Merge remote-tracking branch 'origin/master' into llvm16

1 files changed, 0 insertions, 1069 deletions

diff --git a/src/DepTokenizer.zig b/src/DepTokenizer.zig
deleted file mode 100644
index 8f9f2f81cd..0000000000
--- a/src/DepTokenizer.zig
+++ /dev/null
@@ -1,1069 +0,0 @@
-const Tokenizer = @This();
-
-index: usize = 0,
-bytes: []const u8,
-state: State = .lhs,
-
-const std = @import("std");
-const testing = std.testing;
-const assert = std.debug.assert;
-
-pub fn next(self: *Tokenizer) ?Token {
-    var start = self.index;
-    var must_resolve = false;
-    while (self.index < self.bytes.len) {
-        const char = self.bytes[self.index];
-        switch (self.state) {
-            .lhs => switch (char) {
-                '\t', '\n', '\r', ' ' => {
-                    // silently ignore whitespace
-                    self.index += 1;
-                },
-                else => {
-                    start = self.index;
-                    self.state = .target;
-                },
-            },
-            .target => switch (char) {
-                '\t', '\n', '\r', ' ' => {
-                    return errorIllegalChar(.invalid_target, self.index, char);
-                },
-                '$' => {
-                    self.state = .target_dollar_sign;
-                    self.index += 1;
-                },
-                '\\' => {
-                    self.state = .target_reverse_solidus;
-                    self.index += 1;
-                },
-                ':' => {
-                    self.state = .target_colon;
-                    self.index += 1;
-                },
-                else => {
-                    self.index += 1;
-                },
-            },
-            .target_reverse_solidus => switch (char) {
-                '\t', '\n', '\r' => {
-                    return errorIllegalChar(.bad_target_escape, self.index, char);
-                },
-                ' ', '#', '\\' => {
-                    must_resolve = true;
-                    self.state = .target;
-                    self.index += 1;
-                },
-                '$' => {
-                    self.state = .target_dollar_sign;
-                    self.index += 1;
-                },
-                else => {
-                    self.state = .target;
-                    self.index += 1;
-                },
-            },
-            .target_dollar_sign => switch (char) {
-                '$' => {
-                    must_resolve = true;
-                    self.state = .target;
-                    self.index += 1;
-                },
-                else => {
-                    return errorIllegalChar(.expected_dollar_sign, self.index, char);
-                },
-            },
-            .target_colon => switch (char) {
-                '\n', '\r' => {
-                    const bytes = self.bytes[start .. self.index - 1];
-                    if (bytes.len != 0) {
-                        self.state = .lhs;
-                        return finishTarget(must_resolve, bytes);
-                    }
-                    // silently ignore null target
-                    self.state = .lhs;
-                },
-                '/', '\\' => {
-                    self.state = .target_colon_reverse_solidus;
-                    self.index += 1;
-                },
-                else => {
-                    const bytes = self.bytes[start .. self.index - 1];
-                    if (bytes.len != 0) {
-                        self.state = .rhs;
-                        return finishTarget(must_resolve, bytes);
-                    }
-                    // silently ignore null target
-                    self.state = .lhs;
-                },
-            },
-            .target_colon_reverse_solidus => switch (char) {
-                '\n', '\r' => {
-                    const bytes = self.bytes[start .. self.index - 2];
-                    if (bytes.len != 0) {
-                        self.state = .lhs;
-                        return finishTarget(must_resolve, bytes);
-                    }
-                    // silently ignore null target
-                    self.state = .lhs;
-                },
-                else => {
-                    self.state = .target;
-                },
-            },
-            .rhs => switch (char) {
-                '\t', ' ' => {
-                    // silently ignore horizontal whitespace
-                    self.index += 1;
-                },
-                '\n', '\r' => {
-                    self.state = .lhs;
-                },
-                '\\' => {
-                    self.state = .rhs_continuation;
-                    self.index += 1;
-                },
-                '"' => {
-                    self.state = .prereq_quote;
-                    self.index += 1;
-                    start = self.index;
-                },
-                else => {
-                    start = self.index;
-                    self.state = .prereq;
-                },
-            },
-            .rhs_continuation => switch (char) {
-                '\n' => {
-                    self.state = .rhs;
-                    self.index += 1;
-                },
-                '\r' => {
-                    self.state = .rhs_continuation_linefeed;
-                    self.index += 1;
-                },
-                else => {
-                    return errorIllegalChar(.continuation_eol, self.index, char);
-                },
-            },
-            .rhs_continuation_linefeed => switch (char) {
-                '\n' => {
-                    self.state = .rhs;
-                    self.index += 1;
-                },
-                else => {
