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https://codeberg.org/ziglang/zig.git
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AstGen: allow locals with same name as primitives with @"" syntax
This makes local names follow the same rule as declaration names.
This commit is contained in:
Andrew Kelley
parent
f30aa25cbf
commit
6a6e2cd64f
3 changed files with 41 additions and 29 deletions
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@ -2385,7 +2385,7 @@ fn varDecl(
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}
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const ident_name = try astgen.identAsString(name_token);
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try astgen.detectLocalShadowing(scope, ident_name, name_token);
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try astgen.detectLocalShadowing(scope, ident_name, name_token, ident_name_raw);
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if (var_decl.ast.init_node == 0) {
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return astgen.failNode(node, "variables must be initialized", .{});
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@ -2952,12 +2952,13 @@ fn fnDecl(
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} else false;
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const param_name: u32 = if (param.name_token) |name_token| blk: {
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if (mem.eql(u8, "_", tree.tokenSlice(name_token)))
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const name_bytes = tree.tokenSlice(name_token);
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if (mem.eql(u8, "_", name_bytes))
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break :blk 0;
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const param_name = try astgen.identAsString(name_token);
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if (!is_extern) {
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try astgen.detectLocalShadowing(params_scope, param_name, name_token);
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try astgen.detectLocalShadowing(params_scope, param_name, name_token, name_bytes);
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}
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break :blk param_name;
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} else if (!is_extern) {
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@ -5035,7 +5036,7 @@ fn ifExpr(
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const token_name_str = tree.tokenSlice(token_name_index);
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if (mem.eql(u8, "_", token_name_str))
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break :s &then_scope.base;
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try astgen.detectLocalShadowing(&then_scope.base, ident_name, token_name_index);
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try astgen.detectLocalShadowing(&then_scope.base, ident_name, token_name_index, token_name_str);
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payload_val_scope = .{
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.parent = &then_scope.base,
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.gen_zir = &then_scope,
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@ -5054,11 +5055,12 @@ fn ifExpr(
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.optional_payload_unsafe_ptr
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else
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.optional_payload_unsafe;
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if (mem.eql(u8, "_", tree.tokenSlice(ident_token)))
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const ident_bytes = tree.tokenSlice(ident_token);
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if (mem.eql(u8, "_", ident_bytes))
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break :s &then_scope.base;
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const payload_inst = try then_scope.addUnNode(tag, cond.inst, node);
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const ident_name = try astgen.identAsString(ident_token);
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try astgen.detectLocalShadowing(&then_scope.base, ident_name, ident_token);
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try astgen.detectLocalShadowing(&then_scope.base, ident_name, ident_token, ident_bytes);
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payload_val_scope = .{
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.parent = &then_scope.base,
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.gen_zir = &then_scope,
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@ -5100,7 +5102,7 @@ fn ifExpr(
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const error_token_str = tree.tokenSlice(error_token);
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if (mem.eql(u8, "_", error_token_str))
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break :s &else_scope.base;
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try astgen.detectLocalShadowing(&else_scope.base, ident_name, error_token);
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try astgen.detectLocalShadowing(&else_scope.base, ident_name, error_token, error_token_str);
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payload_val_scope = .{
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.parent = &else_scope.base,
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.gen_zir = &else_scope,
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@ -5291,11 +5293,12 @@ fn whileExpr(
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.err_union_payload_unsafe;
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const payload_inst = try then_scope.addUnNode(tag, cond.inst, node);
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const ident_token = if (payload_is_ref) payload_token + 1 else payload_token;
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if (mem.eql(u8, "_", tree.tokenSlice(ident_token)))
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const ident_bytes = tree.tokenSlice(ident_token);
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if (mem.eql(u8, "_", ident_bytes))
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break :s &then_scope.base;
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const payload_name_loc = payload_token + @boolToInt(payload_is_ref);
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const ident_name = try astgen.identAsString(payload_name_loc);
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try astgen.detectLocalShadowing(&then_scope.base, ident_name, payload_name_loc);
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try astgen.detectLocalShadowing(&then_scope.base, ident_name, payload_name_loc, ident_bytes);
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payload_val_scope = .{
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.parent = &then_scope.base,
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.gen_zir = &then_scope,
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@ -5316,9 +5319,10 @@ fn whileExpr(
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.optional_payload_unsafe;
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const payload_inst = try then_scope.addUnNode(tag, cond.inst, node);
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const ident_name = try astgen.identAsString(ident_token);
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if (mem.eql(u8, "_", tree.tokenSlice(ident_token)))
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const ident_bytes = tree.tokenSlice(ident_token);
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if (mem.eql(u8, "_", ident_bytes))
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break :s &then_scope.base;
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try astgen.detectLocalShadowing(&then_scope.base, ident_name, ident_token);
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try astgen.detectLocalShadowing(&then_scope.base, ident_name, ident_token, ident_bytes);
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payload_val_scope = .{
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.parent = &then_scope.base,
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.gen_zir = &then_scope,
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@ -5374,9 +5378,10 @@ fn whileExpr(
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.err_union_code;
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const payload_inst = try else_scope.addUnNode(tag, cond.inst, node);
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const ident_name = try astgen.identAsString(error_token);
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if (mem.eql(u8, tree.tokenSlice(error_token), "_"))
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const ident_bytes = tree.tokenSlice(error_token);
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if (mem.eql(u8, ident_bytes, "_"))
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break :s &else_scope.base;
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try astgen.detectLocalShadowing(&else_scope.base, ident_name, error_token);
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try astgen.detectLocalShadowing(&else_scope.base, ident_name, error_token, ident_bytes);
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payload_val_scope = .{
