REPLACE:

A string literal and a concatenation or replication of string literals are the only types of packed arrays that are allowed to be assigned to variables of type string.

WITH:

A variable of type string can be assigned an expression of type string, string literal, or packed array.

A string literal can be assigned to a string, a character, or a packed array. If their size differs the literal is right justified and zero filled on the left. For example:

char c = “A”; // assign to c “A”

bit [10:0] a = "\x41"; // assigns to a ‘b000_0100_0001

bit [1:4][7:0] h = "hello" ; // assigns to h “ello”

A string, string literal, or packed array can be assigned to a string variable. The string variable will grow to accommodate the packed array. If the size (in bits) of the packed array is not a multiple of 8 then the packed array is zero filled on the left. For example:

string s1 = "hello"; // sets s1 to “hello”

bit [11:0] b = 12’ha41;

string s2 = b; // sets s2 to ‘h0a41