Translate C: Group generated casts
Translate C: Put an alignCast in c style pointer casts to allow opaque types to cast properly in C macros Translate C: add test case for aligning opaque types in pointer casts Translate C: Fix @typeId -> @typeInfo Add test case to run_translated_c for casting from pointer to opaque type
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@ -5424,12 +5424,15 @@ fn parseCPrimaryExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
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return error.ParseError;
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}
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//if (@typeInfo(@TypeOf(x)) == .Pointer)
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// @ptrCast(dest, x)
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// TODO: It might be nice if we only did the alignCasting for opaque types
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//( if (@typeInfo(@TypeOf(x)) == .Pointer)
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// @ptrCast(dest, @alignCast(@alignOf(dest.Child), x))
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//else if (@typeInfo(@TypeOf(x)) == .Integer)
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// @intToPtr(dest, x)
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//else
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// @as(dest, x)
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// @as(dest, x) )
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const group_lparen = try appendToken(c, .LParen, "(");
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const if_1 = try transCreateNodeIf(c);
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const type_id_1 = try transCreateNodeBuiltinFnCall(c, "@typeInfo");
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@ -5449,9 +5452,30 @@ fn parseCPrimaryExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
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if_1.condition = &cmp_1.base;
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_ = try appendToken(c, .RParen, ")");
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const period_tok = try appendToken(c, .Period, ".");
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const child_ident = try transCreateNodeIdentifier(c, "Child");
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const inner_node_child = try c.a().create(ast.Node.InfixOp);
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inner_node_child.* = .{
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.op_token = period_tok,
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.lhs = inner_node,
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.op = .Period,
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.rhs = child_ident,
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};
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const align_of = try transCreateNodeBuiltinFnCall(c, "@alignOf");
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try align_of.params.push(&inner_node_child.base);
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align_of.rparen_token = try appendToken(c, .RParen, ")");
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// hack to get zig fmt to render a comma in builtin calls
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_ = try appendToken(c, .Comma, ",");
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const align_cast = try transCreateNodeBuiltinFnCall(c, "@alignCast");
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try align_cast.params.push(&align_of.base);
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try align_cast.params.push(node_to_cast);
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align_cast.rparen_token = try appendToken(c, .RParen, ")");
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const ptr_cast = try transCreateNodeBuiltinFnCall(c, "@ptrCast");
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try ptr_cast.params.push(inner_node);
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try ptr_cast.params.push(node_to_cast);
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try ptr_cast.params.push(&align_cast.base);
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ptr_cast.rparen_token = try appendToken(c, .RParen, ")");
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if_1.body = &ptr_cast.base;
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@ -5492,7 +5516,14 @@ fn parseCPrimaryExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
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as.rparen_token = try appendToken(c, .RParen, ")");
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else_2.body = &as.base;
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return &if_1.base;
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const group_rparen = try appendToken(c, .RParen, ")");
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const grouped_expr = try c.a().create(ast.Node.GroupedExpression);
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grouped_expr.* = .{
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.lparen = group_lparen,
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.expr = &if_1.base,
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.rparen = group_rparen,
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};
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return &grouped_expr.base;
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},
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else => {
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const first_tok = it.list.at(0);
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@ -195,4 +195,22 @@ pub fn addCases(cases: *tests.RunTranslatedCContext) void {
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\\ return 0;
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\\}
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, "");
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cases.add("cast from pointer to opaque type to struct",
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\\#include <stdio.h>
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\\typedef struct
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\\{
