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
30 redef class ToolContext
32 # Where to output the generated binary
33 var opt_output
= new OptionString("Output file", "-o", "--output")
35 # Where to output tmp files
36 var opt_compile_dir
= new OptionString("Directory used to generate temporary files", "--compile-dir")
40 option_context
.add_option
(opt_output
, opt_compile_dir
)
44 redef class ModelBuilder
46 # Start the Java compiler
47 fun run_java_compiler
(mainmodule
: MModule, runtime_type_analysis
: RapidTypeAnalysis) do
49 toolcontext
.info
("*** GENERATING JAVA ***", 1)
51 var compiler
= new JavaCompiler(mainmodule
, self, runtime_type_analysis
)
52 compiler
.do_compilation
55 toolcontext
.info
("*** END GENERATING JAVA: {time1-time0} ***", 2)
56 write_and_make
(compiler
)
59 # Write Java code and compile it into an executable jar
60 fun write_and_make
(compiler
: JavaCompiler) do
62 toolcontext
.info
("*** WRITING JAVA ***", 1)
64 compiler
.compile_dir
.mkdir
66 var jfiles
= write_java_files
(compiler
)
69 toolcontext
.info
("*** END WRITING JAVA: {time1-time0} ***", 2)
72 toolcontext
.info
("*** COMPILING JAVA ***", 1)
74 build_with_make
(compiler
, jfiles
)
75 write_shell_script
(compiler
)
78 toolcontext
.info
("*** END COMPILING JAVA: {time1-time0} ***", 2)
81 # Write files managed by `compiler` into concrete files
82 fun write_java_files
(compiler
: JavaCompiler): Array[String] do
83 var jfiles
= new Array[String]
84 for f
in compiler
.files
do
85 var file
= new FileWriter.open
("{compiler.compile_dir}/{f.filename}")
86 for line
in f
.lines
do file
.write
(line
)
88 jfiles
.add
(f
.filename
)
93 # Compile Java generated files using `make`
94 fun build_with_make
(compiler
: JavaCompiler, jfiles
: Array[String]) do
95 write_manifest
(compiler
)
96 write_makefile
(compiler
, jfiles
)
97 var compile_dir
= compiler
.compile_dir
98 var outname
= compiler
.outname
.to_path
.filename
99 toolcontext
.info
("make -N -C {compile_dir} -f {outname}.mk", 2)
101 if toolcontext
.verbose_level
>= 3 then
102 res
= sys
.system
("make -B -C {compile_dir} -f {outname}.mk 2>&1")
104 res
= sys
.system
("make -B -C {compile_dir} -f {outname}.mk 2>&1 > /dev/null")
106 if res
!= 0 then toolcontext
.error
(null, "make failed! Error code: {res}.")
109 # Write the Makefile used to compile Java generated files into an executable jar
110 fun write_makefile
(compiler
: JavaCompiler, jfiles
: Array[String]) do
111 # list class files from jfiles
112 var ofiles
= new List[String]
113 for f
in jfiles
do ofiles
.add
(f
.strip_extension
(".java") + ".class")
115 var compile_dir
= compiler
.compile_dir
116 var outname
= compiler
.outname
.to_path
.filename
117 var outpath
= (sys
.getcwd
/ compiler
.outname
).simplify_path
118 var makename
= "{compile_dir}/{outname}.mk"
119 var makefile
= new FileWriter.open
(makename
)
121 makefile
.write
("JC = javac\n")
122 makefile
.write
("JAR = jar\n\n")
124 makefile
.write
("all: {outpath}.jar\n\n")
126 makefile
.write
("{outpath}.jar: {compiler.mainmodule.jname}_Main.class\n")
127 makefile
.write
("\t$(JAR) cfm {outpath}.jar {outname}.mf {ofiles.join(" ")}\n\n")
129 makefile
.write
("{compiler.mainmodule.jname}_Main.class:\n")
130 makefile
.write
("\t$(JC) {jfiles.join(" ")}\n\n")
132 makefile
.write
("clean:\n")
133 makefile
.write
("\trm {ofiles.join(" ")} 2>/dev/null\n\n")
136 toolcontext
.info
("Generated makefile: {makename}", 2)
139 # Write the Java manifest file
140 private fun write_manifest
