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 # Alias for `self.expr(nexpr, self.bool_type)`
644 fun expr_bool
(nexpr
: AExpr): RuntimeVariable do
645 return expr
(nexpr
, compiler
.mainmodule
.bool_type
)
648 # Correctly assign a left and a right value
649 # Boxing and unboxing is performed if required
650 fun assign
(left
, right
: RuntimeVariable) do
651 add
("{left} = {autobox(right, left.mtype)};")
654 # Generate a return with `value`
655 fun ret
(value
: RuntimeVariable) do
656 var frame
= self.frame
658 var returnvar
= frame
.returnvar
659 if returnvar
!= null then
660 assign
(returnvar
, value
)
662 self.add
("break {frame.returnlabel.as(not null)};")
665 # Return a new local RuntimeVariable initialized with the Java expression `jexpr`.
667 # `mtype` is used for the Java return variable initialization.
668 fun new_expr
(jexpr
: String, mtype
: MType): RuntimeVariable do
669 var res
= new_var
(mtype
)
670 add
("{res} = {jexpr};")
674 # Generate generic abort
676 # Used by aborts, asserts, casts, etc.
677 fun add_abort
(message
: String) do
678 add
("System.err.print(\"Runtime error
: {message}\
");")
679 var node
= current_node
681 add
("System.err.print(\" ({node.location.short_location})\
");")
683 add
("System.err.println(\"\
");")
684 add
("System.exit(1);")
689 # Anchor a type to the main module and the current receiver
690 fun anchor
(mtype
: MType): MType do
691 if not mtype
.need_anchor
then return mtype
692 return mtype
.anchor_to
(compiler
.mainmodule
, frame
.as(not null).receiver
)
695 # Adapt the arguments of a method according to targetted `MMethodDef`
696 fun adapt_signature
(m
: MMethodDef, args
: Array[RuntimeVariable]) do
697 var msignature
= m
.msignature
.as(not null).resolve_for
(
698 m
.mclassdef
.bound_mtype
,
699 m
.mclassdef
.bound_mtype
,
700 m
.mclassdef
.mmodule
, true)
701 args
.first
= autobox
(args
.first
, compiler
.mainmodule
.object_type
)
702 for i
in [0..msignature
.arity
[ do
703 args
[i
+1] = autobox
(args
[i
+ 1], compiler
.mainmodule
.object_type
)
707 # Box primitive `value` to `mtype`.
708 private fun box
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
709 if value
.is_boxed
then return value
710 var obj_type
= compiler
.mainmodule
.object_type
711 if value
.mtype
isa MNullType then
712 return new_expr
("new RTVal(null, null)", compiler
.mainmodule
.model
.null_type
)
714 var mbox
= value
.mtype
.as(MClassType).mclass
715 return new_expr
("new RTVal({mbox.rt_name}.get{mbox.rt_name}(), {value})", obj_type
)
718 # Unbox primitive `value` to `mtype`.
719 private fun unbox
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
720 if not value
.is_boxed
then return value
721 if not mtype
.is_java_primitive
then return value
722 if compiler
.box_kinds
.has
(mtype
) then
723 return new_expr
("({mtype.java_type}){value}.value", mtype
)
725 info
"NOT YET IMPLEMENTED unbox for {value} ({mtype})"
730 # Box or unbox primitive `value` to `mtype` if needed.
731 private fun autobox
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
732 if mtype
.is_java_primitive
then return unbox
(value
, mtype
)
733 return box
(value
, mtype
)
736 # Can this `value` be a primitive Java value?
737 private fun can_be_primitive
(value
: RuntimeVariable): Bool do
738 var t
= value
.mcasttype
.undecorate
739 if not t
isa MClassType then return false
740 var k
= t
.mclass
.kind
741 return k
== interface_kind
or t
.is_java_primitive
746 # Generate an integer value
747 fun int_instance
(value
: Int): RuntimeVariable do
748 var t
= compiler
.mainmodule
.int_type
749 return new RuntimeVariable(value
.to_s
, t
, t
)
752 # Generate a byte value
753 fun byte_instance
(value
: Byte): RuntimeVariable do
754 var t
= compiler
.mainmodule
.byte_type
755 return new RuntimeVariable(value
.to_s
, t
, t
)
758 # Generate a char value
759 fun char_instance
(value
: Char): RuntimeVariable do
760 var t
= compiler
.mainmodule
.char_type
761 return new RuntimeVariable("'{value.to_s.escape_to_c}'", t
, t
)
764 # Generate a float value
766 # FIXME pass a Float, not a string
767 fun float_instance
(value
: String): RuntimeVariable do
768 var t
= compiler
.mainmodule
.float_type
769 return new RuntimeVariable(value
.to_s
, t
, t
)
772 # Generate an integer value
773 fun bool_instance
(value
: Bool): RuntimeVariable do
774 var t
= compiler
.mainmodule
.bool_type
775 return new RuntimeVariable(value
.to_s
, t
, t
)
778 # Generate the `null` value
779 fun null_instance
: RuntimeVariable do
780 var t
= compiler
.mainmodule
.model
.null_type
781 return new RuntimeVariable("null", t
, t
)
784 # Get an instance of a array for a vararg
785 fun vararg_instance
(mpropdef
: MPropDef, recv
: RuntimeVariable, varargs
: Array[RuntimeVariable], elttype
: MType): RuntimeVariable do