-                    return errorIllegalChar(.continuation_eol, self.index, char);
-                },
-            },
-            .prereq_quote => switch (char) {
-                '"' => {
-                    self.index += 1;
-                    self.state = .rhs;
-                    return Token{ .prereq = self.bytes[start .. self.index - 1] };
-                },
-                else => {
-                    self.index += 1;
-                },
-            },
-            .prereq => switch (char) {
-                '\t', ' ' => {
-                    self.state = .rhs;
-                    return Token{ .prereq = self.bytes[start..self.index] };
-                },
-                '\n', '\r' => {
-                    self.state = .lhs;
-                    return Token{ .prereq = self.bytes[start..self.index] };
-                },
-                '\\' => {
-                    self.state = .prereq_continuation;
-                    self.index += 1;
-                },
-                else => {
-                    self.index += 1;
-                },
-            },
-            .prereq_continuation => switch (char) {
-                '\n' => {
-                    self.index += 1;
-                    self.state = .rhs;
-                    return Token{ .prereq = self.bytes[start .. self.index - 2] };
-                },
-                '\r' => {
-                    self.state = .prereq_continuation_linefeed;
-                    self.index += 1;
-                },
-                else => {
-                    // not continuation
-                    self.state = .prereq;
-                    self.index += 1;
-                },
-            },
-            .prereq_continuation_linefeed => switch (char) {
-                '\n' => {
-                    self.index += 1;
-                    self.state = .rhs;
-                    return Token{ .prereq = self.bytes[start .. self.index - 1] };
-                },
-                else => {
-                    return errorIllegalChar(.continuation_eol, self.index, char);
-                },
-            },
-        }
-    } else {
-        switch (self.state) {
-            .lhs,
-            .rhs,
-            .rhs_continuation,
-            .rhs_continuation_linefeed,
-            => return null,
-            .target => {
-                return errorPosition(.incomplete_target, start, self.bytes[start..]);
-            },
-            .target_reverse_solidus,
-            .target_dollar_sign,
-            => {
-                const idx = self.index - 1;
-                return errorIllegalChar(.incomplete_escape, idx, self.bytes[idx]);
-            },
-            .target_colon => {
-                const bytes = self.bytes[start .. self.index - 1];
-                if (bytes.len != 0) {
-                    self.index += 1;
-                    self.state = .rhs;
-                    return finishTarget(must_resolve, bytes);
-                }
-                // silently ignore null target
-                self.state = .lhs;
-                return null;
-            },
-            .target_colon_reverse_solidus => {
-                const bytes = self.bytes[start .. self.index - 2];
-                if (bytes.len != 0) {
-                    self.index += 1;
-                    self.state = .rhs;
-                    return finishTarget(must_resolve, bytes);
-                }
-                // silently ignore null target
-                self.state = .lhs;
-                return null;
-            },
-            .prereq_quote => {
-                return errorPosition(.incomplete_quoted_prerequisite, start, self.bytes[start..]);
-            },
-            .prereq => {
-                self.state = .lhs;
-                return Token{ .prereq = self.bytes[start..] };
-            },
-            .prereq_continuation => {
-                self.state = .lhs;
-                return Token{ .prereq = self.bytes[start .. self.index - 1] };
-            },
-            .prereq_continuation_linefeed => {
-                self.state = .lhs;
-                return Token{ .prereq = self.bytes[start .. self.index - 2] };
-            },
-        }
-    }
-    unreachable;
-}
-
-fn errorPosition(comptime id: std.meta.Tag(Token), index: usize, bytes: []const u8) Token {
-    return @unionInit(Token, @tagName(id), .{ .index = index, .bytes = bytes });
-}
-
-fn errorIllegalChar(comptime id: std.meta.Tag(Token), index: usize, char: u8) Token {
-    return @unionInit(Token, @tagName(id), .{ .index = index, .char = char });
-}
-
-fn finishTarget(must_resolve: bool, bytes: []const u8) Token {
-    return if (must_resolve) .{ .target_must_resolve = bytes } else .{ .target = bytes };
-}
-
-const State = enum {
-    lhs,
-    target,
-    target_reverse_solidus,
-    target_dollar_sign,
-    target_colon,
-    target_colon_reverse_solidus,
-    rhs,
-    rhs_continuation,
-    rhs_continuation_linefeed,
-    prereq_quote,
-    prereq,
-    prereq_continuation,
-    prereq_continuation_linefeed,
-};
-
-pub const Token = union(enum) {
-    target: []const u8,
-    target_must_resolve: []const u8,
-    prereq: []const u8,
-
-    incomplete_quoted_prerequisite: IndexAndBytes,
-    incomplete_target: IndexAndBytes,
-
-    invalid_target: IndexAndChar,
-    bad_target_escape: IndexAndChar,
-    expected_dollar_sign: IndexAndChar,
-    continuation_eol: IndexAndChar,
-    incomplete_escape: IndexAndChar,
-
-    pub const IndexAndChar = struct {
-        index: usize,
-        char: u8,
-    };
-
-    pub const IndexAndBytes = struct {
-        index: usize,
-        bytes: []const u8,
-    };
-
-    /// Resolve escapes in target. Only valid with .target_must_resolve.
