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authorMarijn Suijten <[email protected]>2021-01-03 16:45:49 +0000
committerMarijn Suijten <[email protected]>2021-01-04 09:55:09 +0000
commitd33edb4e9cf1cad1c9ceb7c99859d73993ccba29 (patch)
tree84b93a8b3aa2c1c4e8c17fe72988b2270c80c331 /crates/toolchain/src
parentb87699d97ac34f95dc09d166d07fc1220b460821 (diff)
ssr: Allow replacing expressions with statements
Now that statements can be matched and replaced (#6587) some usecases require expressions to be replaced with statements as well. This happens when something that can ambiguously be an expression or statement like `if` and loop blocks appear in the last position of a block, as trailing expression. In this case a replacement pattern of the form `if foo(){$a();}==>>$a();` will only substitute `if` blocks in the list of statements but not if they (implicitly) end up in the trailing expression, where they are not wrapped by an EXPR_STMT (but the pattern and template are, as parsing only succeeds for the `stmt ==>> stmt` case). Instead of adding two rules that match an expression - and emit duplicate matching errors - allow the template for expressions to be a statement if it fails to parse as an expression.
Diffstat (limited to 'crates/toolchain/src')
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