786 # TODO handle dynamic types
787 info
("NOT YET IMPLEMENTED vararg_instance")
789 # TODO return array_instance(varargs, elttype)
794 # Generate a alloc-instance + init-attributes
795 fun init_instance
(mtype
: MClassType): RuntimeVariable do
796 var rt_name
= mtype
.mclass
.rt_name
797 var res
= new_expr
("new RTVal({rt_name}.get{rt_name}())", mtype
)
798 generate_init_attr
(self, res
, mtype
)
802 # Generate code that initialize the attributes on a new instance
803 fun generate_init_attr
(v
: JavaCompilerVisitor, recv
: RuntimeVariable, mtype
: MClassType) do
804 var cds
= mtype
.collect_mclassdefs
(v
.compiler
.mainmodule
).to_a
805 v
.compiler
.mainmodule
.linearize_mclassdefs
(cds
)
807 for npropdef
in v
.compiler
.modelbuilder
.collect_attr_propdef
(cd
) do
808 npropdef
.init_expr
(v
, recv
)
813 # Generate a Nit "is" for two runtime_variables
814 fun equal_test
(value1
, value2
: RuntimeVariable): RuntimeVariable do
815 var res
= new_var
(compiler
.mainmodule
.bool_type
)
816 if value2
.mtype
.is_java_primitive
and not value1
.mtype
.is_java_primitive
then
821 if value1
.mtype
.is_java_primitive
then
822 if value2
.mtype
== value1
.mtype
then
823 add
("{res} = {value1} == {value2}; /* == with two primitives */")
824 else if value2
.mtype
.is_java_primitive
then
825 add
("{res} = true; /* incompatible types {value1.mtype} vs. {value2.mtype}*/")
826 # else if value1.mtype.is_tagged then
827 # add("{res} = ({value2} != NULL) && ({autobox(value2, value1.mtype)} == {value1});")
829 var rt_name
= value1
.mtype
.as(MClassType).mclass
.rt_name
830 add
("{res} = ({value2} != null) && ({value2}.rtclass == {rt_name}.get{rt_name}());")
832 add
("{res} = ({self.autobox(value2, value1.mtype)} == {value1});")
837 var maybe_null
= true
838 var test
= new Array[String]
839 var t1
= value1
.mcasttype
840 if t1
isa MNullableType then
841 test
.add
("{value1} != null && !{value1}.is_null()")
846 var t2
= value2
.mcasttype
847 if t2
isa MNullableType then
848 test
.add
("{value2} != null && !{value2}.is_null()")
854 var incompatible
= false
856 if t1
.is_java_primitive
then
859 # No need to compare class
860 else if t2
.is_java_primitive
then
862 else if can_be_primitive
(value2
) then
863 if t1
.is_java_primitive
then
864 self.add
("{res} = {value1} == {value2}; /* t1 is primitive and t2 can be */")
867 # if not compiler.modelbuilder.toolcontext.opt_no_tag_primitives.value then
868 # test.add("(!{extract_tag(value2)})")
870 test
.add
("{value1}.rtclass == {value2}.rtclass")
874 else if t2
.is_java_primitive
then
876 if can_be_primitive
(value1
) then
877 if t2
.is_java_primitive
then
878 self.add
("{res} = {value1} == {value2}; /* t2 is primitive and t1 can be */")
881 test
.add
("{value1}.rtclass == {value2}.rtclass")
891 self.add
("{res} = {value1} == {value2}; /* incompatible types {t1} vs. {t2}; but may be NULL*/")
894 self.add
("{res} = false; /* incompatible types {t1} vs. {t2}; cannot be NULL */")
898 if primitive
!= null then
899 if primitive
.is_java_primitive
then
900 self.add
("{res} = {value1} == {value2};")
903 test
.add
("({value1}.value == {value2}.value")
904 else if can_be_primitive
(value1
) and can_be_primitive
(value2
) then
905 test
.add
("{value1}.rtclass == {value2}.rtclass")
906 var s
= new Array[String]
907 for b
in compiler
.box_kinds
do
908 var rt_name
= b
.mclass
.rt_name
909 s
.add
"({value1}.rtclass == {rt_name}.get{rt_name}()) && ({value1}.value.equals({value2}.value))"
910 if b
.mclass
.name
== "Float" then
911 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)"
915 self.add
("{res} = {value1} == {value2}; /* both can be primitive */")
918 test
.add
("({s.join(" || ")})")
920 self.add
("{res} = {value1} == {value2}; /* no primitives */")
923 self.add
("{res} = {value1} == {value2} || ({test.join(" && ")});")
929 # Generate a polymorphic attribute is_set test
930 fun isset_attribute
(a
: MAttribute, recv
: RuntimeVariable): RuntimeVariable do
931 # TODO self.check_recv_notnull(recv)
932 var res
= new_var
(compiler
.mainmodule
.bool_type
)
934 # What is the declared type of the attribute?
935 var mtype
= a
.intro
.static_mtype
.as(not null)
936 var intromclassdef
= a
.intro
.mclassdef
937 mtype
= mtype
.resolve_for
(intromclassdef
.bound_mtype
, intromclassdef
.bound_mtype
, intromclassdef
.mmodule
, true)
939 if mtype
isa MNullableType then
940 add
("{res} = true; /* easy isset: {a} on {recv.inspect} */")
943 add
("{res} = {recv}.attrs.get(\"{a.jname}\
") != null; /* {a} on {recv.inspect} */")
947 # Generate a polymorphic attribute read
948 fun read_attribute
(a
: MAttribute, recv
: RuntimeVariable): RuntimeVariable do
949 # TODO check_recv_notnull(recv)
950 # TODO compile_check(v)
951 # What is the declared type of the attribute?