-    pub fn resolve(self: Token, writer: anytype) @TypeOf(writer).Error!void {
-        const bytes = self.target_must_resolve; // resolve called on incorrect token
-
-        var state: enum { start, escape, dollar } = .start;
-        for (bytes) |c| {
-            switch (state) {
-                .start => {
-                    switch (c) {
-                        '\\' => state = .escape,
-                        '$' => state = .dollar,
-                        else => try writer.writeByte(c),
-                    }
-                },
-                .escape => {
-                    switch (c) {
-                        ' ', '#', '\\' => {},
-                        '$' => {
-                            try writer.writeByte('\\');
-                            state = .dollar;
-                            continue;
-                        },
-                        else => try writer.writeByte('\\'),
-                    }
-                    try writer.writeByte(c);
-                    state = .start;
-                },
-                .dollar => {
-                    try writer.writeByte('$');
-                    switch (c) {
-                        '$' => {},
-                        else => try writer.writeByte(c),
-                    }
-                    state = .start;
-                },
-            }
-        }
-    }
-
-    pub fn printError(self: Token, writer: anytype) @TypeOf(writer).Error!void {
-        switch (self) {
-            .target, .target_must_resolve, .prereq => unreachable, // not an error
-            .incomplete_quoted_prerequisite,
-            .incomplete_target,
-            => |index_and_bytes| {
-                try writer.print("{s} '", .{self.errStr()});
-                if (self == .incomplete_target) {
-                    const tmp = Token{ .target_must_resolve = index_and_bytes.bytes };
-                    try tmp.resolve(writer);
-                } else {
-                    try printCharValues(writer, index_and_bytes.bytes);
-                }
-                try writer.print("' at position {d}", .{index_and_bytes.index});
-            },
-            .invalid_target,
-            .bad_target_escape,
-            .expected_dollar_sign,
-            .continuation_eol,
-            .incomplete_escape,
-            => |index_and_char| {
-                try writer.writeAll("illegal char ");
-                try printUnderstandableChar(writer, index_and_char.char);
-                try writer.print(" at position {d}: {s}", .{ index_and_char.index, self.errStr() });
-            },
-        }
-    }
-
-    fn errStr(self: Token) []const u8 {
-        return switch (self) {
-            .target, .target_must_resolve, .prereq => unreachable, // not an error
-            .incomplete_quoted_prerequisite => "incomplete quoted prerequisite",
-            .incomplete_target => "incomplete target",
-            .invalid_target => "invalid target",
-            .bad_target_escape => "bad target escape",
-            .expected_dollar_sign => "expecting '$'",
-            .continuation_eol => "continuation expecting end-of-line",
-            .incomplete_escape => "incomplete escape",
-        };
-    }
-};
-
-test "empty file" {
-    try depTokenizer("", "");
-}
-
-test "empty whitespace" {
-    try depTokenizer("\n", "");
-    try depTokenizer("\r", "");
-    try depTokenizer("\r\n", "");
-    try depTokenizer(" ", "");
-}
-
-test "empty colon" {
-    try depTokenizer(":", "");
-    try depTokenizer("\n:", "");
-    try depTokenizer("\r:", "");
-    try depTokenizer("\r\n:", "");
-    try depTokenizer(" :", "");
-}
-
-test "empty target" {
-    try depTokenizer("foo.o:", "target = {foo.o}");
-    try depTokenizer(
-        \\foo.o:
-        \\bar.o:
-        \\abcd.o:
-    ,
-        \\target = {foo.o}
-        \\target = {bar.o}
-        \\target = {abcd.o}
-    );
-}
-
-test "whitespace empty target" {
-    try depTokenizer("\nfoo.o:", "target = {foo.o}");
-    try depTokenizer("\rfoo.o:", "target = {foo.o}");
-    try depTokenizer("\r\nfoo.o:", "target = {foo.o}");
-    try depTokenizer(" foo.o:", "target = {foo.o}");