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\\ int i;
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\\}
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\\StructType,*StructPtrType;
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\\
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\\typedef struct OpaqueStruct OpaqueStructTypedef;
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\\#define Macro(opaquePtr) (((StructPtrType)(opaquePtr))->i)
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\\int main(int argc, char **argv) {
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\\ StructType localStruct = {88};
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\\ OpaqueStructTypedef *opaquePtrToLocal = &localStruct;
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\\ printf("%d!\n", Macro(opaquePtrToLocal));
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\\ return 0;
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\\}
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, "88!\n");
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}
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@ -1404,7 +1404,7 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
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cases.add("macro pointer cast",
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\\#define NRF_GPIO ((NRF_GPIO_Type *) NRF_GPIO_BASE)
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, &[_][]const u8{
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\\pub const NRF_GPIO = if (@typeInfo(@TypeOf(NRF_GPIO_BASE)) == .Pointer) @ptrCast([*c]NRF_GPIO_Type, NRF_GPIO_BASE) else if (@typeInfo(@TypeOf(NRF_GPIO_BASE)) == .Int) @intToPtr([*c]NRF_GPIO_Type, NRF_GPIO_BASE) else @as([*c]NRF_GPIO_Type, NRF_GPIO_BASE);
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\\pub const NRF_GPIO = (if (@typeInfo(@TypeOf(NRF_GPIO_BASE)) == .Pointer) @ptrCast([*c]NRF_GPIO_Type, @alignCast(@alignOf([*c]NRF_GPIO_Type.Child), NRF_GPIO_BASE)) else if (@typeInfo(@TypeOf(NRF_GPIO_BASE)) == .Int) @intToPtr([*c]NRF_GPIO_Type, NRF_GPIO_BASE) else @as([*c]NRF_GPIO_Type, NRF_GPIO_BASE));
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});
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cases.add("basic macro function",
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@ -2588,11 +2588,11 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
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\\#define FOO(bar) baz((void *)(baz))
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\\#define BAR (void*) a
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, &[_][]const u8{
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\\pub inline fn FOO(bar: var) @TypeOf(baz(if (@typeInfo(@TypeOf(baz)) == .Pointer) @ptrCast(*c_void, baz) else if (@typeInfo(@TypeOf(baz)) == .Int) @intToPtr(*c_void, baz) else @as(*c_void, baz))) {
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\\ return baz(if (@typeInfo(@TypeOf(baz)) == .Pointer) @ptrCast(*c_void, baz) else if (@typeInfo(@TypeOf(baz)) == .Int) @intToPtr(*c_void, baz) else @as(*c_void, baz));
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\\pub inline fn FOO(bar: var) @TypeOf(baz((if (@typeInfo(@TypeOf(baz)) == .Pointer) @ptrCast(*c_void, @alignCast(@alignOf(*c_void.Child), baz)) else if (@typeInfo(@TypeOf(baz)) == .Int) @intToPtr(*c_void, baz) else @as(*c_void, baz)))) {
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\\ return baz((if (@typeInfo(@TypeOf(baz)) == .Pointer) @ptrCast(*c_void, @alignCast(@alignOf(*c_void.Child), baz)) else if (@typeInfo(@TypeOf(baz)) == .Int) @intToPtr(*c_void, baz) else @as(*c_void, baz)));
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\\}
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,
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\\pub const BAR = if (@typeInfo(@TypeOf(a)) == .Pointer) @ptrCast(*c_void, a) else if (@typeInfo(@TypeOf(a)) == .Int) @intToPtr(*c_void, a) else @as(*c_void, a);
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\\pub const BAR = (if (@typeInfo(@TypeOf(a)) == .Pointer) @ptrCast(*c_void, @alignCast(@alignOf(*c_void.Child), a)) else if (@typeInfo(@TypeOf(a)) == .Int) @intToPtr(*c_void, a) else @as(*c_void, a));
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});
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cases.add("macro conditional operator",
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@ -2754,4 +2754,20 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
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\\ return if (x > y) x else y;
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\\}
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});
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cases.add("Make sure casts are grouped",
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\\typedef struct
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\\{
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\\ int i;
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\\}
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\\*_XPrivDisplay;
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\\typedef struct _XDisplay Display;
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\\#define DefaultScreen(dpy) (((_XPrivDisplay)(dpy))->default_screen)
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\\
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, &[_][]const u8{
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\\pub inline fn DefaultScreen(dpy: var) @TypeOf((if (@typeInfo(@TypeOf(dpy)) == .Pointer) @ptrCast(_XPrivDisplay, @alignCast(@alignOf(_XPrivDisplay.Child), dpy)) else if (@typeInfo(@TypeOf(dpy)) == .Int) @intToPtr(_XPrivDisplay, dpy) else @as(_XPrivDisplay, dpy)).*.default_screen) {
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\\ return (if (@typeInfo(@TypeOf(dpy)) == .Pointer) @ptrCast(_XPrivDisplay, @alignCast(@alignOf(_XPrivDisplay.Child), dpy)) else if (@typeInfo(@TypeOf(dpy)) == .Int) @intToPtr(_XPrivDisplay, dpy) else @as(_XPrivDisplay, dpy)).*.default_screen;
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\\}
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});
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}
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