Merge branch 'master' into zig-master

1 files changed, 98 insertions, 126 deletions

diff --git a/clap/streaming.zig b/clap/streaming.zig
index 0fe5aae..a2a0ca8 100644
--- a/clap/streaming.zig
+++ b/clap/streaming.zig
@@ -40,12 +40,13 @@ pub fn StreamingClap(comptime Id: type, comptime ArgIterator: type) type {
         iter: *ArgIterator,
         state: State = .normal,
         positional: ?*const clap.Param(Id) = null,
+        diagnostic: ?*clap.Diagnostic = null,
 
         /// Get the next Arg that matches a Param.
-        pub fn next(parser: *@This(), diag: ?*clap.Diagnostic) !?Arg(Id) {
+        pub fn next(parser: *@This()) !?Arg(Id) {
             switch (parser.state) {
-                .normal => return try parser.normal(diag),
-                .chaining => |state| return try parser.chainging(state, diag),
+                .normal => return try parser.normal(),
+                .chaining => |state| return try parser.chainging(state),
                 .rest_are_positional => {
                     const param = parser.positionalParam() orelse unreachable;
                     const value = (try parser.iter.next()) orelse return null;
@@ -54,7 +55,7 @@ pub fn StreamingClap(comptime Id: type, comptime ArgIterator: type) type {
             }
         }
 
-        fn normal(parser: *@This(), diag: ?*clap.Diagnostic) !?Arg(Id) {
+        fn normal(parser: *@This()) !?Arg(Id) {
             const arg_info = (try parser.parseNextArg()) orelse return null;
             const arg = arg_info.arg;
             switch (arg_info.kind) {
@@ -68,9 +69,9 @@ pub fn StreamingClap(comptime Id: type, comptime ArgIterator: type) type {
 
                         if (!mem.eql(u8, name, match))
                             continue;
-                        if (param.takes_value == .None) {
+                        if (param.takes_value == .none) {
                             if (maybe_value != null)
-                                return err(diag, arg, .{ .long = name }, error.DoesntTakeValue);
+                                return parser.err(arg, .{ .long = name }, error.DoesntTakeValue);
 
                             return Arg(Id){ .param = param };
                         }
@@ -80,18 +81,18 @@ pub fn StreamingClap(comptime Id: type, comptime ArgIterator: type) type {
                                 break :blk v;
 
                             break :blk (try parser.iter.next()) orelse
-                                return err(diag, arg, .{ .long = name }, error.MissingValue);
+                                return parser.err(arg, .{ .long = name }, error.MissingValue);
                         };
 
                         return Arg(Id){ .param = param, .value = value };
                     }
 
-                    return err(diag, arg, .{ .long = name }, error.InvalidArgument);
+                    return parser.err(arg, .{ .long = name }, error.InvalidArgument);
                 },
                 .short => return try parser.chainging(.{
                     .arg = arg,
                     .index = 0,
-                }, diag),
+                }),
                 .positional => if (parser.positionalParam()) |param| {
                     // If we find a positional with the value `--` then we
                     // interpret the rest of the arguments as positional
@@ -104,12 +105,12 @@ pub fn StreamingClap(comptime Id: type, comptime ArgIterator: type) type {
 
                     return Arg(Id){ .param = param, .value = arg };
                 } else {
-                    return err(diag, arg, .{}, error.InvalidArgument);
+                    return parser.err(arg, .{}, error.InvalidArgument);
                 },
             }
         }
 
-        fn chainging(parser: *@This(), state: State.Chaining, diag: ?*clap.Diagnostic) !?Arg(Id) {
+        fn chainging(parser: *@This(), state: State.Chaining) !?Arg(Id) {
             const arg = state.arg;
             const index = state.index;
             const next_index = index + 1;
@@ -121,7 +122,7 @@ pub fn StreamingClap(comptime Id: type, comptime ArgIterator: type) type {
 