-}
-
-test "escape empty target" {
-    try depTokenizer("\\ foo.o:", "target = { foo.o}");
-    try depTokenizer("\\#foo.o:", "target = {#foo.o}");
-    try depTokenizer("\\\\foo.o:", "target = {\\foo.o}");
-    try depTokenizer("$$foo.o:", "target = {$foo.o}");
-}
-
-test "empty target linefeeds" {
-    try depTokenizer("\n", "");
-    try depTokenizer("\r\n", "");
-
-    const expect = "target = {foo.o}";
-    try depTokenizer(
-        \\foo.o:
-    , expect);
-    try depTokenizer(
-        \\foo.o:
-        \\
-    , expect);
-    try depTokenizer(
-        \\foo.o:
-    , expect);
-    try depTokenizer(
-        \\foo.o:
-        \\
-    , expect);
-}
-
-test "empty target linefeeds + continuations" {
-    const expect = "target = {foo.o}";
-    try depTokenizer(
-        \\foo.o:\
-    , expect);
-    try depTokenizer(
-        \\foo.o:\
-        \\
-    , expect);
-    try depTokenizer(
-        \\foo.o:\
-    , expect);
-    try depTokenizer(
-        \\foo.o:\
-        \\
-    , expect);
-}
-
-test "empty target linefeeds + hspace + continuations" {
-    const expect = "target = {foo.o}";
-    try depTokenizer(
-        \\foo.o: \
-    , expect);
-    try depTokenizer(
-        \\foo.o: \
-        \\
-    , expect);
-    try depTokenizer(
-        \\foo.o: \
-    , expect);
-    try depTokenizer(
-        \\foo.o: \
-        \\
-    , expect);
-}
-
-test "prereq" {
-    const expect =
-        \\target = {foo.o}
-        \\prereq = {foo.c}
-    ;
-    try depTokenizer("foo.o: foo.c", expect);
-    try depTokenizer(
-        \\foo.o: \
-        \\foo.c
-    , expect);
-    try depTokenizer(
-        \\foo.o: \
-        \\ foo.c
-    , expect);
-    try depTokenizer(
-        \\foo.o:    \
-        \\    foo.c
-    , expect);
-}
-
-test "prereq continuation" {
-    const expect =
-        \\target = {foo.o}
-        \\prereq = {foo.h}
-        \\prereq = {bar.h}
-    ;
-    try depTokenizer(
-        \\foo.o: foo.h\
-        \\bar.h
-    , expect);
-    try depTokenizer(
-        \\foo.o: foo.h\
-        \\bar.h
-    , expect);
-}
-
-test "multiple prereqs" {
-    const expect =
-        \\target = {foo.o}
-        \\prereq = {foo.c}
-        \\prereq = {foo.h}
-        \\prereq = {bar.h}
-    ;
-    try depTokenizer("foo.o: foo.c foo.h bar.h", expect);
-    try depTokenizer(
-        \\foo.o: \
-        \\foo.c foo.h bar.h
-    , expect);
-    try depTokenizer(
-        \\foo.o: foo.c foo.h bar.h\
-    , expect);
-    try depTokenizer(
-        \\foo.o: foo.c foo.h bar.h\
-        \\
-    , expect);
-    try depTokenizer(
-        \\foo.o: \
-        \\foo.c       \
-        \\     foo.h\
-        \\bar.h
-        \\
-    , expect);
-    try depTokenizer(
-        \\foo.o: \
-        \\foo.c       \
-        \\     foo.h\
-        \\bar.h\
-        \\
-    , expect);
-    try depTokenizer(
-        \\foo.o: \
-        \\foo.c       \
-        \\     foo.h\
-        \\bar.h\
-    , expect);
-}
-
-test "multiple targets and prereqs" {
-    try depTokenizer(
-        \\foo.o: foo.c
-        \\bar.o: bar.c a.h b.h c.h
-        \\abc.o: abc.c \
-        \\  one.h two.h \
-        \\  three.h four.h
-    ,
-        \\target = {foo.o}
-        \\prereq = {foo.c}
-        \\target = {bar.o}
-        \\prereq = {bar.c}
-        \\prereq = {a.h}
-        \\prereq = {b.h}
-        \\prereq = {c.h}
-        \\target = {abc.o}
-        \\prereq = {abc.c}
-        \\prereq = {one.h}
-        \\prereq = {two.h}
-        \\prereq = {three.h}
-        \\prereq = {four.h}
-    );
-    try depTokenizer(
-        \\ascii.o: ascii.c
-        \\base64.o: base64.c stdio.h
-        \\elf.o: elf.c a.h b.h c.h
-        \\macho.o: \
-        \\  macho.c\
-        \\  a.h b.h c.h
-    ,
-        \\target = {ascii.o}
-        \\prereq = {ascii.c}
-        \\target = {base64.o}
-        \\prereq = {base64.c}
-        \\prereq = {stdio.h}
-        \\target = {elf.o}
-        \\prereq = {elf.c}
-        \\prereq = {a.h}
-        \\prereq = {b.h}
-        \\prereq = {c.h}
-        \\target = {macho.o}
-        \\prereq = {macho.c}
-        \\prereq = {a.h}
