---
theme: dracula
title: Compiler ULTIMATE
# apply unocss classes to the current slide
class: text-center
# https://sli.dev/custom/highlighters.html
highlighter: shiki
# https://sli.dev/guide/drawing
drawings:
persist: false
# slide transition: https://sli.dev/guide/animations#slide-transitions
transition: slide-left
# enable MDC Syntax: https://sli.dev/guide/syntax#mdc-syntax
mdc: true
plantUmlServer: 'https://www.plantuml.com/plantuml'
---
# Compiler ULTIMATE
Kein Weg ist mir im Schlitten je zu weit.
---
# Parser
**Besonderheiten und Änderungen zu Java:**
- Pro Datei nur eine Klasse, mehrer Dateien einlesen
- Keine Accessmodifier
- print statt System.out.println
- i++ eingeschränkt
- Kein ++i
- Zugriff af Felder nur mit this
- Logische Statements Klammern, sonst von links nach rechts
- Recipient
- Fehlermeldungen werden gesammelt
---
## AST
```plantuml
@startuml
top to bottom direction
entity Assignment << record >> {
+ Assignment(FieldVarAccess, Expression):
+ value(): Expression
+ location(): FieldVarAccess
}
entity Binary << record >> {
+ Binary(Expression, Operator, Expression):
+ op(): Operator
+ left(): Expression
+ right(): Expression
}
entity Block << record >> {
+ Block(List):
+ stmts(): List
}
entity BoolLiteral << record >> {
+ BoolLiteral(Boolean):
+ value(): Boolean
}
entity Break << record >> {
+ Break():
}
entity CharLiteral << record >> {
+ CharLiteral(char):
+ value(): char
}
entity Class << record >> {
+ Class(String, Block, List, List, List):
+ Class(String, List, List, List):
+ mainmeth(): Block
+ classname(): String
+ methods(): List
+ constructors(): List
+ fieldDeclarations(): List
}
entity Constructor << record >> {
+ Constructor(String, List, Block):
+ params(): List
+ block(): Block
+ className(): String
}
entity Continue << record >> {
+ Continue():
}
entity Declaration << record >> {
+ Declaration(String, Type):
+ type(): Type
+ name(): String
}
entity DoWhile << record >> {
+ DoWhile(Block, Expression):
+ cond(): Expression
+ block(): Block
}
interface Expression << interface >>
entity FieldVarAccess << record >> {
+ FieldVarAccess(Boolean, Expression, String):
+ recursiveOwnerChain(): Expression
+ field(): Boolean
+ id(): String
}
entity For << record >> {
+ For(Assignment, Expression, Assignment, Block):
+ block(): Block
+ cond(): Expression
+ inc(): Assignment
+ assign(): Assignment
}
entity IfElse << record >> {
+ IfElse(Expression, Block, Block):
+ elseBlock(): Block
+ cond(): Expression
+ ifBlock(): Block
}
entity IntLiteral << record >> {
+ IntLiteral(Integer):
+ value(): Integer
}
entity Method << record >> {
+ Method(Type, String, List, Block):
+ block(): Block
+ methodName(): String
+ type(): Type
+ params(): List
}
entity MethodCall << record >> {
+ MethodCall(FieldVarAccess, List):
+ recipient(): FieldVarAccess
+ args(): List
}
entity New << record >> {
+ New(Type, List):
+ type(): Type
+ args(): List
}
interface Node << interface >>
enum Operator << enumeration >> {
+ Operator():
+ values(): Operator[]
+ valueOf(String): Operator
}
entity Parameter << record >> {
+ Parameter(String, Type):
+ type(): Type
+ name(): String
}
entity Print << record >> {
+ Print(Expression):
+ value(): Expression
}
entity Program << record >> {
+ Program(List):
+ classes(): List
}
entity Return << record >> {
+ Return(Expression):
+ ret(): Expression
}
interface Statement << interface >>
entity Unary << record >> {
+ Unary(UnaryOperator, Expression):
+ right(): Expression
