Qore Programming Language Reference Manual  0.8.12.9
Warnings

Warnings give the programmer information about possible errors in Qore code.

Warnings can be enabled using the -W command-line option (see qore Executable Command-Line Processing for more information) or by using the %enable-all-warnings or %enable-warning parse directives.

Command Line Example
prompt$ qore -wdeprecated -wduplicate-hash-key script.q
Qore Code Example
%enable-warning deprecated
%enable-warning duplicate-hash-key
%disable-warning excess-args
List of All Warnings

call-with-type-errors

Raised when the parser determines that the argument types of a function or method call are such that the operation is guaranteed to produce a constant value

Since
Qore 0.8.0

deprecated

Raised when deprecated functionality is accessed.

See also
"Deprecated" Functions
Since
Qore 0.8.0

duplicate-block-vars

Raised when a program declares a local variable more than once in the same block; note that this is not a warning but rather an error when %assume-local or %new-style parse options are set

Since
Qore 0.8.2

duplicate-global-vars

Raised when a program declares a global variable more than once

Since
Qore 0.5.2

duplicate-hash-key

Raised when an immediate hash is declared and at least one of the keys is repeated

Since
Qore 0.8.0

duplicate-local-vars

This warning is raised when a local variable with the same name is declared in a subblock (ie another local variable with the same name is reachable in the same lexical scope); note that this warning can raise false positives if the programmer is used to redeclaring the same variable names in subblocks

See also
duplicate-block-vars
Since
Qore 0.5.2

excess-args

Raised when a function or method call is made with more arguments than are used by the function or method

Since
Qore 0.8.0

invalid-operation

Raised when the parser determins that the types of an operation are such that the operation is guaranteed to produce no value; this warning can only be raised when type information is available at parse time

Since
Qore 0.8.0

module-only

This warning is raised when a feature that is only valid in a user module is used in code that is not in a user module, for example, declaring a class or namespace The "public" Keyword

Since
Qore 0.8.4

non-existent-method-call

Warning is raised when the given method cannot be found in the class at parse time; this is a warning because the object could be a subclass that has the given method implemented, in which case the call will succeed at run time. Use the cast<>() operator to avoid this warning

Since
Qore 0.8.0

return-value-ignored

Raised when a function or method call is made with no side effects and the return value is ignored

Since
Qore 0.8.0

undeclared-var

This warning is raised when a program uses a variable that has not been declared with my or our

Since
Qore 0.5.2

unknown-warning

This warning is raised when a program tries to enable or disable an unknown warning

Since
Qore 0.5.2

unreachable-code

Raised when code is defined that can never be executed (for example, code following a return or thread_exit statement)

Since
Qore 0.5.2

unreferenced-variable

Raised when a variable is declared but never referenecd

Since
Qore 0.8.2

warning-mask-unchanged

This warning is raised when a program tries to change the warning mask with parse options, but the warnings are locked

Since
Qore 0.5.2