VHDL Linting

The table below lists the VHDL linting rules that SVH can check automatically. The availability of linting rules depends on the license requirements.

Designer Edition Linting Rules

Designer Edition linting rules are available for all editions.

	Description	ID
	Null range: The left argument is strictly larger than the right	1
	Positional associations order	2
	‘Others’ position in associations	3
	Multiple others in associations	4
	Input port cannot be assigned	5
	Subprogram parameter cannot be assigned	6
	Constant cannot be assigned	7
	‘others’ has to be the last alternative in a case statement	9
	Deprecated IEEE packages	8
	Only one ‘others’ choice is allowed	10
	Case statement does not cover all cases	11
	Case alternative contains redundant choices	12
	Case statement contains all choices explicitly. You can safely remove the redundant ‘others’	13
	Case alternative contains duplicate choices	14
	C style equality operator	15
	C style inequality operator	16
	Incomplete associations	17
	Duplicate associations	18
	Invalid character literal	19
	Infinite loop. Loop is missing a wait, return or exit statement	20
	Function declarations in a package cannot have a function body	21
	Missing function body	22
	Invalid bit string literal	23
	Null range: The left argument is strictly smaller than the right	26
	Duplicate named associations	27
	Duplicate ‘all’ -style binding for component declaration	28
	Duplicate component instantiation binding	29
	Duplicate component instantiation binding	30
	Incorrect number of associations found in mapping	32
	A positional association cannot follow after a named association	33
	A signal cannot be the target of a variable assignment	34
	A port cannot be the target of a variable assignment	35
	A variable cannot be the target of a signal assignment	36
	Non-standard packages	37
	A process must either have a sensitivity list or contain one or more wait statements	38
	A process with a sensitivity list cannot contain any wait statements	39
	Procedure declarations in a package cannot have a procedure body	40
	Procedure declarations in a package body must have a procedure body	41
	Generate statements must have a label	42
	Instantiation statements must have a label	43
	Block statements must have a label	44
	There has to be a whitespace before physical units	47
	Unbound component instantiations	48
	Superfluous library clause	49
	Library is not available	50
	Matching case statement	51
	External name alias	52
	VHDL version check	53
	Duplicate declaration	54
	Find unused declarations	55
	Bitstrings may only contain std_logic metavalues	57
	A unary condition operator parentheses	58
	Duplicate design units	64
	Find unused ports	67
	Find unused generics	68
	Duplicate enum literal	69
	Invalid identifier	70
	Find dead states in state machines	71
	Find incomplete sensitivity lists	72
	Find superfluous signals in sensitivity lists	73
	Function pureness validation	76
	Find dead code	79
	Missing implementation	80
	Incorrect attribute class	81
	Invalid variable assignment	82
	Invalid signal assignment	83
	Report encrypted files	84
	Find duplicate signals in sensitivity lists	85
	A subprogram call cannot have an empty parameter lis	86
	Detect signals and variables that are never written	88
	Detect signals and variables that are never read	89
	None or multiple matching entities for component	90
	Unexpected tokens	91
	Check naming conventions	92
	Incomplete port map or generic map: using defaults	94
	Check line length	97
	Array assignment validation	144
	All references must have the same capitalization as their declaration	163
	Check for positional associations in instantiations	164
	Protected type bodies are not allowed in a package	168
	Invalid port associations	169
	VHDL version mismatch	170
	Invalid use of ‘bus’ keyword	171
	Invalid function parameter mode	172
	Invalid variable parameter in function	173
	Invalid function return type	174
	Invalid deferred constant declaration	175
	This declaration is not allowed in the current declarative region	176
	Order of generic and port associations	177
	Name mismatch	178
	Unexpected return type	179
	Configuration issue: Incorrect component name	180
	Configuration issue: Incorrect instantiation statement label	181
	Configuration issue: Missing or incorrect binding indication	182
	Configuration issue: Incorrect name in binding indication	183
	Incorrect use of keyword all	184
	Redundant boolean equality check with true	185
	Boolean equality check with false	186
	Check for component/entity mismatch	187
	Header comment does not match pattern	188
	Filename must contain primary unit name	189
	Empty loop statement	190
	VHDL 87 file declarations	191
	Entity name is a keyword in Verilog and may cause problems in mixed projects	192
	Concatenation of unconstrained aggregate	194
	Empty sensitivity list	197
	Instantiation mismatch	198
	Range wrapped inside parentheses	199
	Incomplete record aggregate	200
	No elements in a list	201
	Trailing separator in a list	202
	Cannot case on a type declaration	209
	Index out of range	210
	Slice has wrong direction	211
	VHDL version check	212
	Invalid use of return type identifiers	213
	Conditional return statements	214
	String literal is not properly closed	215
	An exponent for an integer literal shall not be negative	218
	Declaring the library ‘work’ is not allowed inside a context declaration	219
	Referencing the library ‘work’ is not allowed inside a context declaration	220, 221
	Common Libraries version mismatch	222
	VHDL version check	223
	Check case of non-keywords	224
	Type validation	226
	Loop variables cannot be assigned	227
	Whitespace in extended identifier	228
	Declaration not found	229
	Sequence of operators without parentheses	230
	Constant width vector assigned to signal	231
	Comparison of vectors with different sizes	232
	Missing full constant declaration	233
	Incorrect full constant subtype	234
	Magic number, bitstring, or string in statement	235
	Unconstrained signal or variable of integer type	236
	Unexpected FSM state type	237
	Incomplete reset branch	238
	Deep nesting of conditional and loop statements	239
	Unexpected keyword capitalization	240
	Incorrect vector range direction	241
	File contains multiple primary units	242
	Secondary unit in unexpected file	243
	Prohibited attribute	244
	Prohibited keyword or operator	245
	Prohibited package	246
	Prohibited pragma	247
	Prohibited library	248
	Clock signal not used as clock	249
	Unexpected clock edge specification	250
	Missing label	251
	Inconsistent reset style	252
	Multiple objects in one declaration	253
	Inconsistent clock edge usage	254
	Illegal mode view element mode	256
	Missing mode for record element in mode view	257

Deprecated Linting Rules

Deprecated linting rules were used by Sigasi at some point, but they’ve been removed or superseded in the most recent version.