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-rw-r--r--heat/TypeCheckSimp.java1097
1 files changed, 0 insertions, 1097 deletions
diff --git a/heat/TypeCheckSimp.java b/heat/TypeCheckSimp.java
deleted file mode 100644
index 99fa187..0000000
--- a/heat/TypeCheckSimp.java
+++ /dev/null
@@ -1,1097 +0,0 @@
-package typecheck;
-
-import syntaxtree.*;
-import visitor.*;
-import st.*;
-import misc.*;
-import java.util.*;
-
-/**
- * Provides default methods which visit each node in the tree in depth-first
- * order. Your visitors may extend this class.
- */
-public class TypeCheckSimp extends GJDepthFirst<TypeInstance,SymbolTable> {
-
- private int offset;
-
- private void printNode(Node n, SymbolTable symt, boolean enter, TypeEnum consensus) {
- String str = "";
- for (int i=0; i < this.offset; ++i)
- str += ".";
- if (enter)
- str += "Visiting ";
- else
- str += "Leaving ";
- str += "n.getClass().getSimpleName()";
- if (!enter) {
- if (consensus == TypeEnum.ERROR)
- str += " did not type check.";
- else
- str += String.format(" found type %s", consensus);
- }
- MinimalLogger.info(str);
- }
-
- public TypeInstance visit(NodeList n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = new TypeInstance(null, TypeEnum.CHECK);
- int _count=0;
- for ( Enumeration<Node> e = n.elements(); e.hasMoreElements(); ) {
- TypeInstance node = e.nextElement().accept(this,symt);
- e.nextElement().accept(this,symt);
- if (node.getType() == TypeEnum.ERROR)
- ret = node;
- _count++;
- }
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- public TypeInstance visit(NodeListOptional n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret;
- if ( n.present() ) {
- ret = new TypeInstance(null, TypeEnum.CHECK);
- int _count=0;
- for ( Enumeration<Node> e = n.elements(); e.hasMoreElements(); ) {
- TypeInstance node = e.nextElement().accept(this,symt);
- if (node.getType() == TypeEnum.ERROR)
- ret = node;
- _count++;
- }
- }
- else
- ret = new TypeInstance(null, TypeEnum.CHECK);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- // FIXME
- public TypeInstance visit(NodeOptional n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret;
-
- if ( n.present() )
- ret = n.node.accept(this,symt);
- else
- ret = new TypeInstance(null, TypeEnum.CHECK);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- public TypeInstance visit(NodeSequence n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = new TypeInstance(null, TypeEnum.CHECK);
- int _count=0;
- for ( Enumeration<Node> e = n.elements(); e.hasMoreElements(); ) {
- TypeInstance node = e.nextElement().accept(this,symt);
- if (node.getType() == TypeEnum.ERROR)
- ret = node;
- _count++;
- }
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- public TypeInstance visit(NodeToken n, SymbolTable symt) {
- // A fixed string token. '⌣'
- String str = "";
- for (int i=0; i < this.offset; ++i)
- str += ".";
- MinimalLogger.info(String.format("%sLeaving %s => %s",
- str,
- n.getClass().getSimpleName(),
- n.toString()));
- return null;
- }
-
- //
- // User-generated visitor methods below
- //
-
- /**
- * f0 -> MainClass()
- * f1 -> ( TypeDeclaration() )*
- * f2 -> <EOF>
- */
- public TypeInstance visit(Goal n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- n.f2.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> "class"
- * f1 -> Identifier()
- * f2 -> "{"
- * f3 -> "public"
- * f4 -> "static"
- * f5 -> "void"
- * f6 -> "main"
- * f7 -> "("
- * f8 -> "String"
- * f9 -> "["
- * f10 -> "]"
- * f11 -> Identifier()
- * f12 -> ")"
- * f13 -> "{"
- * f14 -> ( VarDeclaration() )*
- * f15 -> ( Statement() )*
- * f16 -> "}"
- * f17 -> "}"
- */
- public TypeInstance visit(MainClass n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- TypeInstance name = n.f1.accept(this, symt);
- n.f2.accept(this, symt);
- n.f3.accept(this, symt);
- n.f4.accept(this, symt);
- n.f5.accept(this, symt);
- n.f6.accept(this, symt);
- n.f7.accept(this, symt);
- n.f8.accept(this, symt);
- n.f9.accept(this, symt);
- n.f10.accept(this, symt);
- // TypeInstance args = n.f11.accept(this, symt);
- n.f12.accept(this, symt);
- n.f13.accept(this, symt);
- TypeInstance var_dec = n.f14.accept(this, symt);
- TypeInstance stmt = n.f15.accept(this, symt);
- n.f16.accept(this, symt);
- n.f17.accept(this, symt);
-
- this.printNode(n, symt, false, stmt.getType());
- --this.offset;
- return stmt;
- }
-
- /**
- * f0 -> ClassDeclaration()
- * | ClassExtendsDeclaration()
- */
- public TypeInstance visit(TypeDeclaration n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = n.f0.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> "class"
- * f1 -> Identifier()
- * f2 -> "{"
- * f3 -> ( VarDeclaration() )*
- * f4 -> ( MethodDeclaration() )*
- * f5 -> "}"
- */
- public TypeInstance visit(ClassDeclaration n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- TypeInstance id = n.f1.accept(this, symt);
- n.f2.accept(this, symt);
- TypeInstance vars = n.f3.accept(this, symt);
- TypeInstance mtds = n.f4.accept(this, symt);
- n.f5.accept(this, symt);
- TypeInstance ret = (vars.hasChecked() &&
- mtds.hasChecked()) ?
