1025 lines
40 KiB
Zig
1025 lines
40 KiB
Zig
//! Hacky comptime interpreter, courtesy of midnight code run fuelled by spite;
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//! hope that one day this can use async... <33
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// TODO: DODify
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const std = @import("std");
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const builtin = @import("builtin");
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const ast = @import("ast.zig");
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const zig = std.zig;
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const Ast = zig.Ast;
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const analysis = @import("analysis.zig");
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const offsets = @import("offsets.zig");
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const DocumentStore = @import("DocumentStore.zig");
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pub const InternPool = @import("InternPool.zig");
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pub const IPIndex = InternPool.Index;
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pub const IPKey = InternPool.Key;
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pub const ComptimeInterpreter = @This();
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const log = std.log.scoped(.comptime_interpreter);
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allocator: std.mem.Allocator,
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ip: InternPool = .{},
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document_store: *DocumentStore,
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uri: DocumentStore.Uri,
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decls: std.ArrayListUnmanaged(Decl) = .{},
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namespaces: std.MultiArrayList(Namespace) = .{},
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/// Interpreter diagnostic errors
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errors: std.AutoArrayHashMapUnmanaged(Ast.Node.Index, InterpreterError) = .{},
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pub fn getHandle(interpreter: *ComptimeInterpreter) *const DocumentStore.Handle {
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// This interpreter is loaded from a known-valid handle so a valid handle must exist
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return interpreter.document_store.getOrLoadHandle(interpreter.uri).?;
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}
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pub const InterpreterError = struct {
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code: []const u8,
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message: []const u8,
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};
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/// `message` must be allocated with interpreter allocator
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pub fn recordError(
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interpreter: *ComptimeInterpreter,
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node_idx: Ast.Node.Index,
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code: []const u8,
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comptime fmt: []const u8,
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args: anytype,
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) error{OutOfMemory}!void {
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try interpreter.errors.put(interpreter.allocator, node_idx, .{
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.code = code,
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.message = try std.fmt.allocPrint(interpreter.allocator, fmt, args),
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});
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}
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pub fn deinit(interpreter: *ComptimeInterpreter) void {
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var err_it = interpreter.errors.iterator();
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while (err_it.next()) |entry| interpreter.allocator.free(entry.value_ptr.message);
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interpreter.errors.deinit(interpreter.allocator);
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interpreter.ip.deinit(interpreter.allocator);
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var i: usize = 0;
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while (i < interpreter.namespaces.len) : (i += 1) {
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interpreter.namespaces.items(.decls)[i].deinit(interpreter.allocator);
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interpreter.namespaces.items(.usingnamespaces)[i].deinit(interpreter.allocator);
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}
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interpreter.namespaces.deinit(interpreter.allocator);
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interpreter.decls.deinit(interpreter.allocator);
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}
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pub const Type = struct {
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interpreter: *ComptimeInterpreter,
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node_idx: Ast.Node.Index,
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ty: IPIndex,
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};
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pub const Value = struct {
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interpreter: *ComptimeInterpreter,
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node_idx: Ast.Node.Index,
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ty: IPIndex,
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val: IPIndex,
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};
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pub const Decl = struct {
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name: []const u8,
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ty: IPIndex,
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val: IPIndex,
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alignment: u16,
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address_space: std.builtin.AddressSpace,
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is_pub: bool,
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is_exported: bool,
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};
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// pub const Comptimeness = enum { @"comptime", runtime };
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pub const NamespaceIndex = InternPool.NamespaceIndex;
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pub const Namespace = struct {
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/// always points to Namespace or Index.none
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parent: NamespaceIndex,
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node_idx: Ast.Node.Index,
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/// Will be a struct, enum, union, opaque or .none
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ty: IPIndex,
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decls: std.StringArrayHashMapUnmanaged(Decl) = .{},
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usingnamespaces: std.ArrayListUnmanaged(NamespaceIndex) = .{},
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// TODO: Actually use this value
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// comptimeness: Comptimeness,
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pub fn getLabel(self: Namespace, tree: Ast) ?Ast.TokenIndex {
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const token_tags = tree.tokens.items(.tag);
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switch (tree.nodes.items(.tag)[self.node_idx]) {
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.block_two,
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.block_two_semicolon,
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.block,
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.block_semicolon,
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=> {
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const lbrace = tree.nodes.items(.main_token)[self.node_idx];
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if (token_tags[lbrace - 1] == .colon and token_tags[lbrace - 2] == .identifier) {
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return lbrace - 2;
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}
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return null;
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},
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else => return null,
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}
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}
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};
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pub const InterpretResult = union(enum) {
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@"break": ?[]const u8,
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break_with_value: struct {
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label: ?[]const u8,
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value: Value,
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},
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value: Value,
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@"return",
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return_with_value: Value,
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nothing,
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pub fn maybeGetValue(result: InterpretResult) ?Value {
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return switch (result) {
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.break_with_value => |v| v.value,
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.value => |v| v,
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.return_with_value => |v| v,
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else => null,
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};
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}
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pub fn getValue(result: InterpretResult) error{ExpectedValue}!Value {
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return result.maybeGetValue() orelse error.ExpectedValue;
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}
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};
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pub fn huntItDown(
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interpreter: *ComptimeInterpreter,
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namespace: NamespaceIndex,
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decl_name: []const u8,
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options: InterpretOptions,
