1180 lines
47 KiB
Zig
1180 lines
47 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 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 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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// TODO: Investigate arena
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allocator: std.mem.Allocator,
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arena: std.heap.ArenaAllocator,
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ip: InternPool = .{},
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document_store: *DocumentStore,
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uri: DocumentStore.Uri,
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root_type: IPIndex = IPIndex.none,
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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(interpreter: *ComptimeInterpreter, node_idx: Ast.Node.Index, code: []const u8, message: []const u8) 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 = message,
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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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}
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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 FieldDefinition = struct {
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node_idx: Ast.Node.Index,
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/// Store name so tree doesn't need to be used to access field name
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name: []const u8,
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ty: Type,
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default_value: ?Value,
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};
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pub const Declaration = struct {
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scope: *InterpreterScope,
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node_idx: Ast.Node.Index,
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/// Store name so tree doesn't need to be used to access declaration name
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name: []const u8,
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/// If value is null, declaration has not been interpreted yet
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value: ?Value = null,
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// TODO: figure this out
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// pub const DeclarationKind = enum{variable, function};
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// pub fn declarationKind(declaration: Declaration, tree: Ast) DeclarationKind {
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// return switch(tree.nodes.items(.tag)[declaration.node_idx]) {
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// .fn_proto,
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// .fn_proto_one,
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// .fn_proto_simple,
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// .fn_proto_multi,
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// .fn_decl
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// }
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// }
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pub fn getValue(decl: *Declaration) InterpretError!Value {
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var interpreter = decl.scope.interpreter;
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const tree = decl.scope.interpreter.getHandle().tree;
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const tags = tree.nodes.items(.tag);
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if (decl.value == null) {
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switch (tags[decl.node_idx]) {
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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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const var_decl = ast.varDecl(tree, decl.node_idx).?;
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if (var_decl.ast.init_node == 0)
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return error.CriticalAstFailure;
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var value = try (try interpreter.interpret(var_decl.ast.init_node, decl.scope, .{})).getValue();
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if (var_decl.ast.type_node != 0) {
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var type_val = try (try interpreter.interpret(var_decl.ast.type_node, decl.scope, .{})).getValue();
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const type_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type });
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if (type_val.ty != type_type) {
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try interpreter.recordError(
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decl.node_idx,
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"expected_type",
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std.fmt.allocPrint(interpreter.allocator, "expected type 'type', found '{}'", .{type_val.ty.fmtType(&interpreter.ip)}) catch return error.CriticalAstFailure,
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);
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return error.InvalidCast;
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}
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value = try interpreter.cast(var_decl.ast.type_node, type_val.value_data.type, value);
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}
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decl.value = value;
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},
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else => @panic("No other case supported for lazy declaration evaluation"),
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}
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}
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return decl.value.?;
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}
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pub fn isConstant(declaration: Declaration) bool {
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const tree = declaration.scope.interpreter.getHandle().tree;
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return switch (tree.nodes.items(.tag)[declaration.node_idx]) {
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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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return tree.tokenSlice(ast.varDecl(tree, declaration.node_idx).?.ast.mut_token).len != 3;
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},
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else => false,
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};
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}
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};
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// pub const Comptimeness = enum { @"comptime", runtime };
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pub const InterpreterScope = struct {
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interpreter: *ComptimeInterpreter,
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// TODO: Actually use this value
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// comptimeness: Comptimeness,
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parent: ?*InterpreterScope = null,
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node_idx: Ast.Node.Index,
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declarations: std.StringHashMapUnmanaged(Declaration) = .{},
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/// Resizes can modify element pointer locations, so we use a list of pointers
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child_scopes: std.ArrayListUnmanaged(*InterpreterScope) = .{},
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pub const ScopeKind = enum { container, block, function };
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pub fn scopeKind(scope: InterpreterScope) ScopeKind {
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const tree = scope.interpreter.getHandle().tree;
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return switch (tree.nodes.items(.tag)[scope.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,
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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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.error_set_decl,
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=> .container,
