require untyped macros/templates to match before early expansion in generics #23094
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fixes #24186 When encountering pragma nodes in templates, if it's a language pragma, we don't process the name, and only any values if they exist. If it's not a language pragma, we process the full node. Previously only the values of colon expressions were processed. To make this simpler, `whichPragma` is patched to consider bracketed hint/warning etc pragmas like `{.hint[HintName]: off.}` as being a pragma of kind `wHint` rather than an invalid pragma which would have to be checked separately. From looking at the uses of `whichPragma` this doesn't seem like it would cause problems. Generics have [the same problem](https://github.com/nim-lang/Nim/blob/a27542195c9ba760d58e9d1e977313bc322a1ede/compiler/semgnrc.nim#L619) (causing #18649), but to make it work we need to make sure the templates/macros don't get evaluated or get evaluated correctly (i.e. passing the proc node as the final argument), either with #23094 or by completely disabling template/macro evaluation when processing the pragma node, which would also cover `{.pragma.}` templates.
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fixes #22740
In generic procs we expand fully untyped templates/macros as long as only 1 overload is in scope, however up to this point we didn't check if this overload actually matches the call (for example if the argument numbers are different). In this PR, after picking out the single fully untyped template/macro overload, we call
resolveOverloadson it to see if it matches, and don't expand it if it doesn't.