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) error{IdentifierNotFound}!Decl {
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_ = options;
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var current_namespace = namespace;
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while (current_namespace != .none) {
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const decls: std.StringArrayHashMapUnmanaged(Decl) = interpreter.namespaces.items(.decls)[@enumToInt(current_namespace)];
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defer current_namespace = interpreter.namespaces.items(.parent)[@enumToInt(current_namespace)];
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if (decls.get(decl_name)) |decl| {
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return decl;
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}
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}
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return error.IdentifierNotFound;
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}
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// Might be useful in the future
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pub const InterpretOptions = struct {};
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pub const InterpretError = std.mem.Allocator.Error || std.fmt.ParseIntError || std.fmt.ParseFloatError || error{
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InvalidCharacter,
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InvalidBase,
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ExpectedValue,
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InvalidOperation,
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CriticalAstFailure,
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InvalidBuiltin,
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IdentifierNotFound,
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MissingArguments,
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ImportFailure,
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InvalidCast,
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};
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pub fn interpret(
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interpreter: *ComptimeInterpreter,
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node_idx: Ast.Node.Index,
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namespace: NamespaceIndex,
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options: InterpretOptions,
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) InterpretError!InterpretResult {
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const tree = interpreter.getHandle().tree;
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const tags = tree.nodes.items(.tag);
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const data = tree.nodes.items(.data);
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const main_tokens = tree.nodes.items(.main_token);
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switch (tags[node_idx]) {
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.container_decl,
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.container_decl_trailing,
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.container_decl_arg,
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.container_decl_arg_trailing,
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.container_decl_two,
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.container_decl_two_trailing,
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// .tagged_union, // TODO: Fix these
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// .tagged_union_trailing,
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// .tagged_union_two,
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// .tagged_union_two_trailing,
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// .tagged_union_enum_tag,
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// .tagged_union_enum_tag_trailing,
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.root,
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=> {
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const type_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type });
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try interpreter.namespaces.append(interpreter.allocator, .{
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.parent = namespace,
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.node_idx = node_idx,
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.ty = undefined,
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});
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const container_namespace = @intToEnum(NamespaceIndex, interpreter.namespaces.len - 1);
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var fields = std.ArrayListUnmanaged(InternPool.Struct.Field){};
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defer fields.deinit(interpreter.allocator);
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var buffer: [2]Ast.Node.Index = undefined;
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const members = ast.declMembers(tree, node_idx, &buffer);
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for (members) |member| {
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const container_field = ast.containerField(tree, member) orelse {
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_ = try interpreter.interpret(member, container_namespace, options);
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continue;
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};
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var init_type_value = try (try interpreter.interpret(container_field.ast.type_expr, container_namespace, .{})).getValue();
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var default_value = if (container_field.ast.value_expr == 0)
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IPIndex.none
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else
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(try (try interpreter.interpret(container_field.ast.value_expr, container_namespace, .{})).getValue()).val; // TODO check ty
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if (init_type_value.ty != type_type) {
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try interpreter.recordError(
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container_field.ast.type_expr,
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"expected_type",
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"expected type 'type', found '{}'",
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.{init_type_value.ty.fmtType(interpreter.ip)},
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);
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continue;
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}
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const field: InternPool.Struct.Field = .{
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.name = tree.tokenSlice(container_field.ast.main_token),
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.ty = init_type_value.val,
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.default_value = default_value,
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.alignment = 0, // TODO,
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.is_comptime = false, // TODO
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};
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try fields.append(interpreter.allocator, field);
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}
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const struct_type = try interpreter.ip.get(interpreter.allocator, IPKey{
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.struct_type = .{
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.fields = fields.items,
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.namespace = namespace,
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.layout = .Auto, // TODO
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.backing_int_ty = .none, // TODO
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},
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});
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interpreter.namespaces.items(.ty)[@enumToInt(container_namespace)] = struct_type;
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return InterpretResult{ .value = Value{
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.interpreter = interpreter,
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.node_idx = node_idx,
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.ty = type_type,
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.val = struct_type,
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} };
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},
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.error_set_decl => {
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// TODO
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return InterpretResult{ .nothing = {} };
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},
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.global_var_decl,
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.local_var_decl,
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.aligned_var_decl,
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.simple_var_decl,
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=> {
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var decls = &interpreter.namespaces.items(.decls)[@enumToInt(namespace)];
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const name = analysis.getDeclName(tree, node_idx).?;
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if (decls.contains(name))
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return InterpretResult{ .nothing = {} };
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const decl = ast.varDecl(tree, node_idx).?;
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if (decl.ast.init_node == 0)
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return InterpretResult{ .nothing = {} };
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const init_type_value = try ((try interpreter.interpret(decl.ast.init_node, namespace, .{})).getValue());
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try decls.putNoClobber(interpreter.allocator, name, .{
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.name = name,
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.ty = init_type_value.ty,
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.val = init_type_value.val,
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.alignment = 0, // TODO
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.address_space = .generic, // TODO
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.is_pub = true, // TODO
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.is_exported = false, // TODO
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});
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// TODO: Am I a dumbo shrimp? (e.g. is this tree shaking correct? works on my machine so like...)