(compiler
: JavaCompiler) do
141 var compile_dir
= compiler
.compile_dir
142 var outname
= compiler
.outname
.to_path
.filename
143 var maniffile
= new FileWriter.open
("{compile_dir}/{outname}.mf")
144 maniffile
.write
("Manifest-Version: 1.0\n")
145 maniffile
.write
("Main-Class: {compiler.mainmodule.jname}_Main\n")
149 # Write a simple bash script that runs the jar like it was a binary generated by nitc
150 private fun write_shell_script
(compiler
: JavaCompiler) do
151 var outname
= compiler
.outname
152 var shfile
= new FileWriter.open
(outname
)
153 shfile
.write
("#!/bin/bash\n")
154 shfile
.write
("java -jar {outname}.jar \"$@\
"\n")
156 sys
.system
("chmod +x {outname}")
160 # Compiler that translates Nit code to Java code
162 # The main module of the program currently compiled
163 var mainmodule
: MModule
165 # Modelbuilder used to know the model and the AST
166 var modelbuilder
: ModelBuilder
168 # The result of the RTA (used to know live types and methods)
169 var runtime_type_analysis
: RapidTypeAnalysis
171 # Where to generate tmp files
172 var compile_dir
: String is lazy
do
173 var dir
= modelbuilder
.toolcontext
.opt_compile_dir
.value
174 if dir
== null then dir
= "nitj_compile"
178 # Name of the generated executable
179 var outname
: String is lazy
do
180 var name
= modelbuilder
.toolcontext
.opt_output
.value
181 if name
== null then name
= mainmodule
.jname
185 # The list of all associated files
186 # Used to generate .java files
187 var files
: Array[JavaCodeFile] = new Array[JavaCodeFile]
189 # Force the creation of a new file
190 # The point is to avoid contamination between must-be-compiled-separately files
191 fun new_file
(name
: String): JavaCodeFile do
192 var file
= new JavaCodeFile(name
)
197 # Kind of visitor to use
198 type VISITOR: JavaCompilerVisitor
200 # Initialize a visitor specific for the compiler engine
201 fun new_visitor
(filename
: String): VISITOR do
202 return new JavaCompilerVisitor(self, new_file
(filename
))
205 # RuntimeModel representation
206 private var rt_model
: JavaRuntimeModel is lazy
do return new JavaRuntimeModel
208 # Compile Nit code to Java
209 fun do_compilation
do
210 # compile java classes used to represents the runtime model of the program
211 rt_model
.compile_rtmodel
(self)
214 # compile class structures
215 compile_mclasses_to_java
217 # compile method structures
218 compile_mmethods_to_java
221 modelbuilder
.toolcontext
.info
("NOT YET IMPLEMENTED", 0)
224 # Prepare the boxes used to represent Java primitive types
225 fun compile_box_kinds
do
226 # Collect all bas box class
227 # FIXME: this is not completely fine with a separate compilation scheme
228 for classname
in ["Int", "Bool", "Byte", "Char", "Float"] do
229 var classes
= mainmodule
.model
.get_mclasses_by_name
(classname
)
230 if classes
== null then continue
231 assert classes
.length
== 1 else print classes
.join
(", ")
232 box_kinds
.add
(classes
.first
.mclass_type
)
236 # Types of boxes used to represent Java primitive types
237 var box_kinds
= new Array[MClassType]
239 # Generate a `RTClass` for each `MClass` found in model
241 # This is a global phase because we need to know all the program to build
242 # attributes, fill vft and type table.
243 fun compile_mclasses_to_java
do
244 for mclass
in mainmodule
.model
.mclasses
do
245 mclass
.compile_to_java
(new_visitor
("{mclass.rt_name}.java"))
249 # Generate a `RTMethod` for each `MMethodDef` found in model
251 # This is a separate phase.
