Compiler Error Messages

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Compiler Error Messages

Every diagnostic the compiler can emit: 602 in all, 567 errors, 21 warnings and 14 notes.

Reading a diagnostic

Each one names the file, the line and the column, its severity and its id, then shows the line with a caret under the column:

prog.tiko(1,16): error TKO0653: 'x' and its initializer disagree about being a string
     |
   1 | dim as integer x = "a"
     |                ^

--diagnostics-format gnu writes the same diagnostic as prog.tiko:1:16: error: ... [TKO0653], the form most editors match.

• An error stops the build: nothing is linked, and the compiler exits with status 1.
• A warning does not. -Wno-TKOnnnn suppresses one id, and -Werror turns every warning into an error.
• A note follows an error or a warning and points at something related: where a name was first declared, or which instantiation of a generic produced the error.

tiko check reports every diagnostic a build would, without writing an object or linking. --diagnostics-file <path> also writes each one to a tab-separated file, for editors and scripts.

A diagnostic's number never changes. A retired diagnostic keeps its row rather than giving its number to another, so an id in an old build log still means what it meant then.

In the tables, ‹arg1›, ‹arg2› … mark where the compiler substitutes a name, a type or a path.

The Compiler limits and internal errors range is the compiler reporting on itself. An internal compiler error (TKO0993, TKO0994, TKO0995) is a bug in tiko, not in the program: the build stops rather than leave the construct out.

Failures after code generation -- clang, the archiver, the linker, the resource compiler -- are reported under their own ids in the driver range (TKO0109 to TKO0116 among them).

Source and file handling (TKO0001–TKO0099)

Id	Severity	Message
TKO0001	error	cannot open source file '‹arg1›': ‹arg2›
TKO0002	error	source file '‹arg1›' is empty
TKO0003	warning	source file '‹arg1›' is not valid UTF-8; bytes preserved verbatim

Driver and command line (TKO0100–TKO0199)

Id	Severity	Message
TKO0100	error	unknown option '‹arg1›'
TKO0101	error	option '‹arg1›' requires an argument
TKO0102	error	no input files
TKO0103	error	unknown target '‹arg1›'
TKO0104	error	32-bit targets are not supported; x86-64 only
TKO0105	warning	unknown diagnostic id '‹arg1›'
TKO0106	error	'‹arg1›' is not a recognised value for '‹arg2›'
TKO0108	error	'‹arg1›' is a Windows resource script; the target is not Windows
TKO0109	error	no resource compiler: ‹arg1›
TKO0110	error	compiling resource '‹arg1›' failed (exit ‹arg2›)
TKO0111	error	no usable toolchain: ‹arg1›
TKO0112	error	cannot write intermediate file '‹arg1›'
TKO0113	error	clang failed on '‹arg1›' (exit ‹arg2›)
TKO0114	error	'‹arg1›' is a ‹arg2› object, which target triple '‹arg3›' does not make
TKO0115	error	archiving failed (exit ‹arg1›)
TKO0116	error	link failed (exit ‹arg1›)
TKO0117	error	cannot write the diagnostics file '‹arg1›'
TKO0118	error	-cimport needs -cimport-out <file>: the binding has to go somewhere
TKO0119	error	importing a C header needs libclang: ‹arg1›
TKO0120	error	unable to import C header ‹arg1›
TKO0121	error	cannot write the binding '‹arg1›'
TKO0122	error	the binding generated for ‹arg1› does not compile; this is a bug in the C importer
TKO0123	error	-pic makes position-independent code for a Unix shared library; target '‹arg1›' is not a Unix
TKO0124	warning	LLVM is not installed: no clang was found, so this build cannot produce code -- install LLVM 18 or newer, or set TIKO_CLANG
TKO0140	error	cannot find module '‹arg1›' (searched: ‹arg2›)
TKO0141	error	import cycle: ‹arg1›
TKO0142	error	relative import '‹arg1›' leaves the package root '‹arg2›'
TKO0144	error	malformed tiko.toml: ‹arg1›
TKO0145	error	'‹arg1›' is in module directory '‹arg2›' but does not begin with '#module'
TKO0146	error	dependency '‹arg1›': ‹arg2›
TKO0147	error	module directory '‹arg1›' contains no .tiko or .bas files
TKO0148	error	package name '‹arg1›' is reserved for the toolchain
TKO0149	error	two packages named '‹arg1›': ‹arg2› and ‹arg3›
TKO0150	warning	module cache disabled: ‹arg1›
TKO0152	error	'--emit-tki' writes a module's interface, and needs one module directory as its input
TKO0153	error	'‹arg1›' was compiled against module object '‹arg2›', which is not there; compile it again with -c
TKO0154	error	'‹arg1›' cannot be used with '‹arg2›'
TKO0155	error	'link ‹arg1›' on '#import "‹arg2›"': package '‹arg3›' links nothing
TKO0156	error	'link ‹arg1›': package '‹arg2›' ships no ‹arg1› link of module '‹arg3›'
TKO0157	error	module '‹arg1›' is imported with 'link ‹arg2›' here and 'link ‹arg3›' elsewhere; a program links it one way
TKO0160	error	no target named '‹arg1›' (targets: ‹arg2›)
TKO0161	error	target '‹arg1›': '‹arg2›' is a module directory; modules are reached through #import, not listed
TKO0162	error	target '‹arg1›': '‹arg2›' not found
TKO0163	error	no profile named '‹arg1›' (profiles: ‹arg2›)
TKO0164	error	profile '‹arg1›' inherits itself: ‹arg2›
TKO0165	error	targets '‹arg1›' and '‹arg2›' write the same output '‹arg3›'
TKO0166	error	another build of '‹arg1›' is running (it holds ‹arg2›)
TKO0167	error	compiling '‹arg1›' crashed with exit code ‹arg2›
TKO0168	error	'tiko run' needs an exe target; '‹arg1›' is a ‹arg2›
TKO0169	note	'‹arg1›' is not cached: ‹arg2›
TKO0170	error	'tiko run' runs one target; name one of: ‹arg1›
TKO0171	error	could not copy '‹arg1›' to '‹arg2›'
TKO0172	error	cannot make an import library for '‹arg1›': ‹arg2›
TKO0173	error	'tiko c2t' translates one header per run; '‹arg1›' is a second
TKO0174	error	cannot read the C header '‹arg1›'
TKO0175	error	the translation of ‹arg1› does not compile; this is a bug in tiko c2t
TKO0176	error	module '‹arg1›' needs '‹arg2›' at run time, and there is no '‹arg3›'
TKO0177	error	cannot write the debug symbols of '‹arg1›': ‹arg2›

