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
330 # Registered variables
331 protected var variables
= new HashMap[Variable, RuntimeVariable]
333 # Return the local RuntimeVariable associated to a Nit local variable
334 fun variable
(variable
: Variable): RuntimeVariable do
335 if variables
.has_key
(variable
) then
336 return variables
[variable
]
338 var name
= get_name
("var_{variable.name}")
339 var mtype
= variable
.declared_type
.as(not null)
340 mtype
= anchor
(mtype
)
341 var res
= decl_var
(name
, mtype
)
342 variables
[variable
] = res
347 # Return a new uninitialized local RuntimeVariable with `name`
348 fun decl_var
(name
: String, mtype
: MType): RuntimeVariable do
349 var res
= new RuntimeVariable(name
, mtype
, mtype
)
350 res
.is_boxed
= not mtype
.is_java_primitive
351 add
("{mtype.java_type} {name} /* : {mtype} */;")
355 # Return a new uninitialized local RuntimeVariable
356 fun new_var
(mtype
: MType): RuntimeVariable do
357 mtype
= anchor
(mtype
)
358 var name
= self.get_name
("var")
359 return decl_var
(name
, mtype
)
364 # The current `JavaStaticFrame`
365 var frame
: nullable JavaStaticFrame = null is writable
367 # Return a new local RuntimeVariable initialized from `args[0]`
368 fun new_recv
(mtype
: MType): RuntimeVariable do
369 var res
= new_var
(mtype
)
370 add
("{res} = args[0];")
376 # Compile a call within a callsite
377 fun compile_callsite
(callsite
: CallSite, arguments
: Array[RuntimeVariable]): nullable RuntimeVariable do
378 var initializers
= callsite
.mpropdef
.initializers
379 if not initializers
.is_empty
then
380 var recv
= arguments
.first
383 for p
in initializers
do
384 if p
isa MMethod then
386 var msignature
= p
.intro
.msignature
387 if msignature
!= null then
388 for x
in msignature
.mparameters
do
389 args
.add arguments
[i
]
394 else if p
isa MAttribute then
395 info
("NOT YET IMPLEMENTED {class_name}::compile_callsite for MAttribute `{p}`")
396 #self.write_attribute(p, recv, arguments[i])
400 assert i
== arguments
.length
402 return send
(callsite
.mproperty
, [recv
])
405 return send
(callsite
.mproperty
, arguments
)
408 # Evaluate `args` as expressions in the call of `mpropdef` on `recv`.
410 # This method is used to manage varargs in signatures and returns the real array
411 # of runtime variables to use in the call.
412 fun varargize
(mpropdef
: MMethodDef, map
: nullable SignatureMap, recv
: RuntimeVariable, args
: SequenceRead[AExpr]): Array[RuntimeVariable] do
413 var msignature
= mpropdef
.new_msignature
or else mpropdef
.msignature
.as(not null)
414 var res
= new Array[RuntimeVariable]
417 if msignature
.arity
== 0 then return res
420 assert args
.length
== msignature
.arity
422 res
.add expr
(ne
, null)
427 # Eval in order of arguments, not parameters
428 var exprs
= new Array[RuntimeVariable].with_capacity
(args
.length
)
430 exprs
.add expr
(ne
, null)
433 # Fill `res` with the result of the evaluation according to the mapping
434 for i
in [0..msignature
.arity
[ do
435 var param
= msignature
.mparameters
[i
]
436 var j
= map
.map
.get_or_null
(i
)
439 res
.add
(null_instance
)
442 if param
.is_vararg
and map
.vararg_decl
> 0 then
443 var vararg
= exprs
.sub
(j
, map
.vararg_decl
)
444 var elttype
= param
.mtype
445 var arg
= self.vararg_instance
(mpropdef
, recv
, vararg
, elttype
)
454 # Generate a static call on a method definition (no receiver needed).
455 fun static_call
(mmethoddef
: MMethodDef, arguments
: Array[RuntimeVariable]): nullable RuntimeVariable do
456 var res
: nullable RuntimeVariable
457 var ret
= mmethoddef
.msignature
.as(not null).return_mtype
461 ret
= ret
.resolve_for
(mmethoddef
.mclassdef
.bound_mtype
, mmethoddef
.mclassdef
.bound_mtype
, mmethoddef
.mclassdef
.mmodule
, true)
462 res
= self.new_var
(ret
)
466 adapt_signature
(mmethoddef
, arguments
)
468 var rt_name
= mmethoddef
.rt_name
470 add
("{rt_name}.get{rt_name}().exec(new RTVal[]\{{arguments.join(",")}\});")
473 var ress
= new_expr
("{rt_name}.get{rt_name}().exec(new RTVal[]\{{arguments.join(",")}\});", compiler
.mainmodule
.object_type
)
478 # Generate a polymorphic send for `method` with `arguments`
479 fun send
(mmethod
: MMethod, arguments
: Array[RuntimeVariable]): nullable RuntimeVariable do
480 # Shortcut calls on primitives
481 if arguments
.first
.mcasttype
.is_java_primitive
then
482 return monomorphic_send
(mmethod
, arguments
.first
.mcasttype
, arguments
)
485 return table_send
(mmethod
, arguments
)
489 # Handle common special cases before doing the effective method invocation
490 # This methods handle the `==` and `!=` methods and the case of the null receiver.
491 # Note: a { is open in the generated C, that enclose and protect the effective method invocation.
492 # Client must not forget to close the } after them.
494 # The value returned is the result of the common special cases.
495 # If not null, client must compile it with the result of their own effective method invocation.