-        \\prereq = {b.h}
-        \\prereq = {c.h}
-    );
-    try depTokenizer(
-        \\a$$scii.o: ascii.c
-        \\\\base64.o: "\base64.c" "s t#dio.h"
-        \\e\\lf.o: "e\lf.c" "a.h$$" "$$b.h c.h$$"
-        \\macho.o: \
-        \\  "macho!.c" \
-        \\  a.h b.h c.h
-    ,
-        \\target = {a$scii.o}
-        \\prereq = {ascii.c}
-        \\target = {\base64.o}
-        \\prereq = {\base64.c}
-        \\prereq = {s t#dio.h}
-        \\target = {e\lf.o}
-        \\prereq = {e\lf.c}
-        \\prereq = {a.h$$}
-        \\prereq = {$$b.h c.h$$}
-        \\target = {macho.o}
-        \\prereq = {macho!.c}
-        \\prereq = {a.h}
-        \\prereq = {b.h}
-        \\prereq = {c.h}
-    );
-}
-
-test "windows quoted prereqs" {
-    try depTokenizer(
-        \\c:\foo.o: "C:\Program Files (x86)\Microsoft Visual Studio\foo.c"
-        \\c:\foo2.o: "C:\Program Files (x86)\Microsoft Visual Studio\foo2.c" \
-        \\  "C:\Program Files (x86)\Microsoft Visual Studio\foo1.h" \
-        \\  "C:\Program Files (x86)\Microsoft Visual Studio\foo2.h"
-    ,
-        \\target = {c:\foo.o}
-        \\prereq = {C:\Program Files (x86)\Microsoft Visual Studio\foo.c}
-        \\target = {c:\foo2.o}
-        \\prereq = {C:\Program Files (x86)\Microsoft Visual Studio\foo2.c}
-        \\prereq = {C:\Program Files (x86)\Microsoft Visual Studio\foo1.h}
-        \\prereq = {C:\Program Files (x86)\Microsoft Visual Studio\foo2.h}
-    );
-}
-
-test "windows mixed prereqs" {
-    try depTokenizer(
-        \\cimport.o: \
-        \\  C:\msys64\home\anon\project\zig\master\zig-cache\o\qhvhbUo7GU5iKyQ5mpA8TcQpncCYaQu0wwvr3ybiSTj_Dtqi1Nmcb70kfODJ2Qlg\cimport.h \
-        \\  "C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\stdio.h" \
-        \\  "C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt.h" \
-        \\  "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.21.27702\lib\x64\\..\..\include\vcruntime.h" \
-        \\  "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.21.27702\lib\x64\\..\..\include\sal.h" \
-        \\  "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.21.27702\lib\x64\\..\..\include\concurrencysal.h" \
-        \\  C:\msys64\opt\zig\lib\zig\include\vadefs.h \
-        \\  "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.21.27702\lib\x64\\..\..\include\vadefs.h" \
-        \\  "C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt_wstdio.h" \
-        \\  "C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt_stdio_config.h" \
-        \\  "C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\string.h" \
-        \\  "C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt_memory.h" \
-        \\  "C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt_memcpy_s.h" \
-        \\  "C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\errno.h" \
-        \\  "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.21.27702\lib\x64\\..\..\include\vcruntime_string.h" \
-        \\  "C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt_wstring.h"
-    ,
-        \\target = {cimport.o}
-        \\prereq = {C:\msys64\home\anon\project\zig\master\zig-cache\o\qhvhbUo7GU5iKyQ5mpA8TcQpncCYaQu0wwvr3ybiSTj_Dtqi1Nmcb70kfODJ2Qlg\cimport.h}
-        \\prereq = {C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\stdio.h}
-        \\prereq = {C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt.h}
-        \\prereq = {C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.21.27702\lib\x64\\..\..\include\vcruntime.h}
-        \\prereq = {C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.21.27702\lib\x64\\..\..\include\sal.h}
-        \\prereq = {C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.21.27702\lib\x64\\..\..\include\concurrencysal.h}
-        \\prereq = {C:\msys64\opt\zig\lib\zig\include\vadefs.h}
-        \\prereq = {C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.21.27702\lib\x64\\..\..\include\vadefs.h}
-        \\prereq = {C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt_wstdio.h}
-        \\prereq = {C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt_stdio_config.h}
