This allows expressions such as ".foo" and ".foo(1)" to refer to
static variables and static methods, respectively, as well as enum
cases.
To get here, rework the parsing of delayed identifier expressions a
bit, so that the argument itself is part of the delayed argument
expression rather than a separate call expression. This simplifies
both the handling of patterns of this form and the type checker, which
can now user simpler constraints.
If we really want to support (.foo)(1), we can make that work, but it
seems unnecessary and perhaps confusing.
Swift SVN r10626
Previously, the Parser and BranchStmt typedef-ed ExprStmtOrDecl as a pointer union. Using typedef made the objects compatible, but did not allow us to extend the type with helper methods, such as getSourceRange(), which is something you can get on all of the AST objects. This patch introduces ASTNode that subclasses from PointerUnion and is used by both parser and BranchStmt.
Swift SVN r9971
wide
Currently integer literals are 64-bit. In order to allow checking for overflow
while converting an integer literal to swift.UInt/Int* types we need at least
65 bits. But floating point numbers (Float32, Float64, Float80) are
BuiltinIntegerLiteralConvertible. In order to allow spelling large floating
point constants, we allow 136-bit literals.
Rationale: 128 bits are enough to represent the absolute value of min/max IEEE
Binary32, and we need 1 bit to represent the sign. 136 is 129 rounded to the
next 8 bits.
The plan is to have builtins that do the overflow check and convert 136-bit
numbers to the required width. We need these builtins for both integers and
floating point numbers to ensure that 136-bit numbers are folded into sane
constants in SIL and don’t escape to LLVM IR.
Swift SVN r9253
Now that we have a solid Optional-based story for dynamic casts, it's no longer needed, and can be expressed as '(x as T)!'. Future refinement of the 'as' syntax will deal with the unfortunate extra parens.
Swift SVN r9181
As with the monadic '?', we treat any left-bound '!' as a postfix
operator. Currently, it extracts the value of its optional
subexpression, failing at run-time if the optional is empty.
Swift SVN r8948
Parse '_' as a DiscardAssignmentExpr. Type-check it as an lvalue, and check that it only appears in the LHS of AssignExprs. During matching pattern resolution, convert it into an AnyPattern. In SILGen, when we see '_' in the LHS of an assignment, ignore the corresponding RHS rvalue.
Swift SVN r8848
This is more naturally where they belong in the grammar, allows for nice chained transformation calls like 'x.map { ... }.filter { ... }', and lets us remove a bunch of kludgy fixits to try to handle the 'wanted to parse postfix but didn't' case. Fixes <rdar://problem/14098078>. Also fix the special-case handling of "builder pattern" style method chains to parse 'x\n.method{' as a chained method call, like it does 'x\n.method(' or 'x\n.property['. (There's got to be a better way...)
Swift SVN r8828
Doug points out it's not necessary. Even without a deeper syntactic renovation for casts this still signals that it's the preferred cast form going forward.
Swift SVN r8812
Though we plan to revamp the casting syntax, our general plan is for this form of cast, which does a conditional cast and returns an Optional<T> result, to be the one that survives. Parse the status-quo syntax 'x as? T' and type-check it. While we're here, refresh some fixits for redundant casts that referred to the now defunct 'as T' coercion syntax to completely remove whatever cast was in the source code.
Swift SVN r8805
Require that either T be default constructible or that the user provide a closure that maps indices to initial values. We don't actually call the closure yet to initialize the array; that's blocked on function abstraction difference <rdar://problem/13251236>.
Swift SVN r8801
These are the terms sent out in the proposal last week and described in
StoredAndComputedVariables.rst.
variable
anything declared with 'var'
member variable
a variable inside a nominal type (may be an instance variable or not)
property
another term for "member variable"
computed variable
a variable with a custom getter or setter
stored variable
a variable with backing storage; any non-computed variable
These terms pre-exist in SIL and IRGen, so I only attempted to solidify
their definitions. Other than the use of "field" for "tuple element",
none of these should be exposed to users.
field
a tuple element, or
the underlying storage for a stored variable in a struct or class
physical
describes an entity whose value can be accessed directly
logical
describes an entity whose value must be accessed through some accessor
Swift SVN r8698
Introduce a bit in Expr to indicate whether the expression is implicit and decouple the implicitness
of an expression from whether it has a source location or not.
This allows implicit expressions to be able to point at the source location where they originated from.
It also allows decoupling the implicitness of a parent from its children, so for example, an implicit CallExpr
can have an explicit parameter value.
Swift SVN r8600
AnyFunctionRef is a universal function reference that can wrap all AST nodes
that represent functions and exposes a common interface to them. Use it in two
places in SIL where CapturingExpr was used previously.
AnyFunctionRef allows further simplifications in other places, but these will
be done separately.
Swift SVN r8239
and remove DeclContext base class from FuncDecl, ConstructorDecl and
DestructorDecl
This decreases the number of DeclContexts to 7 and allows us to apply
alignas(8) to DeclContext.
Swift SVN r8186
MemberRefExpr now uses ConcreteDeclRef to refer to its member, which
includes the substitutions and obviates the need for
GenericMemberRefExpr.
Swift SVN r7842