497 # If `before_send` can shortcut the whole message sending, a dummy `if(0){`
498 # is generated to cancel the effective method invocation that will follow
499 # TODO: find a better approach
500 private fun before_send
(res
: nullable RuntimeVariable, mmethod
: MMethodDef, arguments
: Array[RuntimeVariable]) do
501 var bool_type
= compiler
.mainmodule
.bool_type
502 var recv
= arguments
.first
503 var consider_null
= mmethod
.name
== "==" or mmethod
.name
== "!=" or mmethod
.name
== "is_same_instance"
504 if recv
.mcasttype
isa MNullableType or recv
.mcasttype
isa MNullType then
505 add
("if ({recv} == null || {recv}.is_null()) \{")
506 if mmethod
.name
== "==" or mmethod
.name
== "is_same_instance" then
507 if res
== null then res
= new_var
(bool_type
)
508 var arg
= arguments
[1]
509 if arg
.mcasttype
isa MNullableType then
510 add
("{res} = ({arg} == null || {arg}.is_null());")
511 else if arg
.mcasttype
isa MNullType then
512 add
("{res} = true; /* is null */")
514 add
("{res} = false; /* {arg.inspect} cannot be null */")
516 else if mmethod
.name
== "!=" then
517 if res
== null then res
= new_var
(bool_type
)
518 # res = self.new_var(bool_type)
519 var arg
= arguments
[1]
520 if arg
.mcasttype
isa MNullableType then
521 add
("{res} = ({arg} != null && !{arg}.is_null());")
522 else if arg
.mcasttype
isa MNullType then
523 add
("{res} = false; /* is null */")
525 add
("{res} = true; /* {arg.inspect} cannot be null */")
528 add_abort
("Receiver is null")
534 add
"/* recv ({recv}) cannot be null since it's a {recv.mcasttype}"
536 if consider_null
then
537 var arg
= arguments
[1]
538 if arg
.mcasttype
isa MNullType then
539 if res
== null then res
= new_var
(bool_type
)
540 if mmethod
.name
== "!=" then
541 add
("{res} = true; /* arg is null and recv is not */")
542 else # `==` and `is_same_instance`
543 add
("{res} = false; /* arg is null but recv is not */")
545 add
("\}") # closes the null case
546 add
("if (false) \{") # what follow is useless, Javac will drop it
551 # Perform a method call through vft
552 private fun table_send
(mmethod
: TableCallable, arguments
: Array[RuntimeVariable]): nullable RuntimeVariable do
555 if mmethod
isa MMethod then
557 name
= mmethod
.full_name
558 else if mmethod
isa MMethodDef then
560 name
= mmethod
.full_name
565 var recv
= arguments
.first
566 var rect
= mdef
.mclassdef
.bound_mtype
567 var msignature
= mdef
.msignature
.as(not null)
568 msignature
= msignature
.resolve_for
(rect
, rect
, compiler
.mainmodule
, true)
569 adapt_signature
(mdef
, arguments
)
571 var res
: nullable RuntimeVariable
572 var ret
= msignature
.return_mtype
576 res
= self.new_var
(ret
)
579 before_send
(res
, mdef
, arguments
)
581 add
"/* concrete call to {mdef} */"
583 var ress
= new_expr
("{recv}.rtclass.vft.get(\"{name}\
").exec(new RTVal[]\{{arguments.join(",")}\});", compiler
.mainmodule
.object_type
)
586 add
("{recv}.rtclass.vft.get(\"{name}\
").exec(new RTVal[]\{{arguments.join(",")}\});")
589 add
("\}") # closes the null case
594 # Generate a super call from a method definition
595 fun supercall
(m
: MMethodDef, recvtype
: MClassType, args
: Array[RuntimeVariable]): nullable RuntimeVariable do
596 return table_send
(m
, args
)
599 # Generate a monomorphic send for the method `m`, the type `t` and the arguments `args`
600 fun monomorphic_send
(m
: MMethod, t
: MType, args
: Array[RuntimeVariable]): nullable RuntimeVariable do
601 assert t
isa MClassType
602 var propdef
= m
.lookup_first_definition
(self.compiler
.mainmodule
, t
)
603 return self.static_call
(propdef
, args
)
608 # Add a line (will be suffixed by `\n`)
609 fun add
(line
: String) do file
.lines
.add
("{line}\n")
611 # Add a new partial line (no `\n` suffix)
612 fun addn
(line
: String) do file
.lines
.add
(line
)
614 # Compile a statement (if any)
615 fun stmt
(nexpr
: nullable AExpr) do
616 if nexpr
== null then return
617 var old
= self.current_node
623 # Compile an expression an return its result
624 # `mtype` is the expected return type, pass null if no specific type is expected.
625 fun expr
(nexpr
: AExpr, mtype
: nullable MType): RuntimeVariable do
626 var old
= current_node
630 if nexpr
.mtype
!= null then
631 res
= nexpr
.expr
(self)
634 if mtype
!= null then
635 mtype
= anchor
(mtype
)
636 res
= autobox
(res
, mtype
)
643 # Correctly assign a left and a right value
644 # Boxing and unboxing is performed if required
645 fun assign
(left
, right
: RuntimeVariable) do
646 add
("{left} = {autobox(right, left.mtype)};")
649 # Generate a return with `value`
650 fun ret
(value
: RuntimeVariable) do
651 var frame
= self.frame
653 var returnvar
= frame
.returnvar
654 if returnvar
!= null then
655 assign
(returnvar
, value
)
657 self.add
("break {frame.returnlabel.as(not null)};")
660 # Return a new local RuntimeVariable initialized with the Java expression `jexpr`.
662 # `mtype` is used for the Java return variable initialization.
663 fun new_expr
(jexpr
: String, mtype
: MType): RuntimeVariable do
664 var res
= new_var
(mtype
)
665 add
("{res} = {jexpr};")
669 # Generate generic abort
671 # Used by aborts, asserts, casts, etc.
672 fun add_abort
(message
: String) do
673 add
("System.err.print(\"Runtime error
: {message}\
");")
674 var node
= current_node
676 add
("System.err.print(\" ({node.location.short_location})\
");")
678 add
("System.err.println(\"\
");")
679 add
("System.exit(1);")
684 # Anchor a type to the main module and the current receiver
685 fun anchor
(mtype
: MType): MType do
686 if not mtype
.need_anchor
then return mtype
687 return mtype
.anchor_to
(compiler
.mainmodule
, frame
.as(not null).receiver
)
690 # Adapt the arguments of a method according to targetted `MMethodDef`
691 fun adapt_signature
(m
: MMethodDef, args
: Array[RuntimeVariable]) do
692 var msignature
= m
.msignature
.as(not null).resolve_for
(
693 m
.mclassdef
.bound_mtype
,
694 m
.mclassdef
.bound_mtype
,
695 m
.mclassdef
.mmodule
, true)
696 args
.first
= autobox
(args
.first
, compiler
.mainmodule
.object_type
)
697 for i
in [0..msignature
.arity
[ do
698 args
[i
+1] = autobox
(args
[i
+ 1], compiler
.mainmodule
.object_type
)
702 # Box primitive `value` to `mtype`.
703 private fun box
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
704 if value
.is_boxed
then return value
705 var obj_type
= compiler
.mainmodule
.object_type
706 if value
.mtype
isa MNullType then
707 return new_expr
("new RTVal(null, null)", compiler
.mainmodule
.model
.null_type
)
709 var mbox
= value
.mtype
.as(MClassType).mclass
710 return new_expr
("new RTVal({mbox.rt_name}.get{mbox.rt_name}(), {value})", obj_type
)
713 # Unbox primitive `value` to `mtype`.
714 private fun unbox
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
715 if not value
.is_boxed
then return value
716 if not mtype
.is_java_primitive
then return value
717 if compiler
.box_kinds
.has
(mtype
) then
718 return new_expr
("({mtype.java_type}){value}.value", mtype
)
720 info
"NOT YET IMPLEMENTED unbox for {value} ({mtype})"
725 # Box or unbox primitive `value` to `mtype` if needed.
726 private fun autobox
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
727 if mtype
.is_java_primitive
then return unbox
(value
, mtype
)
728 return box
(value
, mtype
)
731 # Can this `value` be a primitive Java value?