Lexer (TKO0200–TKO0299)

Id	Severity	Message
TKO0201	warning	missing closing quote in string literal
TKO0202	error	unterminated block comment
TKO0203	error	'‹arg1›' is not followed by any digits
TKO0205	warning	numeric literal is too large for 64 bits, truncated
TKO0206	warning	suffix ignored in '‹arg1›'
TKO0207	error	block string has no closing line; one must start with three quotes
TKO0208	error	block string line does not start with the closing line's indentation

Preprocessor (TKO0300–TKO0399)

Id	Severity	Message
TKO0300	error	unknown directive '#‹arg1›'
TKO0301	error	cannot open include file '‹arg1›'
TKO0302	error	'#‹arg1›' without a matching '#if'
TKO0303	error	'#if' has no matching '#endif'
TKO0304	error	preprocessor nesting exceeded ‹arg1› levels
TKO0305	error	macro '‹arg1›' is already defined
TKO0306	error	macro '‹arg1›' takes ‹arg2› argument(s)
TKO0307	error	unterminated argument list for macro '‹arg1›'
TKO0308	error	invalid expression in '#‹arg1›'
TKO0309	error	#error: ‹arg1›
TKO0310	error	'#‹arg1›' is not implemented in this build
TKO0311	error	'#macro' without '#endmacro'
TKO0312	warning	unknown '#pragma ‹arg1›'
TKO0314	error	builtin macro '‹arg1›' is not implemented in this build
TKO0315	note	#print ‹arg1›
TKO0316	error	expected an identifier after '#‹arg1›'
TKO0317	error	unsupported language mode '‹arg1›'; tiko-lang implements "fb" only
TKO0318	error	cannot pop '#pragma ‹arg1›': the stack is empty
TKO0319	error	__FB_UNIQUEID_POP__( ‹arg1› ) has no matching push
TKO0320	error	'‹arg1›' has no type; tiko-lang implements #lang "fb" only, where default types and suffixes are not valid
TKO0321	error	expected a type parameter name
TKO0322	error	duplicated type parameter '‹arg1›'
TKO0323	error	'‹arg1›' does not name a type here, so it cannot own this constructor or destructor
TKO0324	error	argument ‹arg1› of '‹arg2›' must be an integer constant
TKO0325	error	argument of '‹arg1›' must be a constant expression
TKO0326	error	'#‹arg1›' takes a library name in quotes
TKO0327	error	expected a name, STATIC or DYNAMIC, then a quoted spec after #foreignlib
TKO0328	error	expected STATIC or DYNAMIC after the #foreignlib name, ‹arg1›
TKO0329	error	#foreignlib found no matching library file: ‹arg1›; tried: ‹arg2›
TKO0330	error	#foreignlib name already bound to a different library set, ‹arg1›
TKO0331	error	#line takes a line number, then an optional quoted file name
TKO0332	error	unexpected token after #line
TKO0333	error	#cmdline takes one quoted argument string
TKO0334	warning	#cmdline is ignored outside the first source file
TKO0335	error	#cinclude needs libclang: ‹arg1›
TKO0336	error	unable to import C header ‹arg1›
TKO0337	error	the binding generated for ‹arg1› does not compile; this is a bug in the C importer
TKO0338	error	‹arg1› defines '‹arg2›', which an earlier #cinclude in this unit left opaque; #cinclude ‹arg1› first
TKO0339	warning	#cinclude could not write its cache entry under '‹arg1›'; the binding is used from memory
TKO0340	error	'public #cinclude' needs the binding cache, which -cnocache turns off: ‹arg1› is not a file an importer can include
TKO0341	error	cannot open embed file '‹arg1›'
TKO0342	error	malformed '#embed': ‹arg1›
TKO0344	error	embed file '‹arg1›' is empty; an array cannot have no elements
TKO0345	error	embed file '‹arg1›' is ‹arg2› bytes; the limit is 256 MiB
TKO0346	error	embed file '‹arg1›' changed during the build: ‹arg2› bytes when read, ‹arg3› when first seen
TKO0360	error	'#module' must be the first directive in the file
TKO0361	error	'#module "‹arg1›"' does not match its directory '‹arg2›'
TKO0362	error	'#import' must come before any code, in the compiled file
TKO0363	error	the condition around '#import' uses '‹arg1›', which is not predefined
TKO0364	error	malformed '‹arg1›': ‹arg2›
TKO0365	error	'#export ‹arg1›': no macro of that name is defined here
TKO0366	error	‹arg1› is not allowed in a module file
TKO0367	error	'‹arg1›' is part of module '‹arg2›' and cannot be #included
TKO0369	error	‹arg1› is allowed only in a module file
TKO0370	error	‹arg1› here, but ‹arg2›
TKO0371	error	'‹arg1›' cannot be defined as a macro: it is ‹arg2›
TKO0372	error	the preprocessed program exceeded ‹arg1› tokens; a macro is expanding without bound

Parser (TKO0400–TKO0599)