+ op(): UnaryOperator
}
enum UnaryOperator << enumeration >> {
+ UnaryOperator():
+ values(): UnaryOperator[]
+ valueOf(String): UnaryOperator
}
entity While << record >> {
+ While(Expression, Block):
+ cond(): Expression
+ block(): Block
}
Assignment -[#008200,dashed]u-^ Statement
Binary -[#008200,dashed]u-^ Expression
Block -[#008200,dashed]u-^ Node
BoolLiteral -[#008200,dashed]u-^ Expression
Break -[#008200,dashed]u-^ Statement
CharLiteral -[#008200,dashed]u-^ Expression
Class -[#008200,dashed]u-^ Node
Constructor -[#008200,dashed]u-^ Node
Continue -[#008200,dashed]u-^ Statement
Declaration -[#008200,dashed]u-^ Statement
DoWhile -[#008200,dashed]u-^ Statement
Expression -[#008200,plain]u-^ Node
FieldVarAccess -[#008200,dashed]u-^ Expression
For -[#008200,dashed]u-^ Statement
IfElse -[#008200,dashed]u-^ Statement
IntLiteral -[#008200,dashed]u-^ Expression
Method -[#008200,dashed]u-^ Node
MethodCall -[#008200,dashed]u-^ Expression
MethodCall -[#008200,dashed]u-^ Statement
New -[#008200,dashed]u-^ Expression
New -[#008200,dashed]u-^ Statement
Parameter -[#008200,dashed]u-^ Node
Print -[#008200,dashed]u-^ Statement
Program -[#008200,dashed]u-^ Node
Return -[#008200,dashed]u-^ Statement
Statement -[#008200,plain]u-^ Node
Unary -[#008200,dashed]u-^ Expression
While -[#008200,dashed]u-^ Statement
@enduml
```
## TypedAST
```plantuml
@startuml
!theme plain
top to bottom direction
skinparam linetype ortho
class TypedAssignment {
+ TypedAssignment(TypedExpression, TypedFieldVarAccess, Type):
+ TypedAssignment(TypedProgram, Assignment):
- location: TypedFieldVarAccess
- type: Type
- value: TypedExpression
+ toString(): String
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
- convertToTypedAssignment(TypedProgram, Assignment): void
+ typeCheck(TypedProgram): Type
- getTypeFromConstructorOrField(TypedConstructor, String, TypedClass): Type
- getOwnerChain(MethodContext): void
- getTypeLeft(TypedProgram): Type
- getTypeFromMethodOrField(TypedMethod, String, TypedClass): Type
+ codeGen(MethodContext): void
location: TypedFieldVarAccess
value: TypedExpression
type: Type
}
class TypedBinary {
+ TypedBinary(TypedExpression, Operator, TypedExpression, Type):
+ TypedBinary():
+ TypedBinary(TypedProgram, Binary):
- left: TypedExpression
- right: TypedExpression
- type: Type
- op: Operator
+ equals(Object): boolean
+ hashCode(): int
# canEqual(Object): boolean
+ toString(): String
+ typeCheck(TypedProgram): Type
+ codeGen(MethodContext): void
- convertToTypedBinary(TypedProgram, Binary): void
left: TypedExpression
type: Type
op: Operator
right: TypedExpression
}
class TypedBlock {
+ TypedBlock(List, List, Type):
+ TypedBlock():
+ TypedBlock(List, List):
+ TypedBlock(TypedProgram, Block):
- type: Type
- vars: List
- stmts: List
+ toString(): String
+ equals(Object): boolean
+ hashCode(): int
# canEqual(Object): boolean
- clearLocalVariable(TypedProgram): void
- convertToTypedBlock(TypedProgram, Block): void
+ typeCheck(TypedProgram): Type
+ codeGen(MethodContext): void
stmts: List
vars: List
type: Type
}
class TypedBoolLiteral {
+ TypedBoolLiteral(Boolean, Type):
+ TypedBoolLiteral():
+ TypedBoolLiteral(BoolLiteral):
- type: Type
- value: Boolean
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
+ codeGen(MethodContext): void
- convertToTypedBoolLiteral(BoolLiteral): void
+ typeCheck(TypedProgram): Type
value: Boolean
type: Type
}
class TypedBreak {
+ TypedBreak():
- type: Type
