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92181d3c0d
* Implement __ctfeWrite builtin Reworked stalled PR #12412. The __ctfeWrite function is already part of druntime (core.builtins), but was never implemented. The actual implementation is the one used at Weka (slightly different from PR #12412) and does not require any changes to expression.d (contrary to said PR). * fix file extension of changelog entry * fix changelog file naming * Improve changelog entry * Remove superfluous code and add test case.
58 lines
1 KiB
D
58 lines
1 KiB
D
/*
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TEST_OUTPUT:
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---
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Hello
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World
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from
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CTFE
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Hello[1 .. 3] = el
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S.str
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abcdefghij[2 .. 6] = cdef
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---
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*/
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struct S
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{
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string str = "S.str";
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alias str this;
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}
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int greeting(scope const char[][] values) pure nothrow @safe @nogc
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{
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const string newline = "\n";
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foreach (const val; values)
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{
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__ctfeWrite(val);
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__ctfeWrite(newline);
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}
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// Test slices
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const val = values[0];
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__ctfeWrite(val[]);
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__ctfeWrite(['[','1',' ','.','.',' ','3',']',' ','=',' ']);
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__ctfeWrite(val[1 .. 3]);
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__ctfeWrite(newline);
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S s;
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__ctfeWrite(s);
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__ctfeWrite(newline);
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// Test mutable slices
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char[10] buffer;
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fill(buffer); // Avoid potential shortcuts for literals
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__ctfeWrite(buffer[0 .. $]);
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__ctfeWrite("[2 .. 6] = ");
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__ctfeWrite(buffer[2 .. 6]);
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__ctfeWrite(newline);
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return 0;
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}
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void fill(ref char[10] buffer) pure nothrow @safe @nogc
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{
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foreach (const idx, ref ch; buffer)
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ch = cast(char)('a' + idx);
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}
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enum forceCTFE = greeting(["Hello", "World", "from", "CTFE"]);
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