- new TypeInstance(null, TypeEnum.CHECK) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> "class"
- * f1 -> Identifier()
- * f2 -> "extends"
- * f3 -> Identifier()
- * f4 -> "{"
- * f5 -> ( VarDeclaration() )*
- * f6 -> ( MethodDeclaration() )*
- * f7 -> "}"
- */
- public TypeInstance visit(ClassExtendsDeclaration n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- TypeInstance id = n.f1.accept(this, symt);
- n.f2.accept(this, symt);
- TypeInstance ext = n.f3.accept(this, symt);
- n.f4.accept(this, symt);
- TypeInstance vars = n.f5.accept(this, symt);
- TypeInstance mehs = n.f6.accept(this, symt);
- n.f7.accept(this, symt);
- TypeInstance ret = (id.getType() == TypeEnum.classname &&
- vars.hasChecked() &&
- mehs.hasChecked()) ?
- new TypeInstance(null, TypeEnum.CHECK) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- // FIXME (this may be ST-only)
- /**
- * f0 -> Type()
- * f1 -> Identifier()
- * f2 -> ";"
- */
- public TypeInstance visit(VarDeclaration n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- n.f2.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- // FIXME
- /**
- * [7.5]: Parameters identifiers are distinct, local vars are distinct,
- * (vars in scope?), all statements type check
- *
- * f0 -> "public"
- * f1 -> Type()
- * f2 -> Identifier()
- * f3 -> "("
- * f4 -> ( FormalParameterList() )?
- * f5 -> ")"
- * f6 -> "{"
- * f7 -> ( VarDeclaration() )*
- * f8 -> ( Statement() )*
- * f9 -> "return"
- * f10 -> Expression()
- * f11 -> ";"
- * f12 -> "}"
- */
- public TypeInstance visit(MethodDeclaration n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- MethodInstance self = symt.getMethod(n.f2.f0.tokenImage);
- n.f0.accept(this, symt);
- TypeInstance ret_type = n.f1.accept(this, symt);
- n.f2.accept(this, symt);
- n.f3.accept(this, symt);
- n.f4.accept(this, symt);
- n.f5.accept(this, symt);
- n.f6.accept(this, symt);
- n.f7.accept(this, symt);
- TypeInstance stmt = n.f8.accept(this, symt);
- n.f9.accept(this, symt);
- TypeInstance rtrn = n.f10.accept(this, symt);
- n.f11.accept(this, symt);
- n.f12.accept(this, symt);
- TypeInstance ret = (self.getReturn() == rtrn.getType() && // FIXME I am checking that the rtrn matches the method's declared return type. Is this in the document?
- stmt.hasChecked()) ?
- new TypeInstance(null, TypeEnum.CHECK) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> FormalParameter()
- * f1 -> ( FormalParameterRest() )*
- */
- public TypeInstance visit(FormalParameterList n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance _ret=null;
- TypeInstance para1 = n.f0.accept(this, symt);
- TypeInstance parar = n.f1.accept(this, symt);
- TypeInstance ret = (para1.hasChecked() &&
- parar.hasChecked()) ?