                 // Before we return, we have to set the new state of the clap
                 defer {
-                    if (arg.len <= next_index or param.takes_value != .None) {
+                    if (arg.len <= next_index or param.takes_value != .none) {
                         parser.state = .normal;
                     } else {
                         parser.state = .{
@@ -134,15 +135,15 @@ pub fn StreamingClap(comptime Id: type, comptime ArgIterator: type) type {
                 }
 
                 const next_is_eql = if (next_index < arg.len) arg[next_index] == '=' else false;
-                if (param.takes_value == .None) {
+                if (param.takes_value == .none) {
                     if (next_is_eql)
-                        return err(diag, arg, .{ .short = short }, error.DoesntTakeValue);
+                        return parser.err(arg, .{ .short = short }, error.DoesntTakeValue);
                     return Arg(Id){ .param = param };
                 }
 
                 if (arg.len <= next_index) {
                     const value = (try parser.iter.next()) orelse
-                        return err(diag, arg, .{ .short = short }, error.MissingValue);
+                        return parser.err(arg, .{ .short = short }, error.MissingValue);
 
                     return Arg(Id){ .param = param, .value = value };
                 }
@@ -153,7 +154,7 @@ pub fn StreamingClap(comptime Id: type, comptime ArgIterator: type) type {
                 return Arg(Id){ .param = param, .value = arg[next_index..] };
             }
 
-            return err(diag, arg, .{ .short = arg[index] }, error.InvalidArgument);
+            return parser.err(arg, .{ .short = arg[index] }, error.InvalidArgument);
         }
 
         fn positionalParam(parser: *@This()) ?*const clap.Param(Id) {
@@ -194,8 +195,8 @@ pub fn StreamingClap(comptime Id: type, comptime ArgIterator: type) type {
             return ArgInfo{ .arg = full_arg, .kind = .positional };
         }
 
-        fn err(diag: ?*clap.Diagnostic, arg: []const u8, names: clap.Names, _err: anytype) @TypeOf(_err) {
-            if (diag) |d|
+        fn err(parser: @This(), arg: []const u8, names: clap.Names, _err: anytype) @TypeOf(_err) {
+            if (parser.diagnostic) |d|
                 d.* = .{ .arg = arg, .name = names };
             return _err;
         }
@@ -210,7 +211,7 @@ fn testNoErr(params: []const clap.Param(u8), args_strings: []const []const u8, r
     };
 
     for (results) |res| {
-        const arg = (c.next(null) catch unreachable) orelse unreachable;
+        const arg = (c.next() catch unreachable) orelse unreachable;
         testing.expectEqual(res.param, arg.param);
         const expected_value = res.value orelse {
             testing.expectEqual(@as(@TypeOf(arg.value), null), arg.value);
@@ -220,22 +221,23 @@ fn testNoErr(params: []const clap.Param(u8), args_strings: []const []const u8, r
         testing.expectEqualSlices(u8, expected_value, actual_value);
     }
 
-    if (c.next(null) catch unreachable) |_|
+    if (c.next() catch unreachable) |_|
         unreachable;
 }
 
 fn testErr(params: []const clap.Param(u8), args_strings: []const []const u8, expected: []const u8) void {
-    var diag: clap.Diagnostic = undefined;
+    var diag = clap.Diagnostic{};
     var iter = args.SliceIterator{ .args = args_strings };
     var c = StreamingClap(u8, args.SliceIterator){
         .params = params,
         .iter = &iter,
+        .diagnostic = &diag,
     };
-    while (c.next(&diag) catch |err| {
+    while (c.next() catch |err| {
         var buf: [1024]u8 = undefined;
-        var slice_stream = io.fixedBufferStream(&buf);
-        diag.report(slice_stream.writer(), err) catch unreachable;
-        testing.expectEqualStrings(expected, slice_stream.getWritten());
+        var fbs = io.fixedBufferStream(&buf);
+        diag.report(fbs.writer(), err) catch unreachable;
+        testing.expectEqualStrings(expected, fbs.getWritten());
         return;
     }) |_| {}
 
