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translate-c: demote variadic functions to declarations

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This commit is contained in:
Veikka Tuominen
2020-12-26 13:01:58 +02:00
parent 641bf4c46e
commit 50e8c3882a
2 changed files with 16 additions and 1 deletions
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8
src/translate_c.zig
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@@ -550,7 +550,7 @@ fn visitFnDecl(c: *Context, fn_decl: *const clang.FunctionDecl) Error!void {
const fn_decl_loc = fn_decl.getLocation();
const has_body = fn_decl.hasBody();
const storage_class = fn_decl.getStorageClass();
const decl_ctx = FnDeclContext{
var decl_ctx = FnDeclContext{
.fn_name = fn_name,
.has_body = has_body,
.storage_class = storage_class,
@@ -584,6 +584,12 @@ fn visitFnDecl(c: *Context, fn_decl: *const clang.FunctionDecl) Error!void {
const proto_node = switch (fn_type.getTypeClass()) {
.FunctionProto => blk: {
const fn_proto_type = @ptrCast(*const clang.FunctionProtoType, fn_type);
if (has_body and fn_proto_type.isVariadic()) {
decl_ctx.has_body = false;
decl_ctx.storage_class = .Extern;
decl_ctx.is_export = false;
try emitWarning(c, fn_decl_loc, "TODO unable to translate variadic function, demoted to declaration", .{});
}
break :blk transFnProto(rp, fn_decl, fn_proto_type, fn_decl_loc, decl_ctx, true) catch |err| switch (err) {
error.UnsupportedType => {
return failDecl(c, fn_decl_loc, fn_name, "unable to resolve prototype of function", .{});

9
test/translate_c.zig
View File

@@ -3,6 +3,15 @@ const std = @import("std");
const CrossTarget = std.zig.CrossTarget;
pub fn addCases(cases: *tests.TranslateCContext) void {
cases.add("variadic function demoted to prototype",
\\int foo(int bar, ...) {
\\ return 1;
\\}
, &[_][]const u8{
\\warning: TODO unable to translate variadic function, demoted to declaration
\\pub extern fn foo(bar: c_int, ...) c_int;
});
cases.add("pointer to opaque demoted struct",
\\typedef struct {
\\ _Atomic int foo;