Commit Graph

329 Commits (a35b366eb64272c6d4646aedc035a837ed0c3cb0)

Author SHA1 Message Date
Andrew Kelley 54138d9e82 add test for union with 1 void field being 0 bits 2017-12-04 02:05:33 -05:00
Andrew Kelley 084911d9b3 add test for @sizeOf on extern and packed unions 2017-12-04 02:04:08 -05:00
Andrew Kelley fce435db26 fix abi alignment of union-enums not counting tag type
add more tests for unions

See #618
2017-12-04 00:32:12 -05:00
Andrew Kelley 5a8367e892 rename @EnumTagType to @TagType. add tests for union-enums
See #618
2017-12-03 22:36:01 -05:00
Andrew Kelley 0ad1239522 rework enums and unions and their relationship to each other
* @enumTagName renamed to @tagName and it works on enums and
   union-enums
 * Remove the EnumTag type. Now there is only enum and union,
   and the tag type of a union is always an enum.
 * unions support specifying the tag enum type, and they support
   inferring an enum tag type.
 * Enums no longer support field types but they do support
   setting the tag values. Likewise union-enums when inferring
   an enum tag type support setting the tag values.
 * It is now an error for enums and unions to have 0 fields.
 * switch statements support union-enums

closes #618
2017-12-03 20:43:56 -05:00
Andrew Kelley 137c8f5e8a ability to set tag values of enums
also remove support for enums with 0 values

closes #305
2017-12-02 22:32:39 -05:00
Andrew Kelley 98237f7c0b casting between integer and enum only works via tag type
See #305
2017-12-02 17:12:37 -05:00
Andrew Kelley 264c86853b packed structs can have enums with explicit tag types
See #305
2017-12-01 00:34:29 -05:00
Andrew Kelley b62e2fd870 ability to specify tag type of enums
see #305
2017-11-30 22:08:11 -05:00
Andrew Kelley 716b0b8655 fix capturing value of switch with all unreachable prongs
closes #635
2017-11-29 21:34:17 -05:00
Andrew Kelley 5d2ba056c8 fix codegen for union init with runtime value
see #144
2017-11-16 22:06:08 -05:00
Andrew Kelley e26ccd5166 debug safety for unions 2017-11-16 21:15:15 -05:00
Andrew Kelley 018cbff438 unions have a secret field for the type
See #144
2017-11-15 22:52:47 -05:00
Andrew Kelley f276fd0f37 basic union support
See #144
2017-11-15 13:04:18 -05:00
Andrew Kelley 4f8c26d2c6 fix enum sizes too large
closes #598
2017-11-08 21:44:10 -05:00
Andrew Kelley 634e8713c3 add @memberType and @memberName builtin functions
see #383

there is a plan to unify most of the reflection into 2
builtin functions, as outlined in the above issue,
but this gives us needed features for now, and we can
iterate on the design in future commits
2017-11-06 22:07:19 -05:00
Andrew Kelley f0d755153d add compile-time reflection for function arg types
See #383
2017-11-04 16:20:02 -04:00
Andrew Kelley a31b23c46b more compile-time type reflection
See #383
2017-11-03 00:00:57 -04:00
Andrew Kelley 4c306af4eb add test case for previous commit 2017-10-27 01:22:48 -04:00
Andrew Kelley 643ab90ace add maximum value for @setAlignStack 2017-10-23 22:33:00 -04:00
Andrew Kelley 175893913d fix compiler crash regarding type name of undefined
See #547
2017-10-21 13:14:10 -04:00
Andrew Kelley 3c6eff465d fix tests on linux and macos 2017-10-03 01:14:29 -04:00
Andrew Kelley f1bd02e6f4 add @setAlignStack builtin 2017-10-03 00:29:27 -04:00
Andrew Kelley ec40542c44 windows: alignstack=16 on every function
See #302
2017-10-02 09:55:49 -04:00
Andrew Kelley 6f250f568a workaround llvm bug for windows alignment
See #302
2017-09-30 23:42:44 -04:00
Andrew Kelley c6295fe9ab remove zigrt
adds test case for #394

