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`#assert` is a new static assertion statement that will let us write tests for the new constant evaluation infrastructure that we are working on. `#assert` works by lowering to a `Builtin.poundAssert` SIL instruction. The constant evaluation infrastructure will look for these SIL instructions, const-evaluate their conditions, and emit errors if the conditions are non-constant or false. This commit implements parsing, typechecking and SILGen for `#assert`.
20 lines
735 B
Swift
20 lines
735 B
Swift
// RUN: %target-typecheck-verify-swift -enable-experimental-static-assert
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#assert(true, 123) // expected-error{{expected a string literal}}
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#assert(true, "error \(1) message") // expected-error{{'#assert' message cannot be an interpolated string literal}}
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#assert true, "error message") // expected-error{{expected '(' in #assert directive}}
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#assert(, "error message") // expected-error{{expected a condition expression}}
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func unbalanced1() {
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#assert(true // expected-error{{expected ')' in #assert directive}}
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// expected-note @-1 {{to match this opening '('}}
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}
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func unbalanced2() {
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#assert(true, "hello world" // expected-error{{expected ')' in #assert directive}}
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// expected-note @-1 {{to match this opening '('}}
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}
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