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else => .block,
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};
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}
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pub fn getLabel(scope: InterpreterScope) ?Ast.TokenIndex {
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const tree = scope.interpreter.getHandle().tree;
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const token_tags = tree.tokens.items(.tag);
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return switch (scope.scopeKind()) {
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.block => z: {
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const lbrace = tree.nodes.items(.main_token)[scope.node_idx];
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break :z if (token_tags[lbrace - 1] == .colon and token_tags[lbrace - 2] == .identifier)
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lbrace - 2
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else
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null;
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},
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else => null,
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};
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}
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pub const ParentScopeIterator = struct {
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maybe_scope: ?*InterpreterScope,
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pub fn next(psi: *ParentScopeIterator) ?*InterpreterScope {
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if (psi.maybe_scope) |scope| {
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const curr = scope;
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psi.maybe_scope = scope.parent;
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return curr;
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} else return null;
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}
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};
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pub fn parentScopeIterator(scope: *InterpreterScope) ParentScopeIterator {
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return ParentScopeIterator{ .maybe_scope = scope };
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}
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pub fn deinit(scope: *InterpreterScope) void {
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const allocator = scope.interpreter.allocator;
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scope.declarations.deinit(allocator);
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for (scope.child_scopes.items) |child| child.deinit();
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scope.child_scopes.deinit(allocator);
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allocator.destroy(scope);
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}
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};
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pub fn newScope(
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interpreter: *ComptimeInterpreter,
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maybe_parent: ?*InterpreterScope,
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node_idx: Ast.Node.Index,
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) std.mem.Allocator.Error!*InterpreterScope {
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var ls = try interpreter.allocator.create(InterpreterScope);
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if (maybe_parent) |parent| try parent.child_scopes.append(interpreter.allocator, ls);
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ls.* = .{
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.interpreter = interpreter,
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.parent = maybe_parent,
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.node_idx = node_idx,
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};
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return ls;
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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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fn getDeclCount(tree: Ast, node_idx: Ast.Node.Index) usize {
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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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var count: usize = 0;
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for (members) |member| {
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switch (tree.nodes.items(.tag)[member]) {
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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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=> count += 1,
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else => {},
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}
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}
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return count;
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}
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pub fn huntItDown(
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interpreter: *ComptimeInterpreter,
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scope: *InterpreterScope,
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decl_name: []const u8,
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options: InterpretOptions,
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) InterpretError!*Declaration {
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const tree = interpreter.getHandle().tree;
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const tags = tree.nodes.items(.tag);
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var psi = scope.parentScopeIterator();
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while (psi.next()) |pscope| {
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const known_decl = pscope.declarations.getEntry(decl_name);
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if (pscope.scopeKind() == .container and
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known_decl == null and
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pscope.declarations.count() != getDeclCount(tree, pscope.node_idx))
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{
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log.info("Order-independent evaluating {s}...", .{decl_name});
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var buffer: [2]Ast.Node.Index = undefined;
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const members = ast.declMembers(tree, pscope.node_idx, &buffer);
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for (members) |member| {
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switch (tags[member]) {
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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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if (std.mem.eql(u8, analysis.getDeclName(tree, member).?, decl_name)) {
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_ = try interpreter.interpret(member, pscope, options);
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return pscope.declarations.getEntry(decl_name).?.value_ptr;
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}
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},
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else => {},
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}
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}
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}
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return (known_decl orelse continue).value_ptr;
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}
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log.err("Identifier not found: {s}", .{decl_name});
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return error.IdentifierNotFound;
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}
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pub fn cast(
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interpreter: *ComptimeInterpreter,
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node_idx: Ast.Node.Index,
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dest_type: Type,
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value: Value,
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) error{ OutOfMemory, InvalidCast }!Value {
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const value_data = value.value_data;
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const to_type_info = dest_type.getTypeInfo();