-        \\prereq = {C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\string.h}
-        \\prereq = {C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt_memory.h}
-        \\prereq = {C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt_memcpy_s.h}
-        \\prereq = {C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\errno.h}
-        \\prereq = {C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.21.27702\lib\x64\\..\..\include\vcruntime_string.h}
-        \\prereq = {C:\Program Files (x86)\Windows Kits\10\\Include\10.0.17763.0\ucrt\corecrt_wstring.h}
-    );
-}
-
-test "windows funky targets" {
-    try depTokenizer(
-        \\C:\Users\anon\foo.o:
-        \\C:\Users\anon\foo\ .o:
-        \\C:\Users\anon\foo\#.o:
-        \\C:\Users\anon\foo$$.o:
-        \\C:\Users\anon\\\ foo.o:
-        \\C:\Users\anon\\#foo.o:
-        \\C:\Users\anon\$$foo.o:
-        \\C:\Users\anon\\\ \ \ \ \ foo.o:
-    ,
-        \\target = {C:\Users\anon\foo.o}
-        \\target = {C:\Users\anon\foo .o}
-        \\target = {C:\Users\anon\foo#.o}
-        \\target = {C:\Users\anon\foo$.o}
-        \\target = {C:\Users\anon\ foo.o}
-        \\target = {C:\Users\anon\#foo.o}
-        \\target = {C:\Users\anon\$foo.o}
-        \\target = {C:\Users\anon\     foo.o}
-    );
-}
-
-test "windows drive and forward slashes" {
-    try depTokenizer(
-        \\C:/msys64/what/zig-cache\tmp\48ac4d78dd531abd-cxa_thread_atexit.obj: \
-        \\  C:/msys64/opt/zig3/lib/zig/libc/mingw/crt/cxa_thread_atexit.c
-    ,
-        \\target = {C:/msys64/what/zig-cache\tmp\48ac4d78dd531abd-cxa_thread_atexit.obj}
-        \\prereq = {C:/msys64/opt/zig3/lib/zig/libc/mingw/crt/cxa_thread_atexit.c}
-    );
-}
-
-test "error incomplete escape - reverse_solidus" {
-    try depTokenizer("\\",
-        \\ERROR: illegal char '\' at position 0: incomplete escape
-    );
-    try depTokenizer("\t\\",
-        \\ERROR: illegal char '\' at position 1: incomplete escape
-    );
-    try depTokenizer("\n\\",
-        \\ERROR: illegal char '\' at position 1: incomplete escape
-    );
-    try depTokenizer("\r\\",
-        \\ERROR: illegal char '\' at position 1: incomplete escape
-    );
-    try depTokenizer("\r\n\\",
-        \\ERROR: illegal char '\' at position 2: incomplete escape
-    );
-    try depTokenizer(" \\",
-        \\ERROR: illegal char '\' at position 1: incomplete escape
-    );
-}
-
-test "error incomplete escape - dollar_sign" {
-    try depTokenizer("$",
-        \\ERROR: illegal char '$' at position 0: incomplete escape
-    );
-    try depTokenizer("\t$",
-        \\ERROR: illegal char '$' at position 1: incomplete escape
-    );
-    try depTokenizer("\n$",
-        \\ERROR: illegal char '$' at position 1: incomplete escape
-    );
-    try depTokenizer("\r$",
-        \\ERROR: illegal char '$' at position 1: incomplete escape
-    );
-    try depTokenizer("\r\n$",
-        \\ERROR: illegal char '$' at position 2: incomplete escape
-    );
-    try depTokenizer(" $",
-        \\ERROR: illegal char '$' at position 1: incomplete escape
-    );
-}
-
-test "error incomplete target" {
-    try depTokenizer("foo.o",
-        \\ERROR: incomplete target 'foo.o' at position 0
-    );
-    try depTokenizer("\tfoo.o",
-        \\ERROR: incomplete target 'foo.o' at position 1
-    );
-    try depTokenizer("\nfoo.o",
-        \\ERROR: incomplete target 'foo.o' at position 1
-    );
-    try depTokenizer("\rfoo.o",
-        \\ERROR: incomplete target 'foo.o' at position 1
-    );
-    try depTokenizer("\r\nfoo.o",
-        \\ERROR: incomplete target 'foo.o' at position 2
-    );
-    try depTokenizer(" foo.o",
-        \\ERROR: incomplete target 'foo.o' at position 1
-    );
-
-    try depTokenizer("\\ foo.o",
-        \\ERROR: incomplete target ' foo.o' at position 0
-    );
-    try depTokenizer("\\#foo.o",
-        \\ERROR: incomplete target '#foo.o' at position 0
-    );
-    try depTokenizer("\\\\foo.o",
-        \\ERROR: incomplete target '\foo.o' at position 0
-    );
-    try depTokenizer("$$foo.o",
-        \\ERROR: incomplete target '$foo.o' at position 0
-    );