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// if (scope.?.scopeKind() != .container) {
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// if (scope.?.node_idx != 0)
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// _ = try decls.getPtr(name).?.getValue();
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return InterpretResult{ .nothing = {} };
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},
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.block,
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.block_semicolon,
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.block_two,
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.block_two_semicolon,
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=> {
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try interpreter.namespaces.append(interpreter.allocator, .{
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.parent = namespace,
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.node_idx = node_idx,
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.ty = .none,
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});
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const block_namespace = @intToEnum(NamespaceIndex, interpreter.namespaces.len - 1);
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var buffer: [2]Ast.Node.Index = undefined;
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const statements = ast.blockStatements(tree, node_idx, &buffer).?;
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for (statements) |idx| {
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const ret = try interpreter.interpret(idx, block_namespace, options);
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switch (ret) {
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.@"break" => |lllll| {
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const maybe_block_label_string = if (interpreter.namespaces.get(@enumToInt(namespace)).getLabel(tree)) |i| tree.tokenSlice(i) else null;
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if (lllll) |l| {
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if (maybe_block_label_string) |ls| {
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if (std.mem.eql(u8, l, ls)) {
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return InterpretResult{ .nothing = {} };
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} else return ret;
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} else return ret;
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} else {
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return InterpretResult{ .nothing = {} };
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}
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},
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.break_with_value => |bwv| {
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const maybe_block_label_string = if (interpreter.namespaces.get(@enumToInt(namespace)).getLabel(tree)) |i| tree.tokenSlice(i) else null;
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if (bwv.label) |l| {
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if (maybe_block_label_string) |ls| {
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if (std.mem.eql(u8, l, ls)) {
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return InterpretResult{ .value = bwv.value };
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} else return ret;
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} else return ret;
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} else {
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return InterpretResult{ .value = bwv.value };
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}
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},
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.@"return", .return_with_value => return ret,
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else => {},
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}
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}
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return InterpretResult{ .nothing = {} };
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},
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.identifier => {
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const value = offsets.nodeToSlice(tree, node_idx);
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const simples = std.ComptimeStringMap(InternPool.Simple, .{
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.{ "anyerror", .anyerror },
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.{ "anyframe", .@"anyframe" },
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.{ "anyopaque", .anyopaque },
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.{ "bool", .bool },
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.{ "c_int", .c_int },
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.{ "c_long", .c_long },
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.{ "c_longdouble", .c_longdouble },
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.{ "c_longlong", .c_longlong },
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.{ "c_short", .c_short },
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.{ "c_uint", .c_uint },
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.{ "c_ulong", .c_ulong },
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.{ "c_ulonglong", .c_ulonglong },
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.{ "c_ushort", .c_ushort },
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.{ "comptime_float", .comptime_float },
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.{ "comptime_int", .comptime_int },
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.{ "f128", .f128 },
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.{ "f16", .f16 },
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.{ "f32", .f32 },
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.{ "f64", .f64 },
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.{ "f80", .f80 },
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.{ "false", .bool_false },
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.{ "isize", .isize },
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.{ "noreturn", .noreturn },
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.{ "null", .null_value },
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.{ "true", .bool_true },
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.{ "type", .type },
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.{ "undefined", .undefined_value },
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.{ "usize", .usize },
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.{ "void", .void },
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});
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if (simples.get(value)) |simple| {
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return InterpretResult{ .value = Value{
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.interpreter = interpreter,
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.node_idx = node_idx,
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.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = simple.toType() }),
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.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = simple }),
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} };
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}
