Merge pull request #25 from shashankbhosagi/main

⚡Impoved Error messages , Dynamic Array & Top Secret

BackEnd/Interpreter/Expressions/Expressions.ts

@@ -41,7 +41,7 @@ export const evaluate_assignment_expression = (
       rhs_value = (rhs as BooleanVal).value;
     }
 
-    const assigner = (node.assignee) as MemberExpr;
+    const assigner = node.assignee as MemberExpr;
     const assigner_name = (assigner.object as Identifier).symbol;
     const index = evaluate(assigner.property, env) as NumberVal;
     const index_val = index.value;
@@ -93,8 +93,10 @@ export const evaluate_member_expression = (
   env: Environment,
 ): RuntimeVal => {
   const object = evaluate(member.object, env);
+  // console.log(object);
 
   if (object.type === "array") {
+    // console.log(object.size);
     const index = evaluate(member.property, env) as NumberVal;
     if (index.type !== "number") {
       throw new Error("Array index must be a number");

BackEnd/Interpreter/Statements/Declaration_statements.ts

@@ -3,7 +3,13 @@ import {
   VariableDeclaration,
 } from "../../../FrontEnd/AST.ts";
 import Environment from "../../Scope/environment.ts";
-import { ArrayVal, MAKE_NUll, RuntimeVal } from "../../values.ts";
+import {
+  ArrayVal,
+  MAKE_NUll,
+  MAKE_NUM,
+  NumberVal,
+  RuntimeVal,
+} from "../../values.ts";
 import { evaluate } from "../interpreter.ts";
 
 /**
@@ -34,11 +40,32 @@ export const evaluate_array_declaration = (
   declaration: ArrayDeclaration,
   env: Environment,
 ): RuntimeVal => {
+  const size_expr = evaluate(declaration.size, env);
+  const values_provided = declaration.values.length;
+
+  if (size_expr.type !== "number") {
+    throw `error from array Shas`;
+  }
+  const arr_size = (evaluate(declaration.size, env) as NumberVal).value;
+  if (arr_size > 10000000) {
+    throw `Memory limit exceeded`;
+  } else if (arr_size <= 0) {
+    throw `Invalid Array size`;
+  }
+  if (values_provided > arr_size) {
+    throw `Size of array exceeded`;
+  }
+  let count: number = values_provided;
+  while (count < arr_size) {
+    declaration.values.push({ kind: "NumericLiteral", value: 0 });
+    count++;
+  }
+
   const arr = {
     type: "array",
     name: declaration.name,
     values: declaration.values,
-    size: declaration.size,
+    size: arr_size,
   } as ArrayVal;
 
   return env.declareVar(declaration.name, arr, false);

FrontEnd/AST.ts

@@ -317,7 +317,7 @@ export interface BreakStatement extends Stmt {
 export interface ArrayDeclaration extends Stmt {
   kind: "ArrayDeclaration";
   name: string;
-  size: number;
+  size: Expr;
   values: Expr[];
 }