Id	Severity	Message
TKO0400	error	expected an expression
TKO0401	error	expected '‹arg1›'
TKO0402	error	expected a member name after '.' or '->'
TKO0403	error	expression nesting exceeded ‹arg1› levels
TKO0404	error	unexpected token after expression
TKO0405	error	expected 'end ‹arg1›'
TKO0406	error	expected an identifier
TKO0407	error	inline assembly is not supported; compile that module with fbc
TKO0408	error	expected a statement
TKO0409	error	'‹arg1›' is not available in the fb dialect
TKO0410	error	'for each' with a name list takes no 'as' clause; each name is typed by its own element
TKO0411	error	'for each byref' cannot take a name list; bind the whole element byref instead
TKO0412	error	'for each' with a name list needs at least two names
TKO0413	error	every lambda capture needs an explicit 'byval' or 'byref'
TKO0414	error	'select channel' needs at least one case
TKO0415	error	expected receive, send, timeout or else after 'case'
TKO0416	error	expected '‹arg1›' in this 'select channel' case
TKO0417	error	only one 'case timeout' and one 'case else' are allowed
TKO0418	error	'select case' needs at least one 'case'
TKO0419	error	'is' is not allowed in a 'select case as const'
TKO0420	error	expected the end of the statement
TKO0421	error	'next' without a 'for': no loop is open for '‹arg1›'
TKO0422	error	a module constructor or destructor priority must be from 101 to 65535
TKO0423	error	'‹arg1›' needs '#import "std/tasks"' in this file (and -mt)
TKO0424	error	a typed variadic parameter is an array parameter: write '‹arg1›( ) as T ...'
TKO0425	error	'‹arg1›' cannot be written on the array parameter '‹arg2›': an array is always passed by descriptor
TKO0426	error	a destructor takes no parameters
TKO0427	error	a type extends one base type
TKO0428	error	an interface holds only 'inherits' lines and member declarations; '‹arg1›' cannot appear in one
TKO0429	error	'‹arg1›' cannot be written on an interface member: every member is public and abstract
TKO0430	error	'implements' names an interface member, as 'IName.Member'
TKO0432	error	a ‹arg1› names its base with an 'inherits' line in its body, not 'extends'
TKO0433	error	a type names its base with 'extends' on its header; 'inherits' lines are for classes and interfaces
TKO0434	error	an interface member has no body; write the body in a type that implements it
TKO0435	error	'‹arg1›' lines come first in the body, before any member
TKO0436	error	write 'implements' on its own line in the body of '‹arg1›', not on its header
TKO0437	error	a class cannot be '‹arg1›'
TKO0438	error	'implements' is written on the method's declaration inside its type
TKO0590	error	static property '‹arg1›' is init-only: only its initialiser sets it
TKO0591	error	field '‹arg1›' cannot be read in another field's initialiser: only static members can
TKO0592	error	a property block's getter returns 'value', a local: it cannot return byref
TKO0593	error	in a get/set block 'property' names a backing field, and this property has none: use 'value' or 'return'
TKO0594	error	'‹arg1›' is an auto-property: its accessors are synthesised and cannot be written by hand
TKO0595	error	auto-property '‹arg1›': ‹arg2›
TKO0596	error	property '‹arg1›' is init-only: only a constructor of '‹arg2›' may assign it
TKO0597	error	'swap' over the ‹arg1› property '‹arg2›' is not supported; swap through a temporary
TKO0598	error	a sub has no result type; declare it as a function to return a value
TKO0599	error	property '‹arg1›' has no address: its getter returns a value, not a reference

Semantic analysis (TKO0600–TKO0899)

