CMake/Tests/RunCMake/GeneratorExpression/ListTransformApplyBadSelector.cmake at 0f6e8ded1d5efbb91ae741862f9090796ad649cc - CMake - Gitea: Git with a cup of tea

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Mickaël Germain 0f6e8ded1d GenEx: add $<LIST:TRANSFORM,...,APPLY,body> action

Add an APPLY action to $<LIST:TRANSFORM> that evaluates an arbitrary <body>
once per selected element, with $<_0> bound to the element, so a list can be
mapped through any generator expression at generate time.  Unlike the
configure-time list(TRANSFORM ... APPLY <function>) command, the genex form has
no side effects and returns the body's value directly, and a list-valued result
expands into multiple elements.

The body evaluates in its own binding scope, so nested APPLY actions can shadow
$<_0>, and context-sensitive state it observes (such as target dependencies)
still propagates to the enclosing expression.  APPLY accepts the same
AT/FOR/REGEX selectors as the canned actions.

Issue: #27892

2026-06-21 18:05:53 -07:00

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 # 'AT' with no following index is a malformed selector; APPLY must report the
 # same diagnostic the canned TRANSFORM actions do.
 file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/x.txt"
   CONTENT "$<LIST:TRANSFORM,a;b,APPLY,$<_0>,AT>")