03d1c99d99
This is just a slight specialization of `TypesMatchWith` that returns
success if an optional parameter is missing.
There may be other places this could help e.g.:
eb21049b4b/mlir/include/mlir/Dialect/X86Vector/X86Vector.td (L58-L59)
...but I'm leaving those to avoid some churn.
This constraint will be handy for us in some later patches, it's a
formalization of a short circuiting trick with the `comparator` of the
`TypesMatchWith` constraint (devised for #69195).
```
TypesMatchWith<
"padding type matches element type of result (if present)",
"result", "padding",
"::llvm::cast<VectorType>($_self).getElementType()",
// This returns true if no padding is present, or it's present with a type that matches the element type of `result`.
"!getPadding() || std::equal_to<>()">
```
This is a little non-obvious, so after this patch you can instead do:
```
OptionalTypesMatchWith<
"padding type matches element type of result (if present)",
"result", "padding",
"::llvm::cast<VectorType>($_self).getElementType()">
```
24 lines
605 B
TableGen
24 lines
605 B
TableGen
// RUN: mlir-tblgen -I %S/../../include %s | FileCheck %s
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include "mlir/IR/Utils.td"
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// CHECK-DAG: string value = "CamelCaseTest"
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class already_camel_case {
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string value = snakeCaseToCamelCase<"CamelCaseTest">.ret;
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}
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// CHECK-DAG: string value = "Foo"
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class single_word {
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string value = snakeCaseToCamelCase<"foo">.ret;
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}
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// CHECK-DAG: string value = "ThisIsATest"
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class snake_case {
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string value = snakeCaseToCamelCase<"this_is_a_test">.ret;
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}
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// CHECK-DAG: string value = "ThisIsATestAgain"
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class extra_underscores {
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string value = snakeCaseToCamelCase<"__this__is_a_test__again__">.ret;
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}
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