- new TypeInstance(null, TypeEnum.CHECK) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> Type()
- * f1 -> Identifier()
- */
- public TypeInstance visit(FormalParameter n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> ","
- * f1 -> FormalParameter()
- */
- public TypeInstance visit(FormalParameterRest n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- TypeInstance ret = n.f1.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> ArrayType()
- * | BooleanType()
- * | IntegerType()
- * | Identifier()
- */
- public TypeInstance visit(Type n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = n.f0.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> "int"
- * f1 -> "["
- * f2 -> "]"
- */
- public TypeInstance visit(ArrayType n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = new TypeInstance(null, TypeEnum.intarray);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> "boolean"
- */
- public TypeInstance visit(BooleanType n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = new TypeInstance(null, TypeEnum.bool);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> "int"
- */
- public TypeInstance visit(IntegerType n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = new TypeInstance(null, TypeEnum.integer);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> Block()
- * | AssignmentStatement()
- * | ArrayAssignmentStatement()
- * | IfStatement()
- * | WhileStatement()
- * | PrintStatement()
- */
- public TypeInstance visit(Statement n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = n.f0.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> "{"
- * f1 -> ( Statement() )*
- * f2 -> "}"
- */
- public TypeInstance visit(Block n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- TypeInstance ret = n.f1.accept(this, symt);
- n.f2.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- // FIXME FIXME FIXME
- // Given we only have a few types, what is a subtype of what?
- /**
- * [23]: Expression is a subtype of identifier, and e typechecks*
- *
- * f0 -> Identifier()
- * f1 -> "="
- * f2 -> Expression()
- * f3 -> ";"
- */
- public TypeInstance visit(AssignmentStatement n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance lhs = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance rhs = n.f2.accept(this, symt);
- n.f3.accept(this, symt);
- TypeInstance ret = (lhs.sameType(rhs)) ?
- new TypeInstance(null, TypeEnum.CHECK) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- // FIXME (this may be done)
- /**
- * [24]: Identifier is an integer array, expressions are both integers
- *
- * f0 -> Identifier()
- * f1 -> "["
- * f2 -> Expression()
- * f3 -> "]"
- * f4 -> "="
- * f5 -> Expression()
- * f6 -> ";"
- */
- public TypeInstance visit(ArrayAssignmentStatement n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance id = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance index = n.f2.accept(this, symt);
- n.f3.accept(this, symt);
- n.f4.accept(this, symt);
- TypeInstance value = n.f5.accept(this, symt);
- n.f6.accept(this, symt);
- TypeInstance ret = (id.getType() == TypeEnum.intarray &&
- index.getType() == TypeEnum.integer &&
- value.getType() == TypeEnum.integer) ?
- new TypeInstance(null, TypeEnum.CHECK) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [25]: Expression is a bool, both statements type-check
- *
- * f0 -> "if"
- * f1 -> "("
- * f2 -> Expression()
- * f3 -> ")"
- * f4 -> Statement()
- * f5 -> "else"
- * f6 -> Statement()
- */
- public TypeInstance visit(IfStatement n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance expr = n.f2.accept(this, symt);
- n.f3.accept(this, symt);
- TypeInstance stmt1 = n.f4.accept(this, symt);
- n.f5.accept(this, symt);
- TypeInstance stmt2 = n.f6.accept(this, symt);
- TypeInstance ret = (expr.getType() == TypeEnum.bool &&
- stmt1.getType() == stmt2.getType() &&
- stmt1.hasChecked()) ?
- new TypeInstance(null, TypeEnum.CHECK) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
-
- }
-
- /**
- * DONE [26]: Expression is a bool, statement type-checks
- *
- * f0 -> "while"
- * f1 -> "("
- * f2 -> Expression()
- * f3 -> ")"
- * f4 -> Statement()
- */
- public TypeInstance visit(WhileStatement n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance expr = n.f2.accept(this, symt);
- n.f3.accept(this, symt);
- TypeInstance stmt = n.f4.accept(this, symt);
- TypeInstance ret = (expr.getType() == TypeEnum.bool &&
- stmt.hasChecked()) ?
- new TypeInstance(null, TypeEnum.CHECK) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [27]: Expression is an integer
- *
- * f0 -> "System.out.println"
- * f1 -> "("
- * f2 -> Expression()
- * f3 -> ")"
- * f4 -> ";"
- */
- public TypeInstance visit(PrintStatement n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance ret = n.f2.accept(this, symt);
- n.f3.accept(this, symt);
- n.f4.accept(this, symt);
- ret = (ret.getType() == TypeEnum.integer) ?
