disable exponential-notation for now

#954 (comment)

Author: syuilo

src/parser/scanner.ts

@@ -13,7 +13,7 @@ const digit = /^[0-9]$/;
 const identifierStart = /^[A-Za-z_]$/u;
 const identifierPart = /^[A-Za-z0-9_]$/u;
 const hexDigit = /^[0-9a-fA-F]$/;
-const exponentIndicatorPattern = /^[eE]$/;
+//const exponentIndicatorPattern = /^[eE]$/;
 
 /**
  * 入力文字列からトークンを読み取るクラス
@@ -330,9 +330,6 @@ export class Scanner implements ITokenStream {
 					throw new AiScriptSyntaxError(`invalid character: "${this.stream.char}"`, pos);
 				}
 			}
-			// Use `return` or `continue` before reaching this line.
-			// Do not add any more code here. This line should be unreachable.
-			break;
 		}
 		// Use `return` or `continue` before reaching this line.
 		// Do not add any more code here. This line should be unreachable.
@@ -508,37 +505,38 @@ export class Scanner implements ITokenStream {
 			}
 		}
 
-		let exponentIndicator = '';
-		let exponentSign = '';
-		let exponentAbsolute = '';
-		if (!this.stream.eof && exponentIndicatorPattern.test(this.stream.char as string)) {
-			exponentIndicator = this.stream.char as string;
-			this.stream.next();
-			if (!this.stream.eof && (this.stream.char as string) === '-') {
-				exponentSign = '-';
-				this.stream.next();
-			} else if (!this.stream.eof && (this.stream.char as string) === '+') {
-				exponentSign = '+';
-				this.stream.next();
-			}
-			while (!this.stream.eof && digit.test(this.stream.char)) {
-				exponentAbsolute += this.stream.char;
-				this.stream.next();
-			}
-			if (exponentAbsolute.length === 0) {
-				throw new AiScriptSyntaxError('exponent expected', pos);
-			}
-		}
+		// 指数表記仕様が必要になった段階で有効化する
+		//let exponentIndicator = '';
+		//let exponentSign = '';
+		//let exponentAbsolute = '';
+		//if (!this.stream.eof && exponentIndicatorPattern.test(this.stream.char as string)) {
+		//	exponentIndicator = this.stream.char as string;
+		//	this.stream.next();
+		//	if (!this.stream.eof && (this.stream.char as string) === '-') {
+		//		exponentSign = '-';
+		//		this.stream.next();
+		//	} else if (!this.stream.eof && (this.stream.char as string) === '+') {
+		//		exponentSign = '+';
+		//		this.stream.next();
+		//	}
+		//	while (!this.stream.eof && digit.test(this.stream.char)) {
+		//		exponentAbsolute += this.stream.char;
+		//		this.stream.next();
+		//	}
+		//	if (exponentAbsolute.length === 0) {
+		//		throw new AiScriptSyntaxError('exponent expected', pos);
+		//	}
+		//}
 
 		let value: string;
 		if (fractional.length > 0) {
 			value = wholeNumber + '.' + fractional;
 		} else {
 			value = wholeNumber;
 		}
-		if (exponentIndicator.length > 0) {
-			value += exponentIndicator + exponentSign + exponentAbsolute;
-		}
+		//if (exponentIndicator.length > 0) {
+		//	value += exponentIndicator + exponentSign + exponentAbsolute;
+		//}
 		return TOKEN(TokenKind.NumberLiteral, pos, { hasLeftSpacing, value });
 	}
 

test/literals.ts

@@ -58,6 +58,7 @@ describe('literal', () => {
 		eq(res, NUM(0.5));
 	});
 
+	/* 指数表記仕様が必要になった段階で有効化する
 	test.concurrent('number (positive exponent without plus sign)', async () => {
 		const res = await exe(`
 		<: 1.2e3
@@ -84,6 +85,7 @@ describe('literal', () => {
 		<: 1.2e+
 		`), 'exponent expected');
 	});
+	*/
 
 	test.concurrent('arr (separated by comma)', async () => {
 		const res = await exe(`