version of the new CTP_ReturnStmt conversion, used to generate return-specific
diagnostics. Now that we have a general solution, we can just use that.
This improves diagnostics in returns for accessors, since they were apparently
not getting the bit set.
Swift SVN r30665
The defer body func is only ever fully applied, so SILGen can avoid allocating a closure for it if it's declared as a 'func', making it slightly more efficient at -Onone.
Swift SVN r30638
Requiring a variadic parameter to come at the end of the parameter
list is an old restriction that makes no sense nowadays, and which we
had all thought we had already lifted. It made variadic parameters
unusable with trailing closures or defaulted arguments, and made our
new print() design unimplementable.
Remove this restriction, replacing it with a less onerous and slightly
less silly restriction that we not have more than one variadic
parameter in a given parameter clause. Fixes rdar://problem/20127197.
Swift SVN r30542
To support this, make 'try' and 'try!' no longer IdentityExprs
and give them a common base class to simplify the sorts of
analyses and transformations that do want to treat them
as identity-like.
Note that getSPE() still looks through normal 'try', since
the overwhelming proportion of clients will consider it
semantically equivalent to the undecorated expression.
Change getValueProvidingExpr() to look through try!, since
it's allowed to return something with slightly different
semantics, and use it in the unused-result diagnostic.
Fixes a large number of bugs, mostly uncaught, with SILGen
peepholes that use getSPE() and therefore were accidentally
looking through try!. <rdar://21515402>
Swift SVN r30224
into the body of the for statement. Instead of ripping the body of the closureexpr
out and putting it into the C Style for, wrap up the closureExpr into a call. This
avoids breaking AST invariants because the ClosureExpr will be the DeclContext for
anything inside of it.
This fixes <rdar://problem/21679557> compiler crashes on "for{{"
... which was Practical Swift's shortest crasher.
Swift SVN r29916
Just like enums with integer raw values can get autoincrementing case values,
enums with string raw values get the name of the element. The name is /not/
prefixed with the enum type because the purpose is presumably to interoperate
with a string-based system, which may require either writing or printing the
raw value as a string.
If an enum's raw type is both integer literal convertible and string literal
convertible, the integer side wins. That is, elements without raw values
will get auto-incremented integer values, rather than string values, and will
produce an error if an auto-incremented value cannot be generated.
rdar://problem/15819953
Swift SVN r29542
This makes it clearer that expressions like "foo.myType.init()" are creating new objects, instead of invoking a weird-looking method. The last part of rdar://problem/21375845.
Swift SVN r29375
Instead, provide the location of the { in a closure expr to the argument formation as
part of the datastructure already used to manage implicit closure arguments in the parser.
Swift SVN r28818
instead of being an expression.
To the user, this has a couple of behavior changes, stemming from its non-expression-likeness.
- #available cannot be parenthesized anymore
- #available is in its own clause, not used in a 'where' clause of if/let.
Also, the implementation in the compiler is simpler and fits the model better. This
fixes:
<rdar://problem/20904820> Following a "let" condition with #available is incorrectly rejected
Swift SVN r28521
Verify that this bit is set during type-checking on
every ApplyExpr, and fix the remaining locations where
we weren't doing coverage testing on expressions; most
of these were harmless, but it's better to be safe.
Swift SVN r28509
I debated making isBodyThrowing() do this, but decided that
(1) the better recovery mode is to assume that the function
can throw but (2) making isBodyThrowing() return true on an
invalid function would be really weird.
Tested by the crash testsuite.
Swift SVN r27902
a list of their elements, instead of abusing TupleExpr/ParenExpr
to hold them.
This is a more correct representation of what is going on in the
code and produces slightly better diagnostics in obscure cases.
However, the real reason to fix this is that the ParenExpr's that
were being formed were not being installed into the "semantic"
view of the collection expr, not getting type checked correctly,
and led to nonsensical ParenExprs. These non-sensical ParenExprs
blocked turning on AST verification of other ones.
With this fixed, we can finally add AST verification that
IdentityExpr's have sensible types.
