Implements while loop

src/Parser/Parser.cpp

@@ -46,6 +46,8 @@ namespace Porygon::Parser {
                 return this->ParseIfStatement(current);
             case TokenKind ::ForKeyword:
                 return this->ParseForStatement();
+            case TokenKind ::WhileKeyword:
+                return this->ParseWhileStatement(current);
             case TokenKind ::BreakKeyword:
                 return new ParsedBreakStatement(current->GetStartPosition(), current -> GetLength());
             default:
@@ -312,6 +314,19 @@ namespace Porygon::Parser {
         }
     }
 
+    ParsedStatement *Parser::ParseWhileStatement(const IToken *current) {
+        auto condition = this -> ParseExpression(this -> Next());
+        auto doKeyword = this -> Next();
+        if (doKeyword -> GetKind() != TokenKind::DoKeyword){
+            this->ScriptData->Diagnostics->LogError(Diagnostics::DiagnosticCode::UnexpectedToken, doKeyword->GetStartPosition(),
+                                                    doKeyword->GetLength());
+            return new ParsedBadStatement(doKeyword->GetStartPosition(), doKeyword->GetLength());
+        }
+        auto block = this -> ParseBlock({TokenKind ::EndKeyword});
+        auto start = current -> GetStartPosition();
+        return new ParsedWhileStatement(condition, block, start, block->GetEndPosition() - start);
+    }
+
     /////////////////
     // Expressions //
     /////////////////
@@ -597,5 +612,4 @@ namespace Porygon::Parser {
             return new ParsedTableExpression(block, start, closeToken->GetEndPosition() - start);
         }
     }
-
 }