update usage of some deprecated standard library functions

Author: Techatrix

examples/hello_server.zig

@@ -113,7 +113,7 @@ pub fn main(init: std.process.Init) !void {
                         try transport.writeResponse(io, gpa, request.id, void, {}, .{});
                         continue;
                     };
-                    const source_z = try gpa.dupeZ(u8, source);
+                    const source_z = try gpa.dupeSentinel(u8, source, 0);
                     defer gpa.free(source_z);
 
                     var tree: std.zig.Ast = try .parse(gpa, source_z, .zig);

examples/my_first_server.zig

@@ -38,7 +38,7 @@ pub const Handler = struct {
     fn init(allocator: std.mem.Allocator) Handler {
         return .{
             .allocator = allocator,
-            .files = .{},
+            .files = .empty,
             // The default position encoding is UTF-16.
             // The agreed upon encoding between server client is actually decided during `initialize`.
             .offset_encoding = .@"utf-16",

src/codegen/codegen.zig

@@ -29,7 +29,7 @@ pub fn main(init: std.process.Init.Minimal) !u8 {
     var zig_tree: std.zig.Ast = try .parse(gpa, source, .zig);
     defer zig_tree.deinit(gpa);
 
-    std.Io.Dir.cwd().createDirPath(io, std.fs.path.dirname(out_file_path) orelse ".") catch {};
+    std.Io.Dir.cwd().createDirPath(io, std.Io.Dir.path.dirname(out_file_path) orelse ".") catch {};
 
     var out_file = try std.Io.Dir.cwd().createFile(io, out_file_path, .{});
     defer out_file.close(io);
@@ -750,7 +750,7 @@ const SymbolNamespaceIterator = struct {
         switch (it.direction) {
             .forward => {
                 if (it.index == it.name.len) return null;
-                const new_index = std.mem.indexOfScalarPos(u8, it.name, it.index, '.') orelse {
+                const new_index = std.mem.findScalarPos(u8, it.name, it.index, '.') orelse {
                     defer it.index = it.name.len;
                     return it.name[it.index..];
                 };
@@ -760,7 +760,7 @@ const SymbolNamespaceIterator = struct {
             .reverse => {
                 if (it.index == 0) return null;
                 const name = it.name[0..it.index];
-                const new_index = std.mem.lastIndexOfScalar(u8, name, '.') orelse {
+                const new_index = std.mem.findScalarLast(u8, name, '.') orelse {
                     it.index = 0;
                     return name;
                 };

src/lsp.zig

@@ -982,7 +982,7 @@ pub const BaseProtocolHeader = struct {
 
             if (header.len == 0) break;
 
-            const colon_index = std.mem.indexOf(u8, header, ": ") orelse return error.InvalidHeaderField;
+            const colon_index = std.mem.find(u8, header, ": ") orelse return error.InvalidHeaderField;
 
             const header_name = header[0..colon_index];
             const header_value = header[colon_index + 2 ..];

src/offsets.zig

@@ -32,7 +32,7 @@ pub const Position = types.Position;
 pub const Range = types.Range;
 
 pub fn indexToPosition(text: []const u8, index: usize, encoding: Encoding) Position {
-    const last_line_start = if (std.mem.lastIndexOfScalar(u8, text[0..index], '\n')) |line| line + 1 else 0;
+    const last_line_start = if (std.mem.findScalarLast(u8, text[0..index], '\n')) |line| line + 1 else 0;
     const line_count = std.mem.count(u8, text[0..last_line_start], "\n");
 
     return .{
@@ -248,8 +248,8 @@ test rangeToSlice {
 
 pub fn lineLocAtIndex(text: []const u8, index: usize) Loc {
     return .{
-        .start = if (std.mem.lastIndexOfScalar(u8, text[0..index], '\n')) |idx| idx + 1 else 0,
-        .end = std.mem.indexOfScalarPos(u8, text, index, '\n') orelse text.len,
+        .start = if (std.mem.findScalarLast(u8, text[0..index], '\n')) |idx| idx + 1 else 0,
+        .end = std.mem.findScalarPos(u8, text, index, '\n') orelse text.len,
     };
 }
 
@@ -296,7 +296,7 @@ test lineSliceAtPosition {
 
 pub fn lineLocUntilIndex(text: []const u8, index: usize) Loc {
     return .{
-        .start = if (std.mem.lastIndexOfScalar(u8, text[0..index], '\n')) |idx| idx + 1 else 0,
+        .start = if (std.mem.findScalarLast(u8, text[0..index], '\n')) |idx| idx + 1 else 0,
         .end = index,
     };
 }