252 fun compile_mmethods_to_java
do
253 for mmodule
in mainmodule
.in_importation
.greaters
do
254 for mclassdef
in mmodule
.mclassdefs
do
255 for mdef
in mclassdef
.mpropdefs
do
256 if mdef
isa MMethodDef then
257 mdef
.compile_to_java
(new_visitor
("{mdef.rt_name}.java"))
265 # The class visiting the AST
267 # A visitor is attached to one JavaCodeFile it writes into.
268 class JavaCompilerVisitor
271 # JavaCompiler used with this visitor
272 type COMPILER: JavaCompiler
274 # The associated compiler
275 var compiler
: JavaCompiler
277 # The file to write generated code into
278 var file
: JavaCodeFile
282 private var names
= new HashSet[String]
283 private var last
: Int = 0
285 # Return a new name based on `s` and unique in the visitor
286 fun get_name
(s
: String): String do
287 if not self.names
.has
(s
) then
291 var i
= self.last
+ 1
294 if not self.names
.has
(s2
) then
305 # Registered variables
306 protected var variables
= new HashMap[Variable, RuntimeVariable]
308 # Return the local RuntimeVariable associated to a Nit local variable
309 fun variable
(variable
: Variable): RuntimeVariable do
310 if variables
.has_key
(variable
) then
311 return variables
[variable
]
313 var name
= get_name
("var_{variable.name}")
314 var mtype
= variable
.declared_type
.as(not null)
315 mtype
= anchor
(mtype
)
316 var res
= decl_var
(name
, mtype
)
317 variables
[variable
] = res
322 # Return a new uninitialized local RuntimeVariable with `name`
323 fun decl_var
(name
: String, mtype
: MType): RuntimeVariable do
324 var res
= new RuntimeVariable(name
, mtype
, mtype
)
325 res
.is_boxed
= not mtype
.is_java_primitive
326 add
("{mtype.java_type} {name} /* : {mtype} */;")
330 # Return a new uninitialized local RuntimeVariable
331 fun new_var
(mtype
: MType): RuntimeVariable do
332 mtype
= anchor
(mtype
)
333 var name
= self.get_name
("var")
334 return decl_var
(name
, mtype
)
339 # The current `JavaStaticFrame`
340 var frame
: nullable JavaStaticFrame = null is writable
342 # Return a new local RuntimeVariable initialized from `args[0]`
343 fun new_recv
(mtype
: MType): RuntimeVariable do
344 var res
= new_var
(mtype
)
345 add
("{res} = args[0];")
351 # Add a line (will be suffixed by `\n`)
352 fun add
(line
: String) do file
.lines
.add
("{line}\n")
354 # Add a new partial line (no `\n` suffix)
355 fun addn
(line
: String) do file
.lines
.add
(line
)
357 # Compile a statement (if any)
358 fun stmt
(nexpr
: nullable AExpr) do
359 if nexpr
== null then return
360 var old
= self.current_node
366 # Compile an expression an return its result
367 # `mtype` is the expected return type, pass null if no specific type is expected.
368 fun expr
(nexpr
: AExpr, mtype
: nullable MType): RuntimeVariable do
369 var old
= current_node
373 if nexpr
.mtype
!= null then
374 res
= nexpr
.expr
(self)
377 if mtype
!= null then
378 mtype
= anchor
(mtype
)
379 res
= autobox
(res
, mtype
)
386 # Correctly assign a left and a right value
387 # Boxing and unboxing is performed if required
388 fun assign
(left
, right
: RuntimeVariable) do
389 add
("{left} = {autobox(right, left.mtype)};")
392 # Return a new local RuntimeVariable initialized with the Java expression `jexpr`.
394 # `mtype` is used for the Java return variable initialization.
395 fun new_expr
(jexpr
: String, mtype
: MType): RuntimeVariable do
396 var res
= new_var
(mtype
)
397 add
("{res} = {jexpr};")
401 # Generate generic abort
403 # Used by aborts, asserts, casts, etc.