Id	Severity	Message
TKO0600	error	'‹arg1›' is already declared in this scope
TKO0601	error	'‹arg1›' is a ‹arg2›, not a property: call it as '‹arg1›( ... )' instead of assigning to it
TKO0602	error	'‹arg1›' is a ‹arg2›, not a procedure
TKO0603	error	calling convention does not match the declaration of '‹arg1›'
TKO0604	error	#assert condition failed
TKO0605	error	expected a constant expression
TKO0606	error	'‹arg1›' cannot be walked by 'for each': it has no GetIterator( )
TKO0607	error	'‹arg1›' is not an iterator: it has no '‹arg2›'
TKO0608	error	'for each' over a multi-dimensional array has no defined order
TKO0609	error	'for each' cannot walk a fixed-length string: it carries no length
TKO0610	error	'for each' with a name list needs a tuple element; '‹arg1›' is not one
TKO0611	error	'for each' binds ‹arg1› names but the element has ‹arg2›
TKO0612	error	var-len array '‹arg1›' cannot be initialized
TKO0613	error	array '‹arg1›' is too big
TKO0614	error	'select case as const' needs a constant case value
TKO0615	error	invalid 'case' range: the start value is greater than the end value
TKO0616	error	'select case as const' spans more than ‹arg1› values
TKO0617	error	cannot modify '‹arg1›': it is a constant
TKO0618	error	too many expressions in the initializer for '‹arg1›'
TKO0619	error	'‹arg1›' is declared inside a procedure and cannot have methods
TKO0620	error	'‹arg1›' has an abstract type, which cannot be instantiated
TKO0621	error	'‹arg1›' is marked 'override' but overrides no virtual method
TKO0622	error	'‹arg1›' overrides a virtual method with a different return type
TKO0623	error	'‹arg1›' and the virtual method it overrides disagree about 'const'
TKO0624	error	'‹arg1›' overrides a virtual method with a different parameter mode
TKO0625	error	'‹arg1›' is not accessible here
TKO0626	error	'‹arg1›' takes a string
TKO0627	error	a pointer to a derived type casts only along its own chain
TKO0628	error	var-len string '‹arg1›' has static storage and cannot be initialized
TKO0629	error	'delete' takes a pointer
TKO0630	error	'.' reaches a member of a value; this is a pointer, so use '->'
TKO0631	error	'->' reaches a member through a pointer to a type; this is not one
TKO0632	error	no overload of '‹arg1›' matches these arguments
TKO0633	error	'‹arg1›' needs a constructor or destructor that is not accessible here
TKO0634	error	a procedure pointer cannot be dereferenced or used in arithmetic
TKO0635	error	'&=' concatenates, so its target must be a string
TKO0636	error	parameter '‹arg1›' cannot be a fixed-length string
TKO0637	error	an array is not a subscript
TKO0638	error	static member '‹arg1›' is only allowed in a top-level type
TKO0639	error	'byref' belongs before 'as', not after the return type
TKO0640	error	a parameter default cannot name '‹arg1›', which has automatic storage
TKO0641	error	this parameter takes a whole array, not an element
TKO0642	error	'swap' needs two variables, not a literal or a constant
TKO0643	error	'‹arg1›' is byref, so its initializer needs an address
TKO0644	error	'‹arg1›' is byref and must be bound where it is declared
TKO0645	error	'‹arg1›' is virtual, but its type does not extend 'object'
TKO0646	error	'‹arg1›' is abstract and cannot have a body
TKO0647	error	'operator new' and 'operator delete' are implicitly static and cannot be virtual
TKO0648	error	a 'put' blend mode is a word, not a string
TKO0649	error	an array name without a subscript is not a value
TKO0650	error	a byref result cannot return a local
TKO0651	error	the definition of '‹arg1›' disagrees with its declaration about 'byref'
TKO0652	error	a literal cannot be assigned to
TKO0653	error	'‹arg1›' and its initializer disagree about being a string
TKO0654	error	the base of '‹arg1›' has no constructor that takes no argument
TKO0655	error	the two arms of 'iif' have incompatible types
TKO0656	error	'‹arg1›' is extern or common and cannot be initialized
TKO0657	error	the type of '‹arg1›' has no constructor that takes no argument
TKO0658	error	'‹arg1›' is indexed with the wrong number of subscripts
TKO0659	error	dynamic array '‹arg1›' cannot be a member of a union
TKO0660	error	the call to '‹arg1›' matches more than one overload
TKO0661	error	'‹arg1›' was not declared as a static member variable
TKO0662	error	'‹arg1›' cannot reach its base type's private default constructor
TKO0663	error	'‹arg1›' cannot reach its base type's private destructor
TKO0664	error	'‹arg1›' cannot be written from a const method
TKO0665	error	a const method cannot call the non-const method '‹arg1›'
TKO0666	error	the type declares no '‹arg1›' to call
TKO0667	error	a byref result must be assigned something of exactly its type
TKO0668	error	a shared initialiser cannot reference '‹arg1›', which is not shared
TKO0669	error	'‹arg1›' adds a new name to a namespace from outside it
TKO0670	error	a pointer and a floating-point value do not convert into each other
TKO0671	error	division by a constant zero
TKO0672	error	the ALIAS name string is empty
TKO0673	error	the LIB name string is empty
TKO0674	error	this array bound is not known at compile time
TKO0675	error	a parameter default names '‹arg1›', which is not declared
TKO0676	error	'‹arg1›' mixes RETURN with 'FUNCTION =' over a result type that has constructors
TKO0677	error	'‹arg1›' is already declared with these parameter types
TKO0678	error	nothing may follow VIRTUAL or ABSTRACT but the procedure keyword
TKO0679	error	VIRTUAL and ABSTRACT belong to a member of a type
TKO0680	error	property '‹arg1›' has no setter taking ‹arg2›, so it cannot be assigned this way
TKO0681	error	a structor cannot be declared this way
TKO0682	error	CONST is for a member procedure, which has a THIS to be const
TKO0683	error	STATIC is for a member procedure
TKO0684	error	this operator is implicitly STATIC and cannot be CONST
TKO0685	error	the bitfield '‹arg1›' is wider than its type
TKO0686	error	these pointer types do not convert into each other
TKO0687	error	a bydesc parameter takes an array of exactly its element type
TKO0688	error	'for each' cannot walk a ustring; index it with 'for' and 'mid' instead
TKO0689	error	a string does not convert to a pointer
TKO0690	error	the dynamic array field '‹arg1›' cannot have a const element type
TKO0691	error	the array field '‹arg1›' cannot take an ellipsis bound
TKO0692	error	the array '‹arg1›' cannot have a const element type
TKO0693	error	base( ) is given more values than the base type has fields
TKO0694	error	'‹arg1›' names neither a namespace nor a type
TKO0695	error	'‹arg1›' is not an array and cannot be redimensioned
TKO0696	error	‹arg1› is written on this definition but not on its declaration
TKO0697	error	operator '‹arg1›' must be a member of a type
TKO0698	error	this argument does not convert to the parameter's type
TKO0699	error	a const value cannot be passed to a non-const byref parameter
TKO0700	error	'[ ]' indexes a pointer, and this is not one
TKO0701	error	only a module-level definition or a static member can be a module constructor
TKO0702	error	a string and a number do not convert into each other
TKO0703	error	operator [] cannot be STATIC
TKO0704	error	operator [] needs an explicit result type
TKO0705	error	'new' of a bare zstring or wstring allocates nothing