Swift SVN r27850
Change how MemberRefExpr and DynamicMemberRefExpr calculate their starting locations so
that even if their base expression is implicit, they will use its starting location if
that location is valid rather than falling back to the start of the name of the member.
Without this change, the Fix-It to suggest wrapping a nested member reference (where the
base is an implicit LoadExpr) in 'if #available(...)' would be inserted in the middle of
the expression.
rdar://problem/20662960
Swift SVN r27799
Now we bind the defer body into a ClosureExpr and emit it at the point of
the defer. At any exit points out of the controlled region, we emit a call
to the closure.
This should cover any problems where expressions cannot be emitted multiple times.
However, this is dramatically more complex than the obvious implementation, so I
hope this patch can be reverted.
Swift SVN r27767
Add syntax "[#Color(...)#]" for object literals, to be used by
Playgrounds for inline color wells etc. The arguments are forwarded to
the relevant constructor (although we will probably change this soon,
since (colorLiteralRed:... blue:... green:... alpha) is kind of
verbose). Add _ColorLiteralConvertible and _ImageLiteralConvertible
protocols, and link them to the new expressions in the type checker.
CSApply replaces the object literal expressions with a call to the
appropriate protocol witness.
Swift SVN r27479
The API review list found it confusing that if #os() and #if os() looked so similar, so
change the availability checking query to be spelled #available:
if #available(iOS >= 9.0, *) {
...
}
Swift SVN r26995
On platforms that are not explicitly mentioned in the #os() guard, this new '*'
availability check generates a version comparison against the minimum deployment target.
This construct, based on feedback from API review, is designed to ease porting
to new platforms. Because new platforms typically branch from
existing platforms, the wildcard allows an API availability check to do the "right"
thing (executing the guarded branch accessing newer APIs) on the new platform without
requiring a modification to every availability guard in the program.
So, if the programmer writes:
if #os(OSX >= 10.10, *) {
. . .
}
and then ports the code to iOS, the body will execute.
We still do compile-time availability checking with '*', so the compiler will
emit errors for references to potentially unavailable symbols in the body when compiled
for iOS.
We require a '*' clause on all #os() guards to force developers to
"future proof" their availability checks against the introduction of new a platform.
Swift SVN r26988
Previously some parts of the compiler referred to them as "fields",
and most referred to them as "elements". Use the more generic 'elements'
nomenclature because that's what we refer to other things in the compiler
(e.g. the elements of a bracestmt).
At the same time, make the API better by providing "getElement" consistently
and using it, instead of getElements()[i].
NFC.
Swift SVN r26894
Rename 'assignment' attribute of infix operators to 'mutating'. Add
'has_assignment' attribute, which results in an implicit declaration of
the assignment version of the same operator. Parse "func =foo"
declaration and "foo.=bar" expression. Validate some basic properties of
in-place methods.
Not yet implemented: automatic generation of wrapper for =foo() if foo()
is implemented, or vice versa; likewise for operators.
Swift SVN r26508
If the placeholder is a typed one, parse its type string into a TypeRepr,
resolve it during typechecking and set it as the type for the associated EditorPlaceholderExpr.
Swift SVN r26215
We parse 'try' as if it were a unary operator allowed on an
arbitrary element of an expr-sequence, but sequence-folding
constrains it to never appear on the RHS of most operators.
We do allow it on the RHS of an assignment or conditional
operator, but not if there's anything to the right which
was not parsed within the RHS.
We do this for assignments so that
var x = try whatever
and
x = try whatever
both work as you might expect.
We do this for conditionals because it feels natural to
allow 'try' in the center operand, and then disallowing it
in the right operand feels very strange.
In both case, this works largely because these operators are
assumed to be very low-precedence; there are no standard
operators which would parse outside the RHS. But if you
create one and use 'try' before it, we'll diagnose it.
Swift SVN r26052
Corrected several places where compiler generated AST nodes were not properly
marked as implicit.
For interpolated strings also fixed string segment locations and made sure
the first and last segments are preserved in AST even if they are empty.
Swift SVN r25983
