Fix a whole bunch of issues exposed by ziglang/zig#9191

This also includes a workaround for the fact that @"type" refers to the builtin
and not to a variable called "type". See ziglang/zig#2897.

build.zig

@@ -34,7 +34,7 @@ pub const ResourceGenStep = struct {
         return self;
     }
 
-    fn renderPath(self: *ResourceGenStep, path: []const u8, writer: anytype) void {
+    fn renderPath(path: []const u8, writer: anytype) void {
         const separators = &[_]u8{ std.fs.path.sep_windows, std.fs.path.sep_posix };
         var i: usize = 0;
         while (std.mem.indexOfAnyPos(u8, path, i, separators)) |j| {
@@ -55,7 +55,7 @@ pub const ResourceGenStep = struct {
         var writer = self.resources.writer();
 
         writer.print("pub const {s} = @embedFile(\"", .{name}) catch unreachable;
-        self.renderPath(shader_out_path, writer);
+        renderPath(shader_out_path, writer);
         writer.writeAll("\");\n") catch unreachable;
     }
 

examples/graphics_context.zig

@@ -123,7 +123,7 @@ pub const GraphicsContext = struct {
         self.vki = try InstanceDispatch.load(self.instance, c.glfwGetInstanceProcAddress);
         errdefer self.vki.destroyInstance(self.instance, null);
 
-        self.surface = try createSurface(self.vki, self.instance, window);
+        self.surface = try createSurface(self.instance, window);
         errdefer self.vki.destroySurfaceKHR(self.instance, self.surface, null);
 
         const candidate = try pickPhysicalDevice(self.vki, self.instance, allocator, self.surface);
@@ -182,7 +182,7 @@ pub const Queue = struct {
     }
 };
 
-fn createSurface(vki: InstanceDispatch, instance: vk.Instance, window: *c.GLFWwindow) !vk.SurfaceKHR {
+fn createSurface(instance: vk.Instance, window: *c.GLFWwindow) !vk.SurfaceKHR {
     var surface: vk.SurfaceKHR = undefined;
     if (c.glfwCreateWindowSurface(instance, window, null, &surface) != .success) {
         return error.SurfaceInitFailed;

examples/triangle.zig

@@ -78,7 +78,7 @@ pub fn main() !void {
     const render_pass = try createRenderPass(&gc, swapchain);
     defer gc.vkd.destroyRenderPass(gc.dev, render_pass, null);
 
-    var pipeline = try createPipeline(&gc, extent, pipeline_layout, render_pass);
+    var pipeline = try createPipeline(&gc, pipeline_layout, render_pass);
     defer gc.vkd.destroyPipeline(gc.dev, pipeline, null);
 
     var framebuffers = try createFramebuffers(&gc, allocator, render_pass, swapchain);
@@ -104,7 +104,7 @@ pub fn main() !void {
     defer gc.vkd.freeMemory(gc.dev, memory, null);
     try gc.vkd.bindBufferMemory(gc.dev, buffer, memory, 0);
 
-    try uploadVertices(&gc, pool, buffer, memory);
+    try uploadVertices(&gc, pool, buffer);
 
     var cmdbufs = try createCommandBuffers(
         &gc,
@@ -157,7 +157,7 @@ pub fn main() !void {
     try swapchain.waitForAllFences();
 }
 
-fn uploadVertices(gc: *const GraphicsContext, pool: vk.CommandPool, buffer: vk.Buffer, memory: vk.DeviceMemory) !void {
+fn uploadVertices(gc: *const GraphicsContext, pool: vk.CommandPool, buffer: vk.Buffer) !void {
     const staging_buffer = try gc.vkd.createBuffer(gc.dev, .{
         .flags = .{},
         .size = @sizeOf(@TypeOf(vertices)),
@@ -368,7 +368,6 @@ fn createRenderPass(gc: *const GraphicsContext, swapchain: Swapchain) !vk.Render
 
 fn createPipeline(
     gc: *const GraphicsContext,
-    extent: vk.Extent2D,
     layout: vk.PipelineLayout,
     render_pass: vk.RenderPass,
 ) !vk.Pipeline {

generator/id_render.zig

@@ -2,6 +2,41 @@ const std = @import("std");
 const mem = std.mem;
 const Allocator = mem.Allocator;
 
