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dmd.delegatize

Implements conversion from expressions to delegates for lazy parameters.

Specification Lazy Parameters

Authors:

Walter Bright

License:

Boost License 1.0

Source delegatize.d

Documentation https://dlang.org/phobos/dmd_delegatize.html

Coverage https://codecov.io/gh/dlang/dmd/src/master/src/dmd/delegatize.d

Expression toDelegate(Expression e, Type t, Scope* sc);

Convert expression into a delegate.

Used to convert the argument to a lazy parameter.

Parameters:

Expression `e`	argument to convert to a delegate
Type `t`	the type to be returned by the delegate
Scope* `sc`	context

Returns:

A delegate literal

bool lambdaCheckForNestedRef(Expression e, Scope* sc);

Look for references to variables in a scope enclosing the new function literal.

Essentially just calls checkNestedReference() for each variable reference in e`.

Parameters:

Scope* `sc`	context
Expression `e`	expression to check

Returns:

true if error occurs.

bool ensureStaticLinkTo(Dsymbol s, Dsymbol p);

See if context s is nested within context p, meaning it p is reachable at runtime by walking the static links. If any of the intervening contexts are function literals, make sure they are delegates.

Parameters:

Dsymbol `s`	inner context
Dsymbol `p`	outer context

Returns:

true means it is accessible by walking the context pointers at runtime

References for static links see https://en.wikipedia.org/wiki/Call_stack#Functions_of_the_call_stack

Library Reference

dmd.delegatize