MisterChaos69/MiniJavaCompiler
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add: inject default constructor

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This commit is contained in:
Christian Brier 2024-05-15 11:45:41 +02:00
parent 207fb5c5f3
commit e572975bda
1 changed files with 10 additions and 3 deletions
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13
src/ByteCode/ClassFile/Generator.hs
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@ -94,6 +94,11 @@ methodDescriptor (MethodDeclaration returntype _ parameters _) = let
++ ")"
++ methodParameterDescriptor returntype
injectDefaultConstructor :: [MethodDeclaration] -> [MethodDeclaration]
injectDefaultConstructor pre
| any (\(MethodDeclaration _ name _ _) -> name == "<init>") pre = pre
| otherwise = pre ++ [MethodDeclaration "void" "<init>" [] (TypedStatement "void" (Block []))]
classBuilder :: ClassFileBuilder Class
classBuilder (Class name methods fields) _ = let
@ -117,9 +122,11 @@ classBuilder (Class name methods fields) _ = let
attributes = []
}
methodsWithInjectedConstructor = injectDefaultConstructor methods
classFileWithFields = foldr fieldBuilder nakedClassFile fields
classFileWithMethods = foldr methodBuilder classFileWithFields methods
classFileWithAssembledMethods = foldr methodAssembler classFileWithMethods methods
classFileWithMethods = foldr methodBuilder classFileWithFields methodsWithInjectedConstructor
classFileWithAssembledMethods = foldr methodAssembler classFileWithMethods methodsWithInjectedConstructor
in
classFileWithAssembledMethods
@ -232,7 +239,7 @@ assembleMethod (constants, ops, lvars) (MethodDeclaration _ name _ (TypedStateme
init_ops = [Opaload 0]
in
(constants_a, init_ops ++ ops_a, lvars_a)
assembleMethod _ (MethodDeclaration _ _ _ stmt) = error ("Block expected for method body, got: " ++ show stmt)
assembleMethod _ (MethodDeclaration _ _ _ stmt) = error ("Block expected for method body, got: " ++ show stmt)
assembleStatement :: Assembler Statement
assembleStatement (constants, ops, lvars) (TypedStatement stype (Return expr)) = case expr of