diff options
Diffstat (limited to 'lib/compiler/src')
| -rw-r--r-- | lib/compiler/src/v3_core.erl | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl index 0f80eb68fa..b96d3df8fe 100644 --- a/lib/compiler/src/v3_core.erl +++ b/lib/compiler/src/v3_core.erl @@ -1640,10 +1640,19 @@ get_unit({bin_element,_,_,_,Flags}) -> U. %% is_guard_test(Expression) -> true | false. -%% Test if a general expression is a guard test. Use erl_lint here -%% as it now allows sys_pre_expand transformed source. - -is_guard_test(E) -> erl_lint:is_guard_test(E). +%% Test if a general expression is a guard test. +%% +%% Note that a local function overrides a BIF with the same name. +%% For example, if there is a local function named is_list/1, +%% any unqualified call to is_list/1 will be to the local function. +%% The guard function must be explicitly called as erlang:is_list/1. + +is_guard_test(E) -> + %% erl_expand_records has added a module prefix to any call + %% to a BIF or imported function. Any call without a module + %% prefix that remains must therefore be to a local function. + IsOverridden = fun({_,_}) -> true end, + erl_lint:is_guard_test(E, [], IsOverridden). %% novars(Expr, State) -> {Novars,[PreExpr],State}. %% Generate a novars expression, basically a call or a safe. At this |