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.parent = &else_scope.base,
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.gen_zir = &else_scope,
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@ -5523,7 +5528,7 @@ fn forExpr(
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const name_str_index = try astgen.identAsString(ident);
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const tag: Zir.Inst.Tag = if (is_ptr) .elem_ptr else .elem_val;
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const payload_inst = try then_scope.addBin(tag, array_ptr, index);
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try astgen.detectLocalShadowing(&then_scope.base, name_str_index, ident);
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try astgen.detectLocalShadowing(&then_scope.base, name_str_index, ident, value_name);
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payload_val_scope = .{
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.parent = &then_scope.base,
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.gen_zir = &then_scope,
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@ -5543,11 +5548,12 @@ fn forExpr(
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ident + 2
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else
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break :blk payload_sub_scope;
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if (mem.eql(u8, tree.tokenSlice(index_token), "_")) {
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const token_bytes = tree.tokenSlice(index_token);
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if (mem.eql(u8, token_bytes, "_")) {
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return astgen.failTok(index_token, "discard of index capture; omit it instead", .{});
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}
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const index_name = try astgen.identAsString(index_token);
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try astgen.detectLocalShadowing(payload_sub_scope, index_name, index_token);
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try astgen.detectLocalShadowing(payload_sub_scope, index_name, index_token, token_bytes);
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index_scope = .{
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.parent = payload_sub_scope,
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.gen_zir = &then_scope,
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@ -10059,7 +10065,7 @@ fn declareNewName(
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const ns = scope.cast(Scope.Namespace).?;
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const gop = try ns.decls.getOrPut(gpa, name_index);
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if (gop.found_existing) {
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const name = try gpa.dupe(u8, mem.spanZ(astgen.nullTerminatedString(name_index)));
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const name = try gpa.dupe(u8, mem.span(astgen.nullTerminatedString(name_index)));
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defer gpa.free(name);
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return astgen.failNodeNotes(node, "redeclaration of '{s}'", .{
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name,
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@ -10094,13 +10100,17 @@ fn detectLocalShadowing(
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scope: *Scope,
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ident_name: u32,
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name_token: ast.TokenIndex,
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token_bytes: []const u8,
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) !void {
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const gpa = astgen.gpa;
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const name_slice = mem.spanZ(astgen.nullTerminatedString(ident_name));
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if (isPrimitive(name_slice)) {
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const name = try gpa.dupe(u8, name_slice);
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defer gpa.free(name);
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return astgen.failTok(name_token, "local shadows primitive '{s}'", .{name});
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if (token_bytes[0] != '@' and isPrimitive(token_bytes)) {
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return astgen.failTokNotes(name_token, "name shadows primitive '{s}'", .{
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token_bytes,
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}, &[_]u32{
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try astgen.errNoteTok(name_token, "consider using @\"{s}\" to disambiguate", .{
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token_bytes,
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}),
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});
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}
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var s = scope;
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@ -10108,6 +10118,7 @@ fn detectLocalShadowing(
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.local_val => {
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const local_val = s.cast(Scope.LocalVal).?;
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if (local_val.name == ident_name) {
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const name_slice = mem.span(astgen.nullTerminatedString(ident_name));
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const name = try gpa.dupe(u8, name_slice);
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defer gpa.free(name);
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return astgen.failTokNotes(name_token, "redeclaration of {s} '{s}'", .{
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@ -10125,6 +10136,7 @@ fn detectLocalShadowing(
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.local_ptr => {
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const local_ptr = s.cast(Scope.LocalPtr).?;
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if (local_ptr.name == ident_name) {
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const name_slice = mem.span(astgen.nullTerminatedString(ident_name));
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const name = try gpa.dupe(u8, name_slice);
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defer gpa.free(name);
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return astgen.failTokNotes(name_token, "redeclaration of {s} '{s}'", .{
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@ -10145,6 +10157,7 @@ fn detectLocalShadowing(
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s = ns.parent;
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continue;
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};
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const name_slice = mem.span(astgen.nullTerminatedString(ident_name));
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const name = try gpa.dupe(u8, name_slice);
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defer gpa.free(name);
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return astgen.failTokNotes(name_token, "local shadows declaration of '{s}'", .{
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@ -533,4 +533,8 @@ test "use of declaration with same name as primitive" {
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const b: S.alias = 300;
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try expect(b == 300);
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const @"u8" = u16;
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const c: @"u8" = 300;
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try expect(c == 300);
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}
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@ -7264,14 +7264,9 @@ pub fn addCases(ctx: *TestContext) !void {
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\\ const a: u8 = 300;
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\\ _ = a;
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\\}
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\\export fn bar() void {
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\\ const @"u8" = u16;
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\\ const a: @"u8" = 300;
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\\ _ = a;
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\\}
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, &[_][]const u8{
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"tmp.zig:2:11: error: local shadows primitive 'u8'",
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"tmp.zig:7:11: error: local shadows primitive 'u8'",
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"tmp.zig:2:11: error: name shadows primitive 'u8'",
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"tmp.zig:2:11: note: consider using @\"u8\" to disambiguate",
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});
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ctx.objErrStage1("primitives take precedence over declarations",
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