- new TypeInstance(null, TypeEnum.CHECK) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> AndExpression()
- * | CompareExpression()
- * | PlusExpression()
- * | MinusExpression()
- * | TimesExpression()
- * | ArrayLookup()
- * | ArrayLength()
- * | MessageSend()
- * | PrimaryExpression()
- */
- public TypeInstance visit(Expression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = n.f0.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [28]: If expressions are both booleans, return is a boolean
- *
- * f0 -> PrimaryExpression()
- * f1 -> "&&"
- * f2 -> PrimaryExpression()
- */
- public TypeInstance visit(AndExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance oper1 = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance oper2 = n.f2.accept(this, symt);
- TypeInstance ret = (oper1.getType() == TypeEnum.bool &&
- oper2.getType() == TypeEnum.bool) ?
- new TypeInstance(null, TypeEnum.bool) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [29]: If expressions are both integers, return is a boolean
- *
- * f0 -> PrimaryExpression()
- * f1 -> "<"
- * f2 -> PrimaryExpression()
- */
- public TypeInstance visit(CompareExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance oper1 = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance oper2 = n.f2.accept(this, symt);
- TypeInstance ret = (oper1.getType() == TypeEnum.integer &&
- oper2.getType() == TypeEnum.integer) ?
- new TypeInstance(null, TypeEnum.bool) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [30]: If expressions are both integers, return is an integer
- *
- * f0 -> PrimaryExpression()
- * f1 -> "+"
- * f2 -> PrimaryExpression()
- */
- public TypeInstance visit(PlusExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance oper1 = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance oper2 = n.f2.accept(this, symt);
- TypeInstance ret = (oper1.getType() == TypeEnum.integer &&
- oper2.getType() == TypeEnum.integer) ?
- new TypeInstance(null, TypeEnum.integer) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [31]: If expressions are both integers, return is an integer
- *
- * f0 -> PrimaryExpression()
- * f1 -> "-"
- * f2 -> PrimaryExpression()
- */
- public TypeInstance visit(MinusExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance oper1 = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance oper2 = n.f2.accept(this, symt);
- TypeInstance ret = (oper1.getType() == TypeEnum.integer &&
- oper2.getType() == TypeEnum.integer) ?
- new TypeInstance(null, TypeEnum.integer) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [32]: If expressions are both integers, return is an integer
- *
- * f0 -> PrimaryExpression()
- * f1 -> "*"
- * f2 -> PrimaryExpression()
- */
- public TypeInstance visit(TimesExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance oper1 = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance oper2 = n.f2.accept(this, symt);
- TypeInstance ret = (oper1.getType() == TypeEnum.integer &&
- oper2.getType() == TypeEnum.integer) ?
- new TypeInstance(null, TypeEnum.integer) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [33]: If expr1 is an integer array and expr2 is an int,
- * return is an int
- *
- * f0 -> PrimaryExpression()
- * f1 -> "["
- * f2 -> PrimaryExpression()
- * f3 -> "]"
- */
- public TypeInstance visit(ArrayLookup n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance array = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- TypeInstance index = n.f2.accept(this, symt);
- n.f3.accept(this, symt);
- TypeInstance ret = (array.getType() == TypeEnum.intarray &&
- index.getType() == TypeEnum.integer) ?
- new TypeInstance(null, TypeEnum.integer) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [34]: If expr1 is an integer array, return is an int
- *
- * f0 -> PrimaryExpression()
- * f1 -> "."
- * f2 -> "length"
- */
- public TypeInstance visit(ArrayLength n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- n.f2.accept(this, symt);
- ret = (ret.getType() == TypeEnum.intarray) ? new TypeInstance(null, TypeEnum.integer) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- // FIXME FIXME FIXME
- /**
- * [35]: PrimaryExpr must be a classname, id must be a method name, expressionlist must be correct?
- *
- * f0 -> PrimaryExpression()
- * f1 -> "."
- * f2 -> Identifier()
- * f3 -> "("
- * f4 -> ( ExpressionList() )?
- * f5 -> ")"
- */
- public TypeInstance visit(MessageSend n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- // this MUST be an instance of a class!
- TypeInstance t = n.f0.accept(this, symt);
- ClassInstance c = t.getClassInstance();
- n.f1.accept(this, symt);
- n.f2.accept(this, symt);
- MethodInstance m = symt.getMethod(n.f2.f0.tokenImage);
- n.f3.accept(this, symt);
- n.f4.accept(this, symt);
- n.f5.accept(this, symt);
- --this.offset;
- return (true) ?
- new TypeInstance(null, m.getReturn()) :
- new TypeInstance(null, TypeEnum.ERROR);
- }
-
- // FIXME
- /**
- * f0 -> Expression()
- * f1 -> ( ExpressionRest() )*
- */
- public TypeInstance visit(ExpressionList n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance expr1 = n.f0.accept(this, symt);
- TypeInstance exprr = n.f1.accept(this, symt);
- TypeInstance ret = (expr1.hasChecked() &&
- exprr.hasChecked()) ?
