| commit | d1b344a826e02a8bc38033a6ff2e02a5d359625f | [log] [tgz] |
|---|---|---|
| author | Googler <noreply@google.com> | Tue Aug 13 12:22:44 2019 -0700 |
| committer | Copybara-Service <copybara-worker@google.com> | Tue Aug 13 12:23:33 2019 -0700 |
| tree | 8ac221d5c079501aa7f6b2e1567ae0bf8d4c7d78 | |
| parent | 8b5584f90d4c11c56b45407aba53735e8b9418d3 [diff] |
bazel syntax: don't use exceptions for control flow Second attempt at https://github.com/bazelbuild/bazel/commit/e114d8a04fe07dd32fee41b3cd2e5794f10a5a9d, rolled back in https://github.com/bazelbuild/bazel/commit/5d72d4ea54fdcb6e963cacb7181fda847e01bc50 due to breakage of j/c/g/devtools/builddiagnostics/diff/buildtree. Previously, break, continue, and return were implemented by throwing and catching exceptions. Now, the Eval.exec methods return a token to indicate the continuation: one of PASS, BREAK, CONTINUE, or RETURN. In addition, the return value is saved in the Eval, which is good for only one function invocation. This is simpler (and slightly more efficient). Also: - FlowStatement now includes PASS too; PassStatement is gone. - ReturnException is gone, plus one EvalException constructor. PiperOrigin-RevId: 263189912
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