404 fun add_abort
(message
: String) do
405 add
("System.err.print(\"Runtime error
: {message}\
");")
406 var node
= current_node
408 add
("System.err.print(\" ({node.location.short_location})\
");")
410 add
("System.err.println(\"\
");")
411 add
("System.exit(1);")
416 # Anchor a type to the main module and the current receiver
417 fun anchor
(mtype
: MType): MType do
418 if not mtype
.need_anchor
then return mtype
419 return mtype
.anchor_to
(compiler
.mainmodule
, frame
.as(not null).receiver
)
422 # Adapt the arguments of a method according to targetted `MMethodDef`
423 fun adapt_signature
(m
: MMethodDef, args
: Array[RuntimeVariable]) do
424 var msignature
= m
.msignature
.as(not null).resolve_for
(
425 m
.mclassdef
.bound_mtype
,
426 m
.mclassdef
.bound_mtype
,
427 m
.mclassdef
.mmodule
, true)
428 args
.first
= autobox
(args
.first
, compiler
.mainmodule
.object_type
)
429 for i
in [0..msignature
.arity
[ do
430 args
[i
+1] = autobox
(args
[i
+ 1], compiler
.mainmodule
.object_type
)
434 # Box primitive `value` to `mtype`.
435 private fun box
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
436 if value
.is_boxed
then return value
437 var obj_type
= compiler
.mainmodule
.object_type
438 if value
.mtype
isa MNullType then
439 return new_expr
("new RTVal(null, null)", compiler
.mainmodule
.model
.null_type
)
441 var mbox
= value
.mtype
.as(MClassType).mclass
442 return new_expr
("new RTVal({mbox.rt_name}.get{mbox.rt_name}(), {value})", obj_type
)
445 # Unbox primitive `value` to `mtype`.
446 private fun unbox
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
447 if not value
.is_boxed
then return value
448 if not mtype
.is_java_primitive
then return value
449 if compiler
.box_kinds
.has
(mtype
) then
450 return new_expr
("({mtype.java_type}){value}.value", mtype
)
452 info
"NOT YET IMPLEMENTED unbox for {value} ({mtype})"
457 # Box or unbox primitive `value` to `mtype` if needed.
458 private fun autobox
(value
: RuntimeVariable, mtype
: MType): RuntimeVariable do
459 if mtype
.is_java_primitive
then return unbox
(value
, mtype
)
460 return box
(value
, mtype
)
463 # Can this `value` be a primitive Java value?
464 private fun can_be_primitive
(value
: RuntimeVariable): Bool do
465 var t
= value
.mcasttype
.undecorate
466 if not t
isa MClassType then return false
467 var k
= t
.mclass
.kind
468 return k
== interface_kind
or t
.is_java_primitive
473 # Generate an integer value
474 fun int_instance
(value
: Int): RuntimeVariable do
475 var t
= compiler
.mainmodule
.int_type
476 return new RuntimeVariable(value
.to_s
, t
, t
)
479 # Generate a byte value
480 fun byte_instance
(value
: Byte): RuntimeVariable do
481 var t
= compiler
.mainmodule
.byte_type
482 return new RuntimeVariable(value
.to_s
, t
, t
)
485 # Generate a char value
486 fun char_instance
(value
: Char): RuntimeVariable do
487 var t
= compiler
.mainmodule
.char_type
488 return new RuntimeVariable("'{value.to_s.escape_to_c}'", t
, t
)
491 # Generate a float value
493 # FIXME pass a Float, not a string
494 fun float_instance
(value
: String): RuntimeVariable do
495 var t
= compiler
.mainmodule
.float_type
496 return new RuntimeVariable(value
.to_s
, t
, t
)
499 # Generate an integer value
500 fun bool_instance
(value
: Bool): RuntimeVariable do
501 var t
= compiler
.mainmodule
.bool_type
502 return new RuntimeVariable(value
.to_s
, t
, t
)
505 # Generate the `null` value
506 fun null_instance
: RuntimeVariable do
507 var t
= compiler
.mainmodule
.model
.null_type
508 return new RuntimeVariable("null", t
, t
)
513 # Display a info message
514 fun info
(str
: String) do compiler
.modelbuilder
.toolcontext
.info
(str
, 0)
517 # A file containing Java code.