TKO0706	error	'new' cannot allocate a fixed-length string
TKO0707	error	'not' over a pointer; compare it with 0 instead
TKO0708	error	the image target of a graphics statement must be a pointer
TKO0709	error	this type has no conversion to a pointer for a graphics statement to draw into
TKO0710	error	the byref function '‹arg1›' never sets its result
TKO0711	error	a byref result must be assigned something with an address
TKO0712	error	the alias on the definition of '‹arg1›' does not match its declaration
TKO0713	error	'‹arg1›' is a type, not a member with a value
TKO0714	error	this case value is not the kind the select subject is
TKO0715	error	'with' takes a UDT value, not a number or a pointer
TKO0716	error	'->' through a value of a type that has no operator ->
TKO0717	error	'base.‹arg1›( )' calls an abstract method, which has no body
TKO0718	error	a union cannot be unpacked by let( )
TKO0719	error	'erase' over this array needs a plain parameterless cdecl constructor and destructor
TKO0720	error	no operator ‹arg1› compares this type
TKO0721	error	the dynamic array field '‹arg1›' must write its rank: '(any)'
TKO0722	error	the type '‹arg1›' never declared this constructor, destructor or property
TKO0723	error	only a var-len array can be redimensioned
TKO0724	error	a union is initialised with one value, not a group
TKO0725	error	'‹arg1›' has static storage and must be initialised from a constant, not a variable
TKO0726	error	'‹arg1›' is shared, which belongs at module level, not inside a block or procedure
TKO0727	error	the bounds of '‹arg1›' disagree with its EXTERN declaration
TKO0728	error	'‹arg1›' is declared EXTERN with a different number of dimensions
TKO0729	error	'‹arg1›' is byref and its initializer must have exactly its type
TKO0730	error	'‹arg1›' is a static reference and cannot be bound to a local
TKO0731	error	a byref procedure type must be a 'function' with an explicit result type
TKO0732	error	'‹arg1›' returns 'any', which is not a value
TKO0733	error	every parameter of a definition needs a name
TKO0734	error	CONST is not needed on a constructor or destructor
TKO0735	error	'base' must be followed by '.' or an argument list
TKO0736	error	the result type of '‹arg1›' has no default constructor
TKO0737	error	'erase' over this array needs a default constructor
TKO0738	error	no conversion between these two types
TKO0739	error	'‹arg1›' has no member named '‹arg2›'
TKO0740	error	'‹arg1›' overrides a virtual method with an array parameter of a different rank
TKO0741	error	a field name cannot carry a type suffix
TKO0742	error	'on ... goto' needs a numeric selector, not a string
TKO0743	error	'‹arg1›' is not declared
TKO0744	error	'‹arg1›' cannot be sized by 'ubound' inside its own initializer
TKO0745	error	the namespace '‹arg1›' has no member named '‹arg2›'
TKO0746	error	the ‹arg1› of '‹arg2›' is private or protected and cannot be reached from here
TKO0747	error	this drops a pointee's 'const'
TKO0748	error	a constant cannot have the type of '‹arg1›'
TKO0749	error	'threadcall' runs a SUB; '‹arg1›' is not one
TKO0750	error	'threadcall' cannot run '‹arg1›': ‹arg2›
TKO0751	error	a REDIM that declares '‹arg1›' must write its type
TKO0752	error	REDIM needs the array's bounds: '‹arg1›( ... )'
TKO0753	error	'‹arg1›' is a bitfield and has no address to bind byref
TKO0754	error	the type '‹arg1›' is too big
TKO0755	error	'‹arg1›' is byref with a default, which needs a complete type
TKO0756	error	a cast needs a SIZED string type, as in 'zstring * n'
TKO0757	error	'‹arg1›' holds a var-len string, which an initializer list cannot fill
TKO0758	error	'‹arg1›' has static storage and holds a bitfield, which its initializer cannot fill
TKO0759	error	'swap' needs two operands of the same kind
TKO0760	error	too many levels of pointer indirection (the limit is 8)
TKO0761	error	'‹arg1›' is declared SHARED from outside its namespace
TKO0762	error	'‹arg1›' is already defined from outside
TKO0763	error	'#pragma reserve' takes 'asm' or 'extern', not '‹arg1›'
TKO0764	error	'‹arg1›' is already reserved for that use
TKO0765	error	'‹arg1›' mixes 'any' with written bounds; use one or the other
TKO0766	error	a type's array field is declared with 'dim', not 'redim'
TKO0767	error	'‹arg1›' overrides a virtual method with a different calling convention
TKO0768	error	'‹arg1›' inherits a virtual destructor whose calling convention an implicit one cannot match
TKO0769	error	'‹arg1›' is reserved by '#pragma reserve' and cannot be declared
TKO0770	error	'‹arg1›' is reserved by '#pragma reserve' and cannot be used
TKO0771	error	'‹arg1›' is a var-len string, which cannot be declared '= any'
TKO0772	error	this expression is not a procedure pointer and cannot be called
TKO0773	error	this call passes ‹arg1› argument(s), but the procedure pointer takes ‹arg2›
TKO0774	error	argument ‹arg1› is left out, and the procedure pointer's declaration gives it no default
TKO0775	error	this call passes ‹arg1› argument(s), but '‹arg2›' takes ‹arg3›
TKO0776	error	argument ‹arg1› of '‹arg2›' is left out, and it has no default
TKO0777	error	'‹arg1›' is already the name of a type with members, which no value may share
TKO0778	error	'‹arg1›' has static storage and must be initialised from a constant expression
TKO0779	error	'‹arg1›' is declared in a namespace and cannot be removed with #undef
TKO0780	error	'‹arg1›' takes '...' and cannot be overloaded
TKO0781	error	'...' needs a 'cdecl' procedure, and this one is '‹arg1›'
TKO0782	error	'...' cannot be the first parameter
TKO0783	error	'‹arg1›' is not declared, so 'procptr' has no procedure to take
TKO0784	error	the type '‹arg1›' is used above its declaration
TKO0785	error	'‹arg1›' is not a procedure, so 'procptr' cannot take it
TKO0786	error	a property getter takes no parameter, or one index
TKO0787	error	a property setter takes its value, after any indices
TKO0788	error	a property cannot be static
TKO0789	error	operator '‹arg1›' takes ‹arg2› parameter(s) here
TKO0790	error	operator '‹arg1›' cannot be a member of a type
TKO0791	error	'procptr' takes the name of a procedure
TKO0792	error	'‹arg1›' cannot be overloaded
TKO0793	error	the result of '‹arg1›' does not match its declaration
TKO0794	error	'‹arg1›' was declared with ‹arg2› parameter(s)
TKO0795	error	parameter ‹arg1› of '‹arg2›' does not match its declaration
TKO0796	error	no declaration of '‹arg1›' matches this definition
TKO0797	warning	'threadcall' is not supported: '‹arg1›' will not run, and the thread handle is 0
TKO0798	error	'is ‹arg1›' needs a type derived from '‹arg2›', and '‹arg1›' is not one
TKO0799	error	'is' needs run-time type information, and '‹arg1›' has none: it does not extend 'object'
TKO0800	error	'is' needs an object and a type that extends 'object', not '‹arg1›'
TKO0801	error	'‹arg1›' does not take these arguments
TKO0802	error	'‹arg1›( string, ... )' cannot take a wide string; 'str( ... )' converts one
TKO0803	error	'‹arg1›( string, ... )' needs a var-len STRING, and this is ‹arg2›
TKO0804	error	'‹arg1›' to a pointer needs a pointer or a pointer-sized integer, and this is ‹arg2›
TKO0805	error	'‹arg1›' of a pointer needs a pointer or a pointer-sized integer type, and this names ‹arg2›