@@ -244,23 +246,17 @@ fn testErr(params: []const clap.Param(u8), args_strings: []const []const u8, exp
 
 test "short params" {
     const params = [_]clap.Param(u8){
-        clap.Param(u8){
-            .id = 0,
-            .names = clap.Names{ .short = 'a' },
-        },
-        clap.Param(u8){
-            .id = 1,
-            .names = clap.Names{ .short = 'b' },
-        },
-        clap.Param(u8){
+        .{ .id = 0, .names = .{ .short = 'a' } },
+        .{ .id = 1, .names = .{ .short = 'b' } },
+        .{
             .id = 2,
-            .names = clap.Names{ .short = 'c' },
-            .takes_value = .One,
+            .names = .{ .short = 'c' },
+            .takes_value = .one,
         },
-        clap.Param(u8){
+        .{
             .id = 3,
-            .names = clap.Names{ .short = 'd' },
-            .takes_value = .Many,
+            .names = .{ .short = 'd' },
+            .takes_value = .many,
         },
     };
 
@@ -277,42 +273,36 @@ test "short params" {
             "0",  "-ac=0", "-d=0",
         },
         &[_]Arg(u8){
-            Arg(u8){ .param = a },
-            Arg(u8){ .param = b },
-            Arg(u8){ .param = a },
-            Arg(u8){ .param = b },
-            Arg(u8){ .param = b },
-            Arg(u8){ .param = a },
-            Arg(u8){ .param = c, .value = "0" },
-            Arg(u8){ .param = c, .value = "0" },
-            Arg(u8){ .param = a },
-            Arg(u8){ .param = c, .value = "0" },
-            Arg(u8){ .param = a },
-            Arg(u8){ .param = c, .value = "0" },
-            Arg(u8){ .param = d, .value = "0" },
+            .{ .param = a },
+            .{ .param = b },
+            .{ .param = a },
+            .{ .param = b },
+            .{ .param = b },
+            .{ .param = a },
+            .{ .param = c, .value = "0" },
+            .{ .param = c, .value = "0" },
+            .{ .param = a },
+            .{ .param = c, .value = "0" },
+            .{ .param = a },
+            .{ .param = c, .value = "0" },
+            .{ .param = d, .value = "0" },
         },
     );
 }
 
 test "long params" {
     const params = [_]clap.Param(u8){
-        clap.Param(u8){
-            .id = 0,
-            .names = clap.Names{ .long = "aa" },
-        },
-        clap.Param(u8){
-            .id = 1,
-            .names = clap.Names{ .long = "bb" },
-        },
-        clap.Param(u8){
+        .{ .id = 0, .names = .{ .long = "aa" } },
+        .{ .id = 1, .names = .{ .long = "bb" } },
+        .{
             .id = 2,
-            .names = clap.Names{ .long = "cc" },
-            .takes_value = .One,
+            .names = .{ .long = "cc" },
+            .takes_value = .one,
         },
-        clap.Param(u8){
+        .{
             .id = 3,
-            .names = clap.Names{ .long = "dd" },
-            .takes_value = .Many,
+            .names = .{ .long = "dd" },
+            .takes_value = .many,
         },
     };
 
@@ -329,59 +319,47 @@ test "long params" {
             "--cc=0", "--dd=0",
         },
         &[_]Arg(u8){
-            Arg(u8){ .param = aa },
-            Arg(u8){ .param = bb },
-            Arg(u8){ .param = cc, .value = "0" },
-            Arg(u8){ .param = cc, .value = "0" },
-            Arg(u8){ .param = dd, .value = "0" },
+            .{ .param = aa },
+            .{ .param = bb },
+            .{ .param = cc, .value = "0" },
+            .{ .param = cc, .value = "0" },
+            .{ .param = dd, .value = "0" },
         },
     );
 }
 
 test "positional params" {
-    const params = [_]clap.Param(u8){clap.Param(u8){
+    const params = [_]clap.Param(u8){.{
         .id = 0,
-        .takes_value = .One,
+        .takes_value = .one,
     }};
 