524 var lines
: List[String] = new List[String]
528 # A Java compatible name for `self`
529 private fun jname
: String do return name
.to_cmangle
532 # Handler for runtime classes generation
534 # We need 3 kinds of runtime structures:
535 # * `RTClass` to represent a global class
536 # * `RTMethod` to represent a method definition
537 # * `RTVal` to represent runtime variables
538 class JavaRuntimeModel
540 # Compile JavaRuntimeModel structures
541 fun compile_rtmodel
(compiler
: JavaCompiler) do
542 compile_rtclass
(compiler
)
543 compile_rtmethod
(compiler
)
544 compile_rtval
(compiler
)
547 # Compile the abstract runtime class structure
549 # Runtime classes have 3 attributes:
550 # * `class_name`: the class name as a String
551 # * `vft`: the virtual function table for the class (flattened)
552 # * `supers`: the super type table (used for type tests)
553 fun compile_rtclass
(compiler
: JavaCompiler) do
554 var v
= compiler
.new_visitor
("RTClass.java")
555 v
.add
("import java.util.HashMap;")
556 v
.add
("public abstract class RTClass \{")
557 v
.add
(" public String class_name;")
558 v
.add
(" public HashMap<String, RTMethod> vft = new HashMap<>();")
559 v
.add
(" public HashMap<String, RTClass> supers = new HashMap<>();")
560 v
.add
(" protected RTClass() \{\}")
564 # Compile the abstract runtime method structure
566 # Method body is executed through the `exec` method:
567 # * `exec` always take an array of RTVal as arg, the first one must be the receiver
568 # * `exec` always returns a RTVal (or null if the Nit return type is void)
569 fun compile_rtmethod
(compiler
: JavaCompiler) do
570 var v
= compiler
.new_visitor
("RTMethod.java")
571 v
.add
("public abstract class RTMethod \{")
572 v
.add
(" protected RTMethod() \{\}")
573 v
.add
(" public abstract RTVal exec(RTVal[] args);")
577 # Compile the runtime value structure
579 # RTVal both represents object instances and primitives values:
580 # * object instances:
581 # * `rtclass` the class of the RTVal is instance of
582 # * `attrs` contains the attributes of the instance
583 # * primitive values:
584 # * `rtclass` represents the class of the primitive value Nit type
585 # * `value` contains the primitive value of the instance
587 # * they must have both `rtclass` and `value` as null
588 fun compile_rtval
(compiler
: JavaCompiler) do
589 var v
= compiler
.new_visitor
("RTVal.java")
590 v
.add
("import java.util.HashMap;")
591 v
.add
("public class RTVal \{")
592 v
.add
(" public RTClass rtclass;")
593 v
.add
(" public HashMap<String, RTVal> attrs = new HashMap<>();")
594 v
.add
(" Object value;")
595 v
.add
(" public RTVal(RTClass rtclass) \{")
596 v
.add
(" this.rtclass = rtclass;")
598 v
.add
(" public RTVal(RTClass rtclass, Object value) \{")
599 v
.add
(" this.rtclass = rtclass;")
600 v
.add
(" this.value = value;")
602 v
.add
(" public boolean is_null() \{ return rtclass == null && value == null; \}")
607 # A runtime variable hold a runtime value in Java.
608 # Runtime variables are associated to Nit local variables and intermediate results in Nit expressions.
609 class RuntimeVariable
611 # The name of the variable in the Java code
614 # The static type of the variable (as declard in Java)
617 # The current casted type of the variable (as known in Nit)
618 var mcasttype
: MType is writable
620 # If the variable exaclty a mcasttype?
621 # false (usual value) means that the variable is a mcasttype or a subtype.
622 var is_exact
: Bool = false is writable
624 # Is this variable declared as a RTVal or a Java primitive one?
627 redef fun to_s
do return name
632 if self.is_exact
then
638 if self.mtype
== self.mcasttype
then
639 type_str
= "{mtype}{exact_str}"
641 type_str
= "{mtype}({mcasttype}{exact_str})"
643 return "<{name}:{type_str}>"
647 # The static context of a visited property in a `JavaCompilerVisitor`
648 class JavaStaticFrame
649 # The associated visitor
650 var visitor
: JavaCompilerVisitor
652 # The executed property.
653 # A Method in case of a call, an attribute in case of a default initialization.