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if (value.len >= 2 and (value[0] == 'u' or value[0] == 'i')) blk: {
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return InterpretResult{ .value = Value{
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.interpreter = interpreter,
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.node_idx = node_idx,
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.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type }),
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.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .int_type = .{
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.signedness = if (value[0] == 'u') .unsigned else .signed,
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.bits = std.fmt.parseInt(u16, value[1..], 10) catch break :blk,
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} }),
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} };
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}
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// Logic to find identifiers in accessible scopes
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const decl = interpreter.huntItDown(namespace, value, options) catch |err| switch (err) {
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error.IdentifierNotFound => |e| {
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try interpreter.recordError(
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node_idx,
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"undeclared_identifier",
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"use of undeclared identifier '{s}'",
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.{value},
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);
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return e;
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},
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};
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return InterpretResult{ .value = Value{
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.interpreter = interpreter,
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.node_idx = node_idx,
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.ty = decl.ty,
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.val = decl.val,
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} };
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},
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.field_access => {
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if (data[node_idx].rhs == 0) return error.CriticalAstFailure;
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const rhs_str = tree.tokenSlice(data[node_idx].rhs);
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var ir = try interpreter.interpret(data[node_idx].lhs, namespace, options);
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var irv = try ir.getValue();
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const lhs_namespace = interpreter.ip.indexToKey(irv.val).getNamespace();
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var scope_sub_decl = irv.interpreter.huntItDown(lhs_namespace, rhs_str, options) catch |err| switch (err) {
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error.IdentifierNotFound => |e| {
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try interpreter.recordError(
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node_idx,
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"undeclared_identifier",
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"`{}` has no member '{s}'",
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.{ irv.ty.fmtType(interpreter.ip), rhs_str },
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);
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return e;
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},
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};
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return InterpretResult{ .value = Value{
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.interpreter = interpreter,
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.node_idx = data[node_idx].rhs,
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.ty = scope_sub_decl.ty,
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.val = scope_sub_decl.val,
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} };
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},
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.grouped_expression => {
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return try interpreter.interpret(data[node_idx].lhs, namespace, options);
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},
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.@"break" => {
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const label = if (data[node_idx].lhs == 0) null else tree.tokenSlice(data[node_idx].lhs);
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return if (data[node_idx].rhs == 0)
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InterpretResult{ .@"break" = label }
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else
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InterpretResult{ .break_with_value = .{ .label = label, .value = try (try interpreter.interpret(data[node_idx].rhs, namespace, options)).getValue() } };
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},
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.@"return" => {
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return if (data[node_idx].lhs == 0)
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InterpretResult{ .@"return" = {} }
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else
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InterpretResult{ .return_with_value = try (try interpreter.interpret(data[node_idx].lhs, namespace, options)).getValue() };
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},
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.@"if",
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.if_simple,
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=> {
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const if_info = ast.ifFull(tree, node_idx);
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// TODO: Don't evaluate runtime ifs
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|
// if (options.observe_values) {
|
|
const ir = try interpreter.interpret(if_info.ast.cond_expr, namespace, options);
|
|
|
|
const false_value = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .bool_false });
|
|
const true_value = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .bool_true });
|
|
|
|
const condition = (try ir.getValue()).val;
|
|
std.debug.assert(condition == false_value or condition == true_value);
|
|
if (condition == true_value) {
|
|
return try interpreter.interpret(if_info.ast.then_expr, namespace, options);
|
|
} else {
|
|
if (if_info.ast.else_expr != 0) {
|
|
return try interpreter.interpret(if_info.ast.else_expr, namespace, options);
|
|
} else return InterpretResult{ .nothing = {} };
|
|
}
|
|
},
|
|
.equal_equal => {
|
|
var a = try interpreter.interpret(data[node_idx].lhs, namespace, options);
|
|
var b = try interpreter.interpret(data[node_idx].rhs, namespace, options);
|
|
return InterpretResult{
|
|
.value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .bool }),
|
|
.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = if (a.value.val == b.value.val) .bool_true else .bool_false }), // TODO eql function required?