732 private fun can_be_primitive
(value
: RuntimeVariable): Bool do
733 var t
= value
.mcasttype
.undecorate
734 if not t
isa MClassType then return false
735 var k
= t
.mclass
.kind
736 return k
== interface_kind
or t
.is_java_primitive
741 # Generate an integer value
742 fun int_instance
(value
: Int): RuntimeVariable do
743 var t
= compiler
.mainmodule
.int_type
744 return new RuntimeVariable(value
.to_s
, t
, t
)
747 # Generate a byte value
748 fun byte_instance
(value
: Byte): RuntimeVariable do
749 var t
= compiler
.mainmodule
.byte_type
750 return new RuntimeVariable(value
.to_s
, t
, t
)
753 # Generate a char value
754 fun char_instance
(value
: Char): RuntimeVariable do
755 var t
= compiler
.mainmodule
.char_type
756 return new RuntimeVariable("'{value.to_s.escape_to_c}'", t
, t
)
759 # Generate a float value
761 # FIXME pass a Float, not a string
762 fun float_instance
(value
: String): RuntimeVariable do
763 var t
= compiler
.mainmodule
.float_type
764 return new RuntimeVariable(value
.to_s
, t
, t
)
767 # Generate an integer value
768 fun bool_instance
(value
: Bool): RuntimeVariable do
769 var t
= compiler
.mainmodule
.bool_type
770 return new RuntimeVariable(value
.to_s
, t
, t
)
773 # Generate the `null` value
774 fun null_instance
: RuntimeVariable do
775 var t
= compiler
.mainmodule
.model
.null_type
776 return new RuntimeVariable("null", t
, t
)
779 # Get an instance of a array for a vararg
780 fun vararg_instance
(mpropdef
: MPropDef, recv
: RuntimeVariable, varargs
: Array[RuntimeVariable], elttype
: MType): RuntimeVariable do
781 # TODO handle dynamic types
782 info
("NOT YET IMPLEMENTED vararg_instance")
784 # TODO return array_instance(varargs, elttype)
789 # Generate a alloc-instance + init-attributes
790 fun init_instance
(mtype
: MClassType): RuntimeVariable do
791 var rt_name
= mtype
.mclass
.rt_name
792 var res
= new_expr
("new RTVal({rt_name}.get{rt_name}())", mtype
)
793 generate_init_attr
(self, res
, mtype
)
797 # Generate code that initialize the attributes on a new instance
798 fun generate_init_attr
(v
: JavaCompilerVisitor, recv
: RuntimeVariable, mtype
: MClassType) do
799 var cds
= mtype
.collect_mclassdefs
(v
.compiler
.mainmodule
).to_a
800 v
.compiler
.mainmodule
.linearize_mclassdefs
(cds
)
802 for npropdef
in v
.compiler
.modelbuilder
.collect_attr_propdef
(cd
) do
803 npropdef
.init_expr
(v
, recv
)
808 # Generate a Nit "is" for two runtime_variables
809 fun equal_test
(value1
, value2
: RuntimeVariable): RuntimeVariable do
810 var res
= new_var
(compiler
.mainmodule
.bool_type
)
811 if value2
.mtype
.is_java_primitive
and not value1
.mtype
.is_java_primitive
then
816 if value1
.mtype
.is_java_primitive
then
817 if value2
.mtype
== value1
.mtype
then
818 add
("{res} = {value1} == {value2}; /* == with two primitives */")
819 else if value2
.mtype
.is_java_primitive
then
820 add
("{res} = true; /* incompatible types {value1.mtype} vs. {value2.mtype}*/")
821 # else if value1.mtype.is_tagged then
822 # add("{res} = ({value2} != NULL) && ({autobox(value2, value1.mtype)} == {value1});")
824 var rt_name
= value1
.mtype
.as(MClassType).mclass
.rt_name
825 add
("{res} = ({value2} != null) && ({value2}.rtclass == {rt_name}.get{rt_name}());")
827 add
("{res} = ({self.autobox(value2, value1.mtype)} == {value1});")
832 var maybe_null
= true
833 var test
= new Array[String]
834 var t1
= value1
.mcasttype
835 if t1
isa MNullableType then
836 test
.add
("{value1} != null && !{value1}.is_null()")
841 var t2
= value2
.mcasttype
842 if t2
isa MNullableType then
843 test
.add
("{value2} != null && !{value2}.is_null()")
849 var incompatible
= false
851 if t1
.is_java_primitive
then
854 # No need to compare class
855 else if t2
.is_java_primitive
then
857 else if can_be_primitive
(value2
) then
858 if t1
.is_java_primitive
then
859 self.add
("{res} = {value1} == {value2}; /* t1 is primitive and t2 can be */")
862 # if not compiler.modelbuilder.toolcontext.opt_no_tag_primitives.value then
863 # test.add("(!{extract_tag(value2)})")
865 test
.add
("{value1}.rtclass == {value2}.rtclass")
869 else if t2
.is_java_primitive
then
871 if can_be_primitive
(value1
) then
872 if t2
.is_java_primitive
then
873 self.add
("{res} = {value1} == {value2}; /* t2 is primitive and t1 can be */")
876 test
.add
("{value1}.rtclass == {value2}.rtclass")
886 self.add
("{res} = {value1} == {value2}; /* incompatible types {t1} vs. {t2}; but may be NULL*/")
889 self.add
("{res} = false; /* incompatible types {t1} vs. {t2}; cannot be NULL */")
893 if primitive
!= null then
894 if primitive
.is_java_primitive
then
895 self.add
("{res} = {value1} == {value2};")
898 test
.add
("({value1}.value == {value2}.value")
899 else if can_be_primitive
(value1
) and can_be_primitive
(value2
) then
900 test
.add
("{value1}.rtclass == {value2}.rtclass")
901 var s
= new Array[String]
902 for b
in compiler
.box_kinds
do
903 var rt_name
= b
.mclass
.rt_name
904 s
.add
"({value1}.rtclass == {rt_name}.get{rt_name}()) && ({value1}.value.equals({value2}.value))"
905 if b
.mclass
.name
== "Float" then
906 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)"
910 self.add
("{res} = {value1} == {value2}; /* both can be primitive */")
913 test
.add
("({s.join(" || ")})")
915 self.add
("{res} = {value1} == {value2}; /* no primitives */")
918 self.add
("{res} = {value1} == {value2} || ({test.join(" && ")});")
924 # Generate a polymorphic attribute is_set test
925 fun isset_attribute
(a
: MAttribute, recv
: RuntimeVariable): RuntimeVariable do
926 # TODO self.check_recv_notnull(recv)
927 var res
= new_var
(compiler
.mainmodule
.bool_type
)
929 # What is the declared type of the attribute?