952 var ret
= a
.intro
.static_mtype
.as(not null)
953 var intromclassdef
= a
.intro
.mclassdef
954 ret
= ret
.resolve_for
(intromclassdef
.bound_mtype
, intromclassdef
.bound_mtype
, intromclassdef
.mmodule
, true)
956 # Check for Uninitialized attribute
957 if not ret
isa MNullableType then check_attribute
(a
, recv
)
959 return new_expr
("{recv}.attrs.get(\"{a.jname}\
")", ret
)
962 # Generate a polymorphic attribute write
963 fun write_attribute
(a
: MAttribute, recv
: RuntimeVariable, value
: RuntimeVariable) do
964 # TODO check_recv_notnull(recv)
965 add
"{recv}.attrs.put(\"{a.jname}\
", {autobox(value, compiler.mainmodule.object_type)});"
968 # Check uninitialized attribute
969 fun check_attribute
(a
: MAttribute, recv
: RuntimeVariable) do
970 add
"if({recv}.attrs.get(\"{a.jname}\
") == null) \{"
971 add_abort
"Uninitialized attribute {a.name}"
977 # Display a info message
978 fun info
(str
: String) do compiler
.modelbuilder
.toolcontext
.info
(str
, 0)
981 # A file containing Java code.
988 var lines
: List[String] = new List[String]
992 # A Java compatible name for `self`
993 private fun jname
: String do return name
.to_cmangle
996 # Handler for runtime classes generation
998 # We need 3 kinds of runtime structures:
999 # * `RTClass` to represent a global class
1000 # * `RTMethod` to represent a method definition
1001 # * `RTVal` to represent runtime variables
1002 class JavaRuntimeModel
1004 # Compile JavaRuntimeModel structures
1005 fun compile_rtmodel
(compiler
: JavaCompiler) do
1006 compile_rtclass
(compiler
)
1007 compile_rtmethod
(compiler
)
1008 compile_rtval
(compiler
)
1011 # Compile the abstract runtime class structure
1013 # Runtime classes have 3 attributes:
1014 # * `class_name`: the class name as a String
1015 # * `vft`: the virtual function table for the class (flattened)
1016 # * `supers`: the super type table (used for type tests)
1017 fun compile_rtclass
(compiler
: JavaCompiler) do
1018 var v
= compiler
.new_visitor
("RTClass.java")
1019 v
.add
("import java.util.HashMap;")
1020 v
.add
("public abstract class RTClass \{")
1021 v
.add
(" public String class_name;")
1022 v
.add
(" public HashMap<String, RTMethod> vft = new HashMap<>();")
1023 v
.add
(" public HashMap<String, RTClass> supers = new HashMap<>();")
1024 v
.add
(" protected RTClass() \{\}")
1028 # Compile the abstract runtime method structure
1030 # Method body is executed through the `exec` method:
1031 # * `exec` always take an array of RTVal as arg, the first one must be the receiver
1032 # * `exec` always returns a RTVal (or null if the Nit return type is void)
1033 fun compile_rtmethod
(compiler
: JavaCompiler) do
1034 var v
= compiler
.new_visitor
("RTMethod.java")
1035 v
.add
("public abstract class RTMethod \{")
1036 v
.add
(" protected RTMethod() \{\}")
1037 v
.add
(" public abstract RTVal exec(RTVal[] args);")
1041 # Compile the runtime value structure
1043 # RTVal both represents object instances and primitives values:
1044 # * object instances:
1045 # * `rtclass` the class of the RTVal is instance of
1046 # * `attrs` contains the attributes of the instance
1047 # * primitive values:
1048 # * `rtclass` represents the class of the primitive value Nit type
1049 # * `value` contains the primitive value of the instance
1051 # * they must have both `rtclass` and `value` as null
1052 fun compile_rtval
(compiler
: JavaCompiler) do
1053 var v
= compiler
.new_visitor
("RTVal.java")
1054 v
.add
("import java.util.HashMap;")
1055 v
.add
("public class RTVal \{")
1056 v
.add
(" public RTClass rtclass;")
1057 v
.add
(" public HashMap<String, RTVal> attrs = new HashMap<>();")
1058 v
.add
(" Object value;")
1059 v
.add
(" public RTVal(RTClass rtclass) \{")
1060 v
.add
(" this.rtclass = rtclass;")
1062 v
.add
(" public RTVal(RTClass rtclass, Object value) \{")
1063 v
.add
(" this.rtclass = rtclass;")
1064 v
.add
(" this.value = value;")
1066 v
.add
(" public boolean is_null() \{ return rtclass == null && value == null; \}")
1071 # A runtime variable hold a runtime value in Java.
1072 # Runtime variables are associated to Nit local variables and intermediate results in Nit expressions.
1073 class RuntimeVariable
1075 # The name of the variable in the Java code
1078 # The static type of the variable (as declard in Java)
1081 # The current casted type of the variable (as known in Nit)
1082 var mcasttype
: MType is writable
1084 # If the variable exaclty a mcasttype?
1085 # false (usual value) means that the variable is a mcasttype or a subtype.
1086 var is_exact
: Bool = false is writable
1088 # Is this variable declared as a RTVal or a Java primitive one?
1089 var is_boxed
= false
1091 redef fun to_s
do return name
1096 if self.is_exact
then
1097 exact_str
= " exact"
1102 if self.mtype
== self.mcasttype
then
1103 type_str
= "{mtype}{exact_str}"
1105 type_str
= "{mtype}({mcasttype}{exact_str})"
1107 return "<{name}:{type_str}>"
1111 # The static context of a visited property in a `JavaCompilerVisitor`
1112 class JavaStaticFrame
1113 # The associated visitor
1114 var visitor
: JavaCompilerVisitor
1116 # The executed property.
1117 # A Method in case of a call, an attribute in case of a default initialization.