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const from_type_info = value.type.getTypeInfo();
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// TODO: Implement more implicit casts
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if (from_type_info.eql(to_type_info)) return value;
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const err = switch (from_type_info) {
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.comptime_int => switch (to_type_info) {
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.int => {
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if (value_data.bitCount().? > to_type_info.int.bits) {
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switch (value_data.*) {
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.unsigned_int => |bi| try interpreter.recordError(node_idx, "invalid_cast", try std.fmt.allocPrint(interpreter.allocator, "integer value {d} cannot be coerced to type '{s}'", .{ bi, interpreter.formatTypeInfo(to_type_info) })),
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.signed_int => |bi| try interpreter.recordError(node_idx, "invalid_cast", try std.fmt.allocPrint(interpreter.allocator, "integer value {d} cannot be coerced to type '{s}'", .{ bi, interpreter.formatTypeInfo(to_type_info) })),
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.big_int => |bi| try interpreter.recordError(node_idx, "invalid_cast", try std.fmt.allocPrint(interpreter.allocator, "integer value {d} cannot be coerced to type '{s}'", .{ bi, interpreter.formatTypeInfo(to_type_info) })),
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else => unreachable,
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}
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return error.InvalidCast;
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}
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},
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else => error.InvalidCast,
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},
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else => error.InvalidCast,
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};
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err catch |e| {
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try interpreter.recordError(node_idx, "invalid_cast", try std.fmt.allocPrint(interpreter.allocator, "invalid cast from '{s}' to '{s}'", .{ interpreter.formatTypeInfo(from_type_info), interpreter.formatTypeInfo(to_type_info) }));
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return e;
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};
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return Value{
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.interpreter = interpreter,
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.node_idx = node_idx,
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.type = dest_type,
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.value_data = value.value_data,
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};
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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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scope: ?*InterpreterScope,
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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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.error_set_decl,
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=> {
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var container_scope = try interpreter.newScope(scope, node_idx);
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var fields = std.StringArrayHashMapUnmanaged(InternPool.Struct.Field){};
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errdefer fields.deinit(interpreter.allocator);
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// if (node_idx == 0) interpreter.root_type = cont_type;
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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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const type_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type });
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for (members) |member| {
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const maybe_container_field: ?zig.Ast.full.ContainerField = switch (tags[member]) {
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.container_field => tree.containerField(member),
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.container_field_align => tree.containerFieldAlign(member),
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.container_field_init => tree.containerFieldInit(member),
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else => null,
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};
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if (maybe_container_field) |field_info| {
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var init_type_value = try (try interpreter.interpret(field_info.ast.type_expr, container_scope, .{})).getValue();
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var default_value = if (field_info.ast.value_expr == 0)
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IPIndex.none
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else
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(try (try interpreter.interpret(field_info.ast.value_expr, container_scope, .{})).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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field_info.ast.type_expr,
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"expected_type",
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try std.fmt.allocPrint(interpreter.allocator, "expected type 'type', found '{}'", .{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 name = tree.tokenSlice(field_info.ast.main_token);
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const field: InternPool.Struct.Field = .{
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.ty = init_type_value.val,
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.default_value = default_value,
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.alignent = 0, // TODO,
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.is_comptime = false, // TODO
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};
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try fields.put(interpreter.arena.allocator(), name, field);
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} else {
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_ = try interpreter.interpret(member, container_scope, options);
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}
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}
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const namespace = try interpreter.ip.get(interpreter.allocator, IPKey{
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.namespace = .{
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.parent = IPIndex.none,
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.ty = undefined, // TODO
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.decls = undefined, // TODO,
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.usingnamespaces = .{},
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},
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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,
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.namespace = namespace, // TODO
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.layout = std.builtin.Type.ContainerLayout.Auto, // TODO
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.backing_int_ty = IPIndex.none, // TODO
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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 = type_type,
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.val = struct_type,
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} };
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},
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.global_var_decl,
|
|
.local_var_decl,
|
|
.aligned_var_decl,
|
|
.simple_var_decl,
|
|
=> {
|
|
// TODO: Add 0 check
|
|
const name = analysis.getDeclName(tree, node_idx).?;
|
|
if (scope.?.declarations.contains(name))
|
|
return InterpretResult{ .nothing = {} };
|
|
|
|
const decl = ast.varDecl(tree, node_idx).?;
|
|
if (decl.ast.init_node == 0)
|
|
return InterpretResult{ .nothing = {} };
|
|
|
|
try scope.?.declarations.put(interpreter.allocator, name, .{
|
|
.scope = scope.?,
|
|
.node_idx = node_idx,
|
|
.name = name,
|
|
});
|
|
|
|
// TODO: Am I a dumbo shrimp? (e.g. is this tree shaking correct? works on my machine so like...)