partially reverts a32b5929cc
2017-09-30 20:21:57 -04:00
Marc Tiehuis 9dfe217be3 Allow 128-bit hex float literals
Closes #499.
2017-09-28 23:33:36 +13:00
Andrew Kelley 14cda27b64 depend on embedded SoftFloat-3d instead of __float128
See #302
See #467
2017-09-14 01:46:47 -04:00
Andrew Kelley d9eabde319 add Child property of slice type
also rename child field to Child for pointer and array
2017-09-13 14:30:57 -04:00
Andrew Kelley b00b7bd290 variables are allowed to be pointers to opaque 2017-09-10 00:34:44 -04:00
Andrew Kelley 9dfbdeace6 add import test 2017-09-09 22:54:50 -04:00
Andrew Kelley 4c78142af1 rename some behavior tests 2017-09-09 22:53:32 -04:00
Andrew Kelley 9fb4d1fd6c std: os.ChildProcess knows when its child died
using signal handlers
2017-09-07 23:10:51 -04:00
Andrew Kelley 3ff465e288 add OpaqueType builtin
closes #326
2017-09-05 18:51:07 -04:00
Andrew Kelley 67b6dd28ec allow array literals to have size and fix comptime bug 2017-08-31 16:30:46 -04:00
Andrew Kelley 052b4ae941 align syntax: align(4) instead of align 4
closes #37
2017-08-30 04:54:33 -04:00
Andrew Kelley 010b725bde add alignment field to pointer type 2017-08-30 02:41:27 -04:00
Andrew Kelley 5482f9f9e8 when getting an element pointer, use the best alignment
type we can figure out is safe to use

See #37
2017-08-30 02:25:41 -04:00
Andrew Kelley 56cc62a9c7 @ptrCast preserves larger alignment if applicable
See #37
2017-08-30 01:12:47 -04:00
Andrew Kelley fa9006f8d1 generic functions can access comptime args in align value
See #37
2017-08-30 00:46:38 -04:00
Andrew Kelley c2357830b4 add "child" field to pointer type 2017-08-30 00:17:11 -04:00
Andrew Kelley b35dad88b4 add tests for function alignment handling
See #37
2017-08-30 00:06:14 -04:00
Andrew Kelley 2d57622355 add test for @alignCast on a slice
See #37
2017-08-29 23:39:54 -04:00
Andrew Kelley 898d65baa9 more alignment improvements
* add alignment capability for fn protos
 * add @alignCast
 * fix some ast rendering code
 * fix some ir rendering code
 * add error for pointer cast increasing alignment
 * update allocators in std to correctly align

See #37
2017-08-29 23:33:25 -04:00
Andrew Kelley 816689a3b1 ptrCast gives compile error for increasing alignment
See #37
2017-08-29 16:52:31 -04:00
Andrew Kelley be94299666 prevent implicitly increasing pointer alignment
See #37
2017-08-29 15:19:15 -04:00
Andrew Kelley 1116d82197 fix bitfield pointer syntax
See #37
2017-08-29 08:35:51 -04:00
Andrew Kelley c5c9d98065 introduce align keyword
* remove `@setGlobalAlign`
 * add align keyword for setting alignment on functions and
   variables.
 * loads and stores use alignment from pointer
 * memcpy, memset use alignment from pointer
 * add syntax for pointer alignment
 * slices can have volatile
 * add u2, i2 primitives
 * ignore preferred align and use abi align everywhere
 * back to only having alignOf builtin.
   preferredAlignOf is too tricky to be useful.
   See #432. Partial revert of
   e726925e80.

See #37
2017-08-29 07:51:34 -04:00
Andrew Kelley d7a539906d Merge branch 'embed-lld'
Zig now depends on LLVM 5.0.0.

For the latest version that supports LLVM 4.0.1, use
2a49c876be.

Unfortunately we had to embed LLD into Zig due to some
MACH-O related LLD bugs. One of them is already upstream
and another is awaiting feedback on the llvm-dev mailing
list.

You can use cmake option -DZIG_FORCE_EXTERNAL_LLD=ON to
still use external LLD if you want to live with the MACH-O
bugs or if your system LLD is patched.

Closes #273
2017-08-28 04:09:09 -04:00
Andrew Kelley ff2c794612 all behavior tests passing for macos
See #273
2017-08-27 05:15:24 -04:00
Andrew Kelley 29a418c9d5 progress toward tests passing on MacOS 2017-08-27 00:11:09 -04:00
Andrew Kelley 40feecb3e4 fixups from previous commit
See #396
2017-08-26 13:51:51 -04:00
scurest 5bc877017e use most_aligned_member+padding to represent enum unions 2017-08-26 13:48:16 -04:00
Andrew Kelley e726925e80 remove @alignOf and add @cAbiAlignOf and @preferredAlignOf
See #396
2017-08-26 13:29:24 -04:00
Andrew Kelley db613d38f0 implement comptime bitcasting from array 2017-08-25 20:05:10 -04:00
Andrew Kelley 4d8269f69f fix some casts on const data causing segfault 2017-08-25 19:54:20 -04:00
Andrew Kelley 09bd4a9a86 compile-time f32, f64 operations are now correctly lossy
previously we used the bigfloat abstraction to do all
compile-time float math. but runtime code and comptime code
are supposed to get the same result. so now if you add a
f32 to a f32 at compile time it does it with f32 math
instead of the bigfloat. float literals still get the
bigfloat math.