1118 var mpropdef
: MPropDef
1120 # The static type of the receiver
1121 var receiver
: MClassType
1123 # Arguments of the method (the first is the receiver)
1124 var arguments
: Array[RuntimeVariable]
1126 # The runtime_variable associated to the return (in a function)
1127 var returnvar
: nullable RuntimeVariable = null is writable
1129 # The label at the end of the property
1130 var returnlabel
: nullable String = null is writable
1133 redef class Location
1134 # Return a shortened version of the location with `"{file}:{line_start}"`
1135 fun short_location
: String do
1136 var file
= self.file
1137 if file
== null then return "<no file>:{line_start}"
1138 return "{file.filename.escape_to_c}:{line_start}"
1143 # Return the Java type associated to a given Nit static type
1144 fun java_type
: String do return "RTVal"
1146 # Is the associated Java type a primitive one?
1148 # ENSURE `result == (java_type != "Object")`
1149 var is_java_primitive
: Bool is lazy
do return java_type
!= "RTVal"
1152 redef class MClassType
1154 redef var java_type
is lazy
do
1155 if mclass
.name
== "Int" then
1157 else if mclass
.name
== "Bool" then
1159 else if mclass
.name
== "Char" then
1161 else if mclass
.name
== "Float" then
1163 else if mclass
.name
== "Byte" then
1165 else if mclass
.name
== "NativeString" then
1167 else if mclass
.name
== "NativeArray" then
1177 private fun rt_name
: String do return "RTClass_{intro.mmodule.jname}_{jname}"
1179 # Generate a Java RTClass for a Nit MClass
1180 fun compile_to_java
(v
: JavaCompilerVisitor) do
1181 v
.add
("public class {rt_name} extends RTClass \{")
1182 v
.add
(" protected static RTClass instance;")
1183 v
.add
(" private {rt_name}() \{")
1184 v
.add
(" this.class_name = \"{name}\
";")
1186 compile_type_table
(v
)
1188 v
.add
(" public static RTClass get{rt_name}() \{")
1189 v
.add
(" if(instance == null) \{")
1190 v
.add
(" instance = new {rt_name}();")
1192 v
.add
(" return instance;")
1197 # Compile the virtual function table for the mclass
1198 private fun compile_vft
(v
: JavaCompilerVisitor) do
1199 # TODO handle generics
1200 if mclass_type
.need_anchor
then return
1201 var mclassdefs
= mclass_type
.collect_mclassdefs
(v
.compiler
.mainmodule
).to_a
1202 v
.compiler
.mainmodule
.linearize_mclassdefs
(mclassdefs
)
1204 var mainmodule
= v
.compiler
.mainmodule
1205 for mclassdef
in mclassdefs
.reversed
do
1206 for mprop
in mclassdef
.intro_mproperties
do
1207 var mpropdef
= mprop
.lookup_first_definition
(mainmodule
, intro
.bound_mtype
)
1208 if not mpropdef
isa MMethodDef then continue
1209 var rt_name
= mpropdef
.rt_name
1210 v
.add
("this.vft.put(\"{mprop.full_name}\
", {rt_name}.get{rt_name}());")
1212 # fill super next definitions
1213 while mpropdef
.has_supercall
do
1214 var prefix
= mpropdef
.full_name
1215 mpropdef
= mpropdef
.lookup_next_definition
(mainmodule
, intro
.bound_mtype
)
1216 rt_name
= mpropdef
.rt_name
1217 v
.add
("this.vft.put(\"{prefix}\
", {rt_name}.get{rt_name}());")
1223 # Compile the type table for the MClass
1224 fun compile_type_table
(v
: JavaCompilerVisitor) do
1225 for pclass
in in_hierarchy
(v
.compiler
.mainmodule
).greaters
do
1226 if pclass
== self then
1227 v
.add
("supers.put(\"{pclass.jname}\
", this);")
1229 v
.add
("supers.put(\"{pclass.jname}\
", {pclass.rt_name}.get{pclass.rt_name}());")
1235 # Used as a common type between MMethod and MMethodDef for `table_send`
1236 private interface TableCallable
1243 redef class MMethodDef
1247 private fun rt_name
: String do
1248 return "RTMethod_{mclassdef.mmodule.jname}_{mclassdef.mclass.jname}_{mproperty.jname}"
1251 # Generate a Java RTMethod for `self`
1252 fun compile_to_java
(v
: JavaCompilerVisitor) do
1253 v
.add
("public class {rt_name} extends RTMethod \{")
1254 v
.add
(" protected static RTMethod instance;")
1255 v
.add
(" public static RTMethod get{rt_name}() \{")
1256 v
.add
(" if(instance == null) \{")
1257 v
.add
(" instance = new {rt_name}();")
1259 v
.add
(" return instance;")
1262 v
.add
(" public RTVal exec(RTVal[] args) \{")
1263 compile_inside_to_java
(v
)
1268 # Compile the body of this function
1269 fun compile_inside_to_java
(v
: JavaCompilerVisitor) do
1271 var modelbuilder
= v
.compiler
.modelbuilder
1272 var node
= modelbuilder
.mpropdef2node
(self)
1275 v
.add_abort
("Abstract method `{mproperty.name}` called on `\" + {selfvar}.rtclass
.class_name
+\
"`")
1276 v
.add
("return null;")
1280 if node
isa APropdef then
1281 node
.compile_to_java
(v
, self)
1282 else if node
isa AClassdef then
1283 node
.compile_to_java
(v
, self)
1290 redef class AClassdef
1291 private fun compile_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef) do
1292 if mpropdef
== self.mfree_init
then
1293 var recv
= mpropdef
.mclassdef
.bound_mtype
1294 var arguments
= new Array[RuntimeVariable]
1295 var frame
= new JavaStaticFrame(v
, mpropdef
, recv
, arguments
)
1298 var selfvar
= v
.decl_var
("self", recv
)
1299 arguments
.add
(selfvar
)
1300 var boxed