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
+ typeCheck(TypedProgram): Type
+ codeGen(MethodContext): void
type: Type
}
class TypedCharLiteral {
+ TypedCharLiteral(char, Type):
+ TypedCharLiteral(CharLiteral):
- value: char
- type: Type
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
+ typeCheck(TypedProgram): Type
- convertToCharLiteral(CharLiteral): void
+ codeGen(MethodContext): void
value: char
type: Type
}
class TypedClass {
+ TypedClass(String, List, List, List, TypedMain, TypedMethod, TypedConstructor, Type, boolean):
+ TypedClass():
+ TypedClass(String, List, List, List, TypedMain, TypedMethod, TypedConstructor, Type):
+ TypedClass(Class):
- typedMethods: List
- typedConstructors: List
- currentMethod: TypedMethod
- isMainCurrentMethod: boolean
- className: String
- typedMain: TypedMain
- type: Type
- currentConstructor: TypedConstructor
- typedDeclarations: List
+ isParameterNameInCurrentConstructor(String): boolean
+ codeGenClassWriter(): ClassWriter
+ toString(): String
+ hashCode(): int
+ equals(Object): boolean
# canEqual(Object): boolean
+ isParameterWitNameInCurrentMethod(String): boolean
+ exitCurrentConstructor(): void
+ isMethodOfCurrentClass(String): boolean
+ typeCheck(TypedProgram): Type
+ getFieldType(String): Type
+ getMethodType(String): Type
+ getParameterTypeInCurrentConstructor(String): Type
+ enterCurrentMethod(TypedMethod): void
+ getParameterTypeInCurrentMethod(String): Type
+ enterCurrentConstructor(TypedConstructor): void
+ codeGen(): byte[]
+ covertBlocksOfConstructorsAndMethods(TypedProgram, Class): void
+ convertMethodsAndConstructorsAndFields(TypedProgram, Class): void
+ isThereField(String): boolean
+ isParameterWitNameInCurrentConstructor(String): boolean
+ exitCurrentMethod(): void
+ checkMethodExists(TypedMethod): void
currentConstructorPresent: boolean
typedConstructors: List
currentMethod: TypedMethod
typedMain: TypedMain
type: Type
typedDeclarations: List
currentConstructor: TypedConstructor
className: String
typedMethods: List
currentMainMethodPresent: boolean
isMainCurrentMethod: boolean
currentMethodPresent: boolean
}
class TypedConstructor {
+ TypedConstructor(String, List, TypedBlock, Type, List):
+ TypedConstructor():
+ TypedConstructor(String, List, TypedBlock):
+ TypedConstructor(Constructor, String):
- localVariables: List
- name: String
- typedBlock: TypedBlock
- type: Type
- typedParameters: List
+ toString(): String
# canEqual(Object): boolean
+ hashCode(): int
+ equals(Object): boolean
- checkIfParameterExists(String): void
+ deleteLocalVariableInConstructor(String): void
+ isLocalVariablePresent(String): boolean
- convertToTypedConstructor(Constructor, String): void
+ getLocalVariableType(String): Type
- convertToTypedParameter(List): void
+ isParameterPresent(String): boolean
+ typeCheck(TypedProgram): Type
+ convertToBlock(TypedProgram, Constructor): void
+ codeGen(ClassContext): void
+ isLocalVariableInConstructor(String): boolean
localVariables: List
name: String
typedParameters: List
type: Type
typedBlock: TypedBlock
}
class TypedContinue {
+ TypedContinue():
- type: Type
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
+ typeCheck(TypedProgram): Type
+ codeGen(MethodContext): void
type: Type
}
class TypedDeclaration {
+ TypedDeclaration(TypedProgram, Declaration):
+ TypedDeclaration(String, Type):
+ TypedDeclaration():
- name: String
- type: Type
+ equals(Object): boolean
+ hashCode(): int
+ toString(): String