|
|
},
|
|
};
|
|
},
|
|
.number_literal => {
|
|
const s = tree.getNodeSource(node_idx);
|
|
const nl = std.zig.parseNumberLiteral(s);
|
|
|
|
if (nl == .failure) return error.CriticalAstFailure;
|
|
|
|
const number_type = try interpreter.ip.get(interpreter.allocator, IPKey{
|
|
.simple = if (nl == .float) .comptime_float else .comptime_int,
|
|
});
|
|
|
|
const value = try interpreter.ip.get(
|
|
interpreter.allocator,
|
|
switch (nl) {
|
|
.float => IPKey{
|
|
.float_128_value = try std.fmt.parseFloat(f128, s),
|
|
},
|
|
.int => if (s[0] == '-') IPKey{
|
|
.int_i64_value = try std.fmt.parseInt(i64, s, 0),
|
|
} else IPKey{
|
|
.int_u64_value = try std.fmt.parseInt(u64, s, 0),
|
|
},
|
|
.big_int => @panic("TODO: implement big int"),
|
|
.failure => return error.CriticalAstFailure,
|
|
},
|
|
);
|
|
|
|
return InterpretResult{ .value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = number_type,
|
|
.val = value,
|
|
} };
|
|
},
|
|
.assign,
|
|
.assign_bit_and,
|
|
.assign_bit_or,
|
|
.assign_shl,
|
|
.assign_shr,
|
|
.assign_bit_xor,
|
|
.assign_div,
|
|
.assign_sub,
|
|
.assign_sub_wrap,
|
|
.assign_mod,
|
|
.assign_add,
|
|
.assign_add_wrap,
|
|
.assign_mul,
|
|
.assign_mul_wrap,
|
|
=> {
|
|
// TODO: Actually consider operators
|
|
|
|
if (std.mem.eql(u8, tree.getNodeSource(data[node_idx].lhs), "_")) {
|
|
_ = try interpreter.interpret(data[node_idx].rhs, namespace, options);
|
|
return InterpretResult{ .nothing = {} };
|
|
}
|
|
|
|
var ir = try interpreter.interpret(data[node_idx].lhs, namespace, options);
|
|
var to_value = try ir.getValue();
|
|
var from_value = (try (try interpreter.interpret(data[node_idx].rhs, namespace, options)).getValue());
|
|
|
|
// TODO report error
|
|
_ = try interpreter.ip.cast(interpreter.allocator, to_value.ty, from_value.ty, builtin.target);
|
|
|
|
return InterpretResult{ .nothing = {} };
|
|
},
|
|
// .@"switch",
|
|
// .switch_comma,
|
|
// => {
|
|
// const cond = data[node_idx].lhs;
|
|
// const extra = tree.extraData(data[node_idx].rhs, Ast.Node.SubRange);
|
|
// const cases = tree.extra_data[extra.start..extra.end];
|
|
|
|
// for (cases) |case| {
|
|
// const switch_case: Ast.full.SwitchCase = switch (tags[case]) {
|
|
// .switch_case => tree.switchCase(case),
|
|
// .switch_case_one => tree.switchCaseOne(case),
|
|
// else => continue,
|
|
// };
|
|
// }
|
|
// },
|
|
.builtin_call,
|
|
.builtin_call_comma,
|
|
.builtin_call_two,
|
|
.builtin_call_two_comma,
|
|
=> {
|
|
var buffer: [2]Ast.Node.Index = undefined;
|
|
const params = ast.builtinCallParams(tree, node_idx, &buffer).?;
|
|
const call_name = tree.tokenSlice(main_tokens[node_idx]);
|
|
|
|
if (std.mem.eql(u8, call_name, "@compileLog")) {
|
|
var final = std.ArrayList(u8).init(interpreter.allocator);
|
|
var writer = final.writer();
|
|
try writer.writeAll("log: ");
|
|
|
|
for (params) |param, index| {
|
|
var value = (try interpreter.interpret(param, namespace, options)).maybeGetValue() orelse {
|
|
try writer.writeAll("indeterminate");
|
|
continue;
|
|
};
|
|
try writer.print("@as({}, {})", .{ value.ty.fmtType(interpreter.ip), value.val.fmtValue(value.ty, interpreter.ip) });
|
|
if (index != params.len - 1)
|
|
try writer.writeAll(", ");
|
|
}
|
|
try interpreter.recordError(node_idx, "compile_log", "{s}", .{try final.toOwnedSlice()});
|
|
|
|
return InterpretResult{ .nothing = {} };
|
|
}
|
|
|
|
if (std.mem.eql(u8, call_name, "@compileError")) {
|
|
if (params.len != 0) return error.InvalidBuiltin;
|
|
const message = offsets.nodeToSlice(tree, params[0]);
|
|
try interpreter.recordError(node_idx, "compile_error", "{s}", .{message});
|
|
return InterpretResult{ .@"return" = {} };
|
|
}
|
|
|
|
if (std.mem.eql(u8, call_name, "@import")) {
|
|
if (params.len == 0) return error.InvalidBuiltin;
|
|
const import_param = params[0];
|
|
if (tags[import_param] != .string_literal) return error.InvalidBuiltin;
|
|
|
|
const import_str = tree.tokenSlice(main_tokens[import_param]);
|
|
|
|
log.info("Resolving {s} from {s}", .{ import_str[1 .. import_str.len - 1], interpreter.uri });
|
|
|
|
// TODO: Implement root support
|
|
if (std.mem.eql(u8, import_str[1 .. import_str.len - 1], "root")) {
|
|
return InterpretResult{ .value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .struct_type = .{
|
|