+pub fn isZigPrimitiveType(name: []const u8) bool {
+    if (name.len > 1 and (name[0] == 'u' or name[0] == 'i')) {
+        for (name[1..]) |c| {
+            switch (c) {
+                '0'...'9' => {},
+                else => return false,
+            }
+        }
+        return true;
+    }
+
+    const primitives = [_][]const u8{ "void", "comptime_float", "comptime_int", "bool", "isize", "usize", "f16", "f32", "f64", "f128", "c_longdouble", "noreturn", "type", "anyerror", "c_short", "c_ushort", "c_int", "c_uint", "c_long", "c_ulong", "c_longlong", "c_ulonglong" };
+
+    for (primitives) |reserved| {
+        if (mem.eql(u8, reserved, name)) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+fn needZigEscape(name: []const u8) bool {
+    return !std.zig.fmt.isValidId(name) or isZigPrimitiveType(name);
+}
+
+pub fn writeIdentifier(out: anytype, id: []const u8) !void {
+    // https://github.com/ziglang/zig/issues/2897
+    if (isZigPrimitiveType(id)) {
+        try out.print("{s}_", .{id});
+    } else {
+        try out.print("{}", .{std.zig.fmtId(id)});
+    }
+}
+
 pub const CaseStyle = enum {
     snake,
     screaming_snake,
@@ -138,14 +173,10 @@ pub const IdRenderer = struct {
         }
     }
 
-    pub fn render(self: IdRenderer, out: anytype, id: []const u8) !void {
-        try out.print("{}", .{std.zig.fmtId(id)});
-    }
-
     pub fn renderFmt(self: *IdRenderer, out: anytype, comptime fmt: []const u8, args: anytype) !void {
         self.text_cache.items.len = 0;
         try std.fmt.format(self.text_cache.writer(), fmt, args);
-        try out.print("{}", .{std.zig.fmtId(self.text_cache.items)});
+        try writeIdentifier(out, self.text_cache.items);
     }
 
     pub fn renderWithCase(self: *IdRenderer, out: anytype, case_style: CaseStyle, id: []const u8) !void {
@@ -162,7 +193,7 @@ pub const IdRenderer = struct {
             .camel => try self.renderCamel(false, adjusted_id, tag),
         }
 
-        try out.print("{}", .{std.zig.fmtId(self.text_cache.items)});
+        try writeIdentifier(out, self.text_cache.items);
     }
 
     pub fn getAuthorTag(self: IdRenderer, id: []const u8) ?[]const u8 {

generator/index.zig

@@ -1,6 +1,5 @@
 pub const generateVk = @import("vulkan/generator.zig").generate;
 pub const VkGenerateStep = @import("vulkan/build_integration.zig").GenerateStep;
-pub const generateSpirv = @import("spirv/generator.zig").generate;
 pub const ShaderCompileStep = @import("build_integration.zig").ShaderCompileStep;
 
 test "main" {

generator/main.zig

@@ -5,7 +5,6 @@ const usage = "Usage: {s} [-h|--help] <spec xml path> <output zig source>\n";
 
 pub fn main() !void {
     const stderr = std.io.getStdErr();
-    const stdout = std.io.getStdOut();
 
     var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
     defer arena.deinit();

generator/vulkan/c_parse.zig

@@ -514,7 +514,7 @@ pub fn parseVersion(xctok: *XmlCTokenizer) ![4][]const u8 {
         return error.InvalidVersion;
     }
 
-    const name = try xctok.expect(.name);
+    _ = try xctok.expect(.name);
     const vk_make_version = try xctok.expect(.type_name);
     if (!mem.eql(u8, vk_make_version.text, "VK_MAKE_API_VERSION")) {
         return error.NotVersion;

generator/vulkan/generator.zig

@@ -171,7 +171,7 @@ pub const Generator = struct {
                     if (e.is_bitmask and seen_bits.get(decl.name) == null)
                         continue;
                 },
-                else => {}
+                else => {},
             }
             self.registry.decls[i] = decl;
             i += 1;

generator/vulkan/parse.zig

@@ -74,7 +74,7 @@ fn parseTypes(allocator: *Allocator, out: []registry.Declaration, types_elem: *x
             } else if (mem.eql(u8, category, "funcpointer")) {
                 break :blk try parseFuncPointer(allocator, ty);
             } else if (mem.eql(u8, category, "enum")) {
-                break :blk (try parseEnumAlias(allocator, ty)) orelse continue;
+                break :blk (try parseEnumAlias(ty)) orelse continue;
             }
 
             continue;
@@ -297,7 +297,7 @@ fn parsePointerMeta(fields: Fields, type_info: *registry.TypeInfo, elem: *xml.El
     }
 }
 