+ typeCheck(TypedProgram): Type
- convertToTypedDeclaration(TypedProgram, Declaration): void
+ codeGen(ClassWriter): void
name: String
type: Type
}
class TypedDoWhile {
+ TypedDoWhile(TypedBlock, TypedExpression, Type):
+ TypedDoWhile(TypedProgram, DoWhile):
- cond: TypedExpression
- type: Type
- typedBlock: TypedBlock
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
- convertToTypedDoWhile(TypedProgram, DoWhile): void
+ typeCheck(TypedProgram): Type
+ codeGen(MethodContext): void
cond: TypedExpression
typedBlock: TypedBlock
type: Type
}
interface TypedExpression << interface >> {
+ codeGen(MethodContext): void
type: Type
}
class TypedExpressionUtil {
+ TypedExpressionUtil():
+ convertExpression(TypedProgram, Expression): TypedExpression
}
class TypedFieldVarAccess {
+ TypedFieldVarAccess(Boolean, TypedExpression, String, Type):
+ TypedFieldVarAccess():
+ TypedFieldVarAccess(TypedProgram, FieldVarAccess):
- field: Boolean
- type: Type
- name: String
- recursiveOwnerChain: TypedExpression
# canEqual(Object): boolean
+ toString(): String
+ equals(Object): boolean
+ hashCode(): int
+ codeGen(MethodContext): void
- checkFieldOrMethodOrRecursiveType(TypedProgram): Type
+ typeCheck(TypedProgram): Type
- checkMethodVariableType(TypedProgram): Type
- convertToTypedFieldVarAccess(TypedProgram, FieldVarAccess): void
- checkVariableType(TypedProgram): Type
- checkConstructorVariableType(TypedProgram): Type
- checkFieldOrMethodType(TypedProgram): Type
- checkTypeField(TypedProgram): Type
name: String
type: Type
recursiveOwnerChain: TypedExpression
field: Boolean
}
class TypedFor {
+ TypedFor():
+ TypedFor(TypedAssignment, TypedExpression, TypedAssignment, TypedBlock, Type):
+ TypedFor(TypedProgram, For):
- assign: TypedAssignment
- typedBlock: TypedBlock
- type: Type
- cond: TypedExpression
- inc: TypedAssignment
+ hashCode(): int
# canEqual(Object): boolean
+ toString(): String
+ equals(Object): boolean
+ codeGen(MethodContext): void
- convertToTypedFor(TypedProgram, For): void
+ typeCheck(TypedProgram): Type
inc: TypedAssignment
type: Type
cond: TypedExpression
typedBlock: TypedBlock
assign: TypedAssignment
}
class TypedIfElse {
+ TypedIfElse(TypedExpression, TypedBlock, TypedBlock, Type):
+ TypedIfElse():
+ TypedIfElse(TypedProgram, IfElse):
- typedCon: TypedExpression
- elseTypedBlock: TypedBlock
- ifTypedBlock: TypedBlock
- type: Type
+ toString(): String
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ codeGen(MethodContext): void
- convertToTypedIfElse(TypedProgram, IfElse): void
+ typeCheck(TypedProgram): Type
elseTypedBlock: TypedBlock
type: Type
ifTypedBlock: TypedBlock
typedCon: TypedExpression
}
class TypedIntLiteral {
+ TypedIntLiteral(Integer, Type):
+ TypedIntLiteral():
+ TypedIntLiteral(Integer):
+ TypedIntLiteral(IntLiteral):
- value: Integer
- type: Type
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
+ codeGen(MethodContext): void
+ typeCheck(TypedProgram): Type
- convertToTypedIntLiteral(IntLiteral): void
value: Integer
type: Type
}
class TypedLocalVariable {
+ TypedLocalVariable(TypedProgram, Declaration):
+ TypedLocalVariable(String, Type):
+ TypedLocalVariable():
- type: Type
- name: String
+ typeCheck(TypedProgram): Type
+ equals(Object): boolean
+ hashCode(): int
+ toString(): String
+ codeGen(MethodVisitor, MethodContext): void
- convertToTypedLocalVariable(Declaration): void
name: String
type: Type
}
class TypedMain {
+ TypedMain(Type, TypedMethod):
+ TypedMain():