closes #424
2017-08-20 01:04:51 -04:00
Andrew Kelley caaeab9882 add setEvalBranchQuota builtin function 2017-08-19 17:10:29 -04:00
Andrew Kelley cd2f65ff6a add compile error for globally shadowing a primitive type
closes #423
2017-08-19 02:02:25 -04:00
Andrew Kelley 1b5d61bee9 fix bitCast for big integers
and make bigfloat use __float128
2017-08-17 22:52:12 -04:00
Andrew Kelley 2173e1f457 fix big integer shifting by large number 2017-08-17 22:01:19 -04:00
Andrew Kelley e63d864c1e add compiler_rt functions for f128
* __letf2
 * __cmptf2
 * __getf2
 * __unordtf2
 * __eqtf2
 * __lttf2
 * __netf2
 * __gttf2
2017-08-17 19:10:15 -04:00
Andrew Kelley 0d117bb0a9 fix wrong value for clz, ctz at compile time
closes #418

also make clz, ctz return smaller integer bit widths
and use smaller integer bit widths for enum tag types
2017-08-17 17:14:35 -04:00
Andrew Kelley 6a98bf3dba compiler_rt implementations for __fixuns* functions
* add u128 and i128 integer types
 * add f128 floating point type
 * implement big integer multiplication (See #405)
2017-08-16 19:07:35 -04:00
Andrew Kelley 35d3444e27 more intuitive left shift and right shift operators
Before:
 * << is left shift, not allowed to shift 1 bits out
 * <<% is left shift, allowed to shift 1 bits out
 * >> is right shift, allowed to shift 1 bits out

After:
 * << is left shift, allowed to shift 1 bits out
 * >> is right shift, allowed to shift 1 bits out
 * @shlExact is left shift, not allowed to shift 1 bits out
 * @shrExact is right shift, not allowed to shift 1 bits out

Closes #413
2017-08-09 10:09:38 -04:00
Andrew Kelley 54675b060a add ptrToInt builtin, remove usize(ptr) cast
closes #415
2017-08-08 17:38:25 -04:00
Andrew Kelley 2234788fa8 add ability to explicitly cast float to integer
closes #414
2017-08-07 15:57:41 -04:00
Marc Tiehuis 0705b711f8 Correct floating-point literal allowed ranges
The exponent range for floating-point values is [-1022, 1023].

Fixes #399.
2017-08-07 18:08:09 +12:00
Andrew Kelley d1e68c3ca8 better bigint/bigfloat implementation 2017-07-08 17:59:10 -04:00
scurest 1a63f27247 allow trailing commas
closes #392
2017-06-17 10:34:51 -04:00
Andrew Kelley 1566ca21c4 fix peer type resolution for array and error
closes #388
2017-06-17 10:29:04 -04:00
Andrew Kelley 865b53f286 fix alignOf builtin
* fix assertion error when type is not yet complete
 * fix alignment value

closes #391
2017-06-15 23:47:05 -04:00
Andrew Kelley ae61e26680 fix compiler segfault on `null ?? x`
closes #390
2017-06-14 19:32:52 -04:00
Andrew Kelley 7f0620a20f partial implementation of printing floating point numbers with errol3
also add bitCast builtin function. closes #387
2017-06-14 00:24:25 -04:00
Andrew Kelley 1ae2002b41 fix crash when writing to const hardcoded ptr
closes #381
2017-05-29 14:25:00 -04:00
Andrew Kelley 8ae4ffa493 fix crash when unwrapping optional field of global variable
closes #379
2017-05-29 14:08:39 -04:00
Andrew Kelley 2dfb1ebee2 const global values can reference each other
Before, if you did something like:

```
const hi1 = "hi";
const hi2 = hi1;
```

This would create the "hi" data twice in the built object.
But since the value is const we don't have to duplicate the
data, now we take advantage of this fact.

