"{ Package: 'jv:tea/compiler' }"

"{ NameSpace: Smalltalk }"

TCompilerPass subclass:#TTypechecker

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'Languages-Tea-Compiler-Internals'

!

!TTypechecker methodsFor:'visiting'!

visitArgument: anRBVariableNode

    | binding |

    super visitArgument: anRBVariableNode.

    binding := anRBVariableNode binding.

    binding type: (anRBVariableNode typeSpec asType)

    "Created: / 20-09-2015 / 07:19:27 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!TTypechecker methodsFor:'visitor-double dispatching'!

acceptBlockNode: aBlockNode 

    | formalType actualType  |

    super acceptBlockNode: aBlockNode.

    formalType := aBlockNode binding type.

    actualType := aBlockNode body statements last binding type.

    formalType isAutomaticType ifTrue:[ 

        aBlockNode binding returnType: actualType.

    ] ifFalse:[ 

        formalType = actualType ifFalse:[ 

            context reportTypeError: ('Block return type is specified as %1 but actually is %3' bindWith: formalType with: actualType).

        ].

    ].

    "Created: / 23-09-2015 / 16:44:07 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

acceptIfTrueIfFalseNode: node

    | receiverType booleanType |

    receiverType := node receiver binding type.

    booleanType := context environment binding lookupClassBoolean type.

    receiverType = booleanType ifFalse:[ 

        context reportTypeError: 'receiver of ifTrue:ifFalse: special form must be of type tBoolean (is ' , receiverType printString.

    ].

    "Created: / 14-09-2015 / 14:24:50 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 15-09-2015 / 08:29:13 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

acceptIfTrueNode: node

    | receiverType booleanType |

    receiverType := node binding type.

    booleanType := context environment binding lookupClassBoolean.

    receiverType = booleanType ifFalse:[ 

        context reportTypeError: 'receiver of ifTrue: special form must be of type tBoolean (is ' , receiverType printString.

    ].

    "Created: / 14-09-2015 / 14:18:28 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

acceptLiteralNode: aLiteralNode

    | binding value |

    binding := aLiteralNode binding.

    value := binding value.

    value isInteger ifTrue:[ 

        binding type: (context environment binding lookupClassSIntegerW) type.

        ^ self

    ].

    value isBoolean ifTrue:[ 

        binding type: (context environment binding lookupClassBoolean) type.

        ^ self.

    ].

    context reportTypeError: 'Unsupported constant type'.

    "Created: / 20-09-2015 / 07:13:45 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

acceptMessageNode: aMessageNode 

    | receiverType receiverBinding methodBinding |

    super acceptMessageNode: aMessageNode.

    receiverType := aMessageNode receiver binding type.

    receiverType isSimpleType ifTrue:[ 

        receiverBinding := context environment binding lookupClassNamed: receiverType name.

        methodBinding := receiverBinding lookupMethodNamed: aMessageNode selector.

        1 to: aMessageNode arguments size do:[:paramIdx |  

            | actualParamType formalParamType |    

            actualParamType := (aMessageNode arguments at: paramIdx) binding type.

            formalParamType := methodBinding parameterTypes at: paramIdx.

            (actualParamType isSubtypeOf: formalParamType) ifFalse:[ 

                context reportTypeError: ('Type mismatch for parameter %1 (expected %2, got %3)' bindWith: paramIdx with: formalParamType with: actualParamType).

                ^ self.

            ].

        ].

        aMessageNode binding: methodBinding.

        ^ self.

    ].

    self notYetImplemented

    "Created: / 02-09-2015 / 10:34:08 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 14-09-2015 / 14:22:41 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

acceptWhileTrueNode: node

    | receiverType booleanType |

    (node isCascaded not or: [node isFirstCascaded]) ifTrue: [

        self visitNode: node receiver

    ].

    node arguments do: [:each | self visitNode: each].

    receiverType := node receiver binding type.

    booleanType := context environment binding lookupClassBoolean type.

    receiverType = booleanType ifFalse:[ 

        context reportTypeError: 'receiver of ifTrue:ifFalse: special form must be of type tBoolean (is ' , receiverType printString.

    ].

    "Created: / 23-09-2015 / 14:06:22 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 23-09-2015 / 16:46:57 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!TTypechecker class methodsFor:'documentation'!

version_HG

    ^ '$Changeset: <not expanded> $'

! !