654 var mpropdef
: MPropDef
656 # The static type of the receiver
657 var receiver
: MClassType
659 # Arguments of the method (the first is the receiver)
660 var arguments
: Array[RuntimeVariable]
662 # The runtime_variable associated to the return (in a function)
663 var returnvar
: nullable RuntimeVariable = null is writable
665 # The label at the end of the property
666 var returnlabel
: nullable String = null is writable
670 # Return a shortened version of the location with `"{file}:{line_start}"`
671 fun short_location
: String do
673 if file
== null then return "<no file>:{line_start}"
674 return "{file.filename.escape_to_c}:{line_start}"
679 # Return the Java type associated to a given Nit static type
680 fun java_type
: String do return "RTVal"
682 # Is the associated Java type a primitive one?
684 # ENSURE `result == (java_type != "Object")`
685 var is_java_primitive
: Bool is lazy
do return java_type
!= "RTVal"
688 redef class MClassType
690 redef var java_type
is lazy
do
691 if mclass
.name
== "Int" then
693 else if mclass
.name
== "Bool" then
695 else if mclass
.name
== "Char" then
697 else if mclass
.name
== "Float" then
699 else if mclass
.name
== "Byte" then
701 else if mclass
.name
== "NativeString" then
703 else if mclass
.name
== "NativeArray" then
713 private fun rt_name
: String do return "RTClass_{intro.mmodule.jname}_{jname}"
715 # Generate a Java RTClass for a Nit MClass
716 fun compile_to_java
(v
: JavaCompilerVisitor) do
717 v
.add
("public class {rt_name} extends RTClass \{")
718 v
.add
(" protected static RTClass instance;")
719 v
.add
(" private {rt_name}() \{")
720 v
.add
(" this.class_name = \"{name}\
";")
722 compile_type_table
(v
)
724 v
.add
(" public static RTClass get{rt_name}() \{")
725 v
.add
(" if(instance == null) \{")
726 v
.add
(" instance = new {rt_name}();")
728 v
.add
(" return instance;")
733 # Compile the virtual function table for the mclass
734 private fun compile_vft
(v
: JavaCompilerVisitor) do
735 # TODO handle generics
736 if mclass_type
.need_anchor
then return
737 var mclassdefs
= mclass_type
.collect_mclassdefs
(v
.compiler
.mainmodule
).to_a
738 v
.compiler
.mainmodule
.linearize_mclassdefs
(mclassdefs
)
740 var mainmodule
= v
.compiler
.mainmodule
741 for mclassdef
in mclassdefs
.reversed
do
742 for mprop
in mclassdef
.intro_mproperties
do
743 var mpropdef
= mprop
.lookup_first_definition
(mainmodule
, intro
.bound_mtype
)
744 if not mpropdef
isa MMethodDef then continue
745 var rt_name
= mpropdef
.rt_name
746 v
.add
("this.vft.put(\"{mprop.full_name}\
", {rt_name}.get{rt_name}());")
748 # fill super next definitions
749 while mpropdef
.has_supercall
do
750 var prefix
= mpropdef
.full_name
751 mpropdef
= mpropdef
.lookup_next_definition
(mainmodule
, intro
.bound_mtype
)
752 rt_name
= mpropdef
.rt_name
753 v
.add
("this.vft.put(\"{prefix}\
", {rt_name}.get{rt_name}());")
759 # Compile the type table for the MClass
760 fun compile_type_table
(v
: JavaCompilerVisitor) do
761 for pclass
in in_hierarchy
(v
.compiler
.mainmodule
).greaters
do
762 if pclass
== self then
763 v
.add
("supers.put(\"{pclass.jname}\
", this);")
765 v
.add
("supers.put(\"{pclass.jname}\
", {pclass.rt_name}.get{pclass.rt_name}());")
771 redef class MMethodDef
774 private fun rt_name
: String do
775 return "RTMethod_{mclassdef.mmodule.jname}_{mclassdef.mclass.jname}_{mproperty.jname}"
778 # Generate a Java RTMethod for `self`
779 fun compile_to_java
(v
: JavaCompilerVisitor) do
780 v
.add