.fields = &.{},
|
|
.namespace = .none,
|
|
.layout = .Auto,
|
|
.backing_int_ty = .none,
|
|
} }),
|
|
.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .undefined_value }),
|
|
} };
|
|
}
|
|
|
|
var import_uri = (try interpreter.document_store.uriFromImportStr(interpreter.allocator, interpreter.getHandle().*, import_str[1 .. import_str.len - 1])) orelse return error.ImportFailure;
|
|
defer interpreter.allocator.free(import_uri);
|
|
|
|
var handle = interpreter.document_store.getOrLoadHandle(import_uri) orelse return error.ImportFailure;
|
|
try interpreter.document_store.ensureInterpreterExists(handle.uri);
|
|
|
|
return InterpretResult{
|
|
.value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type }),
|
|
.val = .none, // TODO
|
|
},
|
|
};
|
|
}
|
|
|
|
if (std.mem.eql(u8, call_name, "@TypeOf")) {
|
|
if (params.len != 1) return error.InvalidBuiltin;
|
|
|
|
const value = try (try interpreter.interpret(params[0], namespace, options)).getValue();
|
|
return InterpretResult{ .value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type }),
|
|
.val = value.ty,
|
|
} };
|
|
}
|
|
|
|
if (std.mem.eql(u8, call_name, "@hasDecl")) {
|
|
if (params.len != 2) return error.InvalidBuiltin;
|
|
|
|
const value = try (try interpreter.interpret(params[0], namespace, options)).getValue();
|
|
const field_name = try (try interpreter.interpret(params[1], namespace, options)).getValue();
|
|
|
|
const type_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type });
|
|
|
|
if (value.ty != type_type) return error.InvalidBuiltin;
|
|
if (interpreter.ip.indexToKey(field_name.ty) != .pointer_type) return error.InvalidBuiltin; // Check if it's a []const u8
|
|
|
|
const value_namespace = interpreter.ip.indexToKey(value.val).getNamespace();
|
|
if (value_namespace == .none) return error.InvalidBuiltin;
|
|
|
|
const name = interpreter.ip.indexToKey(field_name.val).bytes; // TODO add checks
|
|
|
|
const decls = interpreter.namespaces.items(.decls)[@enumToInt(value_namespace)];
|
|
const has_decl = decls.contains(name);
|
|
|
|
return InterpretResult{ .value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .bool }),
|
|
.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = if (has_decl) .bool_true else .bool_false }),
|
|
} };
|
|
}
|
|
|
|
if (std.mem.eql(u8, call_name, "@as")) {
|
|
if (params.len != 2) return error.InvalidBuiltin;
|
|
|
|
const as_type = try (try interpreter.interpret(params[0], namespace, options)).getValue();
|
|
const value = try (try interpreter.interpret(params[1], namespace, options)).getValue();
|
|
|
|
const type_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type });
|
|
|
|
if (as_type.ty != type_type) return error.InvalidBuiltin;
|
|
|
|
return InterpretResult{
|
|
.value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = as_type.val,
|
|
.val = value.val, // TODO port Sema.coerceExtra to InternPool
|
|
},
|
|
};
|
|
}
|
|
|
|
log.err("Builtin not implemented: {s}", .{call_name});
|
|
return error.InvalidBuiltin;
|
|
},
|
|
.string_literal => {
|
|
const str = tree.getNodeSource(node_idx)[1 .. tree.getNodeSource(node_idx).len - 1];
|
|
|
|
const string_literal_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .pointer_type = .{
|
|
.elem_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .array_type = .{
|
|
.child = try interpreter.ip.get(interpreter.allocator, IPKey{ .int_type = .{
|
|
.signedness = .unsigned,
|
|
.bits = 8,
|
|
} }),
|
|
.len = @intCast(u32, str.len),
|
|
.sentinel = try interpreter.ip.get(interpreter.allocator, IPKey{ .int_u64_value = 0 }),
|
|
} }),
|
|
.sentinel = .none,
|
|
.alignment = 0,
|
|
.size = .One,
|
|
.is_const = true,
|
|
.is_volatile = false,
|
|
.is_allowzero = false,
|
|
.address_space = .generic,
|
|
} });
|
|
|
|
return InterpretResult{ .value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = string_literal_type,
|
|
.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .bytes = str }),
|
|
} };
|
|
},
|
|
// TODO: Add comptime autodetection; e.g. const MyArrayList = std.ArrayList(u8)
|
|
.@"comptime" => {
|
|
return try interpreter.interpret(data[node_idx].lhs, namespace, .{});
|
|
},
|
|
.fn_proto,
|
|
.fn_proto_multi,
|
|
.fn_proto_one,
|
|
.fn_proto_simple,
|
|
.fn_decl,
|
|
=> {
|
|
var buf: [1]Ast.Node.Index = undefined;
|
|