     testNoErr(
         &params,
         &[_][]const u8{ "aa", "bb" },
         &[_]Arg(u8){
-            Arg(u8){ .param = &params[0], .value = "aa" },
-            Arg(u8){ .param = &params[0], .value = "bb" },
+            .{ .param = &params[0], .value = "aa" },
+            .{ .param = &params[0], .value = "bb" },
         },
     );
 }
 
 test "all params" {
     const params = [_]clap.Param(u8){
-        clap.Param(u8){
+        .{
             .id = 0,
-            .names = clap.Names{
-                .short = 'a',
-                .long = "aa",
-            },
+            .names = .{ .short = 'a', .long = "aa" },
         },
-        clap.Param(u8){
+        .{
             .id = 1,
-            .names = clap.Names{
-                .short = 'b',
-                .long = "bb",
-            },
+            .names = .{ .short = 'b', .long = "bb" },
         },
-        clap.Param(u8){
+        .{
             .id = 2,
-            .names = clap.Names{
-                .short = 'c',
-                .long = "cc",
-            },
-            .takes_value = .One,
-        },
-        clap.Param(u8){
-            .id = 3,
-            .takes_value = .One,
+            .names = .{ .short = 'c', .long = "cc" },
+            .takes_value = .one,
         },
+        .{ .id = 3, .takes_value = .one },
     };
 
     const aa = &params[0];
@@ -399,46 +377,40 @@ test "all params" {
             "-",    "--",    "--cc=0", "-a",
         },
         &[_]Arg(u8){
-            Arg(u8){ .param = aa },
-            Arg(u8){ .param = bb },
-            Arg(u8){ .param = aa },
-            Arg(u8){ .param = bb },
-            Arg(u8){ .param = bb },
-            Arg(u8){ .param = aa },
-            Arg(u8){ .param = cc, .value = "0" },
-            Arg(u8){ .param = cc, .value = "0" },
-            Arg(u8){ .param = aa },
-            Arg(u8){ .param = cc, .value = "0" },
-            Arg(u8){ .param = aa },
-            Arg(u8){ .param = cc, .value = "0" },
-            Arg(u8){ .param = aa },
-            Arg(u8){ .param = bb },
-            Arg(u8){ .param = cc, .value = "0" },
-            Arg(u8){ .param = cc, .value = "0" },
-            Arg(u8){ .param = positional, .value = "something" },
-            Arg(u8){ .param = positional, .value = "-" },
-            Arg(u8){ .param = positional, .value = "--cc=0" },
-            Arg(u8){ .param = positional, .value = "-a" },
+            .{ .param = aa },
+            .{ .param = bb },
+            .{ .param = aa },
+            .{ .param = bb },
+            .{ .param = bb },
+            .{ .param = aa },
+            .{ .param = cc, .value = "0" },
+            .{ .param = cc, .value = "0" },
+            .{ .param = aa },
+            .{ .param = cc, .value = "0" },
+            .{ .param = aa },
+            .{ .param = cc, .value = "0" },
+            .{ .param = aa },
+            .{ .param = bb },
+            .{ .param = cc, .value = "0" },
+            .{ .param = cc, .value = "0" },
+            .{ .param = positional, .value = "something" },
+            .{ .param = positional, .value = "-" },
+            .{ .param = positional, .value = "--cc=0" },
+            .{ .param = positional, .value = "-a" },
         },
     );
 }
 
 test "errors" {
     const params = [_]clap.Param(u8){
-        clap.Param(u8){
+        .{
             .id = 0,
-            .names = clap.Names{
-                .short = 'a',
-                .long = "aa",
-            },
+            .names = .{ .short = 'a', .long = "aa" },
         },
-        clap.Param(u8){
+        .{
             .id = 1,
-            .names = clap.Names{
-                .short = 'c',
-                .long = "cc",
-            },
-            .takes_value = .One,
+            .names = .{ .short = 'c', .long = "cc" },
+            .takes_value = .one,
         },
     };
     testErr(&params, &[_][]const u8{"q"}, "Invalid argument 'q'\n");