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| author | Björn Gustavsson <[email protected]> | 2014-01-30 15:34:47 +0100 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2014-01-30 15:44:27 +0100 |
| commit | 4aeef6279f19a15c728befe817d78d669bb5d1fd (patch) | |
| tree | d9046d545bc2a62e0cf523e7a64f5860a2387029 /lib/compiler/src/sys_core_fold.erl | |
| parent | fdcdaca338849d7f63d4300e489318f6ee275d82 (diff) | |
| download | otp-4aeef6279f19a15c728befe817d78d669bb5d1fd.tar.gz otp-4aeef6279f19a15c728befe817d78d669bb5d1fd.tar.bz2 otp-4aeef6279f19a15c728befe817d78d669bb5d1fd.zip | |
Issue a warning when a named fun is constructed but not used
Diffstat (limited to 'lib/compiler/src/sys_core_fold.erl')
| -rw-r--r-- | lib/compiler/src/sys_core_fold.erl | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index 1cdbac5693..40f324b839 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -305,6 +305,10 @@ expr(#c_let{}=Let, Ctxt, Sub) -> %% Now recursively re-process the new expression. expr(Expr, Ctxt, sub_new_preserve_types(Sub)) end; +expr(#c_letrec{body=#c_var{}}=Letrec, effect, _Sub) -> + %% This is named fun in an 'effect' context. Warn and ignore. + add_warning(Letrec, useless_building), + void(); expr(#c_letrec{defs=Fs0,body=B0}=Letrec, Ctxt, Sub) -> Fs1 = map(fun ({Name,Fb}) -> {Name,expr(Fb, {letrec,Ctxt}, Sub)} |