Subtype Rules¶
subtype_001¶
This rule checks for indentation of the subtype keyword. Proper indentation enhances comprehension.
The indent amount can be controlled by the indentSize attribute on the rule. indentSize defaults to 2.
Violation
architecture rtl of fifo is
subtype read_size is range 0 to 9;
subtype write_size is range 0 to 9;
begin
Fix
architecture rtl of fifo is
subtype read_size is range 0 to 9;
subtype write_size is range 0 to 9;
begin
subtype_002¶
This rule checks for consistent capitalization of subtype names.
Violation
subtype read_size is range 0 to 9;
subtype write_size is range 0 to 9;
signal read : READ_SIZE;
signal write : write_size;
constant read_sz : read_size := 8;
constant write_sz : WRITE_size := 1;
Fix
subtype read_size is range 0 to 9;
subtype write_size is range 0 to 9;
signal read : read_size;
signal write : write_size;
constant read_sz : read_size := 8;
constant write_sz : write_size := 1;
subtype_003¶
This rule was depricated and replaced with rules: function_015, package_019, procedure_010, architecture_029 and process_037.
subtype_004¶
This rule checks for valid prefixes in subtype identifiers. The default new subtype prefix is st_.
Refer to the section Configuring Prefix and Suffix Rules for information on changing the allowed prefixes.
Violation
subtype my_subtype is range 0 to 9;
Fix
subtype st_my_subtype is range 0 to 9;