basic docs for new async/await semantics

fix error return traces for async calls of blocking functions

remove `cancel`

codegen for async call of blocking function

add compile error for await in exported function

rename behavior test files

respect local variable alignment in async functions

get_struct_type accepts field alignment overrides

avoid the word "coroutine", they're "async functions"

organize TODOs

alignment of structs no longer depends on LLVM

Merge remote-tracking branch 'origin/master' into rewrite-coroutines

fix async function frames not aligned enough

fix no-longer-correct `nonnull` attribute on merge err ret traces fn

fix cancel invoking branch on undefined memory

all tests passing

fix canceling async functions which have error return tracing

add test case for typical async/await usage

fix returning a const error from async function

fix try in an async function with error union and non-zero-bit payload

fix combining try with errdefer cancel

fix cancel inside an errdefer

fix passing string literals to async functions

closer to std lib event stuff working

fix var args call on non-generic function

fix segfault with var args

better compile errors when frame depends on itself

add compile error for unable to determine async fn frame

async functions in single threaded mode do not use atomic ops

more debuggable safety for awaiting twice

cancel, defer, errdefer all working as intended now

cancel works on non-pointers

clean up the bitcasting of awaiter fn ptr

implement cancel

fix awaiting when result type is a struct

error return trace across suspend points

passing the error return trace async function test

improve async function semantics

async functions have error return traces where appropriate

add a src() method to AstNode to aid debugging

delete IrInstructionMarkErrRetTracePtr

support async functions with inferred error sets

refactor logic for determining if there is a frame pointer

Merge remote-tracking branch 'origin/master' into rewrite-coroutines

simpler, less memory intensive suspend/resume implementation

move state from ZigFn to CodeGen to save memory

suspension points inside branching control flow

fix regression in calling extern functions

implement `@asyncCall` which supports async function pointers

add compile error for calling async function pointer

add runtime safety for resuming an awaiting function

add compile error for async call of function pointer

implement async functions returning structs

add heap allocated async function frame test

Merge remote-tracking branch 'origin/master' into rewrite-coroutines

Merge branch 'master' into rewrite-coroutines

implement async await and return

more passing coroutine tests

fix calling an inferred async function

reimplement async with function splitting instead of switch

improve support for anyframe and anyframe->T

add the `anyframe` and `anyframe->T` types

async functions return void, no more GetSize resume block

`@frameSize` works via PrefixData

implement `@frameSize`

implement `@frame` and `@Frame`

calling an inferred async function

implement local variables in async functions

add error for function with ccc indirectly calling async function

inferring async from async calls

Merge remote-tracking branch 'origin/master' into rewrite-coroutines

fix multiple coroutines existing clobbering each other

fix suspend at end of function

disable segfault handler when panicking

fix wrong calling convention on async resume

implement async function parameters

implement coroutine resume

simple async function passing test

returning from async fn adds bad resume safety

fix not jumping to entry

remove errors for async calling convention

simple async function call working

remove coroutines implementation and promise type

Merge branch 'fengb-tokenize-ampamp'

fix usingnamespace

zig build: add valgrind cli options

closes #2916

WIN32 -> _WIN32

back to msvc as the default C ABI on Windows

fixed slice length in getEnvVarOwned

libc headers before C language headers, and disable libunwind on arm32

Merge branch 'update-musl'

rename internal names regarding `usingnamespace`

Merge branch 'JohnathanFL-master'

Merge branch 'msvc-libc-2064' of https://github.com/dimenus/zig into dimenus-msvc-libc-2064

cmake: allow user to select static vs dynamic LLVM

retire the example/ folder, rename test-build-examples to "standalone"

fix documentation regarding mixing object files

Merge branch 'SamTebbs33-main-return'

fixed size of ZigClangAPValue on mingw-w64