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Diffstat (limited to 'st/SymTableFirst.java')
| -rw-r--r-- | st/SymTableFirst.java | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/st/SymTableFirst.java b/st/SymTableFirst.java new file mode 100644 index 0000000..13380fd --- /dev/null +++ b/st/SymTableFirst.java @@ -0,0 +1,238 @@ +package st; + +import syntaxtree.*; +import visitor.*; +import java.util.*; +import misc.*; + +/** + * Performs a preliminary visit through the AST, + * initializing all Instances and placing them in the table. + */ +public class SymTableFirst<R> extends GJDepthFirst<R,SymbolTable> { + + /** + * 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 R visit(MainClass n, SymbolTable symt) { + n.f0.accept(this, symt); + 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); + n.f11.accept(this, symt); + n.f12.accept(this, symt); + n.f13.accept(this, symt); + n.f14.accept(this, symt); + n.f15.accept(this, symt); + n.f16.accept(this, symt); + n.f17.accept(this, symt); + + + String id = n.f1.f0.tokenImage; + ClassInstance instance = new ClassInstance(id); + PrintFilter.print("Inserting " + id + " => " + instance.getType(), true); + symt.put(id, instance); + + id = "main"; + MethodInstance main = new MethodInstance(id, TypeEnum.ERROR); + PrintFilter.print("Inserting " + id + " => " + main.getType(), true); + symt.put(id, main); + + + return null; + } + + /** + * f0 -> "class" + * f1 -> Identifier() + * f2 -> "{" + * f3 -> ( VarDeclaration() )* + * f4 -> ( MethodDeclaration() )* + * f5 -> "}" + */ + public R visit(ClassDeclaration n, SymbolTable symt) { + n.f0.accept(this, symt); + 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); + + + String id = n.f1.f0.tokenImage; + ClassInstance instance = new ClassInstance(id); + PrintFilter.print("Inserting " + id + " => " + instance.getType(), true); + symt.put(id, instance); + + + return null; + } + + /** + * f0 -> "class" + * f1 -> Identifier() + * f2 -> "extends" + * f3 -> Identifier() + * f4 -> "{" + * f5 -> ( VarDeclaration() )* + * f6 -> ( MethodDeclaration() )* + * f7 -> "}" + */ + public R visit(ClassExtendsDeclaration n, SymbolTable symt) { + n.f0.accept(this, symt); + 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); + + + String id = n.f1.f0.tokenImage; + ClassInstance instance = new ClassInstance(id); + PrintFilter.print("Inserting " + id + " => " + instance.getType(), true); + symt.put(id, instance); + + + return null; + } + + /** + * f0 -> Type() + * f1 -> Identifier() + * f2 -> ";" + */ + public R visit(VarDeclaration n, SymbolTable symt) { + n.f0.accept(this, symt); + n.f1.accept(this, symt); + n.f2.accept(this, symt); + + String id = n.f1.f0.tokenImage; + TypeEnum rtrn = TypeEnum.ERROR; + switch (n.f0.f0.which) { + case 0: + rtrn = TypeEnum.intarray; break; + case 1: + rtrn = TypeEnum.bool; break; + case 2: + rtrn = TypeEnum.integer; break; + default: + PrintFilter.print("Unsupported case", true); + } + + TypeInstance instance = new TypeInstance(id, rtrn); + PrintFilter.print("Inserting " + id + "=> " + instance.getType(), true); + symt.put(id, instance); + + + return null; + } + + /** + * f0 -> "public" + * f1 -> Type() + * f2 -> Identifier() + * f3 -> "(" + * f4 -> ( FormalParameterList() )? + * f5 -> ")" + * f6 -> "{" + * f7 -> ( VarDeclaration() )* + * f8 -> ( Statement() )* + * f9 -> "return" + * f10 -> Expression() + * f11 -> ";" + * f12 -> "}" + */ + public R visit(MethodDeclaration n, SymbolTable symt) { + n.f0.accept(this, symt); + 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); + n.f11.accept(this, symt); + n.f12.accept(this, symt); + + + String id = n.f2.f0.tokenImage; + TypeEnum rtrn = TypeEnum.ERROR; + switch (n.f1.f0.which) { + case 0: + rtrn = TypeEnum.intarray; break; + case 1: + rtrn = TypeEnum.bool; break; + case 2: + rtrn = TypeEnum.integer; break; + default: + PrintFilter.print("Unsupported case", true); + } + + MethodInstance instance = new MethodInstance(id, rtrn); + PrintFilter.print("Inserting " + id + " => " + instance.getType(), true); + symt.put(id, instance); + + + return null; + } + + /** + * f0 -> Type() + * f1 -> Identifier() + */ + public R visit(FormalParameter n, SymbolTable symt) { + n.f0.accept(this, symt); + n.f1.accept(this, symt); + + + String id = n.f1.f0.tokenImage; + TypeEnum rtrn = TypeEnum.ERROR; + switch (n.f0.f0.which) { + case 0: + rtrn = TypeEnum.intarray; break; + case 1: + rtrn = TypeEnum.bool; break; + case 2: + rtrn = TypeEnum.integer; break; + default: + PrintFilter.print("Unsupported case", true); + } + + TypeInstance instance = new TypeInstance(id, rtrn); + PrintFilter.print("Inserting " + id + " => " + instance.getType(), true); + symt.put(id, instance); + + + return null; + } + +} |