const func = ast.fnProto(tree, node_idx, &buf).?;
|
|
|
|
// TODO: Resolve function type
|
|
|
|
const type_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type });
|
|
|
|
const function_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .function_type = .{
|
|
.calling_convention = .Unspecified,
|
|
.alignment = 0,
|
|
.is_generic = false,
|
|
.is_var_args = false,
|
|
.return_type = IPIndex.none,
|
|
.args = &.{},
|
|
} });
|
|
|
|
// var it = func.iterate(&tree);
|
|
// while (ast.nextFnParam(&it)) |param| {
|
|
// // Add parameter decls
|
|
// if (param.name_token) |name_token| {
|
|
// // TODO: Think of new method for functions
|
|
// if ((try interpreter.interpret(param.type_expr, func_scope_idx, .{ .observe_values = true, .is_comptime = true })).maybeGetValue()) |value| {
|
|
// try interpreter.addDeclaration(func_scope_idx, value.value_data.@"type");
|
|
// try fnd.params.append(interpreter.allocator, interpreter.declarations.items.len - 1);
|
|
// } else {
|
|
// try interpreter.addDeclaration(parent_scope_idx.?, .{
|
|
// .node_idx = node_idx,
|
|
// .name = tree.tokenSlice(name_token),
|
|
// .scope_idx = func_scope_idx, // orelse std.math.maxInt(usize),
|
|
// .@"value" = undefined,
|
|
// .@"type" = interpreter.createType(0, .{ .@"anytype" = .{} }),
|
|
// });
|
|
// try fnd.params.append(interpreter.allocator, interpreter.declarations.items.len - 1);
|
|
// }
|
|
// }
|
|
// }
|
|
|
|
// if ((try interpreter.interpret(func.ast.return_type, func_scope_idx, .{ .observe_values = true, .is_comptime = true })).maybeGetValue()) |value|
|
|
// fnd.return_type = value.value_data.@"type";
|
|
|
|
const name = offsets.tokenToSlice(tree, func.name_token.?);
|
|
|
|
if (namespace != .none) {
|
|
const decls = &interpreter.namespaces.items(.decls)[@enumToInt(namespace)];
|
|
try decls.put(interpreter.allocator, name, .{
|
|
.name = name,
|
|
.ty = type_type,
|
|
.val = function_type,
|
|
.alignment = 0, // TODO
|
|
.address_space = .generic, // TODO
|
|
.is_pub = false, // TODO
|
|
.is_exported = false, // TODO
|
|
});
|
|
}
|
|
|
|
return InterpretResult{ .nothing = {} };
|
|
},
|
|
.call,
|
|
.call_comma,
|
|
.async_call,
|
|
.async_call_comma,
|
|
.call_one,
|
|
.call_one_comma,
|
|
.async_call_one,
|
|
.async_call_one_comma,
|
|
=> {
|
|
var params: [1]Ast.Node.Index = undefined;
|
|
const call_full = ast.callFull(tree, node_idx, ¶ms).?;
|
|
|
|
var args = try std.ArrayListUnmanaged(Value).initCapacity(interpreter.allocator, call_full.ast.params.len);
|
|
defer args.deinit(interpreter.allocator);
|
|
|
|
for (call_full.ast.params) |param| {
|
|
args.appendAssumeCapacity(try (try interpreter.interpret(param, namespace, .{})).getValue());
|
|
}
|
|
|
|
const func_id_result = try interpreter.interpret(call_full.ast.fn_expr, namespace, .{});
|
|
const func_id_val = try func_id_result.getValue();
|
|
|
|
const call_res = try interpreter.call(namespace, func_id_val.node_idx, args.items, options);
|
|
// TODO: Figure out call result memory model; this is actually fine because newScope
|
|
// makes this a child of the decl scope which is freed on refresh... in theory
|
|
|
|
return switch (call_res.result) {
|
|
.value => |v| .{ .value = v },
|
|
.nothing => .{ .nothing = {} },
|
|
};
|
|
},
|
|
.bool_not => {
|
|
const result = try interpreter.interpret(data[node_idx].lhs, namespace, .{});
|
|
const bool_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .bool });
|
|
const value = try result.getValue();
|
|
|
|
if (value.ty != bool_type) {
|
|
try interpreter.recordError(
|
|
node_idx,
|
|
"invalid_deref",
|
|
"expected type `bool` but got `{}`",
|
|
.{value.ty.fmtType(interpreter.ip)},
|
|
);
|
|
return error.InvalidOperation;
|
|
}
|
|
|
|
const false_value = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .bool_false });
|
|
const true_value = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .bool_true });
|
|
|
|
std.debug.assert(value.val == false_value or value.val == true_value);
|
|
return InterpretResult{ .value = .{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = bool_type,
|
|
.val = if (value.val == false_value) true_value else false_value,
|
|
} };
|
|
},
|
|
.address_of => {
|
|
// TODO: Make const pointers if we're drawing from a const;
|
|
// variables are the only non-const(?)
