Richard Smith bf5d2a2ace Add support for -> auto deduced return types. (#7931) ...

The return type is deduced from the function's `return` statements
(currently required to all have the same type), or from its first
`returned var`. Calls to generic functions with deduced return types are
not yet supported.

When a function has a deduced return type, we defer the return type
portion of the callee pattern match until deduction, and during
deduction we extend the decl block and the pattern block with the
return-related instructions.

Conversions for `return expr;` statements are deferred until the return
type has been deduced. The design requires that we take the common type
of the returned types as the deduced return type, so we can't in general
perform any conversions for returned expressions until we reach the end
of the function. This is accomplished by inserting a `splice_block`
where the conversions will go, and later updating that instruction to
contain the conversion.

Assisted-by: Claude Opus 5.5 via Antigravity

2026-10-15 00:30:09 +00:00

..

access.cpp

Don't include expensive Clang headers in widely-included headers (#7319)

2026-06-07 16:27:22 +00:00

access.h

Don't include expensive Clang headers in widely-included headers (#7319)

2026-06-07 16:27:22 +00:00

call.cpp

Rename GenericClassType to ParameterizedClassType (#7953)

2026-10-11 23:09:12 +00:00

call.h

Don't include expensive Clang headers in widely-included headers (#7319)

2026-06-07 16:27:22 +00:00

constant.cpp

Initial support for C++ function pointers (#7788)

2026-09-30 00:06:06 +00:00

constant.h

Don't include expensive Clang headers in widely-included headers (#7319)

2026-06-07 16:27:22 +00:00

context.cpp

Include the ASTContext header where it's used (#7701)

2026-09-02 17:35:31 +00:00

context.h

Create modules for header imports. (#7613)

2026-08-06 13:32:37 +00:00

custom_type_mapping.cpp

Move C++ interop related check code files to a cpp dir (#6065)

2025-09-17 09:31:36 +00:00

custom_type_mapping.h

Move C++ interop related check code files to a cpp dir (#6065)

2025-09-17 09:31:36 +00:00

diagnostic_consumer.cpp

Add a flag to build a single ASTContext shared across all compilations (#7567)

2026-07-28 00:19:40 +00:00

diagnostic_consumer.h

Add a flag to build a single ASTContext shared across all compilations (#7567)

2026-07-28 00:19:40 +00:00

diagnostic_listener.h

Add a flag to build a single ASTContext shared across all compilations (#7567)

2026-07-28 00:19:40 +00:00

export.cpp

Add support for -> auto deduced return types. (#7931)

2026-10-15 00:30:09 +00:00

export.h

Rename GenericClassType to ParameterizedClassType (#7953)

2026-10-11 23:09:12 +00:00

generate_ast.cpp

Fix exporting of names to C++ after a lookup failure. (#7933)

2026-10-13 18:43:50 +00:00

generate_ast.h

Create modules for header imports. (#7613)

2026-08-06 13:32:37 +00:00

impl_lookup.cpp

Support for converting a function to a C++ function pointer (#7789)

2026-09-30 21:13:36 +00:00

impl_lookup.h

Pass SpecificInterface through custom and C++ witness generation (#7784)

2026-09-15 21:23:28 +00:00

import.cpp

Add a Core.Array class type, and make array refer to it. (#7892)

2026-10-06 17:23:49 +00:00

import.h

Initial support for C++ function pointers (#7788)

2026-09-30 00:06:06 +00:00

location.cpp

Split up C++ diagnostic emitter and factor it out. (#7558)

2026-07-24 20:14:50 +00:00

location.h

Split up C++ diagnostic emitter and factor it out. (#7558)

2026-07-24 20:14:50 +00:00

macros.cpp

Don't crash if a macro expands to an erroneous expression. (#7652)

2026-08-19 00:47:03 +00:00

macros.h

Fix handling of recursive macros. (#7593)

2026-07-31 20:09:03 +00:00

operators.cpp

Add a Core.Array class type, and make array refer to it. (#7892)

2026-10-06 17:23:49 +00:00

operators.h

Don't form a bound method when calling a C++ operator. (#7345)

2026-06-11 21:49:20 +00:00

overload_resolution.cpp

Use the plain identifier for Carbon names in C++ (#7897)

2026-10-05 17:44:20 +00:00

overload_resolution.h

Don't include expensive Clang headers in widely-included headers (#7319)

2026-06-07 16:27:22 +00:00

thunk.cpp

Rename CalleeFunctionInfo to clarify its narrow applicability (#7899)

2026-10-05 20:40:16 +00:00

thunk.h

Rename CalleeFunctionInfo to clarify its narrow applicability (#7899)

2026-10-05 20:40:16 +00:00

type_mapping.cpp

Add a Core.Array class type, and make array refer to it. (#7892)

2026-10-06 17:23:49 +00:00

type_mapping.h

Add interop support for naming and "calling" C++ templates. (#6474)

2025-12-15 17:45:01 +00:00