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https://github.com/LadybirdBrowser/ladybird.git
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e8519156bc
The three major changes are:
- Parsing parameters, the function body, and then the full assembled
function source all separately. This is required by the spec, as
function parameters and body must be valid each on their own, which
cannot be guaranteed if we only ever parse the full function.
- Returning an ECMAScriptFunctionObject instead of a FunctionExpression
that needs to be evaluated separately. This vastly simplifies the
{Async,AsyncGenerator,Generator,}Function constructor implementations.
Drop '_node' from the function name accordingly.
- The prototype is now determined via GetPrototypeFromConstructor and
passed to OrdinaryFunctionCreate.
112 lines
3.1 KiB
JavaScript
112 lines
3.1 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(
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SyntaxError,
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"Unexpected token Invalid. Expected CurlyClose (line: 4, column: 1)"
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);
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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(
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SyntaxError,
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"Unexpected token Invalid. Expected CurlyClose (line: 4, column: 1)"
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);
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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(
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SyntaxError,
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"Unexpected token Invalid. Expected CurlyClose (line: 4, column: 1)"
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);
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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(
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SyntaxError,
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"Unexpected token Invalid. Expected CurlyClose (line: 4, column: 1)"
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);
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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(
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SyntaxError,
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"Unexpected token Invalid. Expected CurlyClose (line: 4, column: 1)"
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);
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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(
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SyntaxError,
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"Unexpected token Invalid. Expected CurlyClose (line: 8, column: 1)"
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);
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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\\\r\nb"')()).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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test("template-literals raw and real value", () => {
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let lastTemplate;
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let lastRaw;
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function tag(cs) {
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lastTemplate = cs[0];
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lastRaw = cs.raw[0];
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}
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function checkTemplate(string_value, expected_template, expected_raw) {
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eval("tag`" + string_value + "`");
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expect(lastTemplate).toBe(expected_template);
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expect(lastRaw).toBe(expected_raw);
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}
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checkTemplate("", "", "");
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checkTemplate("\n", "\n", "\n");
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checkTemplate("\r", "\n", "\n");
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checkTemplate("\r\n", "\n", "\n");
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checkTemplate("\n\r\n", "\n\n", "\n\n");
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checkTemplate("a\\\nb", "ab", "a\\\nb");
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checkTemplate("a\\\rb", "ab", "a\\\nb");
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checkTemplate("a\\
b", "ab", "a\\
b");
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checkTemplate("a\\
b", "ab", "a\\
b");
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});
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