= v
.new_expr
("args[0];", v
.compiler
.mainmodule
.object_type
)
1301 v
.add
"{selfvar} = {v.unbox(boxed, recv)};"
1303 var msignature
= mpropdef
.msignature
1305 if msignature
!= null then
1306 ret
= msignature
.return_mtype
1307 if ret
!= null then frame
.returnvar
= v
.new_var
(ret
)
1309 frame
.returnlabel
= v
.get_name
("RET_LABEL")
1311 assert mpropdef
.mproperty
.is_root_init
1312 if not mpropdef
.is_intro
then
1313 v
.supercall
(mpropdef
, arguments
.first
.mtype
.as(MClassType), arguments
)
1318 v
.add
("return null;")
1322 redef class APropdef
1324 # Compile that property definition to java code
1325 fun compile_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef) do
1326 v
.info
("NOT YET IMPLEMENTED {class_name}::compile_to_java")
1327 v
.add
("return null;")
1331 redef class AMethPropdef
1332 redef fun compile_to_java
(v
, mpropdef
) do
1333 var recv
= mpropdef
.mclassdef
.bound_mtype
1334 var arguments
= new Array[RuntimeVariable]
1335 var frame
= new JavaStaticFrame(v
, mpropdef
, recv
, arguments
)
1338 var selfvar
= v
.decl_var
("self", recv
)
1339 arguments
.add
(selfvar
)
1340 var boxed
= v
.new_expr
("args[0];", v
.compiler
.mainmodule
.object_type
)
1341 v
.add
"{selfvar} = {v.unbox(boxed, recv)};"
1343 var msignature
= mpropdef
.msignature
1345 if msignature
!= null then
1346 ret
= msignature
.return_mtype
1347 if ret
!= null then frame
.returnvar
= v
.new_var
(ret
)
1349 frame
.returnlabel
= v
.get_name
("RET_LABEL")
1351 if not mpropdef
.is_intern
and msignature
!= null then
1353 for mparam
in msignature
.mparameters
do
1354 var variable
= n_signature
.as(not null).n_params
[i
].variable
1355 if variable
== null then continue
1356 var argvar
= v
.variable
(variable
)
1357 boxed
= v
.new_expr
("args[{i + 1}];", v
.compiler
.mainmodule
.object_type
)
1358 v
.add
"{argvar} = {v.unbox(boxed, mparam.mtype)};"
1359 arguments
.add
(argvar
)
1364 v
.add
("{frame.returnlabel.as(not null)}: \{")
1366 # Call the implicit super-init
1367 var auto_super_inits
= self.auto_super_inits
1368 if auto_super_inits
!= null then
1369 var args
= [arguments
.first
]
1370 for auto_super_init
in auto_super_inits
do
1371 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
1373 for i
in [0..auto_super_init
.msignature
.arity
+1[ do
1374 args
.add
(arguments
[i
])
1376 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
1377 v
.compile_callsite
(auto_super_init
, args
)
1380 if auto_super_call
then
1381 v
.supercall
(mpropdef
, arguments
.first
.mtype
.as(MClassType), arguments
)
1384 compile_inside_to_java
(v
, mpropdef
)
1388 if ret
.is_java_primitive
then
1389 boxed
= v
.box
(frame
.returnvar
.as(not null), v
.compiler
.mainmodule
.object_type
)
1390 v
.add
("return {boxed};")
1392 v
.add
("return {frame.returnvar.as(not null)};")
1395 v
.add
("return null;")
1400 # Compile the inside of the method body
1401 private fun compile_inside_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef) do
1402 # Compile intern methods
1403 if mpropdef
.is_intern
then
1404 if compile_intern_to_java
(v
, mpropdef
, arguments
) then return
1405 v
.info
("NOT YET IMPLEMENTED compile_intern for {mpropdef}")
1406 v
.ret
(v
.null_instance
)
1410 # Compile block if any
1411 var n_block
= n_block
1412 if n_block
!= null then
1418 # Compile an intern method using Java primitives
1419 fun compile_intern_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef, arguments
: Array[RuntimeVariable]): Bool do
1420 var pname
= mpropdef
.mproperty
.name
1421 var cname
= mpropdef
.mclassdef
.mclass
.name
1422 var ret
= mpropdef
.msignature
.as(not null).return_mtype
1423 if cname
== "Int" then
1424 if pname
== "output" then
1425 v
.add
("System.out.println({arguments[0]});")
1426 v
.ret
(v
.null_instance
)
1428 else if pname
== "object_id" then
1429 v
.ret
(arguments
.first
)
1431 else if pname
== "+" then
1432 v
.ret
(v
.new_expr
("{arguments[0]} + {arguments[1]}", ret
.as(not null)))
1434 else if pname
== "-" then
1435 v
.ret
(v
.new_expr
("{arguments[0]} - {arguments[1]}", ret
.as(not null)))
1437 else if pname
== "unary -" then
1438 v
.ret
(v
.new_expr
("-{arguments[0]}", ret
.as(not null)))
1440 else if pname
== "unary +" then
1443 else if pname
== "*" then
1444 v
.ret
(v
.new_expr
("{arguments[0]} * {arguments[1]}", ret
.as(not null)))
1446 else if pname
== "/" then
1447 v
.ret
(v
.new_expr
("{arguments[0]} / {arguments[1]}", ret
.as(not null)))
1449 else if pname
== "%" then
1450 v
.ret
(v
.new_expr
("{arguments[0]} % {arguments[1]}", ret
.as(not null)))
1452 else if pname
== "lshift" then
1453 v
.ret
(v
.new_expr
("{arguments[0]} << {arguments[1]}", ret
.as(not null)))
1455 else if pname
== "rshift" then
1456 v
.ret
(v
.new_expr
("{arguments[0]} >> {arguments[1]}", ret
.as(not null)))
1458 else if pname
== "==" then
1459 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1461 else if pname
== "!=" then
1462 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1463 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1465 else if pname