|
|
|
|
// if (scope.?.scopeKind() != .container) {
|
|
if (scope.?.node_idx != 0)
|
|
_ = try scope.?.declarations.getPtr(name).?.getValue();
|
|
|
|
return InterpretResult{ .nothing = {} };
|
|
},
|
|
.block,
|
|
.block_semicolon,
|
|
.block_two,
|
|
.block_two_semicolon,
|
|
=> {
|
|
// try interpreter.scopes.append(interpreter.allocator, .{
|
|
// .node_idx = node_idx,
|
|
// .parent_scope = parent_scope_idx orelse std.math.maxInt(usize),
|
|
// });
|
|
// const scope_idx = interpreter.scopes.items.len - 1;
|
|
|
|
var block_scope = try interpreter.newScope(scope, node_idx);
|
|
|
|
var buffer: [2]Ast.Node.Index = undefined;
|
|
const statements = ast.blockStatements(tree, node_idx, &buffer).?;
|
|
|
|
for (statements) |idx| {
|
|
const ret = try interpreter.interpret(idx, block_scope, options);
|
|
switch (ret) {
|
|
.@"break" => |lllll| {
|
|
const maybe_block_label_string = if (scope.?.getLabel()) |i| tree.tokenSlice(i) else null;
|
|
if (lllll) |l| {
|
|
if (maybe_block_label_string) |ls| {
|
|
if (std.mem.eql(u8, l, ls)) {
|
|
return InterpretResult{ .nothing = {} };
|
|
} else return ret;
|
|
} else return ret;
|
|
} else {
|
|
return InterpretResult{ .nothing = {} };
|
|
}
|
|
},
|
|
.break_with_value => |bwv| {
|
|
const maybe_block_label_string = if (scope.?.getLabel()) |i| tree.tokenSlice(i) else null;
|
|
|
|
if (bwv.label) |l| {
|
|
if (maybe_block_label_string) |ls| {
|
|
if (std.mem.eql(u8, l, ls)) {
|
|
return InterpretResult{ .value = bwv.value };
|
|
} else return ret;
|
|
} else return ret;
|
|
} else {
|
|
return InterpretResult{ .value = bwv.value };
|
|
}
|
|
},
|
|
.@"return", .return_with_value => return ret,
|
|
else => {},
|
|
}
|
|
}
|
|
|
|
return InterpretResult{ .nothing = {} };
|
|
},
|
|
.identifier => {
|
|
var value = tree.getNodeSource(node_idx);
|
|
|
|
if (std.mem.eql(u8, "bool", value)) return InterpretResult{ .value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type }),
|
|
.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .bool }),
|
|
} };
|
|
if (std.mem.eql(u8, "true", value)) 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 = .bool_true }),
|
|
} };
|
|
if (std.mem.eql(u8, "false", value)) 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 = .bool_false }),
|
|
} };
|
|
|
|
if (value.len == 5 and (value[0] == 'u' or value[0] == 'i') and std.mem.eql(u8, "size", value[1..])) return InterpretResult{
|
|
.value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type }),
|
|
.val = try interpreter.ip.get(interpreter.allocator, IPKey{
|
|
.simple = if (value[0] == 'u') .usize else .isize,
|
|
}),
|
|
},
|
|
};
|
|
|
|
if (std.mem.eql(u8, "type", value)) {
|
|
return InterpretResult{ .value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type }),
|
|
.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type }),
|
|
} };
|
|
} else if (value.len >= 2 and (value[0] == 'u' or value[0] == 'i')) int: {
|
|
return InterpretResult{ .value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type }),
|
|
.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .int_type = .{
|
|
.signedness = if (value[0] == 'u') .unsigned else .signed,
|
|
.bits = std.fmt.parseInt(u16, value[1..], 10) catch break :int,
|
|
} }),
|
|
} };
|
|
}
|
|
|
|
// TODO: Floats
|
|
|
|