TKO0806	error	'‹arg1›' cannot be initialized from a ustring: no constructor of '‹arg2›' takes one, and a ustring does not convert to 'zstring ptr' here
TKO0807	error	'‹arg1›' is a keyword and cannot name ‹arg2›
TKO0808	error	the type '‹arg1›' is not declared
TKO0809	error	cannot infer the type arguments of '‹arg1›'; write them, as '‹arg1›( of ... )( ... )'
TKO0810	error	'‹arg1›' is an incomplete type: nothing declares it, so only a pointer to it may be used here
TKO0811	error	'‹arg1›' is still incomplete here: it is declared below this use, and only a pointer to it may be used above that
TKO0812	error	'spawn ‹arg1›' cannot pass its byref parameter '‹arg2›'; a string or UDT parameter is byref unless it is written 'byval'
TKO0813	error	'‹arg1›' is already declared by the runtime library
TKO0814	error	'defer' is not allowed at module level; put it in a procedure or a block
TKO0815	error	'‹arg1›' is generic; write its type arguments, as '‹arg1›( of ... )'
TKO0816	error	'‹arg1›' takes ‹arg2› type argument(s), and ‹arg3› are written here
TKO0817	error	the type parameters written for '‹arg1›' do not match its declaration, 'of ‹arg2›'
TKO0818	error	'for each byref' needs a byref Value( ), and '‹arg1›.Value( )' returns by value
TKO0819	error	'next' cannot name a FOR EACH variable: it is scoped to the loop body
TKO0820	error	no operator '‹arg1›' takes these operand types
TKO0821	error	a tuple needs at least two elements
TKO0822	error	the tuple element name '‹arg1›' is used twice
TKO0823	error	a tuple element cannot be 'any' or a fixed-length string
TKO0824	error	a tuple cannot be a base type; name a type after 'extends'
TKO0825	error	the tuple has ‹arg1› elements, and ‹arg2› are written
TKO0826	error	a tuple is expected here, and '‹arg1›' is not one
TKO0827	error	the jump to '‹arg1›' crosses a 'defer', which would still run when its scope ends
TKO0828	error	'defer' needs a statement on the same line
TKO0829	error	generic instantiation of '‹arg1›' is too deep (the limit is ‹arg2›; -maxinstdepth raises it)
TKO0830	warning	suspicious pointer assignment: a '‹arg1›' from a '‹arg2›'
TKO0831	error	a '‹arg1›' does not convert to the tuple element '‹arg2›'
TKO0832	error	'‹arg1›( n, x )' takes a character code or a ‹arg2› string as x, not ‹arg3›
TKO0833	warning	passing different pointer types: a '‹arg2›' for a '‹arg1›' parameter
TKO0834	error	'‹arg1›' is already the name of an enum, which no variable may share
TKO0835	error	'‹arg1›' is a value of an enum type, not the enum, so it has no members
TKO0836	error	an array result is written 'as T( )', with nothing between the parentheses
TKO0837	error	a procedure type cannot return an array; return it from a named procedure
TKO0838	error	this function returns an array: 'return' takes a brace list, a local array, or a call that returns an array of the same element type
TKO0839	error	a nested brace list cannot be returned as an array result; write a flat list
TKO0840	error	'‹arg1›' is not a local array of this procedure, so returning it would need a copy, which is not supported yet; return a local array or a brace list
TKO0841	error	'‹arg1›' returns an array, so it must be called with parentheses: '‹arg1›( )'
TKO0842	error	this call returns an array, which cannot be converted to another type
TKO0843	error	'‹arg1›' cannot take an initializer list: its type has no Add, PushBack or Push method
TKO0844	error	an initializer list on the static member '‹arg1›' is not supported yet; fill it with calls after its definition
TKO0845	error	'‹arg1›' is not an array, so it cannot take a '{ ... }' initializer
TKO0846	error	a '{ ... }' list can only initialize an array, and nothing here is one
TKO0847	error	format string: ‹arg1›
TKO0848	error	format string: ‹arg1›
TKO0849	error	format string: ‹arg1›
TKO0850	error	format string: ‹arg1›
TKO0851	error	format string: ‹arg1›
TKO0852	error	format string: ‹arg1›
TKO0853	error	format string: ‹arg1›
TKO0854	error	format string: ‹arg1›
TKO0855	error	format string: ‹arg1›
TKO0856	error	format string: ‹arg1›
TKO0857	error	format string: ‹arg1›
TKO0858	error	format string: ‹arg1›
TKO0859	error	property '‹arg1›' is read without parentheses: '()' would be an index
TKO0860	error	'‹arg1›' is not public in module '‹arg2›'
TKO0862	error	alias '‹arg1›' is already bound in this file (by '#import "‹arg2›"')
TKO0863	error	alias '‹arg1›' conflicts with a declaration of the same name
TKO0864	error	'‹arg1›' belongs to imported module '‹arg2›'; only that module can define it
TKO0865	note	'‹arg1›' here is the procedure '‹arg2›', which hides ‹arg3›
TKO0866	note	'‹arg1›' is also declared here, in a header an '#import' reads
TKO0867	error	constant definitions form a cycle: ‹arg1›
TKO0868	error	'‹arg1›' is module-private but appears in the public declaration of '‹arg2›'
TKO0869	error	'‹arg1›' is initialised from '‹arg2›', which is declared later
TKO0870	error	public '‹arg1›' has the same name as its module '‹arg2›'
TKO0871	error	a '‹arg1›' has no printable form; '‹arg2›' cannot take it
TKO0872	error	'‹arg1›' needs an argument list
TKO0873	error	'‹arg1›' is a sub and has no value
TKO0874	error	a value alone is not a statement; expected '='
TKO0875	error	property '‹arg1›' opens a statement with empty parentheses; expected an argument
TKO0876	error	this ‹arg1› cannot be empty
TKO0877	error	an anonymous ‹arg1› cannot sit directly inside a ‹arg1›; they must alternate
TKO0878	error	'‹arg1›' cannot hold itself: it is still being declared, and only a pointer to it may be a field
TKO0879	error	'‹arg1›' cannot be a module ‹arg2›: it is ‹arg3›, and only a public static member may be one
TKO0880	error	the jump to '‹arg1›' crosses the definition of '‹arg2›', which needs constructing
TKO0881	error	the jump to '‹arg1›' crosses the temporary holding ‹arg2›, which needs constructing
TKO0882	error	iif cannot build a '‹arg1›': it has constructors, but neither a default nor a copy one
TKO0883	error	GET cannot fill an array element reached through a function call; expected a pointer
TKO0884	error	a static member cannot be declared in an anonymous ‹arg1›
TKO0885	error	'any' cannot leave a new STRING uninitialized
TKO0886	error	'‹arg1›' cannot be declared here: only a namespace nested inside this one may be named
TKO0887	error	invalid array subscript in '‹arg1›': a lower bound is above its upper bound
TKO0888	error	'‹arg1›' is a shared or static reference: it must be bound to a variable, or to a constant element of a fixed array
TKO0889	error	the definition of '‹arg1›' does not match its declaration in the type
TKO0890	error	'‹arg1›' cannot convert a '‹arg2›'
TKO0891	error	no constructor of the base takes ‹arg1› argument(s)
TKO0892	error	base( ) needs a value: the base type has no constructor
TKO0893	error	'‹arg1›' is a keyword and cannot name a type
TKO0894	error	'‹arg1›' is a COMMON array, which is dynamic and cannot be given bounds
TKO0895	error	'‹arg1›' has an ellipsis bound, which needs an initializer to count
TKO0896	error	'‹arg1›' is dynamic: a REDIM cannot take an ellipsis bound
TKO0897	error	'‹arg1›' is const, so it needs a value: '= any' leaves it unset
TKO0898	error	'‹arg1›' cannot be of type ANY: only a pointer to it can
TKO0899	error	'‹arg1›' is a typedef defined in terms of itself

