Section 4.2

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Change:

Packed arrays can only be made of the single bit types: (bit, logic, reg, wire, and the other net types) and recursively other packed arrays and packed structures. Unpacked arrays can be made up of any type.

Integer types with predefined widths cannot have packed array dimensions declared. These types are: byte, shortint, int, longint, and integer. An integer type with a predefined width can be treated as a single dimension packed array. The packed dimensions of these integer types shall be numbered down to 0, such that the right-most index is 0.

byte c2; // same as bit [7:0] c2;

integer i1; // same as logic signed [31:0] i1;

Unpacked arrays can be made of any singular type. SystemVerilog enhances fixed-size unpacked arrays in that in addition to all other SystemVerilog variable types, unpacked arrays may also be made of object handles (see Section 11.4) and events (see Section 13.5).

LRM-346

Change:

SystemVerilog accepts a single number instead of a range, as an alternative to a range, to specify the size of an unpacked arrays, like C. That is, [size] becomes the same as [size-1:0]. For example:

Section 4.6

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Remove editor’s note:

Editor’s Note: Is new[] an operator, method or function (it is called a both function and an operator in the next subsection).

Section 4.13

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Change (add new section):

4.13 Associative Array Literals

Associative array literals use the {index:value} syntax with an optional default index. Like all other arrays, an associative array can be written one entry at a time, or the whole array contents can be replaced using an array literal.

concatenation ::=

…

| { array_member_label : expression { , array_member_label : expression } }

array_member_label ::=

default

| type_identifier

| constant_expression

Syntax 4-1—Associative array literal syntax (excerpt from Annex A.8.1)

For example:

// an associative array of strings indexed by 2-state integers, default is “foo”.

string words [int] = {default: ''foo''};

// an associative array of 4-state integers indexed by strings, default is –1.

integer table [string] = {"Peter":20, "Paul":22, "Mary":23, default:-1 };

If a default value is specified, then reading a non-existent element will yield the specified default value. Otherwise, the default initial value as described in Table 4-1 is returned.