- type: Type
- typedMethod: TypedMethod
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
+ codeGen(ClassContext): void
+ typeCheck(TypedProgram): Type
+ convertToTypedMethod(TypedProgram, Class): void
typedMethod: TypedMethod
type: Type
}
class TypedMethod {
+ TypedMethod(String, Type, List, List, TypedBlock):
+ TypedMethod():
+ TypedMethod(TypedProgram, Method):
- returnType: Type
- typedBlock: TypedBlock
- localVariables: List
- name: String
- typedParameters: List
+ toString(): String
- convertToTypedMethod(TypedProgram, Method): void
+ equals(Object): boolean
+ codeGen(ClassContext): void
+ codeGenMain(ClassContext): void
- convertToTypedParameter(List): void
- checkReturn(List): boolean
+ isLocalVariablePresent(String): boolean
+ isParameterPresent(String): boolean
+ deleteLocalVariableInMethod(String): void
+ convertToTypedBlock(TypedProgram, Method): void
+ isLocalVariableInMethod(String): boolean
+ typeCheck(TypedProgram): Type
+ getLocalVariableType(String): Type
+ checkIfParameterExists(String): void
localVariables: List
name: String
typedParameters: List
returnType: Type
typedBlock: TypedBlock
}
class TypedMethodCall {
+ TypedMethodCall():
+ TypedMethodCall(TypedFieldVarAccess, List, Type):
+ TypedMethodCall(TypedProgram, MethodCall):
- recipient: TypedFieldVarAccess
- args: List
- type: Type
+ hashCode(): int
+ equals(Object): boolean
+ toString(): String
# canEqual(Object): boolean
+ typeCheck(TypedProgram): Type
+ codeGen(MethodContext): void
- getOwnerChain(MethodContext): void
+ findMatchingMethod(TypedClass, String): Optional
- convertToTypedMethodCall(TypedProgram, MethodCall): void
recipient: TypedFieldVarAccess
args: List
type: Type
}
class TypedNew {
+ TypedNew(Type, List):
+ TypedNew(TypedProgram, New):
- type: Type
- args: List
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
+ codeGen(MethodContext): void
- convertToTypedNew(TypedProgram, New): void
- findMatchingConstructorType(TypedProgram, List): Type
+ typeCheck(TypedProgram): Type
args: List
type: Type
}
interface TypedNode << interface >> {
+ typeCheck(TypedProgram): Type
}
class TypedParameter {
+ TypedParameter(String, Type):
+ TypedParameter(Parameter):
- paraName: String
- type: Type
+ toString(): String
+ typeCheck(TypedProgram): Type
+ equals(Object): boolean
- convertToTypedParameter(Parameter): void
paraName: String
type: Type
}
class TypedPrint {
+ TypedPrint(TypedProgram, Print):
+ TypedPrint(TypedExpression, Type):
+ codeGen(MethodContext): void
+ typeCheck(TypedProgram): Type
}
class TypedProgram {
+ TypedProgram(List, TypedClass):
+ TypedProgram(Program):
- typedClasses: List
- currentClass: TypedClass
+ isTypedClassPresent(String): boolean
+ toString(): String
+ getTypeOfFieldNameInClass(String, String): Type
+ getTypedClass(String): TypedClass
+ startConversion(Program): void
- exitCurrentClass(): void
+ equals(Object): boolean
+ isClassWithNamePresent(String): boolean
+ getTypeOfFieldOrMethodNameInClass(String, String): Type
- enterCurrentClass(TypedClass): void
currentClass: TypedClass
typedClasses: List
}
class TypedReturn {
+ TypedReturn():
+ TypedReturn(TypedExpression, Type):
+ TypedReturn(TypedProgram, Return):
- ret: TypedExpression
- type: Type
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
+ codeGen(MethodContext): void
+ typeCheck(TypedProgram): Type
- convertToTypedReturn(TypedProgram, Return): void
ret: TypedExpression
type: Type
}
interface TypedStatement << interface >> {