Semantic analysis, continued, and notes (TKO0900–TKO0989)

Id	Severity	Message
TKO0900	note	‹arg1›
TKO0901	note	declared here
TKO0902	note	'‹arg1›' is required by interface '‹arg2›', declared here
TKO0903	note	in instantiation of '‹arg1›'
TKO0905	note	unclosed '‹arg1›' opened here
TKO0906	note	imported here
TKO0907	note	did you mean '‹arg1›'? '#import "‹arg2›"' binds the name '‹arg1›'
TKO0908	error	a constructor( ) chain call must be the first statement of the constructor
TKO0909	error	operator -> must return a UDT, by value or byref
TKO0910	error	a pointer does not fit in a '‹arg1›'; only a pointer-sized integer takes one
TKO0911	error	type<‹arg1›>( ) needs values: the type has no constructor to call
TKO0912	error	no constructor of '‹arg1›' takes these values: a type that extends OBJECT is not filled field by field
TKO0913	error	'‹arg1›' is an array of '‹arg2›', whose destructor is not cdecl; an array can only destroy through a cdecl one
TKO0914	error	'‹arg1›' is an array: GET # and PUT # take an element, or the whole array written '‹arg1›( )'
TKO0915	error	'‹arg1›' takes no name: the next thing is FOR or AS
TKO0916	error	this type has more than one conversion to a pointer, so the graphics statement cannot choose one
TKO0917	error	'‹arg1›' has no constructor, so '‹arg1›( ... )' is no call
TKO0918	error	a store through the address of a temporary: the value is gone at the end of the statement
TKO0919	error	'‹arg1›' is ambiguous: more than one USING in effect declares it; qualify it
TKO0920	error	'#pragma reserve (asm)' belongs at module level, not inside a block
TKO0921	error	the capturing lambda's parameter '‹arg1›' cannot be of the generic's type parameter '‹arg2›'
TKO0922	error	'‹arg1›' is not visible here: it is declared inside a namespace; qualify it
TKO0923	error	'‹arg1›' is no namespace declared before this USING
TKO0924	error	recursive #define: '‹arg1›' names itself in its own body
TKO0925	error	type( ... ) has no type to build here: write type<T>( ... )
TKO0926	error	'‹arg1›' needs a copy constructor: its base has no constructor that takes no argument, so none can be made for it
TKO0927	error	this constructor of '‹arg1›' must call base( ... ): its base has no constructor that takes no argument
TKO0928	error	'‹arg1›' takes a number, not a '‹arg2›'
TKO0929	error	type( ... ) cannot build a '‹arg1›': its field '‹arg2›' is a var-len string, which only a constructor can fill
TKO0930	error	a whole array cannot be assigned or swapped: index it, as in 'a( i )'
TKO0931	warning	'=' is read as a comparison inside the argument of '‹arg1›', not as an assignment to its byref result; to assign, write '( ‹arg1›( ... ) ) = value'
TKO0932	error	'‹arg1›' returns its result by value, so a call to it cannot be assigned to
TKO0933	error	an 'any ptr' points at nothing with a type; cast it to a typed pointer before dereferencing it
TKO0934	error	'‹arg1›' is a property with only a setter: it can be assigned, not read
TKO0935	error	'‹arg1›' is not a const method, so a const object cannot call it
TKO0936	error	'‹arg1›' is not a procedure modifier; 'declare' takes const, static, virtual or abstract before the procedure keyword
TKO0937	error	'‹arg1›' needs an object, and '‹arg2›' has none: it is a static member
TKO0938	error	'‹arg1›' cannot take a '‹arg2›': convert it explicitly first
TKO0939	error	'‹arg1›' is a function: its result can be assigned only inside it
TKO0940	note	'‹arg1›' is imported by another file of this module; an import belongs to the file that writes it
TKO0941	error	'for each byref' cannot walk a string: a character has no stable address; walk it by value, or index it with 'for'
TKO0942	error	'case timeout' and 'case else' cannot both appear in one 'select channel': 'else' fires first, so the timeout is never reached
TKO0943	error	'spawn' needs a sub or function declared at module level, and '‹arg1›' is not one
TKO0944	error	a line number is not available in the fb dialect; name the line with a label
TKO0945	error	'‹arg1›' is already a constant or procedure of the enclosing scope, which no local may share
TKO0946	error	iif cannot choose between a ‹arg1› and a ‹arg2›: both results must be the same kind of string
TKO0947	error	'‹arg1›' is not inside ‹arg2›
TKO0948	error	there is no outer ‹arg2› for '‹arg1›' to leave
TKO0949	error	there is no label '‹arg1›' in this procedure
TKO0950	error	'*' dereferences a pointer, and this is not one
TKO0951	error	'@' takes the address of a variable, and a literal is not one
TKO0952	error	this procedure has no result, so its 'return' takes no value
TKO0953	error	a FOR counter must be a scalar variable, not a field, element, dereference or byref parameter
TKO0954	error	the diagnostics file '‹arg1›' is one of the inputs, and writing it would destroy it
TKO0955	error	'end ‹arg1›' closes no '‹arg1›' block
TKO0956	error	a second 'case else' -- a select has one, and it comes last
TKO0957	error	'as any' declares a parameter of any type; a definition must name the type
TKO0958	error	an 'operator cast' cannot convert to the type it is a member of
TKO0959	error	GET # and PUT # take no amount for a string or a whole array: its length is its own
TKO0960	error	the subscript ‹arg1› is outside the array's bounds, ‹arg2› to ‹arg3›
TKO0961	error	'‹arg1›' is already a namespace of the enclosing scope, which no local may share
TKO0962	error	clang reported success but wrote no object '‹arg1›'
TKO0963	error	a bare zstring or wstring is not passed or returned by value; use a pointer or byref
TKO0964	error	'select case' cannot take a '‹arg1›'; select on a field or a conversion of it
TKO0965	error	'‹arg1›' has a field with a constructor, which an initializer list cannot fill
TKO0966	error	a condition needs a number or a pointer, and this is a '‹arg1›'
TKO0967	error	'line input' reads into a string, and this is a '‹arg1›'
TKO0968	warning	implicit conversion: a '‹arg1›' from a '‹arg2›'; cast( ) it if that is meant
TKO0969	note	'nullptr' converts to every pointer type equally; name the one meant, as 'cptr( T ptr, nullptr )'
TKO0970	warning	passing a '‹arg2›' for a '‹arg1›' parameter; cast( ) it if that is meant
TKO0971	error	'‹arg1›' is a type, not a value
TKO0972	error	'‹arg1›' has no member named '‹arg2›': a '‹arg3›' has no members
TKO0973	error	a typed variadic parameter ('...') must be the last parameter
TKO0974	error	a typed variadic parameter ('...') takes no default value
TKO0975	error	'‹arg1›' is declared with a typed variadic last parameter ('...') in one place and without it in another
TKO0976	error	a TYPE's 'extern' clause takes "c", not "‹arg1›"
TKO0977	error	'select case as const' already has a case for the value ‹arg1›
TKO0978	error	'select case as const' needs an integer subject, and this is a '‹arg1›'
TKO0979	warning	overflow in constant conversion: the case value ‹arg1› does not fit in a '‹arg2›'
TKO0980	error	'‹arg1›' cannot take a ustring source; convert it with str( ) first
TKO0981	error	'‹arg1›' is not supported on this target; read a variadic argument list with 'cva_list', 'cva_start' and 'cva_arg'
TKO0982	error	'base( )' must be the first statement of the constructor
TKO0983	error	'‹arg1›' is ambiguous: more than one enum declares it; qualify it
TKO0984	warning	overflow in constant conversion: ‹arg1› does not fit in a '‹arg2›'
TKO0985	error	'‹arg1›' has a field with a default value, which an initializer list cannot fill
TKO0986	note	in expansion of '‹arg1›' here