// Logic to find identifiers in accessible scopes
|
|
return InterpretResult{ .value = try (interpreter.huntItDown(scope.?, value, options) catch |err| {
|
|
if (err == error.IdentifierNotFound) try interpreter.recordError(
|
|
node_idx,
|
|
"undeclared_identifier",
|
|
try std.fmt.allocPrint(interpreter.allocator, "use of undeclared identifier '{s}'", .{value}),
|
|
);
|
|
return err;
|
|
}).getValue() };
|
|
},
|
|
.field_access => {
|
|
if (data[node_idx].rhs == 0) return error.CriticalAstFailure;
|
|
const rhs_str = ast.tokenSlice(tree, data[node_idx].rhs) catch return error.CriticalAstFailure;
|
|
|
|
var ir = try interpreter.interpret(data[node_idx].lhs, scope, options);
|
|
var irv = try ir.getValue();
|
|
|
|
var sub_scope = irv.value_data.type.getTypeInfo().getScopeOfType() orelse return error.IdentifierNotFound;
|
|
var scope_sub_decl = sub_scope.interpreter.huntItDown(sub_scope, rhs_str, options) catch |err| {
|
|
if (err == error.IdentifierNotFound) try interpreter.recordError(
|
|
node_idx,
|
|
"undeclared_identifier",
|
|
try std.fmt.allocPrint(interpreter.allocator, "use of undeclared identifier '{s}'", .{rhs_str}),
|
|
);
|
|
return err;
|
|
};
|
|
|
|
return InterpretResult{
|
|
.value = try scope_sub_decl.getValue(),
|
|
};
|
|
},
|
|
.grouped_expression => {
|
|
return try interpreter.interpret(data[node_idx].lhs, scope, options);
|
|
},
|
|
.@"break" => {
|
|
const label = if (data[node_idx].lhs == 0) null else tree.tokenSlice(data[node_idx].lhs);
|
|
return if (data[node_idx].rhs == 0)
|
|
InterpretResult{ .@"break" = label }
|
|
else
|
|
InterpretResult{ .break_with_value = .{ .label = label, .value = try (try interpreter.interpret(data[node_idx].rhs, scope, options)).getValue() } };
|
|
},
|
|
.@"return" => {
|
|
return if (data[node_idx].lhs == 0)
|
|
InterpretResult{ .@"return" = {} }
|
|
else
|
|
InterpretResult{ .return_with_value = try (try interpreter.interpret(data[node_idx].lhs, scope, options)).getValue() };
|
|
},
|
|
.@"if", .if_simple => {
|
|
const iff = ast.ifFull(tree, node_idx);
|
|
// TODO: Don't evaluate runtime ifs
|
|
// if (options.observe_values) {
|
|
const ir = try interpreter.interpret(iff.ast.cond_expr, scope, options);
|
|
if ((try ir.getValue()).value_data.bool) {
|
|
return try interpreter.interpret(iff.ast.then_expr, scope, options);
|
|
} else {
|
|
if (iff.ast.else_expr != 0) {
|
|
return try interpreter.interpret(iff.ast.else_expr, scope, options);
|
|
} else return InterpretResult{ .nothing = {} };
|
|
}
|
|
},
|
|
.equal_equal => {
|
|
var a = try interpreter.interpret(data[node_idx].lhs, scope, options);
|
|
var b = try interpreter.interpret(data[node_idx].rhs, scope, options);
|
|
return InterpretResult{
|
|
.value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .bool }),
|
|
.val = try interpreter.createValueData(.{ .bool = (try a.getValue()).eql(try b.getValue()) }), // TODO
|
|
},
|
|
};
|
|
// a.getValue().eql(b.getValue())
|
|
},
|
|
.number_literal => {
|
|
const s = tree.getNodeSource(node_idx);
|
|
const nl = std.zig.parseNumberLiteral(s);
|
|
|
|
if (nl == .failure) return error.CriticalAstFailure;
|
|
|
|
const comptime_int_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_64_value = try std.fmt.parseFloat(f64, s), // shouldn't this be f128?
