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.TH erl_internal 3 "stdlib 1.15.3" "Ericsson AB" "ERLANG MODULE DEFINITION"
.SH MODULE
erl_internal \- Internal Erlang Definitions
.SH DESCRIPTION
.LP
This module defines Erlang BIFs, guard tests and operators\&. This module is only of interest to programmers who manipulate Erlang code\&.
.SH EXPORTS
.LP
.B
bif(Name, Arity) -> bool()
.br
.RS
.TP
Types
Name = atom()
.br
Arity = integer()
.br
.RE
.RS
.LP
Returns \fItrue\fR if \fIName/Arity\fR is an Erlang BIF which is automatically recognized by the compiler, otherwise \fIfalse\fR\&.
.RE
.LP
.B
guard_bif(Name, Arity) -> bool()
.br
.RS
.TP
Types
Name = atom()
.br
Arity = integer()
.br
.RE
.RS
.LP
Returns \fItrue\fR if \fIName/Arity\fR is an Erlang BIF which is allowed in guards, otherwise \fIfalse\fR\&.
.RE
.LP
.B
type_test(Name, Arity) -> bool()
.br
.RS
.TP
Types
Name = atom()
.br
Arity = integer()
.br
.RE
.RS
.LP
Returns \fItrue\fR if \fIName/Arity\fR is a valid Erlang type test, otherwise \fIfalse\fR\&.
.RE
.LP
.B
arith_op(OpName, Arity) -> bool()
.br
.RS
.TP
Types
OpName = atom()
.br
Arity = integer()
.br
.RE
.RS
.LP
Returns \fItrue\fR if \fIOpName/Arity\fR is an arithmetic operator, otherwise \fIfalse\fR\&.
.RE
.LP
.B
bool_op(OpName, Arity) -> bool()
.br
.RS
.TP
Types
OpName = atom()
.br
Arity = integer()
.br
.RE
.RS
.LP
Returns \fItrue\fR if \fIOpName/Arity\fR is a Boolean operator, otherwise \fIfalse\fR\&.
.RE
.LP
.B
comp_op(OpName, Arity) -> bool()
.br
.RS
.TP
Types
OpName = atom()
.br
Arity = integer()
.br
.RE
.RS
.LP
Returns \fItrue\fR if \fIOpName/Arity\fR is a comparison operator, otherwise \fIfalse\fR\&.
.RE
.LP
.B
list_op(OpName, Arity) -> bool()
.br
.RS
.TP
Types
OpName = atom()
.br
Arity = integer()
.br
.RE
.RS
.LP
Returns \fItrue\fR if \fIOpName/Arity\fR is a list operator, otherwise \fIfalse\fR\&.
.RE
.LP
.B
send_op(OpName, Arity) -> bool()
.br
.RS
.TP
Types
OpName = atom()
.br
Arity = integer()
.br
.RE
.RS
.LP
Returns \fItrue\fR if \fIOpName/Arity\fR is a send operator, otherwise \fIfalse\fR\&.
.RE
.LP
.B
op_type(OpName, Arity) -> Type
.br
.RS
.TP
Types
OpName = atom()
.br
Arity = integer()
.br
Type = arith | bool | comp | list | send
.br
.RE
.RS
.LP
Returns the \fIType\fR of operator that \fIOpName/Arity\fR belongs to, or generates a \fIfunction_clause\fR error if it is not an operator at all\&.
.RE
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