930 var mtype
= a
.intro
.static_mtype
.as(not null)
931 var intromclassdef
= a
.intro
.mclassdef
932 mtype
= mtype
.resolve_for
(intromclassdef
.bound_mtype
, intromclassdef
.bound_mtype
, intromclassdef
.mmodule
, true)
934 if mtype
isa MNullableType then
935 add
("{res} = true; /* easy isset: {a} on {recv.inspect} */")
938 add
("{res} = {recv}.attrs.get(\"{a.jname}\
") != null; /* {a} on {recv.inspect} */")
942 # Generate a polymorphic attribute read
943 fun read_attribute
(a
: MAttribute, recv
: RuntimeVariable): RuntimeVariable do
944 # TODO check_recv_notnull(recv)
945 # TODO compile_check(v)
946 # What is the declared type of the attribute?
947 var ret
= a
.intro
.static_mtype
.as(not null)
948 var intromclassdef
= a
.intro
.mclassdef
949 ret
= ret
.resolve_for
(intromclassdef
.bound_mtype
, intromclassdef
.bound_mtype
, intromclassdef
.mmodule
, true)
951 # Check for Uninitialized attribute
952 if not ret
isa MNullableType then check_attribute
(a
, recv
)
954 return new_expr
("{recv}.attrs.get(\"{a.jname}\
")", ret
)
957 # Generate a polymorphic attribute write
958 fun write_attribute
(a
: MAttribute, recv
: RuntimeVariable, value
: RuntimeVariable) do
959 # TODO check_recv_notnull(recv)
960 add
"{recv}.attrs.put(\"{a.jname}\
", {autobox(value, compiler.mainmodule.object_type)});"
963 # Check uninitialized attribute
964 fun check_attribute
(a
: MAttribute, recv
: RuntimeVariable) do
965 add
"if({recv}.attrs.get(\"{a.jname}\
") == null) \{"
966 add_abort
"Uninitialized attribute {a.name}"
972 # Display a info message
973 fun info
(str
: String) do compiler
.modelbuilder
.toolcontext
.info
(str
, 0)
976 # A file containing Java code.
983 var lines
: List[String] = new List[String]
987 # A Java compatible name for `self`
988 private fun jname
: String do return name
.to_cmangle
991 # Handler for runtime classes generation
993 # We need 3 kinds of runtime structures:
994 # * `RTClass` to represent a global class
995 # * `RTMethod` to represent a method definition
996 # * `RTVal` to represent runtime variables
997 class JavaRuntimeModel
999 # Compile JavaRuntimeModel structures
1000 fun compile_rtmodel
(compiler
: JavaCompiler) do
1001 compile_rtclass
(compiler
)
1002 compile_rtmethod
(compiler
)
1003 compile_rtval
(compiler
)
1006 # Compile the abstract runtime class structure
1008 # Runtime classes have 3 attributes:
1009 # * `class_name`: the class name as a String
1010 # * `vft`: the virtual function table for the class (flattened)
1011 # * `supers`: the super type table (used for type tests)
1012 fun compile_rtclass
(compiler
: JavaCompiler) do
1013 var v
= compiler
.new_visitor
("RTClass.java")
1014 v
.add
("import java.util.HashMap;")
1015 v
.add
("public abstract class RTClass \{")
1016 v
.add
(" public String class_name;")
1017 v
.add
(" public HashMap<String, RTMethod> vft = new HashMap<>();")
1018 v
.add
(" public HashMap<String, RTClass> supers = new HashMap<>();")
1019 v
.add
(" protected RTClass() \{\}")
1023 # Compile the abstract runtime method structure
1025 # Method body is executed through the `exec` method:
1026 # * `exec` always take an array of RTVal as arg, the first one must be the receiver
1027 # * `exec` always returns a RTVal (or null if the Nit return type is void)
1028 fun compile_rtmethod
(compiler
: JavaCompiler) do
1029 var v
= compiler
.new_visitor
("RTMethod.java")
1030 v
.add
("public abstract class RTMethod \{")
1031 v
.add
(" protected RTMethod() \{\}")
1032 v
.add
(" public abstract RTVal exec(RTVal[] args);")
1036 # Compile the runtime value structure
1038 # RTVal both represents object instances and primitives values:
1039 # * object instances:
1040 # * `rtclass` the class of the RTVal is instance of
1041 # * `attrs` contains the attributes of the instance
1042 # * primitive values:
1043 # * `rtclass` represents the class of the primitive value Nit type
1044 # * `value` contains the primitive value of the instance
1046 # * they must have both `rtclass` and `value` as null
1047 fun compile_rtval
(compiler
: JavaCompiler) do
1048 var v
= compiler
.new_visitor
("RTVal.java")
1049 v
.add
("import java.util.HashMap;")
1050 v
.add
("public class RTVal \{")
1051 v
.add
(" public RTClass rtclass;")
1052 v
.add
(" public HashMap<String, RTVal> attrs = new HashMap<>();")
1053 v
.add
(" Object value;")
1054 v
.add
(" public RTVal(RTClass rtclass) \{")
1055 v
.add
(" this.rtclass = rtclass;")
1057 v
.add
(" public RTVal(RTClass rtclass, Object value) \{")
1058 v
.add
(" this.rtclass = rtclass;")
1059 v
.add
(" this.value = value;")
1061 v
.add
(" public boolean is_null() \{ return rtclass == null && value == null; \}")
1066 # A runtime variable hold a runtime value in Java.
1067 # Runtime variables are associated to Nit local variables and intermediate results in Nit expressions.
1068 class RuntimeVariable
1070 # The name of the variable in the Java code
1073 # The static type of the variable (as declard in Java)
1076 # The current casted type of the variable (as known in Nit)
1077 var mcasttype
: MType is writable
1079 # If the variable exaclty a mcasttype?
1080 # false (usual value) means that the variable is a mcasttype or a subtype.
1081 var is_exact
: Bool = false is writable
1083 # Is this variable declared as a RTVal or a Java primitive one?
1084 var is_boxed
= false
1086 redef fun to_s
do return name
1091 if self.is_exact
then
1092 exact_str
= " exact"
1097 if self.mtype
== self.mcasttype
then
1098 type_str
= "{mtype}{exact_str}"
1100 type_str
= "{mtype}({mcasttype}{exact_str})"
1102 return "<{name}:{type_str}>"
1106 # The static context of a visited property in a `JavaCompilerVisitor`
1107 class JavaStaticFrame
1108 # The associated visitor
1109 var visitor
: JavaCompilerVisitor
1111 # The executed property.
1112 # A Method in case of a call, an attribute in case of a default initialization.