|
|
},
|
|
.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 = comptime_int_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, scope.?, options);
|
|
return InterpretResult{ .nothing = {} };
|
|
}
|
|
|
|
var ir = try interpreter.interpret(data[node_idx].lhs, scope, options);
|
|
var to_value = try ir.getValue();
|
|
var from_value = (try (try interpreter.interpret(data[node_idx].rhs, scope.?, options)).getValue());
|
|
|
|
to_value.value_data.* = (try interpreter.cast(node_idx, to_value.type, from_value)).value_data.*;
|
|
|
|
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, scope, options)).maybeGetValue() orelse {
|
|
try writer.writeAll("indeterminate");
|
|
continue;
|
|
};
|
|
try writer.print("@as({s}, {s})", .{ interpreter.formatTypeInfo(value.type.getTypeInfo()), interpreter.formatValue(value) });
|
|
if (index != params.len - 1)
|
|
try writer.writeAll(", ");
|
|
}
|
|
try interpreter.recordError(node_idx, "compile_log", final.toOwnedSlice());
|
|
|
|
return InterpretResult{ .nothing = {} };
|
|
}
|
|
|
|
if (std.mem.eql(u8, call_name, "@compileError")) {
|
|
// TODO: Add message
|
|
try interpreter.recordError(node_idx, "compile_error", try std.fmt.allocPrint(interpreter.allocator, "compile error", .{}));
|
|
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.createType(node_idx, .{ .@"struct" = .{ .scope = try interpreter.newScope(null, 0) } }),
|
|
.val = try interpreter.createValueData(.{ .@"struct" = .{} }),
|
|
} };
|
|
}
|
|
|
|
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 = try interpreter.ip.get(interpreter.allocator, IPKey{ .type_value = handle.interpreter.?.root_type.? }),
|
|
} };
|
|
}
|
|
|
|
if (std.mem.eql(u8, call_name, "@TypeOf")) {
|
|
if (params.len != 1) return error.InvalidBuiltin;
|
|
|
|
const value = try (try interpreter.interpret(params[0], scope, options)).getValue();
|
|
return InterpretResult{ .value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .type }),
|
|
.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .type_value = 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], scope, options)).getValue();
|
|
const field_name = try (try interpreter.interpret(params[1], scope, options)).getValue();
|
|
|
|
if (value.type.getTypeInfo() != .type) return error.InvalidBuiltin;
|
|
if (field_name.type.getTypeInfo() != .pointer) return error.InvalidBuiltin; // Check if it's a []const u8
|
|
|
|
const ti = value.value_data.type.getTypeInfo();
|
|
if (ti.getScopeOfType() == null) return error.InvalidBuiltin;
|
|
|
|
const has_decl = ti.getScopeOfType().?.declarations.contains(field_name.value_data.slice_of_const_u8);
|
|
|
|
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], scope, options)).getValue();
|
|
const value = try (try interpreter.interpret(params[1], scope, options)).getValue();
|
|
|
|
if (as_type.type.getTypeInfo() != .type) return error.InvalidBuiltin;
|
|
|
|
return InterpretResult{ .value = try interpreter.cast(node_idx, as_type.value_data.type, value) };
|
|
}
|
|
|
|
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,
|
|
} }),
|
|
.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,
|
|
} });
|
|
|
|
var val = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = string_literal_type,
|
|
.val = try interpreter.ip.get(interpreter.allocator, IPKey{ .bytes = str }), // TODO
|
|
};
|
|
|
|
// TODO: Add type casting, sentinel
|
|
// TODO: Should this be a `*const [len:0]u8`?
|
|
// try val.value_data.slice_ptr.append(interpreter.allocator, .{ .unsigned_int = 0 });
|
|
|
|
return InterpretResult{ .value = val };
|
|
},
|
|
// TODO: Add comptime autodetection; e.g. const MyArrayList = std.ArrayList(u8)
|
|
.@"comptime" => {
|
|
return try interpreter.interpret(data[node_idx].lhs, scope, .{});
|
|
},
|
|
// .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 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";
|
|
|
|
var value = Value{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = function_type,
|
|
.value_data = IPIndex.none, // TODO
|
|
};
|
|
|
|
const name = analysis.getDeclName(tree, node_idx).?;
|
|
try scope.?.declarations.put(interpreter.allocator, name, .{
|
|
.scope = scope.?,
|
|
.node_idx = node_idx,
|
|
.name = name,
|
|
.value = value,
|
|
});
|
|
|
|
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) orelse unreachable;
|
|
|
|
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| {
