1.3 KiB
Static lambdas
Summary
Support lambdas that disallow capturing state from the enclosing scope.
Motivation
Avoid unintentionally capturing state from the enclosing context.
Detailed design
A lambdas with static cannot capture state from the enclosing scope.
As a result, locals, parameters, and this from the enclosing scope are not available within a static lambda.
A static lambda cannot reference instance members from an implicit or explicit this or base reference.
A static lambda may reference static members from the enclosing scope.
A static lambda may reference constant definitions from the enclosing scope.
nameof() in a static lambda may reference locals, parameters, or this or base from the enclosing scope.
Accessibility rules for private members in the enclosing scope are the same for static and non-static lambdas.
No guarantee is made as to whether a static lambda definition is emitted as a static method in metadata. This is left up to the compiler implementation to optimize.
A non-static local function or lambda can capture state from an enclosing static lambda but cannot capture state outside the enclosing static lambda.
Removing the static modifier from a lambda in a valid program does not change the meaning of the program.