-}
-
-test "error illegal char at position - bad target escape" {
-    try depTokenizer("\\\t",
-        \\ERROR: illegal char \x09 at position 1: bad target escape
-    );
-    try depTokenizer("\\\n",
-        \\ERROR: illegal char \x0A at position 1: bad target escape
-    );
-    try depTokenizer("\\\r",
-        \\ERROR: illegal char \x0D at position 1: bad target escape
-    );
-    try depTokenizer("\\\r\n",
-        \\ERROR: illegal char \x0D at position 1: bad target escape
-    );
-}
-
-test "error illegal char at position - execting dollar_sign" {
-    try depTokenizer("$\t",
-        \\ERROR: illegal char \x09 at position 1: expecting '$'
-    );
-    try depTokenizer("$\n",
-        \\ERROR: illegal char \x0A at position 1: expecting '$'
-    );
-    try depTokenizer("$\r",
-        \\ERROR: illegal char \x0D at position 1: expecting '$'
-    );
-    try depTokenizer("$\r\n",
-        \\ERROR: illegal char \x0D at position 1: expecting '$'
-    );
-}
-
-test "error illegal char at position - invalid target" {
-    try depTokenizer("foo\t.o",
-        \\ERROR: illegal char \x09 at position 3: invalid target
-    );
-    try depTokenizer("foo\n.o",
-        \\ERROR: illegal char \x0A at position 3: invalid target
-    );
-    try depTokenizer("foo\r.o",
-        \\ERROR: illegal char \x0D at position 3: invalid target
-    );
-    try depTokenizer("foo\r\n.o",
-        \\ERROR: illegal char \x0D at position 3: invalid target
-    );
-}
-
-test "error target - continuation expecting end-of-line" {
-    try depTokenizer("foo.o: \\\t",
-        \\target = {foo.o}
-        \\ERROR: illegal char \x09 at position 8: continuation expecting end-of-line
-    );
-    try depTokenizer("foo.o: \\ ",
-        \\target = {foo.o}
-        \\ERROR: illegal char ' ' at position 8: continuation expecting end-of-line
-    );
-    try depTokenizer("foo.o: \\x",
-        \\target = {foo.o}
-        \\ERROR: illegal char 'x' at position 8: continuation expecting end-of-line
-    );
-    try depTokenizer("foo.o: \\\x0dx",
-        \\target = {foo.o}
-        \\ERROR: illegal char 'x' at position 9: continuation expecting end-of-line
-    );
-}
-
-test "error prereq - continuation expecting end-of-line" {
-    try depTokenizer("foo.o: foo.h\\\x0dx",
-        \\target = {foo.o}
-        \\ERROR: illegal char 'x' at position 14: continuation expecting end-of-line
-    );
-}
-
-// - tokenize input, emit textual representation, and compare to expect
-fn depTokenizer(input: []const u8, expect: []const u8) !void {
-    var arena_allocator = std.heap.ArenaAllocator.init(std.testing.allocator);
-    const arena = arena_allocator.allocator();
-    defer arena_allocator.deinit();
-
-    var it: Tokenizer = .{ .bytes = input };
-    var buffer = std.ArrayList(u8).init(arena);
-    var resolve_buf = std.ArrayList(u8).init(arena);
-    var i: usize = 0;
-    while (it.next()) |token| {
-        if (i != 0) try buffer.appendSlice("\n");
-        switch (token) {
-            .target, .prereq => |bytes| {
-                try buffer.appendSlice(@tagName(token));
-                try buffer.appendSlice(" = {");
-                for (bytes) |b| {
-                    try buffer.append(printable_char_tab[b]);
-                }
-                try buffer.appendSlice("}");
-            },
-            .target_must_resolve => {
-                try buffer.appendSlice("target = {");
-                try token.resolve(resolve_buf.writer());
-                for (resolve_buf.items) |b| {
-                    try buffer.append(printable_char_tab[b]);
-                }
-                resolve_buf.items.len = 0;
-                try buffer.appendSlice("}");
-            },
-            else => {
-                try buffer.appendSlice("ERROR: ");
-                try token.printError(buffer.writer());
-                break;
-            },
-        }
-        i += 1;
-    }
-
-    if (std.mem.eql(u8, expect, buffer.items)) {
-        try testing.expect(true);
-        return;
-    }
-
-    const out = std.io.getStdErr().writer();
-
-    try out.writeAll("\n");
