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45 lines
2.9 KiB
D
45 lines
2.9 KiB
D
/*
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REQUIRED_ARGS: -preview=in -preview=dip1000
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TEST_OUTPUT:
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----
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fail_compilation/previewin.d(4): Error: function `takeFunction` is not callable using argument types `(void function(real x) pure nothrow @nogc @safe)`
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fail_compilation/previewin.d(4): cannot pass argument `(real x) { }` of type `void function(real x) pure nothrow @nogc @safe` to parameter `void function(in real) f`
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fail_compilation/previewin.d(11): `previewin.takeFunction(void function(in real) f)` declared here
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fail_compilation/previewin.d(5): Error: function `takeFunction` is not callable using argument types `(void function(scope const(real) x) pure nothrow @nogc @safe)`
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fail_compilation/previewin.d(5): cannot pass argument `(scope const(real) x) { }` of type `void function(scope const(real) x) pure nothrow @nogc @safe` to parameter `void function(in real) f`
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fail_compilation/previewin.d(11): `previewin.takeFunction(void function(in real) f)` declared here
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fail_compilation/previewin.d(6): Error: function `takeFunction` is not callable using argument types `(void function(ref scope const(real) x) pure nothrow @nogc @safe)`
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fail_compilation/previewin.d(6): cannot pass argument `(ref scope const(real) x) { }` of type `void function(ref scope const(real) x) pure nothrow @nogc @safe` to parameter `void function(in real) f`
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fail_compilation/previewin.d(11): `previewin.takeFunction(void function(in real) f)` declared here
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fail_compilation/previewin.d(15): Error: assigning scope variable `arg` to global variable `myGlobal` is not allowed in a `@safe` function
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fail_compilation/previewin.d(16): Error: assigning scope variable `arg` to global variable `myGlobal` is not allowed in a `@safe` function
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fail_compilation/previewin.d(17): Error: scope parameter `arg` may not be returned
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fail_compilation/previewin.d(18): Error: assigning scope variable `arg` to `ref` variable `escape` with longer lifetime is not allowed in a `@safe` function
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fail_compilation/previewin.d(22): Error: escaping a reference to parameter `arg` by returning `arg` is not allowed in a `@safe` function
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fail_compilation/previewin.d(22): perhaps annotate the parameter with `return`
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----
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*/
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#line 1
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void main ()
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{
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// No covariance without explicit `in`
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takeFunction((real x) {});
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takeFunction((const scope real x) {});
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takeFunction((const scope ref real x) {});
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tryEscape("Hello World"); // Yes by `tryEscape` is NG
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}
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void takeFunction(void function(in real) f);
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// Make sure things cannot be escaped (`scope` is applied)
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const(char)[] myGlobal;
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void tryEscape(in char[] arg) @safe { myGlobal = arg; }
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void tryEscape2(scope const char[] arg) @safe { myGlobal = arg; }
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const(char)[] tryEscape3(in char[] arg) @safe { return arg; }
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void tryEscape4(in char[] arg, ref const(char)[] escape) @safe { escape = arg; }
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// Okay: value type
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ulong[8] tryEscape5(in ulong[8] arg) @safe { return arg; }
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// NG: Ref
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ref const(ulong[8]) tryEscape6(in ulong[8] arg) @safe { return arg; }
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