== "<" then
1466 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1468 else if pname
== ">" then
1469 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1471 else if pname
== "<=" then
1472 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1474 else if pname
== ">=" then
1475 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1477 else if pname
== "to_f" then
1478 v
.ret
(v
.new_expr
("(double){arguments[0]}", ret
.as(not null)))
1480 else if pname
== "to_b" then
1481 v
.ret
(v
.new_expr
("(byte){arguments[0]}", ret
.as(not null)))
1483 else if pname
== "ascii" then
1484 v
.ret
(v
.new_expr
("(char){arguments[0]}", ret
.as(not null)))
1487 else if cname
== "Char" then
1488 if pname
== "output" then
1489 v
.add
("System.out.print({arguments[0]});")
1490 v
.ret
(v
.null_instance
)
1492 else if pname
== "object_id" then
1493 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1495 else if pname
== "successor" then
1496 v
.ret
(v
.new_expr
("(char)({arguments[0]} + {arguments[1]})", ret
.as(not null)))
1498 else if pname
== "predecessor" then
1499 v
.ret
(v
.new_expr
("(char)({arguments[0]} - {arguments[1]})", ret
.as(not null)))
1501 else if pname
== "==" then
1502 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1504 else if pname
== "!=" then
1505 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1506 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1508 else if pname
== "<" then
1509 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1511 else if pname
== ">" then
1512 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1514 else if pname
== "<=" then
1515 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1517 else if pname
== ">=" then
1518 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1520 else if pname
== "to_i" then
1521 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1523 else if pname
== "ascii" then
1524 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1527 else if cname
== "Byte" then
1528 if pname
== "output" then
1529 v
.add
("System.out.println({arguments[0]});")
1530 v
.ret
(v
.null_instance
)
1532 else if pname
== "object_id" then
1533 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1535 else if pname
== "+" then
1536 v
.ret
(v
.new_expr
("(byte)({arguments[0]} + {arguments[1]})", ret
.as(not null)))
1538 else if pname
== "-" then
1539 v
.ret
(v
.new_expr
("(byte)({arguments[0]} - {arguments[1]})", ret
.as(not null)))
1541 else if pname
== "unary -" then
1542 v
.ret
(v
.new_expr
("(byte)(-{arguments[0]})", ret
.as(not null)))
1544 else if pname
== "unary +" then
1547 else if pname
== "*" then
1548 v
.ret
(v
.new_expr
("(byte)({arguments[0]} * {arguments[1]})", ret
.as(not null)))
1550 else if pname
== "/" then
1551 v
.ret
(v
.new_expr
("(byte)({arguments[0]} / {arguments[1]})", ret
.as(not null)))
1553 else if pname
== "%" then
1554 v
.ret
(v
.new_expr
("(byte)({arguments[0]} % {arguments[1]})", ret
.as(not null)))
1556 else if pname
== "lshift" then
1557 v
.ret
(v
.new_expr
("(byte)({arguments[0]} << {arguments[1]})", ret
.as(not null)))
1559 else if pname
== "rshift" then
1560 v
.ret
(v
.new_expr
("(byte)({arguments[0]} >> {arguments[1]})", ret
.as(not null)))
1562 else if pname
== "==" then
1563 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1565 else if pname
== "!=" then
1566 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1567 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1569 else if pname
== "<" then
1570 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1572 else if pname
== ">" then
1573 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1575 else if pname
== "<=" then
1576 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1578 else if pname
== ">=" then
1579 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1581 else if pname
== "to_i" then
1582 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1584 else if pname
== "to_f" then
1585 v
.ret
(v
.new_expr
("(double){arguments[0]}", ret
.as(not null)))
1587 else if pname
== "ascii" then
1588 v
.ret
(v
.new_expr
("{arguments[0]}", ret
.as(not null)))
1591 else if cname
== "Bool" then
1592 if pname
== "output" then
1593 v
.add
("System.out.println({arguments[0]});")
1594 v
.ret
(v
.null_instance
)
1596 else if pname
== "object_id" then
1597 v
.ret
(v
.new_expr
("{arguments[0]}?1:0", ret
.as(not null)))
1599 else if pname
== "==" then
1600 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1602 else if pname
== "!=" then
1603 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1604 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1607 else if cname
== "Float" then
1608 if pname
== "output" then
1609 v
.add
"if({arguments[0]} == Double.POSITIVE_INFINITY) \{"
1610 v
.add
"System.out.println(\"inf\
");"
1611 v
.add
"\} else if({arguments[0]} == Double.POSITIVE_INFINITY) \{"
1612 v
.add
"System.out.println(\"-inf\
");"
1614 var df
= v
.get_name
("df")
1615 v
.add