+ codeGen(MethodContext): void
}
class TypedUnary {
+ TypedUnary(UnaryOperator, TypedExpression, Type):
+ TypedUnary(TypedProgram, Unary):
- type: Type
- op: UnaryOperator
- right: TypedExpression
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
+ typeCheck(TypedProgram): Type
- convertToTypedUnary(TypedProgram, Unary): void
+ codeGen(MethodContext): void
right: TypedExpression
op: UnaryOperator
type: Type
}
class TypedWhile {
+ TypedWhile(TypedExpression, TypedBlock, Type):
+ TypedWhile(TypedProgram, While):
- type: Type
- cond: TypedExpression
- typedBlock: TypedBlock
+ equals(Object): boolean
# canEqual(Object): boolean
+ hashCode(): int
+ toString(): String
+ codeGen(MethodContext): void
+ typeCheck(TypedProgram): Type
- convertToTypedWhile(TypedProgram, While): void
cond: TypedExpression
typedBlock: TypedBlock
type: Type
}
TypedAssignment -[#008200,dashed]u-^ TypedStatement
TypedBinary -[#008200,dashed]u-^ TypedExpression
TypedBlock -[#008200,dashed]u-^ TypedNode
TypedBoolLiteral -[#008200,dashed]u-^ TypedExpression
TypedBreak -[#008200,dashed]u-^ TypedStatement
TypedCharLiteral -[#008200,dashed]u-^ TypedExpression
TypedClass -[#008200,dashed]u-^ TypedNode
TypedConstructor -[#008200,dashed]u-^ TypedNode
TypedContinue -[#008200,dashed]u-^ TypedStatement
TypedDeclaration -[#008200,dashed]u-^ TypedNode
TypedDoWhile -[#008200,dashed]u-^ TypedStatement
TypedExpression -[#008200,plain]u-^ TypedNode
TypedFieldVarAccess -[#008200,dashed]u-^ TypedExpression
TypedFor -[#008200,dashed]u-^ TypedStatement
TypedIfElse -[#008200,dashed]u-^ TypedStatement
TypedIntLiteral -[#008200,dashed]u-^ TypedExpression
TypedLocalVariable -[#008200,dashed]u-^ TypedNode
TypedMain -[#008200,dashed]u-^ TypedNode
TypedMethod -[#008200,dashed]u-^ TypedNode
TypedMethodCall -[#008200,dashed]u-^ TypedExpression
TypedMethodCall -[#008200,dashed]u-^ TypedStatement
TypedNew -[#008200,dashed]u-^ TypedExpression
TypedNew -[#008200,dashed]u-^ TypedStatement
TypedParameter -[#008200,dashed]u-^ TypedNode
TypedPrint -[#008200,dashed]u-^ TypedStatement
TypedReturn -[#008200,dashed]u-^ TypedStatement
TypedStatement -[#008200,plain]u-^ TypedNode
TypedUnary -[#008200,dashed]u-^ TypedExpression
TypedWhile -[#008200,dashed]u-^ TypedStatement
@enduml
```
---
# Grobe TypedAST Struktur
```plantuml
@startuml
!theme plain
left to right direction
skinparam linetype ortho
interface TypedExpression << interface >> {
+ codeGen(MethodContext): void
type: Type
}
interface TypedNode << interface >> {
+ typeCheck(TypedProgram): Type
}
interface TypedStatement << interface >> {
+ codeGen(MethodContext): void
}
class TypedClass{
+ typeCheck(TypedProgram): Type
}
class TypedWhile{
+ typeCheck(TypedProgram): Type
}
class TypedBinary{
+ typeCheck(TypedProgram): Type
}
TypedExpression -[#008200,plain]r-^ TypedNode
TypedStatement -[#008200,plain]l-^ TypedNode
TypedWhile -[#008200,dashed]-^ TypedStatement
TypedClass -[#008200,dashed]-^ TypedNode
TypedBinary -[#008200,dashed]-^ TypedExpression
@enduml
```
---
# Phasen der Typisierung
- Initisialisierungsphase
- Programm -> Klassen (Name, Feld-Variablen, Methoden, Konstruktoren)
- Konvertierungsphase
- Überführung von untypisierten AST zu typisierten AST
- TypeCheck-Phase
- Semantische Überprüfung
- Ausführung von Blöcken
---
## Konvertierung von untypisierten AST zu typisierten AST
```java
public class TypedDeclaration implements TypedNode {
private String name;
private Type type;
...
