arguments
[0], arguments
[1]))
1762 else if pname
== "is_same_instance" then
1763 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1765 else if pname
== "output_class_name" then
1766 v
.add
("System.out.println({arguments[0]}.rtclass.class_name);")
1767 v
.ret
(v
.null_instance
)
1774 redef class AAttrPropdef
1775 redef fun compile_to_java
(v
, mpropdef
, arguments
) do
1776 v
.current_node
= self
1777 if mpropdef
== mreadpropdef
then
1778 compile_getter
(v
, mpropdef
, arguments
)
1779 else if mpropdef
== mwritepropdef
then
1780 compile_setter
(v
, mpropdef
, arguments
)
1784 v
.current_node
= null
1787 # Compile the setter method
1788 private fun compile_setter
(v
: JavaCompilerVisitor, mpropdef
: MPropDef, arguments
: Array[RuntimeVariable]) do
1789 var mtype
= v
.compiler
.mainmodule
.object_type
1790 var recv
= arguments
.first
1791 var val
= v
.new_expr
("args[1]", mtype
)
1792 v
.write_attribute
(self.mpropdef
.as(not null).mproperty
, recv
, val
)
1793 v
.ret v
.null_instance
1796 # Compile the getter method
1797 private fun compile_getter
(v
: JavaCompilerVisitor, mpropdef
: MPropDef, arguments
: Array[RuntimeVariable]) do
1798 var recv
= arguments
.first
1799 v
.ret v
.read_attribute
(self.mpropdef
.as(not null).mproperty
, recv
)
1802 private fun init_expr
(v
: JavaCompilerVisitor, recv
: RuntimeVariable) do
1803 if has_value
and not is_lazy
and not n_expr
isa ANullExpr then evaluate_expr
(v
, recv
)
1806 # Evaluate, store and return the default value of the attribute
1807 private fun evaluate_expr
(v
: JavaCompilerVisitor, recv
: RuntimeVariable): RuntimeVariable do
1809 var frame
= new JavaStaticFrame(v
, self.mreadpropdef
.as(not null), recv
.mcasttype
.undecorate
.as(MClassType), [recv
])
1813 var mtype
= self.mtype
1814 assert mtype
!= null
1816 var nexpr
= self.n_expr
1817 var nblock
= self.n_block
1818 if nexpr
!= null then
1819 value
= v
.expr
(nexpr
, mtype
)
1820 else if nblock
!= null then
1821 value
= v
.new_var
(mtype
)
1822 frame
.returnvar
= value
1823 frame
.returnlabel
= v
.get_name
("RET_LABEL")
1824 v
.add
("{frame.returnlabel.as(not null)}: \{")
1831 v
.write_attribute
(self.mpropdef
.as(not null).mproperty
, recv
, value
)
1838 # Try to compile self as an expression
1839 # Do not call this method directly, use `v.expr` instead
1840 private fun expr
(v
: JavaCompilerVisitor): nullable RuntimeVariable do
1841 v
.info
("NOT YET IMPLEMENTED {class_name}::expr")
1845 # Try to compile self as a statement
1846 # Do not call this method directly, use `v.stmt` instead
1847 private fun stmt
(v
: JavaCompilerVisitor) do expr
(v
)
1850 redef class ABlockExpr
1853 for e
in self.n_expr
do v
.stmt
(e
)
1857 var last
= self.n_expr
.last
1858 for e
in self.n_expr
do
1859 if e
== last
then break
1862 return v
.expr
(last
, null)
1866 redef class ASendExpr
1867 redef fun expr
(v
) do
1868 var recv
= v
.expr
(n_expr
, null)
1869 var callsite
= callsite
.as(not null)
1870 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, raw_arguments
)
1871 return v
.compile_callsite
(callsite
, args
)
1875 redef class ANewExpr
1878 var mtype
= self.recvtype
1879 assert mtype
!= null
1881 if mtype
.mclass
.name
== "NativeArray" then
1882 # TODO handle native arrays
1883 v
.info
("NOT YET IMPLEMENTED new NativeArray")
1886 var recv
= v
.init_instance
(mtype
)
1888 var callsite
= self.callsite
1889 if callsite
== null then return recv
