Lines Matching refs:yield
30 // Yield statements.
31 function* g() { yield 3; yield 4; }
33 // Yield expressions.
34 function* g() { (yield 3) + (yield 4); }
36 // Yield without a RHS.
37 function* g() { yield; }
38 function* g() { yield }
40 yield
42 function* g() { (yield) }
43 function* g() { [yield] }
44 function* g() { {yield} }
45 function* g() { yield, yield }
46 function* g() { yield; yield }
47 function* g() { (yield) ? yield : yield }
49 (yield)
50 ? yield
51 : yield
54 // If yield has a RHS, it needs to start on the same line. The * in a
55 // yield* counts as starting the RHS.
57 yield *
60 assertThrows("function* g() { yield\n* foo }", SyntaxError);
63 yield
68 assertThrows("function* g() { yield ? yield : yield }", SyntaxError);
71 function* g() { "use strict"; yield 3; yield 4; }
74 // of yield expression.
75 function* g() { yield 1; return; }
76 function* g() { yield 1; return 2; }
77 function* g() { yield 1; return 2; yield "dead"; }
80 (function* () { yield 3; });
83 (function* g() { yield 3; });
85 // You can have a generator without a yield.
89 function* g() { yield yield 1; }
90 function* g() { yield 3 + (yield 4); }
92 // Generator definitions with a name of "yield" are not specifically ruled out
93 // by the spec, as the `yield' name is outside the generator itself. However,
94 // in strict-mode, "yield" is an invalid identifier.
95 function* yield() { (yield 3) + (yield 4); }
96 assertThrows("function* yield() { \"use strict\"; (yield 3) + (yield 4); }",
99 // In sloppy mode, yield is a normal identifier, outside of generators.
100 function yield(yield) { yield: yield (yield + yield (0)); }
102 // Yield is always valid as a key in an object literal.
103 ({ yield: 1 });
104 function* g() { yield ({ yield: 1 }) }
105 function* g() { yield ({ get yield() { return 1; }}) }
107 // Checks that yield is a valid label in sloppy mode, but not valid in a strict
109 function f() { yield: 1 }
110 assertThrows("function f() { \"use strict\"; yield: 1 }", SyntaxError)
111 assertThrows("function* g() { yield: 1 }", SyntaxError)
113 // Yield is only a keyword in the body of the generator, not in nested
115 function* g() { function f() { yield (yield + yield (0)); } }
117 // Yield in a generator is not an identifier.
118 assertThrows("function* g() { yield = 10; }", SyntaxError);
120 // Yield binds very loosely, so this parses as "yield (3 + yield 4)", which is
122 assertThrows("function* g() { yield 3 + yield 4; }", SyntaxError);
124 // Yield is still a future-reserved-word in strict mode
125 assertThrows("function f() { \"use strict\"; var yield = 13; }", SyntaxError);
128 assertThrows("function f() { (function* yield() {}); }", SyntaxError);
130 // In generators, yield is invalid as a formal argument name.
131 assertThrows("function* g(yield) { yield (10); }", SyntaxError);