- new TypeInstance(null, TypeEnum.CHECK) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> ","
- * f1 -> Expression()
- */
- public TypeInstance visit(ExpressionRest n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- TypeInstance ret = n.f1.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * f0 -> IntegerLiteral()
- * | TrueLiteral()
- * | FalseLiteral()
- * | Identifier()
- * | ThisExpression()
- * | ArrayAllocationExpression()
- * | AllocationExpression()
- * | NotExpression()
- * | BracketExpression()
- */
- public TypeInstance visit(PrimaryExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance ret = n.f0.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [36]: return is an int
- *
- *
- * f0 -> <INTEGER_LITERAL>
- */
- public TypeInstance visit(IntegerLiteral n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- this.printNode(n, symt, false, TypeEnum.integer);
- --this.offset;
- return new TypeInstance(null, TypeEnum.integer);
- }
-
- /**
- * DONE [37]: return is a bool
- *
- * f0 -> "true"
- */
- public TypeInstance visit(TrueLiteral n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- this.printNode(n, symt, false, TypeEnum.bool);
- --this.offset;
- return new TypeInstance(null, TypeEnum.bool);
- }
-
- /**
- * DONE [38]: return is a bool
- *
- * f0 -> "false"
- */
- public TypeInstance visit(FalseLiteral n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- this.printNode(n, symt, false, TypeEnum.bool);
- --this.offset;
- return new TypeInstance(null, TypeEnum.bool);
- }
-
- // FIXME
- /**
- * [39]: id is a symbol in the current domain, return is id's type
- *
- * f0 -> <IDENTIFIER>
- */
- public TypeInstance visit(Identifier n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- TypeInstance type;
- TypeInstance ret;
- ClassInstance cls;
- if ((cls = symt.getClass(n.f0.tokenImage)) != null) {
- // covers "anonymous" instance
- ret = new TypeInstance(cls.getName(),
- TypeEnum.classname);
- ret.addClassInstance(cls);
- } else {
- if ((type = symt.getType(n.f0.tokenImage)) != null) {
- ret = new TypeInstance(type.getName(),
- type.getType());
- ret.addClassInstance(type.getClassInstance());
- } else
- ret = new TypeInstance(null, TypeEnum.ERROR);
- }
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- // FIXME FIXME FIXME
- /**
- * [40]: method exists? but where is the token?
- *
- * f0 -> "this"
- */
- public TypeInstance visit(ThisExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- TypeInstance ret = new TypeInstance(null, TypeEnum.CHECK);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * DONE [41]: if expression is an integer, return is an int array
- *
- * f0 -> "new"
- * f1 -> "int"
- * f2 -> "["
- * f3 -> Expression()
- * f4 -> "]"
- */
- public TypeInstance visit(ArrayAllocationExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- n.f1.accept(this, symt);
- n.f2.accept(this, symt);
- TypeInstance ret = n.f3.accept(this, symt);
- n.f4.accept(this, symt);
- ret = (ret.getType() == TypeEnum.integer) ? new TypeInstance(null, TypeEnum.intarray) :
- new TypeInstance(null, TypeEnum.ERROR);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- // FIXME
- /**
- * [42]:
- *
- * f0 -> "new"
- * f1 -> Identifier()
- * f2 -> "("
- * f3 -> ")"
- */
- public TypeInstance visit(AllocationExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- TypeInstance ret = n.f1.accept(this, symt);
- n.f2.accept(this, symt);
- n.f3.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
- /**
- * [43]: if expression is a boolean, return is a boolean
- *
- * f0 -> "!"
- * f1 -> Expression()
- */
- public TypeInstance visit(NotExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- TypeInstance ret = n.f1.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return (ret.getType() == TypeEnum.bool) ? ret : new TypeInstance(null, TypeEnum.ERROR);
- }
-
- /**
- * [44]: if e is a type, return is that same type
- *
- * f0 -> "("
- * f1 -> Expression()
- * f2 -> ")"
- */
- public TypeInstance visit(BracketExpression n, SymbolTable symt) {
- ++this.offset;
- this.printNode(n, symt, true, null);
-
- n.f0.accept(this, symt);
- TypeInstance ret = n.f1.accept(this, symt);
- n.f2.accept(this, symt);
-
- this.printNode(n, symt, false, ret.getType());
- --this.offset;
- return ret;
- }
-
-}
generated by cgit v1.2.3 (git 2.39.1) at 2025-05-12 18:13:00 +0000