1891 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
1892 var res2
= v
.compile_callsite
(callsite
, args
)
1893 if res2
!= null then
1900 redef class ASuperExpr
1904 assert frame
!= null
1905 var recv
= frame
.arguments
.first
1907 var callsite
= self.callsite
1908 if callsite
!= null then
1911 if self.n_args
.n_exprs
.is_empty
then
1912 # Add automatic arguments for the super init call
1914 for i
in [0..callsite
.msignature
.arity
[ do
1915 args
.add
(frame
.arguments
[i
+1])
1918 args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
1922 var res
= v
.compile_callsite
(callsite
, args
)
1926 var mpropdef
= self.mpropdef
.as(not null)
1929 if self.n_args
.n_exprs
.is_empty
then
1930 args
= frame
.arguments
1932 args
= v
.varargize
(mpropdef
, signaturemap
, recv
, self.n_args
.n_exprs
)
1935 # Standard call-next-method
1936 return v
.supercall
(mpropdef
, recv
.mtype
.as(MClassType), args
)
1940 redef class ASelfExpr
1941 redef fun expr
(v
) do return v
.frame
.as(not null).arguments
.first
1944 redef class AImplicitSelfExpr
1945 redef fun expr
(v
) do return v
.frame
.as(not null).arguments
.first
1948 redef class AAttrExpr
1949 redef fun expr
(v
) do
1950 var recv
= v
.expr
(self.n_expr
, null)
1951 var mproperty
= self.mproperty
.as(not null)
1952 return v
.read_attribute
(mproperty
, recv
)
1956 redef class AAttrAssignExpr
1957 redef fun expr
(v
) do
1958 var recv
= v
.expr
(self.n_expr
, null)
1959 var i
= v
.expr
(self.n_value
, null)
1960 var mproperty
= self.mproperty
.as(not null)
1961 v
.write_attribute
(mproperty
, recv
, i
)
1966 redef class AAttrReassignExpr
1967 redef fun stmt
(v
) do
1968 var recv
= v
.expr
(self.n_expr
, null)
1969 var value
= v
.expr
(self.n_value
, null)
1970 var mproperty
= self.mproperty
.as(not null)
1971 var attr
= v
.read_attribute
(mproperty
, recv
)
1972 var res
= v
.compile_callsite
(self.reassign_callsite
.as(not null), [attr
, value
])
1974 v
.write_attribute
(mproperty
, recv
, res
)
1978 redef class AIssetAttrExpr
1979 redef fun expr
(v
) do
1980 var recv
= v
.expr
(self.n_expr
, null)
1981 var mproperty
= self.mproperty
.as(not null)
1982 return v
.isset_attribute
(mproperty
, recv
)
1986 redef class AReturnExpr
1987 redef fun stmt
(v
) do
1988 var nexpr
= self.n_expr
1990 assert frame
!= null
1991 if nexpr
!= null then
1992 v
.ret
(v
.expr
(nexpr
, frame
.returnvar
.as(not null).mtype
))
1994 v
.ret
(v
.null_instance
)
2000 redef fun stmt
(v
) do
2001 var cond
= v
.expr_bool
(self.n_expr
)
2002 v
.add
("if ({cond})\{")
2009 redef fun expr
(v
) do
2010 var res
= v
.new_var
(self.mtype
.as(not null))
2011 var cond
= v
.expr_bool
(self.n_expr
)
2012 v
.add
("if ({cond})\{")
2013 v
.assign
(res
, v
.expr
(self.n_then
.as(not null), null))
2015 v
.assign
(res
, v
.expr
(self.n_else
.as(not null), null))
2024 v
.add_escape_label
(break_mark
)
2026 v
.stmt
(self.n_block
)
2031 redef class AWhileExpr
2034 v
.add_escape_label
(break_mark
)
2035 v
.add_escape_label
(continue_mark
)
2037 var cond
= v
.expr_bool
(self.n_expr
)
2038 v
.add
("if (!{cond}) break;")
2039 v
.stmt
(self.n_block
)
2044 redef class ALoopExpr
2047 v
.add_escape_label
(break_mark
)
2048 v
.add_escape_label
(continue_mark
)
2050 v
.stmt
(self.n_block
)
2055 redef class AEscapeExpr
2056 redef fun stmt
(v
) do v
.add
("break BREAK_{v.escapemark_name(escapemark)};")
2059 redef class AVardeclExpr
2060 redef fun stmt
(v
) do