closes #336
2017-05-27 00:54:14 -04:00
Andrew Kelley d6b01931ef implicitly cast by value var args parameters to const references
See #336
2017-05-26 16:44:13 -04:00
Andrew Kelley c42c91ee7c fix segfault with array of generic functions
closes #377
2017-05-26 14:39:18 -04:00
Andrew Kelley 68add5d828 clean up behavior test names 2017-05-23 21:38:31 -04:00
Andrew Kelley 9f3cca8615 add error for break/continue exiting defer expression
See #284
2017-05-21 10:44:55 -04:00
Andrew Kelley 29b488245d add setFloatMode builtin and std.math.floor
* skip installing std/rand_test.zig as it's not needed beyond running
   the std lib tests
 * add std.math.floor function
 * add setFloatMode builtin function to choose between
   builtin.FloatMode.Optimized (default) and builtin.FloatMode.Strict
   (Optimized is equivalent to -ffast-math in gcc)
2017-05-20 23:06:32 -04:00
Andrew Kelley 051ee8e626 change slicing syntax from ... to ..
See #359
2017-05-19 10:39:59 -04:00
Andrew Kelley b483db4868 typeId builtin instead of isInteger, isFloat, etc
closes #373
2017-05-17 12:26:35 -04:00
Andrew Kelley 9851a943ed add compile error for compile-time integer cast truncating bits
closes #371
2017-05-16 17:04:35 -04:00
Andrew Kelley 6237411716 inline function call with builtin function instead...
...of special syntax.

partially reverts 41144a8566

closes #306
2017-05-09 22:54:23 -04:00
Andrew Kelley 01f066de37 ability to slice ptr to hard coded integer at comptime
closes #369
2017-05-09 22:23:38 -04:00
Andrew Kelley 2f20fe6ecd delete @generatedCode builtin function
good riddance
2017-05-07 23:25:36 -04:00
Andrew Kelley e485af94d4 fix inability to initialize global pointer to global array element
closes #366
2017-05-07 18:09:45 -04:00
Andrew Kelley dc2df15528 add test case for all prongs unreachable in switch
See #43
2017-05-07 13:26:41 -04:00
Andrew Kelley 11d8a8cc7b fix comptime switch on enum with ref payload
See #43
2017-05-07 13:21:53 -04:00
Andrew Kelley 818a0a2629 switch expression - add compile errors
* for duplicate integer value
   * for missing integer values
   * for missing else prong

see #43
2017-05-07 12:07:35 -04:00
Andrew Kelley 29beb603b7 allow division and remainder operators sometimes
when the values are comptime known and the result would be the same,
allow `/` and `%` for signed integers and floats.

closes #365
2017-05-06 23:59:57 -04:00
Andrew Kelley 157af4332a builtin functions for division and remainder division
* add `@divTrunc` and `@divFloor` functions
 * add `@rem` and `@mod` functions
 * add compile error for `/` and `%` with signed integers
 * add `.bit_count` for float primitive types

closes #217
2017-05-06 23:13:12 -04:00
Andrew Kelley b6a679c0ed implement else on loops and break can give an expression
closes #357
2017-05-04 12:43:11 -04:00
Andrew Kelley 20b1491e6b implement while for nullables and error unions
See #357
2017-05-04 10:28:00 -04:00
Andrew Kelley 698829b772 change while syntax
Old:

```
while (condition; expression) {}
```

New:

```
while (condition) : (expression) {}
```

This is in preparation to allow nullable and
error union types as the condition. See #357
2017-05-03 18:12:07 -04:00
Andrew Kelley 644ea2dde9 remove test and try expressions in favor of if expressions
See #357
2017-05-03 17:23:11 -04:00
Andrew Kelley 7c236f6dd8 fix compiler crash when referencing a variable...
...in an if after an if in the 2nd switch prong

closes #355
2017-05-02 12:59:09 -04:00
Andrew Kelley 9f92042da9 allow undefined to be resolved with other types
closes #295
2017-05-01 22:37:34 -04:00
Andrew Kelley 17b935325e `@import("builtin")` instead of `@compileVar`
See #226
Closes #220
2017-05-01 13:12:38 -04:00
Andrew Kelley 43e7ac8418 add peer type resolution `[]T` and `[0]T`
closes #349

also fix slicing const array to be []const T instead of []T
2017-04-30 12:21:24 -04:00
Andrew Kelley cbfe4b4bae add implicit cast from [0]T to %[]T
closes #347

also add std.os.path.relative
2017-04-29 19:23:33 -04:00
Andrew Kelley 7b0542d08b build system: consolidate duplicate code and more
* add ability to add assembly files when building an exe, obj, or lib
 * add implicit cast from `[N]T` to `?[]const T` (closes #343)
 * remove link_exe and link_lib in favor of allowing build_exe and
   build_lib support no root zig source file
2017-04-26 19:17:05 -04:00
Josh Wolfe c6605cba83 blocks check that their statements are void
closes #291

This changes the error message "return value ignored" to "expression value is ignored".
This is because this error also applies to {1;}, which has no function calls.