1113 var mpropdef
: MPropDef
1115 # The static type of the receiver
1116 var receiver
: MClassType
1118 # Arguments of the method (the first is the receiver)
1119 var arguments
: Array[RuntimeVariable]
1121 # The runtime_variable associated to the return (in a function)
1122 var returnvar
: nullable RuntimeVariable = null is writable
1124 # The label at the end of the property
1125 var returnlabel
: nullable String = null is writable
1128 redef class Location
1129 # Return a shortened version of the location with `"{file}:{line_start}"`
1130 fun short_location
: String do
1131 var file
= self.file
1132 if file
== null then return "<no file>:{line_start}"
1133 return "{file.filename.escape_to_c}:{line_start}"
1138 # Return the Java type associated to a given Nit static type
1139 fun java_type
: String do return "RTVal"
1141 # Is the associated Java type a primitive one?
1143 # ENSURE `result == (java_type != "Object")`
1144 var is_java_primitive
: Bool is lazy
do return java_type
!= "RTVal"
1147 redef class MClassType
1149 redef var java_type
is lazy
do
1150 if mclass
.name
== "Int" then
1152 else if mclass
.name
== "Bool" then
1154 else if mclass
.name
== "Char" then
1156 else if mclass
.name
== "Float" then
1158 else if mclass
.name
== "Byte" then
1160 else if mclass
.name
== "NativeString" then
1162 else if mclass
.name
== "NativeArray" then
1172 private fun rt_name
: String do return "RTClass_{intro.mmodule.jname}_{jname}"
1174 # Generate a Java RTClass for a Nit MClass
1175 fun compile_to_java
(v
: JavaCompilerVisitor) do
1176 v
.add
("public class {rt_name} extends RTClass \{")
1177 v
.add
(" protected static RTClass instance;")
1178 v
.add
(" private {rt_name}() \{")
1179 v
.add
(" this.class_name = \"{name}\
";")
1181 compile_type_table
(v
)
1183 v
.add
(" public static RTClass get{rt_name}() \{")
1184 v
.add
(" if(instance == null) \{")
1185 v
.add
(" instance = new {rt_name}();")
1187 v
.add
(" return instance;")
1192 # Compile the virtual function table for the mclass
1193 private fun compile_vft
(v
: JavaCompilerVisitor) do
1194 # TODO handle generics
1195 if mclass_type
.need_anchor
then return
1196 var mclassdefs
= mclass_type
.collect_mclassdefs
(v
.compiler
.mainmodule
).to_a
1197 v
.compiler
.mainmodule
.linearize_mclassdefs
(mclassdefs
)
1199 var mainmodule
= v
.compiler
.mainmodule
1200 for mclassdef
in mclassdefs
.reversed
do
1201 for mprop
in mclassdef
.intro_mproperties
do
1202 var mpropdef
= mprop
.lookup_first_definition
(mainmodule
, intro
.bound_mtype
)
1203 if not mpropdef
isa MMethodDef then continue
1204 var rt_name
= mpropdef
.rt_name
1205 v
.add
("this.vft.put(\"{mprop.full_name}\
", {rt_name}.get{rt_name}());")
1207 # fill super next definitions
1208 while mpropdef
.has_supercall
do
1209 var prefix
= mpropdef
.full_name
1210 mpropdef
= mpropdef
.lookup_next_definition
(mainmodule
, intro
.bound_mtype
)
1211 rt_name
= mpropdef
.rt_name
1212 v
.add
("this.vft.put(\"{prefix}\
", {rt_name}.get{rt_name}());")
1218 # Compile the type table for the MClass
1219 fun compile_type_table
(v
: JavaCompilerVisitor) do
1220 for pclass
in in_hierarchy
(v
.compiler
.mainmodule
).greaters
do
1221 if pclass
== self then
1222 v
.add
("supers.put(\"{pclass.jname}\
", this);")
1224 v
.add
("supers.put(\"{pclass.jname}\
", {pclass.rt_name}.get{pclass.rt_name}());")
1230 # Used as a common type between MMethod and MMethodDef for `table_send`
1231 private interface TableCallable
1238 redef class MMethodDef
1242 private fun rt_name
: String do
1243 return "RTMethod_{mclassdef.mmodule.jname}_{mclassdef.mclass.jname}_{mproperty.jname}"
1246 # Generate a Java RTMethod for `self`
1247 fun compile_to_java
(v
: JavaCompilerVisitor) do
1248 v
.add
("public class {rt_name} extends RTMethod \{")
1249 v
.add
(" protected static RTMethod instance;")
1250 v
.add
(" public static RTMethod get{rt_name}() \{")
1251 v
.add
(" if(instance == null) \{")
1252 v
.add
(" instance = new {rt_name}();")
1254 v
.add
(" return instance;")
1257 v
.add
(" public RTVal exec(RTVal[] args) \{")
1258 compile_inside_to_java
(v
)
1263 # Compile the body of this function
1264 fun compile_inside_to_java
(v
: JavaCompilerVisitor) do
1266 var modelbuilder
= v
.compiler
.modelbuilder
1267 var node
= modelbuilder
.mpropdef2node
(self)
1270 v
.add_abort
("Abstract method `{mproperty.name}` called on `\" + {selfvar}.rtclass
.class_name
+\
"`")
1271 v
.add
("return null;")
1275 if node
isa APropdef then
1276 node
.compile_to_java
(v
, self)
1277 else if node
isa AClassdef then
1278 node
.compile_to_java
(v
, self)
1285 redef class AClassdef
1286 private fun compile_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef) do
1287 if mpropdef
== self.mfree_init
then
1288 var recv
= mpropdef
.mclassdef
.bound_mtype
1289 var arguments
= new Array[RuntimeVariable]
1290 var frame
= new JavaStaticFrame(v
, mpropdef
, recv
, arguments
)
1293 var selfvar
= v
.decl_var
("self", recv
)
1294 arguments
.add
(selfvar
)
1295 var boxed
= v
.new_expr
("args[0];", v
.compiler
.mainmodule
.object_type
)
1296 v
.add
"{selfvar} = {v.unbox(boxed, recv)};"
1298 var msignature
= mpropdef
.msignature
1300 if msignature
!= null then
1301 ret
= msignature
.return_mtype
1302 if ret
!= null then frame
.returnvar
= v
.new_var
(ret
)
1304 frame
.returnlabel
= v
.get_name
("RET_LABEL")
1306 assert mpropdef
.mproperty
.is_root_init
1307 if not mpropdef
.is_intro
then
1308 v
.supercall
(mpropdef
, arguments
.first
.mtype
.as(MClassType), arguments
)
1313 v
.add
("return null;")
1317 redef class APropdef
1319 # Compile that property definition to java code
1320 fun compile_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef) do
1321 v
.info
("NOT YET IMPLEMENTED {class_name}::compile_to_java")
1322 v
.add
("return null;")
1326 redef class AMethPropdef
1327 redef fun compile_to_java
(v
, mpropdef
) do
1328 var recv
= mpropdef
.mclassdef
.bound_mtype
1329 var arguments
= new Array[RuntimeVariable]
1330 var frame
= new JavaStaticFrame(v
, mpropdef
, recv
, arguments
)
1333 var selfvar
= v
.decl_var
("self", recv
)
1334 arguments
.add
(selfvar
)
1335 var boxed
= v