2061 var variable
= self.variable
.as(not null)
2062 var ne
= self.n_expr
2063 var decl
= v
.variable
(variable
)
2065 var i
= v
.expr
(ne
, variable
.declared_type
)
2071 redef class AVarExpr
2072 redef fun expr
(v
) do
2073 return v
.variable
(self.variable
.as(not null))
2077 redef class AVarAssignExpr
2078 redef fun expr
(v
) do
2079 var variable
= self.variable
.as(not null)
2080 var i
= v
.expr
(self.n_value
, variable
.declared_type
)
2081 v
.assign
(v
.variable
(variable
), i
)
2087 redef class AAssertExpr
2088 redef fun stmt
(v
) do
2089 var cond
= v
.expr_bool
(self.n_expr
)
2090 v
.add
("if (!{cond}) \{")
2094 v
.add_abort
("Assert '{nid.text}' failed")
2096 v
.add_abort
("Assert failed")
2102 redef class AImpliesExpr
2103 redef fun expr
(v
) do
2104 var res
= v
.new_var
(mtype
.as(not null))
2105 var i1
= v
.expr_bool
(n_expr
)
2106 v
.add
("if (!{i1}) \{")
2107 v
.add
("{res} = true;")
2109 var i2
= v
.expr_bool
(n_expr2
)
2110 v
.add
("{res} = {i2};")
2116 redef class AOrElseExpr
2119 var res
= v
.new_var
(self.mtype
.as(not null))
2120 var i1
= v
.expr
(self.n_expr
, null)
2121 v
.add
("if ({i1} != null && !{i1}.is_null()) \{")
2124 var i2
= v
.expr
(self.n_expr2
, null)
2132 redef fun expr
(v
) do
2133 var res
= v
.new_var
(self.mtype
.as(not null))
2134 var i1
= v
.expr_bool
(self.n_expr
)
2135 v
.add
("if ({i1}) \{")
2136 v
.add
("{res} = true;")
2138 var i2
= v
.expr_bool
(self.n_expr2
)
2139 v
.add
("{res} = {i2};")
2145 redef class AAndExpr
2146 redef fun expr
(v
) do
2147 var res
= v
.new_var
(self.mtype
.as(not null))
2148 var i1
= v
.expr_bool
(self.n_expr
)
2149 v
.add
("if (!{i1}) \{")
2150 v
.add
("{res} = false;")
2152 var i2
= v
.expr_bool
(self.n_expr2
)
2153 v
.add
("{res} = {i2};")
2159 redef class ANotExpr
2160 redef fun expr
(v
) do
2161 var cond
= v
.expr_bool
(self.n_expr
)
2162 return v
.new_expr
("!{cond}", self.mtype
.as(not null))
2166 redef class AIntExpr
2167 redef fun expr
(v
) do return v
.int_instance
(self.value
.as(not null))
2170 redef class AByteExpr
2171 redef fun expr
(v
) do return v
.byte_instance
(self.value
.as(not null))
2174 redef class AFloatExpr
2175 redef fun expr
(v
) do return v
.float_instance
("{self.n_float.text}") # FIXME use value, not n_float
2178 redef class ACharExpr
2179 redef fun expr
(v
) do return v
.char_instance
(self.value
.as(not null))
2182 redef class ATrueExpr
2183 redef fun expr
(v
) do return v
.bool_instance
(true)
2186 redef class AFalseExpr
2187 redef fun expr
(v
) do return v
.bool_instance
(false)
2190 redef class ANullExpr
2191 redef fun expr
(v
) do return v
.null_instance
2194 redef class AAsCastExpr
2197 var i
= v
.expr
(n_expr
, null)
2198 v
.add_cast
(i
, mtype
.as(not null))
2203 redef class AAsNotnullExpr
2204 redef fun expr
(v
) do
2205 var i
= v
.expr
(n_expr
, null)
2206 if i
.mtype
.is_java_primitive
then return i
2208 v
.add
("if ({i} == null || {i}.is_null()) \{")
2209 v
.add_abort
("Cast failed")
2215 redef class AIsaExpr
2218 var i
= v
.expr
(self.n_expr
, null)
2219 var cast_type
= self.cast_type
2220 if cast_type
== null then return null # no-no on broken node
2221 return v
.type_test
(i
, cast_type
)
2225 redef class AParExpr
2226 redef fun expr
(v
) do return v
.expr
(self.n_expr
, null)
2229 redef class AAbortExpr
2230 redef fun stmt
(v
) do v
.add_abort
("Aborted")
2233 redef class ADebugTypeExpr
2234 redef fun stmt
(v
) do end # do nothing