Compiler limits and internal errors (TKO0990–TKO0999)

Id	Severity	Message
TKO0990	error	too many errors; stopping
TKO0991	error	input exceeds a compiler limit: ‹arg1›
TKO0992	error	not implemented in this build: ‹arg1›
TKO0993	error	internal compiler error in emission: ‹arg1›
TKO0994	error	internal compiler error: this ‹arg2› was not compiled (‹arg1› in this module); the build stops rather than leave it out
TKO0995	warning	internal compiler error: this ‹arg2› was not compiled (‹arg1› in this module) and is left out of the build
TKO0996	error	'‹arg1›' is a bare ‹arg2›, which has no length; write '‹arg2› * N' or '‹arg2› ptr'
TKO0997	error	'‹arg1›' is a procedure, not a type
TKO0998	error	'‹arg1›' cannot be a member of a union: ‹arg2›
TKO0999	error	'‹arg1›' is not a static member; call it through an object of its type

Interfaces (TKO1000–TKO1049)

Id	Severity	Message
TKO1000	error	'‹arg1›' does not implement '‹arg2›.‹arg3›'; add 'implements ‹arg2›.‹arg3›' to one of its methods
TKO1001	error	'‹arg1›' cannot implement '‹arg2›': ‹arg3› differ
TKO1002	error	'‹arg1›' is not an interface
TKO1003	error	interface '‹arg1›' has no member named '‹arg2›'
TKO1004	error	'‹arg1›' implements '‹arg2›.‹arg3›', but does not list '‹arg2›' after 'implements'
TKO1005	error	'‹arg2›.‹arg3›' is implemented twice in '‹arg1›'
TKO1006	error	interface '‹arg1›' is listed more than once
TKO1007	error	interface '‹arg1›' cannot be created; create a type that implements it
TKO1008	error	interface '‹arg1›' inherits itself
TKO1009	error	'‹arg1›' does not convert to '‹arg2›'‹arg3›
TKO1010	error	'‹arg1›' is ambiguous: both '‹arg2›' and '‹arg3›' declare it; cast to one of them
TKO1011	error	'‹arg2›.‹arg3›' is already implemented by base type '‹arg1›'; override that method instead
TKO1012	error	an interface reference cannot refer to a temporary; store the object in a variable first
TKO1013	error	'delete' cannot destroy through interface '‹arg1›'; cast to the object's type first
TKO1014	error	a static method cannot implement an interface member
TKO1015	error	interface type '‹arg1›' cannot appear in a foreign declaration
TKO1016	warning	'‹arg1›' is decided at compile time: it is always ‹arg2›
TKO1018	warning	'‹arg1›' implements '‹arg2›.‹arg3›' with different default arguments; calls through '‹arg2›' use the interface's
TKO1021	error	'trycast' converts to an interface or to a pointer to a type, not to '‹arg1›'
TKO1022	error	type argument '‹arg1›' does not implement '‹arg2›', which '‹arg3›' requires
TKO1023	error	the argument of '‹arg1›' must be an array, not '‹arg2›'

String slices (TKO1050–TKO1099)

Id	Severity	Message
TKO1050	error	'‹arg1›' cannot be sliced: it is not a string, a string slice or a zstring/wstring pointer
TKO1051	error	slice ‹arg1› is outside '‹arg2›' (0 to ‹arg3›)
TKO1052	error	a const ‹arg1› cannot convert to a mutable ‹arg1›
TKO1053	error	a mutable ‹arg1› parameter needs a ‹arg2› variable, not '‹arg3›'
TKO1054	error	a ‹arg1› cannot be ‹arg2›
TKO1055	error	type '‹arg1›' holds slice field '‹arg2›' and must be declared 'as view'
TKO1056	error	cannot take the address of slice '‹arg1›' except to pass it
TKO1057	error	'‹arg1›' outlives '‹arg2›', which this slice borrows from
TKO1058	error	this slice borrows from a temporary that ends with the statement
TKO1059	error	cannot return a slice of ‹arg1›
TKO1060	error	‹arg1› cannot capture slice '‹arg2›'
TKO1061	error	a slice stored through byref parameter '‹arg1›' must outlive the call
TKO1062	error	'‹arg1›' cannot be changed while slice '‹arg2›' borrows from it (last used at line ‹arg3›)

See also

• Compatibility
• Debugging