.new_expr
("args[0];", v
.compiler
.mainmodule
.object_type
)
1336 v
.add
"{selfvar} = {v.unbox(boxed, recv)};"
1338 var msignature
= mpropdef
.msignature
1340 if msignature
!= null then
1341 ret
= msignature
.return_mtype
1342 if ret
!= null then frame
.returnvar
= v
.new_var
(ret
)
1344 frame
.returnlabel
= v
.get_name
("RET_LABEL")
1346 if not mpropdef
.is_intern
and msignature
!= null then
1348 for mparam
in msignature
.mparameters
do
1349 var variable
= n_signature
.as(not null).n_params
[i
].variable
1350 if variable
== null then continue
1351 var argvar
= v
.variable
(variable
)
1352 boxed
= v
.new_expr
("args[{i + 1}];", v
.compiler
.mainmodule
.object_type
)
1353 v
.add
"{argvar} = {v.unbox(boxed, mparam.mtype)};"
1354 arguments
.add
(argvar
)
1359 v
.add
("{frame.returnlabel.as(not null)}: \{")
1361 # Call the implicit super-init
1362 var auto_super_inits
= self.auto_super_inits
1363 if auto_super_inits
!= null then
1364 var args
= [arguments
.first
]
1365 for auto_super_init
in auto_super_inits
do
1366 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
1368 for i
in [0..auto_super_init
.msignature
.arity
+1[ do
1369 args
.add
(arguments
[i
])
1371 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
1372 v
.compile_callsite
(auto_super_init
, args
)
1375 if auto_super_call
then
1376 v
.supercall
(mpropdef
, arguments
.first
.mtype
.as(MClassType), arguments
)
1379 compile_inside_to_java
(v
, mpropdef
)
1383 if ret
.is_java_primitive
then
1384 boxed
= v
.box
(frame
.returnvar
.as(not null), v
.compiler
.mainmodule
.object_type
)
1385 v
.add
("return {boxed};")
1387 v
.add
("return {frame.returnvar.as(not null)};")
1390 v
.add
("return null;")
1395 # Compile the inside of the method body
1396 private fun compile_inside_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef) do
1397 # Compile intern methods
1398 if mpropdef
.is_intern
then
1399 if compile_intern_to_java
(v
, mpropdef
, arguments
) then return
1400 v
.info
("NOT YET IMPLEMENTED compile_intern for {mpropdef}")
1401 v
.ret
(v
.null_instance
)
1405 # Compile block if any
1406 var n_block
= n_block
1407 if n_block
!= null then
1413 # Compile an intern method using Java primitives
1414 fun compile_intern_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef, arguments
: Array[RuntimeVariable]): Bool do
1415 var pname
= mpropdef
.mproperty
.name
1416 var cname
= mpropdef
.mclassdef
.mclass
.name
1417 var ret
= mpropdef
.msignature
.as(not null).return_mtype
1418 if cname
== "Int" then
1419 if pname
== "output" then
1420 v
.add
("System.out.println({arguments[0]});")
1421 v
.ret
(v
.null_instance
)
1423 else if pname
== "object_id" then
1424 v
.ret
(arguments
.first
)
1426 else if pname
== "+" then
1427 v
.ret
(v
.new_expr
("{arguments[0]} + {arguments[1]}", ret
.as(not null)))
1429 else if pname
== "-" then
1430 v
.ret
(v
.new_expr
("{arguments[0]} - {arguments[1]}", ret
.as(not null)))
1432 else if pname
== "unary -" then
1433 v
.ret
(v
.new_expr
("-{arguments[0]}", ret
.as(not null)))
1435 else if pname
== "unary +" then
1438 else if pname
== "*" then
1439 v
.ret
(v
.new_expr
("{arguments[0]} * {arguments[1]}", ret
.as(not null)))
1441 else if pname
== "/" then
1442 v
.ret
(v
.new_expr
("{arguments[0]} / {arguments[1]}", ret
.as(not null)))
1444 else if pname
== "%" then
1445 v
.ret
(v
.new_expr
("{arguments[0]} % {arguments[1]}", ret
.as(not null)))
1447 else if pname
== "lshift" then
1448 v
.ret
(v
.new_expr
("{arguments[0]} << {arguments[1]}", ret
.as(not null)))
1450 else if pname
== "rshift" then
1451 v
.ret
(v
.new_expr
("{arguments[0]} >> {arguments[1]}", ret
.as(not null)))
1453 else if pname
== "==" then
1454 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1456 else if pname
== "!=" then
1457 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1458 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1460 else if pname
== "<" then
1461 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1463 else if pname
== ">" then
1464 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1466 else if pname
== "<=" then
1467 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1469 else if pname
== ">=" then
1470 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1472 else if pname
== "to_f" then
1473 v
.ret
(v
.new_expr
("(double){arguments[0]}", ret
.as(not null)))
1475 else if pname
== "to_b" then
1476 v
.ret
(v
.new_expr
("(byte){arguments[0]}", ret
.as(not null)))
1478 else if pname
== "ascii" then
1479 v
.ret
(v
.new_expr
("(char){arguments[0]}", ret
.as(not null)))
1482 else if cname
== "Char" then
1483 if pname
== "output" then
1484 v
.add
("System.out.print({arguments[0]});")
1485 v
.ret
(v
.null_instance
)
1487 else if pname
== "object_id" then
1488 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1490 else if pname
== "successor" then
1491 v
.ret
(v
.new_expr
("(char)({arguments[0]} + {arguments[1]})", ret
.as(not null)))
1493 else if pname
== "predecessor" then
1494 v
.ret
(v
.new_expr
("(char)({arguments[0]} - {arguments[1]})", ret
.as(not null)))
1496 else if pname
== "==" then
1497 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1499 else if pname
== "!=" then
1500 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1501 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
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
== "<=" then
1510 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1512 else if pname
== ">=" then
1513 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1515 else if pname
== "to_i" then
1516 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1518 else if pname
== "ascii" then
1519 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1522 else if cname
== "Byte" then
1523 if pname
== "output" then
1524 v
.add
("System.out.println({arguments[0]});")
1525 v
.ret
(v
.null_instance
)
1527 else if pname
== "object_id" then
1528 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1530 else if pname
== "+" then
1531 v
.ret
(v
.new_expr
("(byte)({arguments[0]} + {arguments[1]})", ret
.as(not null)))
1533 else if pname
== "-" then
1534 v
.ret
(v
.new_expr