Also fix ignored expression values in std and test.
This caught a bug in debug.readAllocBytes where an early Eof error would have been missed.
See #219.
2017-04-23 21:15:15 -07:00
Andrew Kelley aafb0b9082 slicing now returns correct const-ness
also remove the ability to override constness when slicing

closes #334
2017-04-22 12:19:20 -04:00
Andrew Kelley 1a0081b763 add peer type resolution for T and ?T
See #334
2017-04-22 11:45:04 -04:00
Andrew Kelley 0cce115476 update syntax for try and nullable unwrapping
closes #285
2017-04-21 16:46:33 -04:00
Andrew Kelley d5346d7a80 remove `?return` and `?defer`
closes #309
2017-04-21 15:08:03 -04:00
Andrew Kelley e3c524c1d4 rename `@ptrcast` to `@ptrCast` to follow convention 2017-04-21 10:39:13 -04:00
Raul Leal 5234016561 Add @offsetOf builtin function 2017-04-20 11:53:00 +00:00
Andrew Kelley a791417552 add `@fieldParentPtr` builtin function
closes #320
2017-04-18 02:28:05 -04:00
Andrew Kelley 407916cd2f rename `@intType` to `@IntType` to follow convention
closes #327
2017-04-18 00:05:09 -04:00
Raul Leal 3266585606 Implicit cast from T to %?T
closes #171
2017-04-17 19:55:56 -04:00
Andrew Kelley bf57d8a7e3 typedefpocalypse
closes #314
2017-04-13 03:07:58 -04:00
Andrew Kelley 41144a8566 ability to inline at function callsite
closes #306
2017-04-13 00:13:54 -04:00
Andrew Kelley 34eff50326 fix for loops not working at compile-time
closes #315
2017-04-10 03:00:19 -04:00
Andrew Kelley 095591f0b0 add enumTagName builtin function
closes #299
2017-04-08 17:45:22 -04:00
Andrew Kelley 7611ed3484 allow implicit cast from `[N]T` to `&const []const T`
closes #296
2017-04-07 17:56:01 -04:00
Andrew Kelley f7e9d7aa5d ability to implicitly cast integer literal to &const Int
where Int is an integer type

also introduce `@intToPtr` builtin for converting a usize
to a pointer. users now have to use this instead of `(&T)(int)`.

closes #311
2017-04-07 15:35:38 -04:00
Andrew Kelley ffb4852012 add compile error for the bug of unable to call var ags at compile time
See #313
2017-04-07 00:33:19 -04:00
Andrew Kelley a3de550d3b fix var args having wrong index when runtime param before it
closes #312
2017-04-06 21:00:49 -04:00
Andrew Kelley 273cebdf4d peer resolve types [N]T, [M]T as []const T
closes #125
2017-04-06 18:07:38 -04:00
Andrew Kelley 47f58d6d02 fix runtime struct initialization of bitfield
closes #308
2017-04-06 15:04:18 -04:00
Andrew Kelley 6fbe1632d0 Update zig build system to support user defined options
* Fix assertion failure when switching on type.
   Closes #310
 * Update zig build system to support user defined options.
   See #204
 * fmt.format supports {sNNN} to set padding for a buffer arg.
 * add std.fmt.bufPrint and std.fmt.allocPrint
 * std.hash_map.HashMap.put returns the previous value
 * add std.mem.startsWith
2017-04-06 05:34:04 -04:00
Andrew Kelley 0edc2b19fe support module level assembly
closes #256
2017-04-04 19:47:22 -04:00
Andrew Kelley c9ae30d27e delete alloca builtin function
See #225

