I propose the start of the number regex match be changed from:
(\b\d+)?'...
to
(\b\d+)?'s?...
This would allow proper matching of Verilog 2001 signed numbers. From Signed Arithmetic in Verilog 2001 – Opportunities and Hazards, by Dr. Greg Tumbush of Starkey Labs;
"The only way to declare a signed value in Verilog 1995 was to declare it as an integer which limited the size of the value to 32-bits only[1]. Verilog 2001 provides the ‘s construct for declaring and specifying a sized value assigned. For example, 2 represented as a 3-bit signed hex value would be specified as 3’sh2. Somewhat confusing is specifying negative signed values. The value -4 represented as a 3-bit signed hex value would be specified as -3’sh4. A decimal number is always signed."
pro711
commented
11 years ago
I propose the start of the number regex match be changed from:
(\b\d+)?'...
to
(\b\d+)?'s?...
This would allow proper matching of Verilog 2001 signed numbers. From Signed Arithmetic in Verilog 2001 – Opportunities and Hazards, by Dr. Greg Tumbush of Starkey Labs;
"The only way to declare a signed value in Verilog 1995 was to declare it as an integer which limited the size of the value to 32-bits only[1]. Verilog 2001 provides the ‘s construct for declaring and specifying a sized value assigned. For example, 2 represented as a 3-bit signed hex value would be specified as 3’sh2. Somewhat confusing is specifying negative signed values. The value -4 represented as a 3-bit signed hex value would be specified as -3’sh4. A decimal number is always signed."