|
|
try args.append(interpreter.allocator, try (try interpreter.interpret(param, scope, .{})).getValue());
|
|
}
|
|
|
|
const func_id_result = try interpreter.interpret(call_full.ast.fn_expr, interpreter.root_type.?.getTypeInfo().getScopeOfType().?, .{});
|
|
const func_id_val = try func_id_result.getValue();
|
|
|
|
const call_res = try interpreter.call(interpreter.root_type.?.getTypeInfo().getScopeOfType().?, func_id_val.node_idx, args.items, options);
|
|
// defer call_res.scope.deinit();
|
|
// 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, scope, .{});
|
|
const bool_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .simple = .bool });
|
|
const value = try result.getValue();
|
|
if (value.type == bool_type) {
|
|
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 not_value = if (value.value == false_value) true_value else if (value.value == true_value) false_value else return error.InvalidOperation;
|
|
return InterpretResult{
|
|
.value = .{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = bool_type,
|
|
.val = not_value,
|
|
},
|
|
};
|
|
} else {
|
|
// TODO
|
|
return error.InvalidOperation;
|
|
}
|
|
},
|
|
.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, scope, .{});
|
|
const value = (try result.getValue());
|
|
|
|
const pointer_type = try interpreter.ip.get(interpreter.allocator, IPKey{ .pointer_type = .{
|
|
.elem_type = value.type,
|
|
.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 = try interpreter.createValueData(.{ .one_ptr = value.value_data }),
|
|
} };
|
|
},
|
|
.deref => {
|
|
const result = try interpreter.interpret(data[node_idx].lhs, scope, .{});
|
|
const value = (try result.getValue());
|
|
|
|
const type_key = interpreter.ip.indexToKey(value.ty);
|
|
|
|
if (type_key != .pointer) {
|
|
try interpreter.recordError(node_idx, "invalid_deref", try std.fmt.allocPrint(interpreter.allocator, "cannot deference non-pointer", .{}));
|
|
return error.InvalidOperation;
|
|
}
|
|
|
|
// TODO: Check if this is a one_ptr or not
|
|
|
|
return InterpretResult{ .value = .{
|
|
.interpreter = interpreter,
|
|
.node_idx = node_idx,
|
|
.ty = type_key.pointer_type.elem_type,
|
|
.val = value.value_data.one_ptr,
|
|
} };
|
|
},
|
|
else => {
|
|
log.err("Unhandled {any}", .{tags[node_idx]});
|
|
return InterpretResult{ .nothing = {} };
|
|
},
|
|
}
|
|
}
|
|
|
|
pub const CallResult = struct {
|
|
scope: *InterpreterScope,
|
|
result: union(enum) {
|
|
value: Value,
|
|
nothing,
|
|
},
|
|
};
|
|
|
|
pub fn call(
|
|
interpreter: *ComptimeInterpreter,
|
|
scope: ?*InterpreterScope,
|
|
func_node_idx: Ast.Node.Index,
|
|
arguments: []const Value,
|
|
options: InterpretOptions,
|
|
) InterpretError!CallResult {
|
|
// _ = options;
|
|
|
|
// TODO: type check args
|
|
|
|
const tree = interpreter.getHandle().tree;
|
|
const tags = tree.nodes.items(.tag);
|
|
|
|
if (tags[func_node_idx] != .fn_decl) return error.CriticalAstFailure;
|
|
|
|
// TODO: Make argument scope to evaluate arguments in
|
|
var fn_scope = try interpreter.newScope(scope, func_node_idx);
|
|
|
|
var buf: [1]Ast.Node.Index = undefined;
|
|
var proto = ast.fnProto(tree, func_node_idx, &buf).?;
|
|
|
|
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_scope, options)).getValue();
|
|
if (tex.type.getTypeInfo() != .type) {
|
|
try interpreter.recordError(
|
|
param.type_expr,
|
|
"expected_type",
|
|
std.fmt.allocPrint(interpreter.allocator, "expected type 'type', found '{s}'", .{interpreter.formatTypeInfo(tex.type.getTypeInfo())}) catch return error.CriticalAstFailure,
|
|
);
|
|
return error.InvalidCast;
|
|
}
|
|
if (param.name_token) |nt| {
|
|
const decl = Declaration{
|
|
.scope = fn_scope,
|
|
.node_idx = param.type_expr,
|
|
.name = tree.tokenSlice(nt),
|
|
.value = try interpreter.cast(arguments[arg_index].node_idx, tex.value_data.type, arguments[arg_index]),
|
|
};
|
|
try fn_scope.declarations.put(interpreter.allocator, tree.tokenSlice(nt), decl);
|
|
arg_index += 1;
|
|
}
|
|
}
|
|
|
|
const body = tree.nodes.items(.data)[func_node_idx].rhs;
|
|
const result = try interpreter.interpret(body, fn_scope, .{});
|
|
|
|
// TODO: Defers
|
|
return CallResult{
|
|
.scope = fn_scope,
|
|
.result = switch (result) {
|
|
.@"return", .nothing => .{ .nothing = {} }, // nothing could be due to an error
|
|
.return_with_value => |v| .{ .value = v },
|
|
else => @panic("bruh"),
|
|
},
|
|
};
|
|
}
|