("(byte)({arguments[0]} - {arguments[1]})", ret
.as(not null)))
1536 else if pname
== "unary -" then
1537 v
.ret
(v
.new_expr
("(byte)(-{arguments[0]})", ret
.as(not null)))
1539 else if pname
== "unary +" then
1542 else if pname
== "*" then
1543 v
.ret
(v
.new_expr
("(byte)({arguments[0]} * {arguments[1]})", ret
.as(not null)))
1545 else if pname
== "/" then
1546 v
.ret
(v
.new_expr
("(byte)({arguments[0]} / {arguments[1]})", ret
.as(not null)))
1548 else if pname
== "%" then
1549 v
.ret
(v
.new_expr
("(byte)({arguments[0]} % {arguments[1]})", ret
.as(not null)))
1551 else if pname
== "lshift" then
1552 v
.ret
(v
.new_expr
("(byte)({arguments[0]} << {arguments[1]})", ret
.as(not null)))
1554 else if pname
== "rshift" then
1555 v
.ret
(v
.new_expr
("(byte)({arguments[0]} >> {arguments[1]})", ret
.as(not null)))
1557 else if pname
== "==" then
1558 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1560 else if pname
== "!=" then
1561 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1562 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1564 else if pname
== "<" then
1565 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1567 else if pname
== ">" then
1568 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1570 else if pname
== "<=" then
1571 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1573 else if pname
== ">=" then
1574 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1576 else if pname
== "to_i" then
1577 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1579 else if pname
== "to_f" then
1580 v
.ret
(v
.new_expr
("(double){arguments[0]}", ret
.as(not null)))
1582 else if pname
== "ascii" then
1583 v
.ret
(v
.new_expr
("{arguments[0]}", ret
.as(not null)))
1586 else if cname
== "Bool" then
1587 if pname
== "output" then
1588 v
.add
("System.out.println({arguments[0]});")
1589 v
.ret
(v
.null_instance
)
1591 else if pname
== "object_id" then
1592 v
.ret
(v
.new_expr
("{arguments[0]}?1:0", ret
.as(not null)))
1594 else if pname
== "==" then
1595 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1597 else if pname
== "!=" then
1598 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1599 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1602 else if cname
== "Float" then
1603 if pname
== "output" then
1604 v
.add
"if({arguments[0]} == Double.POSITIVE_INFINITY) \{"
1605 v
.add
"System.out.println(\"inf\
");"
1606 v
.add
"\} else if({arguments[0]} == Double.POSITIVE_INFINITY) \{"
1607 v
.add
"System.out.println(\"-inf\
");"
1609 var df
= v
.get_name
("df")
1610 v
.add
"java.text.DecimalFormat {df} = new java.text.DecimalFormat(\"0.000000\
");"
1611 v
.add
"System.out.println({df}.format({arguments[0]}));"
1613 v
.ret
(v
.null_instance
)
1615 else if pname
== "object_id" then
1616 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1618 else if pname
== "+" then
1619 v
.ret
(v
.new_expr
("{arguments[0]} + {arguments[1]}", ret
.as(not null)))
1621 else if pname
== "-" then
1622 v
.ret
(v
.new_expr
("{arguments[0]} - {arguments[1]}", ret
.as(not null)))
1624 else if pname
== "unary -" then
1625 v
.ret
(v
.new_expr
("-{arguments[0]}", ret
.as(not null)))
1627 else if pname
== "unary +" then
1630 else if pname
== "succ" then
1631 v
.ret
(v
.new_expr
("{arguments[0]} + 1", ret
.as(not null)))
1633 else if pname
== "prec" then
1634 v
.ret
(v
.new_expr
("{arguments[0]} - 1", ret
.as(not null)))
1636 else if pname
== "*" then
1637 v
.ret
(v
.new_expr
("{arguments[0]} * {arguments[1]}", ret
.as(not null)))
1639 else if pname
== "/" then
1640 v
.ret
(v
.new_expr
("{arguments[0]} / {arguments[1]}", ret
.as(not null)))
1642 else if pname
== "==" then
1643 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1645 else if pname
== "!=" then
1646 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1647 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1649 else if pname
== "<" then
1650 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1652 else if pname
== ">" then
1653 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1655 else if pname
== "<=" then
1656 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1658 else if pname
== ">=" then
1659 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1661 else if pname
== "to_i" then
1662 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1664 else if pname
== "to_b" then
1665 v
.ret
(v
.new_expr
("(byte){arguments[0]}", ret
.as(not null)))
1669 if pname
== "exit" then
1670 v
.add
("System.exit({arguments[1]});")
1671 v
.ret
(v
.null_instance
)
1673 else if pname
== "sys" then
1675 var main_type
= v
.compiler
.mainmodule
.sys_type
.as(not null)
1676 var sys
= main_type
.mclass
1677 v
.ret
(v
.new_expr
("new RTVal({sys.rt_name}.get{sys.rt_name}())", main_type
))
1679 else if pname
== "object_id" then
1680 v
.ret
(v
.new_expr
("{arguments[0]}.hashCode()", ret
.as(not null)))
1682 else if pname
== "is_same_type" then
1683 v
.ret
(v
.is_same_type_test
(arguments
[0], arguments
[1]))
1685 else if pname
== "is_same_instance" then
1686 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1688 else if pname
== "output_class_name" then
1689 v
.add
("System.out.println({arguments[0]}.rtclass.class_name);")
1690 v
.ret
(v
.null_instance
)
1697 redef class AAttrPropdef
1698 redef fun compile_to_java
(v
, mpropdef
, arguments
) do
1699 v
.current_node
= self
1700 if mpropdef
== mreadpropdef
then
1701 compile_getter
(v
, mpropdef
, arguments
)
1702 else if mpropdef
== mwritepropdef
then
1703 compile_setter
(v
, mpropdef
, arguments
)
1707 v
.current_node
= null
1710 # Compile the setter method
1711 private fun compile_setter
(v
: JavaCompilerVisitor, mpropdef
: MPropDef, arguments
: Array[RuntimeVariable]) do
1712 var mtype
= v
.compiler
.mainmodule
.object_type
1713 var recv
= arguments
.first
1714 var val
= v
.new_expr
("args[1]", mtype
)
1715 v
.write_attribute
(self.mpropdef
.as(not null).mproperty
, recv
, val
)
1716 v
.ret v
.null_instance
1719 # Compile the getter method
1720 private fun compile_getter
(v
: JavaCompilerVisitor, mpropdef
: MPropDef, arguments
: Array[RuntimeVariable]) do
1721 var recv
= arguments
.first
1722 v
.ret v
.read_attribute