"java.text.DecimalFormat {df} = new java.text.DecimalFormat(\"0.000000\
");"
1616 v
.add
"System.out.println({df}.format({arguments[0]}));"
1618 v
.ret
(v
.null_instance
)
1620 else if pname
== "object_id" then
1621 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1623 else if pname
== "+" then
1624 v
.ret
(v
.new_expr
("{arguments[0]} + {arguments[1]}", ret
.as(not null)))
1626 else if pname
== "-" then
1627 v
.ret
(v
.new_expr
("{arguments[0]} - {arguments[1]}", ret
.as(not null)))
1629 else if pname
== "unary -" then
1630 v
.ret
(v
.new_expr
("-{arguments[0]}", ret
.as(not null)))
1632 else if pname
== "unary +" then
1635 else if pname
== "succ" then
1636 v
.ret
(v
.new_expr
("{arguments[0]} + 1", ret
.as(not null)))
1638 else if pname
== "prec" then
1639 v
.ret
(v
.new_expr
("{arguments[0]} - 1", 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
.equal_test
(arguments
[0], arguments
[1]))
1650 else if pname
== "!=" then
1651 var res
= v
.equal_test
(arguments
[0], arguments
[1])
1652 v
.ret
(v
.new_expr
("!{res}", ret
.as(not null)))
1654 else if pname
== "<" then
1655 v
.ret
(v
.new_expr
("{arguments[0]} < {arguments[1]}", ret
.as(not null)))
1657 else if pname
== ">" then
1658 v
.ret
(v
.new_expr
("{arguments[0]} > {arguments[1]}", ret
.as(not null)))
1660 else if pname
== "<=" then
1661 v
.ret
(v
.new_expr
("{arguments[0]} <= {arguments[1]}", ret
.as(not null)))
1663 else if pname
== ">=" then
1664 v
.ret
(v
.new_expr
("{arguments[0]} >= {arguments[1]}", ret
.as(not null)))
1666 else if pname
== "to_i" then
1667 v
.ret
(v
.new_expr
("(int){arguments[0]}", ret
.as(not null)))
1669 else if pname
== "to_b" then
1670 v
.ret
(v
.new_expr
("(byte){arguments[0]}", ret
.as(not null)))
1674 if pname
== "exit" then
1675 v
.add
("System.exit({arguments[1]});")
1676 v
.ret
(v
.null_instance
)
1678 else if pname
== "sys" then
1680 var main_type
= v
.compiler
.mainmodule
.sys_type
.as(not null)
1681 var sys
= main_type
.mclass
1682 v
.ret
(v
.new_expr
("new RTVal({sys.rt_name}.get{sys.rt_name}())", main_type
))
1684 else if pname
== "object_id" then
1685 v
.ret
(v
.new_expr
("{arguments[0]}.hashCode()", ret
.as(not null)))
1687 else if pname
== "is_same_type" then
1688 v
.ret
(v
.is_same_type_test
(arguments
[0], arguments
[1]))
1690 else if pname
== "is_same_instance" then
1691 v
.ret
(v
.equal_test
(arguments
[0], arguments
[1]))
1693 else if pname
== "output_class_name" then
1694 v
.add
("System.out.println({arguments[0]}.rtclass.class_name);")
1695 v
.ret
(v
.null_instance
)
1702 redef class AAttrPropdef
1703 redef fun compile_to_java
(v
, mpropdef
, arguments
) do
1704 v
.current_node
= self
1705 if mpropdef
== mreadpropdef
then
1706 compile_getter
(v
, mpropdef
, arguments
)
1707 else if mpropdef
== mwritepropdef
then
1708 compile_setter
(v
, mpropdef
, arguments
)
1712 v
.current_node
= null
1715 # Compile the setter method
1716 private fun compile_setter
(v
: JavaCompilerVisitor, mpropdef
: MPropDef, arguments
: Array[RuntimeVariable]) do
1717 var mtype
= v
.compiler
.mainmodule
.object_type
1718 var recv
= arguments
.first
1719 var val
= v
.new_expr
("args[1]", mtype
)
1720 v
.write_attribute
(self.mpropdef
.as(not null).mproperty
, recv
, val
)
1721 v
.ret v
.null_instance
1724 # Compile the getter method
1725 private fun compile_getter
(v
: JavaCompilerVisitor, mpropdef
: MPropDef, arguments
: Array[RuntimeVariable]) do
1726 var recv
= arguments
.first
1727 v
.ret v
.read_attribute
(self.mpropdef
.as(not null).mproperty
, recv
)
1730 private fun init_expr
(v
: JavaCompilerVisitor, recv
: RuntimeVariable) do
1731 if has_value
and not is_lazy
and not n_expr
isa ANullExpr then evaluate_expr
(v
, recv
)
1734 # Evaluate, store and return the default value of the attribute
1735 private fun evaluate_expr
(v
: JavaCompilerVisitor, recv
: RuntimeVariable): RuntimeVariable do
1737 var frame
= new JavaStaticFrame(v
, self.mreadpropdef
.as(not null), recv
.mcasttype
.undecorate
.as(MClassType), [recv
])
1741 var mtype
= self.mtype
1742 assert mtype
!= null
1744 var nexpr
= self.n_expr
1745 var nblock
= self.n_block
1746 if nexpr
!= null then
1747 value
= v
.expr
(nexpr
, mtype
)
1748 else if nblock
!= null then
1749 value
= v
.new_var
(mtype
)
1750 frame
.returnvar
= value
1751 frame
.returnlabel
= v
.get_name
("RET_LABEL")
1752 v
.add
("{frame.returnlabel.as(not null)}: \{")
1759 v
.write_attribute
(self.mpropdef
.as(not null).mproperty
, recv
, value
)
1766 # Try to compile self as an expression
1767 # Do not call this method directly, use `v.expr` instead
1768 private fun expr
(v
: JavaCompilerVisitor): nullable RuntimeVariable do
1769 v
.info
("NOT YET IMPLEMENTED {class_name}::expr")
1773 # Try to compile self as a statement
1774 # Do not call this method directly, use `v.stmt` instead
1775 private fun stmt
(v
: JavaCompilerVisitor) do expr
(v
)
1778 redef class ABlockExpr
1781 for e
in self.n_expr
do v
.stmt
(e
)
1785 var last
= self.n_expr
.last
1786 for e
in self.n_expr
do
1787 if e