private void convertToTypedDeclaration(Declaration declaration) {
name = declaration.name();
type = declaration.type();
}
```
---
# TypeCheck von While-Statement
```java
public class TypedWhile implements TypedStatement {
private TypedExpression cond;
private TypedBlock typedBlock;
private Type type;
...
@Override
public Type typeCheck(TypedProgram typedProgram) {
if (cond.typeCheck(typedProgram) != Type.BOOL) {
throw new InvalidWhileConditionException();
}
type = typedBlock.typeCheck(typedProgram);
return type;
}
}
```
---
# Speichern von lokalen Variablen
- Methoden und Konstruktoren haben jeweils eine Liste von lokalen Variablen
```java
public int calculateResult(boolean isMultiple, int x, int y) {
int resultat = 0;// add resultat to list
if(isMultiple) {
int a = x * y;// add a to list
resultat = a;
}// remove a from list
else {
int b = x + y;// add b to list
resultat = b;
} // remove b from list
return resultat;
} // clear list
```
---
# Code Generierung
- Nutzung von ASM
- Dynamische Bindung/Polymorphie
```java
public class TypedWhile implements TypedStatement {
...
@Override
public void codeGen(MethodContext ctx) {
Label loopStart = new Label();
Label loopEnd = new Label();
ctx.getBreakLabels().push(loopEnd);
ctx.getContinueLabels().push(loopStart);
ctx.getMv().visitLabel(loopStart);
cond.codeGen(ctx);
ctx.getMv().visitJumpInsn(Opcodes.IFEQ, loopEnd);
ctx.popStack();
typedBlock.codeGen(ctx);
ctx.getMv().visitJumpInsn(Opcodes.GOTO, loopStart);
ctx.getMv().visitLabel(loopEnd);
ctx.getContinueLabels().pop();
ctx.getBreakLabels().pop();
}
}
```
---
transition: none
---
# Code Generierung
- Nutzung von ASM
- Dynamische Bindung/Polymorphie
```java
public class TypedIntLiteral implements TypedExpression {
...
@Override
public void codeGen(MethodContext ctx) {
if (value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE) {
ctx.getMv().visitIntInsn(Opcodes.BIPUSH, value);
} else if (value >= Short.MIN_VALUE && value <= Short.MAX_VALUE) {
ctx.getMv().visitIntInsn(Opcodes.SIPUSH, value);
} else {
ctx.getMv().visitLdcInsn(value);
}
ctx.pushInstantToStack();
}
}
```
---
## Context Klassen für Class und Method
```plantuml
@startuml
top to bottom direction
skinparam linetype ortho
class ClassContext {
+ ClassContext(String, ClassWriter):
- name: String
- cw: ClassWriter
- type: Type
+ hashCode(): int
+ toString(): String
}
class MethodContext {
+ MethodContext(ClassContext, MethodVisitor, Type):
- variableIndex: Map
- mv: MethodVisitor
- stack: Deque
- returnType: Type
- breakLabels: Deque