("public class {rt_name} extends RTMethod \{")
781 v
.add
(" protected static RTMethod instance;")
782 v
.add
(" public static RTMethod get{rt_name}() \{")
783 v
.add
(" if(instance == null) \{")
784 v
.add
(" instance = new {rt_name}();")
786 v
.add
(" return instance;")
789 v
.add
(" public RTVal exec(RTVal[] args) \{")
790 compile_inside_to_java
(v
)
795 # Compile the body of this function
796 fun compile_inside_to_java
(v
: JavaCompilerVisitor) do
798 var modelbuilder
= v
.compiler
.modelbuilder
799 var node
= modelbuilder
.mpropdef2node
(self)
802 # TODO compile abstract
803 v
.info
("NOT YET IMPLEMENTED call to abstract method")
804 v
.add
("return null;")
808 if node
isa APropdef then
809 node
.compile_to_java
(v
, self)
810 else if node
isa AClassdef then
811 # TODO compile attributes
812 v
.info
("NOT YET IMPLEMENTED attribute handling")
813 v
.add
("return null;")
822 # Compile that property definition to java code
823 fun compile_to_java
(v
: JavaCompilerVisitor, mpropdef
: MMethodDef) do
824 v
.info
("NOT YET IMPLEMENTED {class_name}::compile_to_java")
828 redef class AMethPropdef
829 redef fun compile_to_java
(v
, mpropdef
) do
830 # TODO Call the implicit super-init
832 # Compile intern methods
833 if mpropdef
.is_intern
then
834 v
.info
("NOT YET IMPLEMENTED {class_name}::compile_intern")
835 # TODO if compile_intern_to_java(v, mpropdef, arguments) then return
836 v
.add
("return null;")
840 # Compile block if any
841 var n_block
= n_block
842 if n_block
!= null then
850 # Try to compile self as an expression
851 # Do not call this method directly, use `v.expr` instead
852 private fun expr
(v
: JavaCompilerVisitor): nullable RuntimeVariable do
853 v
.info
("NOT YET IMPLEMENTED {class_name}::expr")
857 # Try to compile self as a statement
858 # Do not call this method directly, use `v.stmt` instead
859 private fun stmt
(v
: JavaCompilerVisitor) do expr
(v
)
862 redef class ABlockExpr
865 for e
in self.n_expr
do v
.stmt
(e
)
869 var last
= self.n_expr
.last
870 for e
in self.n_expr
do
871 if e
== last
then break
874 return v
.expr
(last
, null)
878 redef class ASelfExpr
879 redef fun expr
(v
) do return v
.frame
.as(not null).arguments
.first
882 redef class AImplicitSelfExpr
883 redef fun expr
(v
) do return v
.frame
.as(not null).arguments
.first
886 redef class AVardeclExpr
888 var variable
= self.variable
.as(not null)
890 var decl
= v
.variable
(variable
)
892 var i
= v
.expr
(ne
, variable
.declared_type
)
900 return v
.variable
(self.variable
.as(not null))
904 redef class AVarAssignExpr
906 var variable
= self.variable
.as(not null)
907 var i
= v
.expr
(self.n_value
, variable
.declared_type
)
908 v
.assign
(v
.variable
(variable
), i
)
914 redef fun expr
(v
) do return v
.int_instance
(self.value
.as(not null))
917 redef class AByteExpr
918 redef fun expr
(v
) do return v
.byte_instance
(self.value
.as(not null))
921 redef class AFloatExpr
922 redef fun expr
(v
) do return v
.float_instance
("{self.n_float.text}") # FIXME use value, not n_float
925 redef class ACharExpr
926 redef fun expr
(v
) do return v
.char_instance
(self.value
.as(not null))
929 redef class ATrueExpr
930 redef fun expr
(v
) do return v
.bool_instance
(true)
933 redef class AFalseExpr
934 redef fun expr
(v
) do return v
.bool_instance
(false)
937 redef class ANullExpr
938 redef fun expr
(v
) do return v
.null_instance
941 redef class AAbortExpr
942 redef fun stmt
(v
) do v
.add_abort
("Aborted")
945 redef class ADebugTypeExpr
946 redef fun stmt
(v
) do end # do nothing