(self.mpropdef
.as(not null).mproperty
, recv
)
1725 private fun init_expr
(v
: JavaCompilerVisitor, recv
: RuntimeVariable) do
1726 if has_value
and not is_lazy
and not n_expr
isa ANullExpr then evaluate_expr
(v
, recv
)
1729 # Evaluate, store and return the default value of the attribute
1730 private fun evaluate_expr
(v
: JavaCompilerVisitor, recv
: RuntimeVariable): RuntimeVariable do
1732 var frame
= new JavaStaticFrame(v
, self.mreadpropdef
.as(not null), recv
.mcasttype
.undecorate
.as(MClassType), [recv
])
1736 var mtype
= self.mtype
1737 assert mtype
!= null
1739 var nexpr
= self.n_expr
1740 var nblock
= self.n_block
1741 if nexpr
!= null then
1742 value
= v
.expr
(nexpr
, mtype
)
1743 else if nblock
!= null then
1744 value
= v
.new_var
(mtype
)
1745 frame
.returnvar
= value
1746 frame
.returnlabel
= v
.get_name
("RET_LABEL")
1747 v
.add
("{frame.returnlabel.as(not null)}: \{")
1754 v
.write_attribute
(self.mpropdef
.as(not null).mproperty
, recv
, value
)
1761 # Try to compile self as an expression
1762 # Do not call this method directly, use `v.expr` instead
1763 private fun expr
(v
: JavaCompilerVisitor): nullable RuntimeVariable do
1764 v
.info
("NOT YET IMPLEMENTED {class_name}::expr")
1768 # Try to compile self as a statement
1769 # Do not call this method directly, use `v.stmt` instead
1770 private fun stmt
(v
: JavaCompilerVisitor) do expr
(v
)
1773 redef class ABlockExpr
1776 for e
in self.n_expr
do v
.stmt
(e
)
1780 var last
= self.n_expr
.last
1781 for e
in self.n_expr
do
1782 if e
== last
then break
1785 return v
.expr
(last
, null)
1789 redef class ASendExpr
1790 redef fun expr
(v
) do
1791 var recv
= v
.expr
(n_expr
, null)
1792 var callsite
= callsite
.as(not null)
1793 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, raw_arguments
)
1794 return v
.compile_callsite
(callsite
, args
)
1798 redef class ANewExpr
1801 var mtype
= self.recvtype
1802 assert mtype
!= null
1804 if mtype
.mclass
.name
== "NativeArray" then
1805 # TODO handle native arrays
1806 v
.info
("NOT YET IMPLEMENTED new NativeArray")
1809 var recv
= v
.init_instance
(mtype
)
1811 var callsite
= self.callsite
1812 if callsite
== null then return recv
1814 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
1815 var res2
= v
.compile_callsite
(callsite
, args
)
1816 if res2
!= null then
1823 redef class ASuperExpr
1827 assert frame
!= null
1828 var recv
= frame
.arguments
.first
1830 var callsite
= self.callsite
1831 if callsite
!= null then
1834 if self.n_args
.n_exprs
.is_empty
then
1835 # Add automatic arguments for the super init call
1837 for i
in [0..callsite
.msignature
.arity
[ do
1838 args
.add
(frame
.arguments
[i
+1])
1841 args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
1845 var res
= v
.compile_callsite
(callsite
, args
)
1849 var mpropdef
= self.mpropdef
.as(not null)
1852 if self.n_args
.n_exprs
.is_empty
then
1853 args
= frame
.arguments
1855 args
= v
.varargize
(mpropdef
, signaturemap
, recv
, self.n_args
.n_exprs
)
1858 # Standard call-next-method
1859 return v
.supercall
(mpropdef
, recv
.mtype
.as(MClassType), args
)
1863 redef class ASelfExpr
1864 redef fun expr
(v
) do return v
.frame
.as(not null).arguments
.first
1867 redef class AImplicitSelfExpr
1868 redef fun expr
(v
) do return v
.frame
.as(not null).arguments
.first
1871 redef class AAttrExpr
1872 redef fun expr
(v
) do
1873 var recv
= v
.expr
(self.n_expr
, null)
1874 var mproperty
= self.mproperty
.as(not null)
1875 return v
.read_attribute
(mproperty
, recv
)
1879 redef class AAttrAssignExpr
1880 redef fun expr
(v
) do
1881 var recv
= v
.expr
(self.n_expr
, null)
1882 var i
= v
.expr
(self.n_value
, null)
1883 var mproperty
= self.mproperty
.as(not null)
1884 v
.write_attribute
(mproperty
, recv
, i
)
1889 redef class AAttrReassignExpr
1890 redef fun stmt
(v
) do
1891 var recv
= v
.expr
(self.n_expr
, null)
1892 var value
= v
.expr
(self.n_value
, null)
1893 var mproperty
= self.mproperty
.as(not null)
1894 var attr
= v
.read_attribute
(mproperty
, recv
)
1895 var res
= v
.compile_callsite
(self.reassign_callsite
.as(not null), [attr
, value
])
1897 v
.write_attribute
(mproperty
, recv
, res
)
1901 redef class AIssetAttrExpr
1902 redef fun expr
(v
) do
1903 var recv
= v
.expr
(self.n_expr
, null)
1904 var mproperty
= self.mproperty
.as(not null)
1905 return v
.isset_attribute
(mproperty
, recv
)
1909 redef class AReturnExpr
1910 redef fun stmt
(v
) do
1911 var nexpr
= self.n_expr
1913 assert frame
!= null
1914 if nexpr
!= null then
1915 v
.ret
(v
.expr
(nexpr
, frame
.returnvar
.as(not null).mtype
))
1917 v
.ret
(v
.null_instance
)
1922 redef class AVardeclExpr
1923 redef fun stmt
(v
) do
1924 var variable
= self.variable
.as(not null)
1925 var ne
= self.n_expr
1926 var decl
= v
.variable
(variable
)
1928 var i
= v
.expr
(ne
, variable
.declared_type
)
1934 redef class AVarExpr
1935 redef fun expr
(v
) do
1936 return v
.variable
(self.variable
.as(not null))
1940 redef class AVarAssignExpr
1941 redef fun expr
(v
) do
1942 var variable
= self.variable
.as(not null)
1943 var i
= v
.expr
(self.n_value
, variable
.declared_type
)
1944 v
.assign
(v
.variable
(variable
), i
)
1949 redef class AIntExpr
1950 redef fun expr
(v
) do return v
.int_instance
(self.value
.as(not null))
1953 redef class AByteExpr
1954 redef fun expr
(v
) do return v
.byte_instance
(self.value
.as(not null))
1957 redef class AFloatExpr
1958 redef fun expr
(v
) do return v
.float_instance
("{self.n_float.text}") # FIXME use value, not n_float
1961 redef class ACharExpr
1962 redef fun expr
(v
) do return v
.char_instance
(self.value
.as(not null))
1965 redef class ATrueExpr
1966 redef fun expr
(v
) do return v
.bool_instance
(true)
1969 redef class AFalseExpr
1970 redef fun expr
(v
) do return v
.bool_instance
(false)
1973 redef class ANullExpr
1974 redef fun expr
(v
) do return v
.null_instance
1977 redef class AParExpr
1978 redef fun expr
(v
) do return v
.expr
(self.n_expr
, null)
1981 redef class AAbortExpr
1982 redef fun stmt
(v
) do v
.add_abort
("Aborted")
1985 redef class ADebugTypeExpr
1986 redef fun stmt
(v
) do end # do nothing