-fn parseEnumAlias(allocator: *Allocator, elem: *xml.Element) !?registry.Declaration {
+fn parseEnumAlias(elem: *xml.Element) !?registry.Declaration {
     if (elem.getAttribute("alias")) |alias| {
         const name = elem.getAttribute("name") orelse return error.InvalidRegistry;
         return registry.Declaration{

generator/vulkan/render.zig

@@ -40,7 +40,7 @@ const preamble =
     \\            return fromInt(toInt(lhs) & toInt(rhs));
     \\        }
     \\        pub fn complement(self: FlagsType) FlagsType {
-    \\            return fromInt(~toInt(lhs));
+    \\            return fromInt(~toInt(self));
     \\        }
     \\        pub fn subtract(lhs: FlagsType, rhs: FlagsType) FlagsType {
     \\            return fromInt(toInt(lhs) & toInt(rhs.complement()));
@@ -214,7 +214,7 @@ fn Renderer(comptime WriterType: type) type {
         }
 
         fn writeIdentifier(self: Self, id: []const u8) !void {
-            try self.id_renderer.render(self.writer, id);
+            try id_render.writeIdentifier(self.writer, id);
         }
 
         fn writeIdentifierWithCase(self: *Self, case: CaseStyle, id: []const u8) !void {
@@ -242,7 +242,7 @@ fn Renderer(comptime WriterType: type) type {
             }
         }
 
-        fn extractBitflagFieldName(self: Self, bitflag_name: BitflagName, field_name: []const u8) ![]const u8 {
+        fn extractBitflagFieldName(bitflag_name: BitflagName, field_name: []const u8) ![]const u8 {
             var flag_it = id_render.SegmentIterator.init(bitflag_name.base_name);
             var field_it = id_render.SegmentIterator.init(field_name);
 
@@ -295,16 +295,6 @@ fn Renderer(comptime WriterType: type) type {
             return mem.endsWith(u8, base_name, "Flags");
         }
 
-        fn containerHasField(self: Self, container: *const reg.Container, field_name: []const u8) bool {
-            for (container.fields) |field| {
-                if (mem.eql(u8, field, field_name)) {
-                    return true;
-                }
-            }
-
-            return false;
-        }
-
         fn isInOutPointer(self: Self, ptr: reg.Pointer) !bool {
             if (ptr.child.* != .name) {
                 return false;
@@ -373,7 +363,7 @@ fn Renderer(comptime WriterType: type) type {
                     }
                 },
                 .name => |name| {
-                    if ((try self.extractBitflagName(param.param_type.name)) != null or self.isFlags(param.param_type.name)) {
+                    if ((try self.extractBitflagName(name)) != null or self.isFlags(name)) {
                         return .bitflags;
                     }
                 },
@@ -387,7 +377,7 @@ fn Renderer(comptime WriterType: type) type {
             return .other;
         }
 
-        fn classifyCommandDispatch(self: Self, name: []const u8, command: reg.Command) CommandDispatchType {
+        fn classifyCommandDispatch(name: []const u8, command: reg.Command) CommandDispatchType {
             const device_handles = std.ComptimeStringMap(void, .{
                 .{ "VkDevice", {} },
                 .{ "VkCommandBuffer", {} },
@@ -710,37 +700,6 @@ fn Renderer(comptime WriterType: type) type {
             try self.writeIdentifierWithCase(.snake, try self.extractEnumFieldName(name, field_name));
         }
 
-        fn renderEnumerationValue(self: *Self, enum_name: []const u8, enumeration: reg.Enum, value: reg.Enum.Value) !void {
-            var current_value = value;
-            var maybe_alias_of: ?[]const u8 = null;
-
-            while (true) {
-                switch (current_value) {
-                    .int => |int| try self.writer.print(" = {}, ", .{int}),
-                    .bitpos => |pos| try self.writer.print(" = 1 << {}, ", .{pos}),
-                    .bit_vector => |bv| try self.writer.print("= 0x{X}, ", .{bv}),
-                    .alias => |alias| {
-                        // Find the alias
-                        current_value = for (enumeration.fields) |field| {
-                            if (mem.eql(u8, field.name, alias.name)) {
-                                maybe_alias_of = field.name;
-                                break field.value;
-                            }
-                        } else return error.InvalidRegistry; // There is no alias
-                        continue;
-                    },
-                }
-
-                break;
-            }
-
-            if (maybe_alias_of) |alias_of| {
-                try self.writer.writeAll("// alias of ");
-                try self.renderEnumFieldName(enum_name, alias_of);
-                try self.writer.writeByte('\n');
-            }
-        }
-
         fn renderEnumeration(self: *Self, name: []const u8, enumeration: reg.Enum) !void {
             if (enumeration.is_bitmask) {
                 try self.renderBitmaskBits(name, enumeration);
@@ -749,17 +708,37 @@ fn Renderer(comptime WriterType: type) type {
 
