See Also

Reserved keywords are used for beginnings, endings, and transitions of AHDL statements and for the predefined constant values GND and VCC.

Reserved keywords differ from reserved identifiers in that keywords can be used as symbolic names when they are enclosed in single quotation marks ('), whereas reserved identifiers cannot. Both reserved keywords and reserved identifiers can be used freely in comments.

Altera® recommends that you enter all keywords in capital letters for easy readability. See AHDL, VHDL & Verilog HDL Style Guide for more information.

The following list shows all AHDL reserved keywords:

AND
ASSERT
BEGIN
BIDIR
BITS
BURIED
CASE
CLIQUE
CONNECTED_PINS
CONSTANT
DEFAULTS
DEFINE
DESIGN
DEVICE
DIV
ELSE
ELSIF
END
FOR

FUNCTION
GENERATE
GND
HELP_ID
IF
INCLUDE
INPUT
IS
LOG2
MACHINE
MOD
NAND
NODE
NOR
NOT
OF
OPTIONS
OR
OTHERS

OUTPUT
PARAMETERS
REPORT
RETURNS
SEGMENTS
SEVERITY
STATES
SUBDESIGN
TABLE
THEN
TITLE
TO
TRI_STATE_NODE
VARIABLE
VCC
WHEN
WITH
XNOR
XOR

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