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using x in bar;

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This commit is contained in:
gingerBill
2017-12-17 11:44:26 +00:00
parent 0d665c637f
commit 32a502d14e
4 changed files with 175 additions and 10 deletions
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src/check_stmt.cpp
+150 -6
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@@ -522,27 +522,25 @@ bool check_using_stmt_entity(Checker *c, AstNodeUsingStmt *us, AstNode *expr, bo
case Entity_Variable: {
Type *t = base_type(type_deref(e->type));
if (is_type_struct(t) || is_type_raw_union(t) || is_type_union(t)) {
if (t->kind == Type_Struct) {
// TODO(bill): Make it work for unions too
Scope *found = scope_of_node(&c->info, t->Struct.node);
for_array(i, found->elements.entries) {
Entity *f = found->elements.entries[i].value;
if (f->kind == Entity_Variable) {
Entity *uvar = make_entity_using_variable(c->allocator, e, f->token, f->type);
// if (is_selector) {
uvar->using_expr = expr;
// }
uvar->using_expr = expr;
Entity *prev = scope_insert_entity(c->context.scope, uvar);
if (prev != nullptr) {
gbString expr_str = expr_to_string(expr);
error(us->token, "Namespace collision while 'using' '%s' of: %.*s", expr_str, LIT(prev->token.string));
error(us->token, "Namespace collision while using '%s' of: '%.*s'", expr_str, LIT(prev->token.string));
gb_string_free(expr_str);
return false;
}
}
}
} else {
error(us->token, "'using' can only be applied to variables of type `struct`");
error(us->token, "'using' can only be applied to variables of type 'struct'");
return false;
}
@@ -554,6 +552,7 @@ bool check_using_stmt_entity(Checker *c, AstNodeUsingStmt *us, AstNode *expr, bo
break;
case Entity_Procedure:
case Entity_ProcGroup:
case Entity_Builtin:
error(us->token, "'using' cannot be applied to a procedure");
break;
@@ -1646,6 +1645,151 @@ void check_stmt_internal(Checker *c, AstNode *node, u32 flags) {
}
case_end;
case_ast_node(uis, UsingInStmt, node);
if (uis->list.count == 0) {
error(node, "Empty 'using' list");
return;
}
AstNode *expr = uis->expr;
Entity *e = nullptr;
Operand o = {};
if (expr->kind == AstNode_Ident) {
e = check_ident(c, &o, expr, nullptr, nullptr, true);
} else if (expr->kind == AstNode_SelectorExpr) {
e = check_selector(c, &o, expr, nullptr);
}
if (e == nullptr) {
error(expr, "'using' applied to an unknown entity");
return;
}
add_entity_use(c, expr, e);
switch (e->kind) {
case Entity_TypeName: {
Type *t = base_type(e->type);
if (t->kind == Type_Enum) {
GB_ASSERT(t->Enum.scope != nullptr);
for_array(list_index, uis->list) {
AstNode *node = uis->list[list_index];
ast_node(ident, Ident, node);
String name = ident->token.string;
Entity *f = scope_lookup_entity(t->Enum.scope, name);
if (f == nullptr || !is_entity_exported(f)) {
if (is_blank_ident(name)) {
error(node, "'_' cannot be used as a value");
} else {
error(node, "Undeclared name in this enumeration: '%.*s'", LIT(name));
}
continue;
}
add_entity_use(c, node, f);
add_entity(c, c->context.scope, node, f);
}
} else {
error(node, "'using' can be only applied to enum type entities");
}
break;
}
case Entity_ImportName: {
Scope *scope = e->ImportName.scope;
for_array(list_index, uis->list) {
AstNode *node = uis->list[list_index];
ast_node(ident, Ident, node);
String name = ident->token.string;
Entity *f = scope_lookup_entity(scope, name);
if (f == nullptr) {
if (is_blank_ident(name)) {
error(node, "'_' cannot be used as a value");
} else {
error(node, "Undeclared name in this import name: '%.*s'", LIT(name));
}
continue;
}
bool implicit_is_found = ptr_set_exists(&scope->implicit, f);
if (is_entity_exported(f) && !implicit_is_found) {
add_entity_use(c, node, f);
add_entity(c, c->context.scope, node, f);
} else {
error(node, "'%.*s' is exported from '%.*s'", LIT(f->token.string), LIT(e->token.string));
continue;
}
}
break;
}
case Entity_Variable: {
Type *t = base_type(type_deref(e->type));
if (t->kind == Type_Struct) {
// TODO(bill): Make it work for unions too
Scope *found = scope_of_node(&c->info, t->Struct.node);
for_array(list_index, uis->list) {
AstNode *node = uis->list[list_index];
ast_node(ident, Ident, node);
String name = ident->token.string;
Entity *f = scope_lookup_entity(found, name);
if (f == nullptr || f->kind != Entity_Variable) {
if (is_blank_ident(name)) {
error(node, "'_' cannot be used as a value");
} else {
error(node, "Undeclared name in this variable: '%.*s'", LIT(name));
}
continue;
}
Entity *uvar = make_entity_using_variable(c->allocator, e, f->token, f->type);
uvar->using_expr = expr;
Entity *prev = scope_insert_entity(c->context.scope, uvar);
if (prev != nullptr) {
gbString expr_str = expr_to_string(expr);
error(node, "Namespace collision while using '%s' of: '%.*s'", expr_str, LIT(prev->token.string));
gb_string_free(expr_str);
continue;
}
}
} else {
error(node, "'using' can only be applied to variables of type `struct`");
return;
}
break;
}
case Entity_Constant:
error(node, "'using' cannot be applied to a constant");
break;
case Entity_Procedure:
case Entity_ProcGroup:
case Entity_Builtin:
error(node, "'using' cannot be applied to a procedure");
break;
case Entity_Nil:
error(node, "'using' cannot be applied to 'nil'");
break;
case Entity_Label:
error(node, "'using' cannot be applied to a label");
break;
case Entity_Invalid:
error(node, "'using' cannot be applied to an invalid entity");
break;
default:
GB_PANIC("TODO(bill): 'using' other expressions?");
}
case_end;
case_ast_node(pa, PushContext, node);