             try self.writer.writeAll("pub const ");
             try self.renderName(name);
-            try self.writer.writeAll(" = extern enum(i32) {");
+            try self.writer.writeAll(" = enum(c_int) {");
+
+            for (enumeration.fields) |field| {
+                if (field.value == .alias)
+                    continue;
+
+                try self.renderEnumFieldName(name, field.name);
+                switch (field.value) {
+                    .int => |int| try self.writer.print(" = {}, ", .{int}),
+                    .bitpos => |pos| try self.writer.print(" = 1 << {}, ", .{pos}),
+                    .bit_vector => |bv| try self.writer.print("= 0x{X}, ", .{bv}),
+                    .alias => unreachable,
+                }
+            }
+
+            try self.writer.writeAll("_,");
 
             for (enumeration.fields) |field| {
-                if (field.value == .alias and field.value.alias.is_compat_alias)
+                if (field.value != .alias or field.value.alias.is_compat_alias)
                     continue;
 
+                try self.writer.writeAll("pub const ");
                 try self.renderEnumFieldName(name, field.name);
-                try self.renderEnumerationValue(name, enumeration, field.value);
+                try self.writer.writeAll(" = ");
+                try self.renderName(name);
+                try self.writer.writeByte('.');
+                try self.renderEnumFieldName(name, field.value.alias.name);
+                try self.writer.writeAll(";\n");
             }
 
-            try self.writer.writeAll("_,};\n");
+            try self.writer.writeAll("};\n");
         }
 
         fn bitmaskFlagsType(bitwidth: u8) ![]const u8 {
@@ -797,7 +776,7 @@ fn Renderer(comptime WriterType: type) type {
 
                 for (flags_by_bitpos[0..bits.bitwidth]) |maybe_flag_name, bitpos| {
                     if (maybe_flag_name) |flag_name| {
-                        const field_name = try self.extractBitflagFieldName(bitflag_name, flag_name);
+                        const field_name = try extractBitflagFieldName(bitflag_name, flag_name);
                         try self.writeIdentifierWithCase(.snake, field_name);
                     } else {
                         try self.writer.print("_reserved_bit_{}", .{bitpos});
@@ -843,7 +822,7 @@ fn Renderer(comptime WriterType: type) type {
 
             try self.writer.writeAll("pub const ");
             try self.renderName(name);
-            try self.writer.print(" = extern enum({s}) {{null_handle = 0, _}};\n", .{backing_type});
+            try self.writer.print(" = enum({s}) {{null_handle = 0, _}};\n", .{backing_type});
         }
 
         fn renderAlias(self: *Self, name: []const u8, alias: reg.Alias) !void {
@@ -948,7 +927,7 @@ fn Renderer(comptime WriterType: type) type {
             for (self.registry.decls) |decl| {
                 if (decl.decl_type == .command) {
                     const command = decl.decl_type.command;
-                    if (self.classifyCommandDispatch(decl.name, command) == dispatch_type) {
+                    if (classifyCommandDispatch(decl.name, command) == dispatch_type) {
                         try self.renderWrapper(decl.name, decl.decl_type.command);
                     }
                 }
@@ -1208,13 +1187,13 @@ fn Renderer(comptime WriterType: type) type {
             try self.writer.writeAll(") {\n");
 
             for (command.success_codes) |success| {
-                try self.writer.writeByte('.');
+                try self.writer.writeAll("Result.");
                 try self.renderEnumFieldName("VkResult", success);
                 try self.writer.writeAll(" => {},");
             }
 
             for (command.error_codes) |err| {
-                try self.writer.writeByte('.');
+                try self.writer.writeAll("Result.");
                 try self.renderEnumFieldName("VkResult", err);
                 try self.writer.writeAll(" => return error.");
                 try self.renderResultAsErrorName(err);