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https://github.com/RGBCube/serenity
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a10d09faba
ES 5(.1) described parsing of the function body string as: https://www.ecma-international.org/ecma-262/5.1/#sec-15.3.2.1 7. If P is not parsable as a FormalParameterList[opt] then throw a SyntaxError exception. 8. If body is not parsable as FunctionBody then throw a SyntaxError exception. We implemented it as building the source string of a complete function and feeding that to the parser, with the same outcome. ES 2015+ does exactly that, but with newlines at certain positions: https://tc39.es/ecma262/#sec-createdynamicfunction 16. Let bodyString be the string-concatenation of 0x000A (LINE FEED), ? ToString(bodyArg), and 0x000A (LINE FEED). 17. Let prefix be the prefix associated with kind in Table 49. 18. Let sourceString be the string-concatenation of prefix, " anonymous(", P, 0x000A (LINE FEED), ") {", bodyString, and "}". This patch updates the generated source string to match these requirements. This will make certain edge cases work, e.g. 'new Function("-->")', where the user supplied input must be placed on its own line to be valid syntax.
66 lines
1.9 KiB
JavaScript
66 lines
1.9 KiB
JavaScript
/*
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These tests deliberately produce syntax errors to check what line the parser thinks we're on.
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Note that line numbers are higher than you might expect as the parsed code is:
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function anonymous(
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) {
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<code>
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}
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⚠ PLEASE MAKE SURE TO NOT LET YOUR EDITOR REMOVE THE LS/PS LINE TERMINATORS!
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*/
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test("LINE FEED is a line terminator", () => {
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expect(() => {
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Function("\n\n@");
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}).toThrowWithMessage(SyntaxError, "line: 5, column: 1");
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});
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test("CARRIAGE RETURN is a line terminator", () => {
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expect(() => {
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Function("\r\r@");
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}).toThrowWithMessage(SyntaxError, "line: 5, column: 1");
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});
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test("LINE SEPARATOR is a line terminator", () => {
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expect(() => {
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Function("
@");
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}).toThrowWithMessage(SyntaxError, "line: 5, column: 1");
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});
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test("PARAGRAPH SEPARATOR is a line terminator", () => {
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expect(() => {
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Function("
@");
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}).toThrowWithMessage(SyntaxError, "line: 5, column: 1");
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});
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test("CR LF is counted as only one line terminator", () => {
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expect(() => {
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Function("\r\n\r\n@");
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}).toThrowWithMessage(SyntaxError, "line: 5, column: 1");
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});
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test("LF/CR are not allowed in string literal", () => {
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expect(() => {
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Function(`"
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"`);
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}).toThrowWithMessage(SyntaxError, "Unexpected token UnterminatedStringLiteral");
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});
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test("LS/PS are allowed in string literal", () => {
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expect(`"
"`).toEval();
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expect(`"
"`).toEval();
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});
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test("line terminators can be mixed (but please don't)", () => {
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expect(() => {
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Function("\r
\r\n
\n\r@");
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}).toThrowWithMessage(SyntaxError, "line: 9, column: 1");
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});
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test("all line terminators are valid for line continuations", () => {
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expect(Function('return "a\\\nb"')()).toBe("ab");
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expect(Function('return "a\\\rb"')()).toBe("ab");
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expect(Function('return "a\\
b"')()).toBe("ab");
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expect(Function('return "a\\
b"')()).toBe("ab");
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});
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