|
|
|
|
const result = try interpreter.interpret(data[node_idx].lhs, namespace, .{});
|
|
const value = (try result.getValue());
|
|
|
|
const pointer_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .pointer_type = .{
|
|
.elem_type = value.ty,
|
|
.sentinel = .none,
|
|
.alignment = 0,
|
|
.size = .One,
|
|
.is_const = false,
|
|
.is_volatile = false,
|
|
.is_allowzero = false,
|
|
.address_space = .generic,
|
|
} });
|
|
|
|
return InterpretResult{ .value = .{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = pointer_type,
|
|
.val = value.val,
|
|
} };
|
|
},
|
|
.deref => {
|
|
const result = try interpreter.interpret(data[node_idx].lhs, namespace, .{});
|
|
const value = (try result.getValue());
|
|
|
|
const type_key = interpreter.ip.indexToKey(value.ty);
|
|
|
|
if (type_key != .pointer_type) {
|
|
try interpreter.recordError(node_idx, "invalid_deref", "cannot deference non-pointer", .{});
|
|
return error.InvalidOperation;
|
|
}
|
|
|
|
return InterpretResult{ .value = .{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = type_key.pointer_type.elem_type,
|
|
.val = value.val,
|
|
} };
|
|
},
|
|
else => {
|
|
log.err("Unhandled {any}", .{tags[node_idx]});
|
|
return InterpretResult{ .nothing = {} };
|
|
},
|
|
}
|
|
}
|
|
|
|
pub const CallResult = struct {
|
|
namespace: NamespaceIndex,
|
|
result: union(enum) {
|
|
value: Value,
|
|
nothing,
|
|
},
|
|
};
|
|
|
|
pub fn call(
|
|
interpreter: *ComptimeInterpreter,
|
|
namespace: NamespaceIndex,
|
|
func_node_idx: Ast.Node.Index,
|
|
arguments: []const Value,
|
|
options: InterpretOptions,
|
|
) InterpretError!CallResult {
|
|
// _ = options;
|
|
|
|
// TODO: type check args
|
|
|
|
const tree = interpreter.getHandle().tree;
|
|
|
|
var buf: [1]Ast.Node.Index = undefined;
|
|
var proto = ast.fnProto(tree, func_node_idx, &buf) orelse return error.CriticalAstFailure;
|
|
|
|
// TODO: Make argument namespace to evaluate arguments in
|
|
try interpreter.namespaces.append(interpreter.allocator, .{
|
|
.parent = namespace,
|
|
.node_idx = func_node_idx,
|
|
.ty = .none,
|
|
});
|
|
const fn_namespace = @intToEnum(NamespaceIndex, interpreter.namespaces.len - 1);
|
|
|
|
const type_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type });
|
|
|
|
var arg_it = proto.iterate(&tree);
|
|
var arg_index: usize = 0;
|
|
while (ast.nextFnParam(&arg_it)) |param| {
|
|
if (arg_index >= arguments.len) return error.MissingArguments;
|
|
var tex = try (try interpreter.interpret(param.type_expr, fn_namespace, options)).getValue();
|
|
if (tex.ty != type_type) {
|
|
try interpreter.recordError(
|
|
param.type_expr,
|
|
"expected_type",
|
|
"expected type 'type', found '{}'",
|
|
.{tex.ty.fmtType(interpreter.ip)},
|
|
);
|
|
return error.InvalidCast;
|
|
}
|
|
if (param.name_token) |name_token| {
|
|
const name = offsets.tokenToSlice(tree, name_token);
|
|
|
|
try interpreter.namespaces.items(.decls)[@enumToInt(fn_namespace)].put(interpreter.allocator, name, .{
|
|
.name = name,
|
|
.ty = tex.val,
|
|
.val = arguments[arg_index].val,
|
|
.alignment = 0, // TODO
|
|
.address_space = .generic, // TODO
|
|
.is_pub = true, // TODO
|
|
.is_exported = false, // TODO
|
|
});
|
|
arg_index += 1;
|
|
}
|
|
}
|
|
|
|
const body = tree.nodes.items(.data)[func_node_idx].rhs;
|
|
const result = try interpreter.interpret(body, fn_namespace, .{});
|
|
|
|
// TODO: Defers
|
|
return CallResult{
|
|
.namespace = fn_namespace,
|
|
.result = switch (result) {
|
|
.@"return", .nothing => .{ .nothing = {} }, // nothing could be due to an error
|
|
.return_with_value => |v| .{ .value = v },
|
|
else => @panic("bruh"),
|
|
},
|
|
};
|
|
}
|