-    try printSection(out, "<<<< input", input);
-    try printSection(out, "==== expect", expect);
-    try printSection(out, ">>>> got", buffer.items);
-    try printRuler(out);
-
-    try testing.expect(false);
-}
-
-fn printSection(out: anytype, label: []const u8, bytes: []const u8) !void {
-    try printLabel(out, label, bytes);
-    try hexDump(out, bytes);
-    try printRuler(out);
-    try out.writeAll(bytes);
-    try out.writeAll("\n");
-}
-
-fn printLabel(out: anytype, label: []const u8, bytes: []const u8) !void {
-    var buf: [80]u8 = undefined;
-    var text = try std.fmt.bufPrint(buf[0..], "{s} {d} bytes ", .{ label, bytes.len });
-    try out.writeAll(text);
-    var i: usize = text.len;
-    const end = 79;
-    while (i < end) : (i += 1) {
-        try out.writeAll(&[_]u8{label[0]});
-    }
-    try out.writeAll("\n");
-}
-
-fn printRuler(out: anytype) !void {
-    var i: usize = 0;
-    const end = 79;
-    while (i < end) : (i += 1) {
-        try out.writeAll("-");
-    }
-    try out.writeAll("\n");
-}
-
-fn hexDump(out: anytype, bytes: []const u8) !void {
-    const n16 = bytes.len >> 4;
-    var line: usize = 0;
-    var offset: usize = 0;
-    while (line < n16) : (line += 1) {
-        try hexDump16(out, offset, bytes[offset .. offset + 16]);
-        offset += 16;
-    }
-
-    const n = bytes.len & 0x0f;
-    if (n > 0) {
-        try printDecValue(out, offset, 8);
-        try out.writeAll(":");
-        try out.writeAll(" ");
-        var end1 = std.math.min(offset + n, offset + 8);
-        for (bytes[offset..end1]) |b| {
-            try out.writeAll(" ");
-            try printHexValue(out, b, 2);
-        }
-        var end2 = offset + n;
-        if (end2 > end1) {
-            try out.writeAll(" ");
-            for (bytes[end1..end2]) |b| {
-                try out.writeAll(" ");
-                try printHexValue(out, b, 2);
-            }
-        }
-        const short = 16 - n;
-        var i: usize = 0;
-        while (i < short) : (i += 1) {
-            try out.writeAll("   ");
-        }
-        if (end2 > end1) {
-            try out.writeAll("  |");
-        } else {
-            try out.writeAll("   |");
-        }
-        try printCharValues(out, bytes[offset..end2]);
-        try out.writeAll("|\n");
-        offset += n;
-    }
-
-    try printDecValue(out, offset, 8);
-    try out.writeAll(":");
-    try out.writeAll("\n");
-}
-
-fn hexDump16(out: anytype, offset: usize, bytes: []const u8) !void {
-    try printDecValue(out, offset, 8);
-    try out.writeAll(":");
-    try out.writeAll(" ");
-    for (bytes[0..8]) |b| {
-        try out.writeAll(" ");
-        try printHexValue(out, b, 2);
-    }
-    try out.writeAll(" ");
-    for (bytes[8..16]) |b| {
-        try out.writeAll(" ");
-        try printHexValue(out, b, 2);
-    }
-    try out.writeAll("  |");
-    try printCharValues(out, bytes);
-    try out.writeAll("|\n");
-}
-
-fn printDecValue(out: anytype, value: u64, width: u8) !void {
-    var buffer: [20]u8 = undefined;
-    const len = std.fmt.formatIntBuf(buffer[0..], value, 10, .lower, .{ .width = width, .fill = '0' });
-    try out.writeAll(buffer[0..len]);
-}
-
-fn printHexValue(out: anytype, value: u64, width: u8) !void {
-    var buffer: [16]u8 = undefined;
-    const len = std.fmt.formatIntBuf(buffer[0..], value, 16, .lower, .{ .width = width, .fill = '0' });
-    try out.writeAll(buffer[0..len]);
-}
-
-fn printCharValues(out: anytype, bytes: []const u8) !void {
-    for (bytes) |b| {
-        try out.writeAll(&[_]u8{printable_char_tab[b]});
-    }
-}
-
-fn printUnderstandableChar(out: anytype, char: u8) !void {
-    if (std.ascii.isPrint(char)) {
-        try out.print("'{c}'", .{char});
-    } else {
-        try out.print("\\x{X:0>2}", .{char});
-    }
-}
-
-// zig fmt: off
-const printable_char_tab: [256]u8 = (
-    "................................ !\"#$%&'()*+,-./0123456789:;<=>?" ++
-    "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~." ++
-    "................................................................" ++
-    "................................................................"
-).*;