introduce os.EnvMap
2017-04-03 18:11:57 -04:00
Andrew Kelley 8fd0fddce5 zig build system progress
* In-progress os.ChildProcess.spawn implementation. See #204
 * Add explicit cast from integer to error. Closes #294
 * fix casting from error to integer
 * fix compiler crash when initializing variable to undefined
   with no type
2017-04-02 18:19:59 -04:00
Andrew Kelley f8e63c4584 change `@bitcast` to `@ptrcast`
See #290
2017-03-31 06:18:20 -04:00
Andrew Kelley 3ca027ca82 first pass at zig build system
* `zig build --export [obj|lib|exe]` changed to `zig build_obj`,
   `zig build_lib` and `zig build_exe` respectively.
 * `--name` parameter is optional when it can be inferred from the
   root source filename. closes #207
 * `zig build` now looks for `build.zig` which interacts with
   `std.build.Builder` to describe the targets, and then the zig
   build system prints TODO: build these targets. See #204
 * add `@bitcast` which is mainly used for pointer reinterpret
   casting and make explicit casting not do pointer reinterpretation.
   Closes #290
 * fix debug info for byval parameters
 * sort command line help options
 * `std.debug.panic` supports format string printing
 * add `std.mem.IncrementingAllocator`
 * fix const ptr to a variable with data changing at runtime.
   closes #289
2017-03-31 05:55:41 -04:00
Andrew Kelley a32b5929cc add stack protector safety when linking libc
* introduce zigrt file. it contains only weak symbols so that
   multiple instances can be merged. it contains __zig_panic
   so that multiple .o files can call the same panic function.
 * remove `@setFnVisible` builtin and add @setGlobalLinkage builtin
   which is more powerful
 * add `@panic` builtin function.
 * fix collision of symbols with extern prototypes and internal
   function names
 * add stack protector safety when linking against libc. To add
   the safety mechanism without libc requires implementing
   Thread Local Storage. See #276
2017-03-26 21:07:07 -04:00
Andrew Kelley 3103355805 add comptime eval for some uint comparisons with 0
closes #55
2017-03-26 14:41:17 -04:00
Andrew Kelley 5bc9feb5cb organize std and make import relative to current file
closes #216
2017-03-26 06:39:28 -04:00
Andrew Kelley 7ce753a16b replace "&&" and "||" with "and" and "or"
closes #272
2017-03-26 05:21:28 -04:00
Andrew Kelley 451ce09067 new unreachable syntax
* `noreturn` is the primitive type.
 * `unreachable` is a control flow keyword.
 * `@unreachable()` builtin function is deleted.

closes #214
2017-03-26 04:58:48 -04:00
Andrew Kelley 7c53230a61 introduce copyable concept
closes #103
2017-03-26 03:39:18 -04:00
Andrew Kelley af536ac343 introduce new test syntax
* remove setFnTest builtin
 * add test "name" { ... } syntax
 * remove --check-unused argument. functions are always lazy now.
2017-03-16 16:02:35 -04:00
Andrew Kelley a76558db26 fix behavior with reinterpreting constant memory 2017-03-14 21:38:27 -04:00
Andrew Kelley 434f017aee codegen nullable void the same way as bool
See #104
2017-03-10 11:21:41 -05:00
Andrew Kelley 47f267d25f break off some of std.io into std.fmt, generalize printf
closes #250
2017-03-09 19:12:15 -05:00
Andrew Kelley c62db5721c support passing var args directly
See #77
2017-03-09 16:13:38 -05:00
Andrew Kelley 558ae2f21a fix a case of invalid ptr const-ness 2017-03-08 17:02:18 -05:00
Andrew Kelley 9eb29e81f9 rename CBuf to Buffer0 and some minor std API changes 2017-02-28 03:07:11 -05:00
Andrew Kelley 1195994880 fix inability to write to global in some cases
before, when we initialized a variable by copying the
initialization value, it made the internal const value
references point to a duplicate value, resulting in
a phony duplicate global value being updated instead of
the real on. now the behavior is as expected.

thanks to hoppetosse for pointing out this bug on IRC.
2017-02-27 00:07:11 -05:00
Andrew Kelley 25761570f1 more robust const struct values 2017-02-26 23:50:04 -05:00
Andrew Kelley 8dd0b4e1f1 add passing test for floating point edge case 2017-02-26 16:30:15 -05:00
Andrew Kelley a665872e88 add compile error for ignoring return value
also introduce the _ identifier which you can assign to
to discard a return value

closes #219
2017-02-24 15:01:19 -05:00
Andrew Kelley 786677f80c fix regression with bit fields that align properly 2017-02-22 00:58:31 -05:00
Andrew Kelley d794549985 bitfields support for array of non-store-aligned packed structs 2017-02-22 00:49:10 -05:00
Andrew Kelley cf5108f222 correct size of types for packed structs
with byte aligned but non-power-of-2 fields such as 24
2017-02-21 14:22:23 -05:00