std: use std.ArrayList(u8) instead of std.Buffer in src-self-hosted/translate_c.zig

Author: daurnimator

src-self-hosted/translate_c.zig

@@ -209,7 +209,7 @@ const Scope = struct {
 
 pub const Context = struct {
     tree: *ast.Tree,
-    source_buffer: *std.Buffer,
+    source_buffer: *std.ArrayList(u8),
     err: Error,
     source_manager: *ZigClangSourceManager,
     decl_table: DeclTable,
@@ -296,7 +296,8 @@ pub fn translate(
         .eof_token = undefined,
     };
 
-    var source_buffer = try std.Buffer.initSize(arena, 0);
+    var source_buffer = std.ArrayList(u8).init(arena);
+    errdefer source_buffer.deinit();
 
     var context = Context{
         .tree = tree,
@@ -4291,7 +4292,7 @@ fn makeRestorePoint(c: *Context) RestorePoint {
     return RestorePoint{
         .c = c,
         .token_index = c.tree.tokens.len,
-        .src_buf_index = c.source_buffer.len(),
+        .src_buf_index = c.source_buffer.len,
     };
 }
 
@@ -4754,14 +4755,14 @@ fn appendToken(c: *Context, token_id: Token.Id, bytes: []const u8) !ast.TokenInd
 fn appendTokenFmt(c: *Context, token_id: Token.Id, comptime format: []const u8, args: var) !ast.TokenIndex {
     const S = struct {
         fn callback(context: *Context, bytes: []const u8) error{OutOfMemory}!void {
-            return context.source_buffer.append(bytes);
+            return context.source_buffer.appendSlice(bytes);
         }
     };
-    const start_index = c.source_buffer.len();
+    const start_index = c.source_buffer.len;
     errdefer c.source_buffer.shrink(start_index);
 
     try std.fmt.format(c, error{OutOfMemory}, S.callback, format, args);
-    const end_index = c.source_buffer.len();
+    const end_index = c.source_buffer.len;
     const token_index = c.tree.tokens.len;
     const new_token = try c.tree.tokens.addOne();
     errdefer c.tree.tokens.shrink(token_index);
@@ -4771,7 +4772,7 @@ fn appendTokenFmt(c: *Context, token_id: Token.Id, comptime format: []const u8,
         .start = start_index,
         .end = end_index,
     };
-    try c.source_buffer.appendByte(' ');
+    try c.source_buffer.append(' ');
 
     return token_index;
 }
@@ -5789,7 +5790,7 @@ fn parseCPrefixOpExpr(c: *Context, it: *CTokenList.Iterator, source: []const u8,
 
 fn tokenSlice(c: *Context, token: ast.TokenIndex) []u8 {
     const tok = c.tree.tokens.at(token);
-    const slice = c.source_buffer.toSlice()[tok.start..tok.end];
+    const slice = c.source_buffer.span()[tok.start..tok.end];
     return if (mem.startsWith(u8, slice, "@\""))
         slice[2 .. slice.len - 1]
     else