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package Compiler;
import java.util.List;
/**
* Classes for possible statements in the language
*/
abstract class Statement {
/**
* Class for the main function of the program
*/
static class MainFunction extends Statement{
MainFunction(Statement block){
this.block = block;
}
final Statement block;
@Override
public String getStatmentType() {
return "main";
}
}
/**
* Class for representing a function
*/
static class Function extends Statement{
Function(Token name,Statement block,List<Expression> arguments,List<String> argumentTypes,String returnType){
this.block=block;
this.arguments=arguments;
this.returnType=returnType;
this.argumentTypes=argumentTypes;
this.name=name;
}
final Statement block;
final List<Expression> arguments;
final List<String> argumentTypes;
final String returnType;
final Token name;
@Override
public String getStatmentType() {
return "function";
}
}
/**
* Class for representing a function declaration
* needed for compiling to C
*/
static class FunctionDeclaration extends Statement{
FunctionDeclaration(Token name,List<String> argumentTypes,String returnType){
this.returnType=returnType;
this.argumentTypes=argumentTypes;
this.name=name;
}
final List<String> argumentTypes;
final String returnType;
final Token name;
@Override
public String getStatmentType() {
return "functionDec";
}
}
/**
* Class for representing a return statement
*/
static class ReturnStatement extends Statement{
ReturnStatement(Expression returnValue){
this.returnValue=returnValue;
}
final Expression returnValue;
@Override
public String getStatmentType() {
return "return";
}
}
/**
* Class for representing a statement for an expression
*/
static class ExpressionStatement extends Statement{
ExpressionStatement(Expression expr){
this.expr = expr;
}
final Expression expr;
@Override
public String getStatmentType() {
return "exprStmt";
}
}
/**
* Class for representing a block of statements
*/
static class BlockStatement extends Statement{
BlockStatement(List<Statement> statements){
this.statements=statements;
}
final List<Statement> statements;
@Override
public String getStatmentType() {
return "block";
}
}
/**
* Class for representing an if statement
*/
static class IfStatement extends Statement{
IfStatement(Expression condition, Statement ifBlock,Statement elseBlock){
this.condition=condition;
this.ifBlock=ifBlock;
this.elseBlock=elseBlock;
}
final Expression condition;
final Statement ifBlock;
final Statement elseBlock;
@Override
public String getStatmentType() {
return "ifStmt";
}
}
/**
* Class for representing a do loop
*/
static class DoStatement extends Statement{
DoStatement(Expression variable, Expression start,Expression stop,Expression step,Statement codeBlock){
this.variable=variable;
this.start=start;
this.stop=stop;
this.step=step;
this.codeBlock=codeBlock;
}
final Expression variable;
final Expression start;
final Expression stop;
final Expression step;
final Statement codeBlock;
@Override
public String getStatmentType() {
return "doStmt";
}
}
/**
* Class for representing a do while loop
*/
static class DoWhileStatement extends Statement{
DoWhileStatement(Expression condition,Statement codeBlock){
this.condition=condition;
this.codeBlock=codeBlock;
}
final Expression condition;
final Statement codeBlock;
@Override
public String getStatmentType() {
return "dowhileStmt";
}
}
/**
* Class for representing a integer or real declaration
*
*/
static class VariableDeclaration extends Statement{
VariableDeclaration(Token name,String type){
this.name=name;
this.type=type;
}
final Token name;
final String type;
@Override
public String getStatmentType() {
return "varDec";
}
}
/**
* Class for representing a string variable declaration
*/
static class StringDeclaration extends Statement{
StringDeclaration(Token name,Expression length){
this.name=name;
this.length=length;
}
final Token name;
final Expression length;
@Override
public String getStatmentType() {
return "stringDec";
}
}
/**
* Class for representing an array declaration
*/
static class ArrayDeclaration extends Statement{
ArrayDeclaration(Token name,String type,List<Expression> dimensions){
this.name=name;
this.dimensions=dimensions;
this.type=type;
}
final String type;
final Token name;
final List<Expression> dimensions;
@Override
public String getStatmentType() {
return "arrayDec";
}
}
/**
* Class for representing a print statement
*/
static class PrintStatement extends Statement{
PrintStatement(List<Expression> exprList){
this.exprList=exprList;
}
final List<Expression> exprList;
@Override
public String getStatmentType() {
return "print";
}
}
//Abstract function for getting the statement type
public abstract String getStatmentType();
}
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