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zig fmt: canonicalize nested cast builtin order

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Justus Klausecker 2025-08-03 14:53:33 +02:00
parent a5f891d0b3
commit 81219493f8
1 changed files with 42 additions and 1 deletions
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43
lib/std/zig/Ast/Render.zig
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@ -783,7 +783,48 @@ fn renderExpression(r: *Render, node: Ast.Node.Index, space: Space) Error!void {
=> {
var buf: [2]Ast.Node.Index = undefined;
const params = tree.builtinCallParams(&buf, node).?;
return renderBuiltinCall(r, tree.nodeMainToken(node), params, space);
var builtin_token = tree.nodeMainToken(node);
canonicalize: {
if (params.len != 1) break :canonicalize;
const CastKind = enum {
ptrCast,
alignCast,
addrSpaceCast,
constCast,
volatileCast,
};
const kind = meta.stringToEnum(CastKind, tree.tokenSlice(builtin_token)[1..]) orelse break :canonicalize;
var cast_map = std.EnumMap(CastKind, Ast.TokenIndex).init(.{});
cast_map.put(kind, builtin_token);
var casts_before: usize = 0;
if (builtin_token >= 2) {
var prev_builtin_token = builtin_token - 2;
while (tree.tokenTag(prev_builtin_token) == .builtin) : (prev_builtin_token -= 2) {
const prev_kind = meta.stringToEnum(CastKind, tree.tokenSlice(prev_builtin_token)[1..]) orelse break;
if (cast_map.contains(prev_kind)) break :canonicalize;
cast_map.put(prev_kind, prev_builtin_token);
casts_before += 1;
}
}
var next_builtin_token = builtin_token + 2;
while (tree.tokenTag(next_builtin_token) == .builtin) : (next_builtin_token += 2) {
const next_kind = meta.stringToEnum(CastKind, tree.tokenSlice(next_builtin_token)[1..]) orelse break;
if (cast_map.contains(next_kind)) break :canonicalize;
cast_map.put(next_kind, next_builtin_token);
}
var it = cast_map.iterator();
builtin_token = it.next().?.value.*;
while (casts_before > 0) : (casts_before -= 1) {
builtin_token = it.next().?.value.*;
}
}
return renderBuiltinCall(r, builtin_token, params, space);
},
.fn_proto_simple,