== last
then break
1790 return v
.expr
(last
, null)
1794 redef class ASendExpr
1795 redef fun expr
(v
) do
1796 var recv
= v
.expr
(n_expr
, null)
1797 var callsite
= callsite
.as(not null)
1798 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, raw_arguments
)
1799 return v
.compile_callsite
(callsite
, args
)
1803 redef class ANewExpr
1806 var mtype
= self.recvtype
1807 assert mtype
!= null
1809 if mtype
.mclass
.name
== "NativeArray" then
1810 # TODO handle native arrays
1811 v
.info
("NOT YET IMPLEMENTED new NativeArray")
1814 var recv
= v
.init_instance
(mtype
)
1816 var callsite
= self.callsite
1817 if callsite
== null then return recv
1819 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
1820 var res2
= v
.compile_callsite
(callsite
, args
)
1821 if res2
!= null then
1828 redef class ASuperExpr
1832 assert frame
!= null
1833 var recv
= frame
.arguments
.first
1835 var callsite
= self.callsite
1836 if callsite
!= null then
1839 if self.n_args
.n_exprs
.is_empty
then
1840 # Add automatic arguments for the super init call
1842 for i
in [0..callsite
.msignature
.arity
[ do
1843 args
.add
(frame
.arguments
[i
+1])
1846 args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
1850 var res
= v
.compile_callsite
(callsite
, args
)
1854 var mpropdef
= self.mpropdef
.as(not null)
1857 if self.n_args
.n_exprs
.is_empty
then
1858 args
= frame
.arguments
1860 args
= v
.varargize
(mpropdef
, signaturemap
, recv
, self.n_args
.n_exprs
)
1863 # Standard call-next-method
1864 return v
.supercall
(mpropdef
, recv
.mtype
.as(MClassType), args
)
1868 redef class ASelfExpr
1869 redef fun expr
(v
) do return v
.frame
.as(not null).arguments
.first
1872 redef class AImplicitSelfExpr
1873 redef fun expr
(v
) do return v
.frame
.as(not null).arguments
.first
1876 redef class AAttrExpr
1877 redef fun expr
(v
) do
1878 var recv
= v
.expr
(self.n_expr
, null)
1879 var mproperty
= self.mproperty
.as(not null)
1880 return v
.read_attribute
(mproperty
, recv
)
1884 redef class AAttrAssignExpr
1885 redef fun expr
(v
) do
1886 var recv
= v
.expr
(self.n_expr
, null)
1887 var i
= v
.expr
(self.n_value
, null)
1888 var mproperty
= self.mproperty
.as(not null)
1889 v
.write_attribute
(mproperty
, recv
, i
)
1894 redef class AAttrReassignExpr
1895 redef fun stmt
(v
) do
1896 var recv
= v
.expr
(self.n_expr
, null)
1897 var value
= v
.expr
(self.n_value
, null)
1898 var mproperty
= self.mproperty
.as(not null)
1899 var attr
= v
.read_attribute
(mproperty
, recv
)
1900 var res
= v
.compile_callsite
(self.reassign_callsite
.as(not null), [attr
, value
])
1902 v
.write_attribute
(mproperty
, recv
, res
)
1906 redef class AIssetAttrExpr
1907 redef fun expr
(v
) do
1908 var recv
= v
.expr
(self.n_expr
, null)
1909 var mproperty
= self.mproperty
.as(not null)
1910 return v
.isset_attribute
(mproperty
, recv
)
1914 redef class AReturnExpr
1915 redef fun stmt
(v
) do
1916 var nexpr
= self.n_expr
1918 assert frame
!= null
1919 if nexpr
!= null then
1920 v
.ret
(v
.expr
(nexpr
, frame
.returnvar
.as(not null).mtype
))
1922 v
.ret
(v
.null_instance
)
1928 redef fun stmt
(v
) do
1929 var cond
= v
.expr_bool
(self.n_expr
)
1930 v
.add
("if ({cond})\{")
1937 redef fun expr
(v
) do
1938 var res
= v
.new_var
(self.mtype
.as(not null))
1939 var cond
= v
.expr_bool
(self.n_expr
)
1940 v
.add
("if ({cond})\{")
1941 v
.assign
(res
, v
.expr
(self.n_then
.as(not null), null))
1943 v
.assign
(res
, v
.expr
(self.n_else
.as(not null), null))
1949 redef class AVardeclExpr
1950 redef fun stmt
(v
) do
1951 var variable
= self.variable
.as(not null)
1952 var ne
= self.n_expr
1953 var decl
= v
.variable
(variable
)
1955 var i
= v
.expr
(ne
, variable
.declared_type
)
1961 redef class AVarExpr
1962 redef fun expr
(v
) do
1963 return v
.variable
(self.variable
.as(not null))
1967 redef class AVarAssignExpr
1968 redef fun expr
(v
) do
1969 var variable
= self.variable
.as(not null)
1970 var i
= v
.expr
(self.n_value
, variable
.declared_type
)
1971 v
.assign
(v
.variable
(variable
), i
)
1976 redef class AIntExpr
1977 redef fun expr
(v
) do return v
.int_instance
(self.value
.as(not null))
1980 redef class AByteExpr
1981 redef fun expr
(v
) do return v
.byte_instance
(self.value
.as(not null))
1984 redef class AFloatExpr
1985 redef fun expr
(v
) do return v
.float_instance
("{self.n_float.text}") # FIXME use value, not n_float
1988 redef class ACharExpr
1989 redef fun expr
(v
) do return v
.char_instance
(self.value
.as(not null))
1992 redef class ATrueExpr
1993 redef fun expr
(v
) do return v
.bool_instance
(true)
1996 redef class AFalseExpr
1997 redef fun expr
(v
) do return v
.bool_instance
(false)
2000 redef class ANullExpr
2001 redef fun expr
(v
) do return v
.null_instance
2004 redef class AParExpr
2005 redef fun expr
(v
) do return v
.expr
(self.n_expr
, null)
2008 redef class AAbortExpr
2009 redef fun stmt
(v
) do v
.add_abort
("Aborted")
2012 redef class ADebugTypeExpr
2013 redef fun stmt
(v
) do end # do nothing