0aacccd8c9
`{s with ...}` is now `{..., ..s}`, which more clearly expresses that the
result type is not necessarily equal to the type of `s` (in absence of an
expected type and a structure name, we still default to the type of `s`).
Multiple fallback sources can be given: `{..., ..s, ..t}` will fall back to
searching a field in `s`, then in `t`. The last component can also be `..`,
which will replace any missing fields with a placeholder.
The old notation will be removed in the future.
87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
/*
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Copyright (c) 2016 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#include "kernel/instantiate.h"
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#include "library/placeholder.h"
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#include "library/explicit.h"
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#include "library/choice.h"
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#include "library/vm/vm.h"
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#include "library/vm/vm_expr.h"
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#include "library/vm/vm_name.h"
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#include "library/vm/vm_list.h"
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#include "library/vm/vm_option.h"
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#include "frontends/lean/util.h"
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#include "frontends/lean/structure_instance.h"
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namespace lean {
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vm_obj pexpr_of_expr(vm_obj const & e) {
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return to_obj(mk_as_is(to_expr(e)));
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}
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vm_obj pexpr_is_placeholder(vm_obj const & e) {
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return mk_vm_bool(is_placeholder(to_expr(e)));
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}
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vm_obj pexpr_mk_placeholder() {
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return to_obj(mk_expr_placeholder());
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}
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vm_obj pexpr_mk_explicit(vm_obj const & e) {
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return to_obj(mk_explicit(to_expr(e)));
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}
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vm_obj pexpr_mk_field_macro(vm_obj const & e, vm_obj const & fname) {
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return to_obj(mk_field_notation(to_expr(e), to_name(fname)));
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}
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vm_obj pexpr_is_choice_macro(vm_obj const & e) {
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return mk_vm_bool(is_choice(to_expr(e)));
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}
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vm_obj pexpr_mk_structure_instance(vm_obj const & info) {
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name struct_name;
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buffer<name> field_names;
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buffer<expr> field_values;
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buffer<expr> sources;
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if (!is_none(cfield(info, 0))) {
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struct_name = to_name(get_some_value(cfield(info, 0)));
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}
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to_buffer_name(cfield(info, 1), field_names);
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to_buffer_expr(cfield(info, 2), field_values);
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to_buffer_expr(cfield(info, 3), sources);
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return to_obj(mk_structure_instance(struct_name, field_names, field_values, sources));
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}
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vm_obj pexpr_get_structure_instance_info(vm_obj const & e) {
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if (!is_structure_instance(to_expr(e))) {
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return mk_vm_none();
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}
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auto info = get_structure_instance_info(to_expr(e));
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optional<name> opt_struct_name;
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if (info.m_struct_name) {
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opt_struct_name = info.m_struct_name;
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}
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return mk_vm_some(mk_vm_constructor(0, to_obj(opt_struct_name), to_obj(info.m_field_names),
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to_obj(info.m_field_values), to_obj(info.m_sources)));
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}
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void initialize_vm_pexpr() {
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DECLARE_VM_BUILTIN(name({"pexpr", "of_expr"}), pexpr_of_expr);
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DECLARE_VM_BUILTIN(name({"pexpr", "is_placeholder"}), pexpr_is_placeholder);
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DECLARE_VM_BUILTIN(name({"pexpr", "mk_placeholder"}), pexpr_mk_placeholder);
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DECLARE_VM_BUILTIN(name("pexpr", "mk_explicit"), pexpr_mk_explicit);
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DECLARE_VM_BUILTIN(name("pexpr", "mk_field_macro"), pexpr_mk_field_macro);
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DECLARE_VM_BUILTIN(name("pexpr", "is_choice_macro"), pexpr_is_choice_macro);
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DECLARE_VM_BUILTIN(name("pexpr", "mk_structure_instance"), pexpr_mk_structure_instance);
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DECLARE_VM_BUILTIN(name("pexpr", "get_structure_instance_info"), pexpr_get_structure_instance_info);
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}
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void finalize_vm_pexpr() {
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}
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}
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