416 lines
14 KiB
Zig
416 lines
14 KiB
Zig
const std = @import("std");
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const zls = @import("zls");
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const builtin = @import("builtin");
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const Ast = std.zig.Ast;
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const ComptimeInterpreter = zls.ComptimeInterpreter;
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const InternPool = zls.analyser.InternPool;
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const Index = InternPool.Index;
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const Key = InternPool.Key;
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const ast = zls.ast;
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const offsets = zls.offsets;
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const allocator: std.mem.Allocator = std.testing.allocator;
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test "ComptimeInterpreter - primitive types" {
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try testExpr("true", .{ .simple = .bool }, .{ .simple = .bool_true });
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try testExpr("false", .{ .simple = .bool }, .{ .simple = .bool_false });
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try testExpr("5", .{ .simple = .comptime_int }, .{ .int_u64_value = 5 });
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// TODO try testExpr("-2", .{ .simple = .comptime_int }, .{ .int_i64_value = -2 });
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try testExpr("3.0", .{ .simple = .comptime_float }, null);
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try testExpr("null", .{ .simple = .null_type }, .{ .simple = .null_value });
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try testExpr("void", .{ .simple = .type }, .{ .simple = .void });
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try testExpr("undefined", .{ .simple = .undefined_type }, .{ .simple = .undefined_value });
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try testExpr("noreturn", .{ .simple = .type }, .{ .simple = .noreturn });
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}
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test "ComptimeInterpreter - expressions" {
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if (true) return error.SkipZigTest; // TODO
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try testExpr("5 + 3", .{ .simple = .comptime_int }, .{ .int_u64_value = 8 });
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try testExpr("5.2 + 4.2", .{ .simple = .comptime_float }, null);
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try testExpr("3 == 3", .{ .simple = .bool }, .{ .simple = .bool_true });
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try testExpr("5.2 == 2.1", .{ .simple = .bool }, .{ .simple = .bool_false });
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try testExpr("@as(?bool, null) orelse true", .{ .simple = .bool }, .{ .simple = .bool_true });
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}
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test "ComptimeInterpreter - builtins" {
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if (true) return error.SkipZigTest; // TODO
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try testExpr("@as(bool, true)", .{ .simple = .bool }, .{ .simple = .bool_true });
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try testExpr("@as(u32, 3)", .{ .int_type = .{
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.signedness = .unsigned,
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.bits = 32,
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} }, .{ .int_u64_value = 3 });
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}
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test "ComptimeInterpreter - string literal" {
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var context = try Context.init(
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\\const foobarbaz = "hello world!";
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\\
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);
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defer context.deinit();
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const result = try context.interpret(context.findVar("foobarbaz"));
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try std.testing.expect(result.ty == .pointer_type);
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try std.testing.expectEqualStrings("hello world!", result.val.?.bytes);
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}
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test "ComptimeInterpreter - labeled block" {
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try testExpr(
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\\blk: {
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\\ break :blk true;
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\\}
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, .{ .simple = .bool }, .{ .simple = .bool_true });
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try testExpr(
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\\blk: {
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\\ break :blk 3;
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\\}
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, .{ .simple = .comptime_int }, .{ .int_u64_value = 3 });
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}
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test "ComptimeInterpreter - if" {
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try testExpr(
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\\blk: {
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\\ break :blk if (true) true else false;
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\\}
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, .{ .simple = .bool }, .{ .simple = .bool_true });
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try testExpr(
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\\blk: {
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\\ break :blk if (false) true else false;
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\\}
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, .{ .simple = .bool }, .{ .simple = .bool_false });
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}
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test "ComptimeInterpreter - variable lookup" {
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try testExpr(
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\\blk: {
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\\ var foo = 1;
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\\ var bar = 2;
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\\ var baz = 3;
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\\ break :blk bar;
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\\}
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, .{ .simple = .comptime_int }, .{ .int_u64_value = 2 });
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}
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test "ComptimeInterpreter - field access" {
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try testExpr(
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\\blk: {
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\\ const foo: struct {alpha: u64, beta: bool} = undefined;
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\\ break :blk foo.beta;
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\\}
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, .{ .simple = .bool }, null);
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}
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test "ComptimeInterpreter - pointer operations" {
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if (true) return error.SkipZigTest; // TODO
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try testExpr(
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\\blk: {
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\\ const foo: []const u8 = "";
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\\ break :blk foo.len;
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\\}
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, .{ .simple = .usize }, .{ .bytes = "" });
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try testExpr(
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\\blk: {
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\\ const foo = true;
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\\ break :blk &foo;
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\\}
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, @panic("TODO"), .{ .simple = .bool_true });
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try testExpr(
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\\blk: {
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\\ const foo = true;
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\\ const bar = &foo;
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\\ break :blk bar.*;
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\\}
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, @panic("TODO"), .{ .simple = .bool_true });
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}
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test "ComptimeInterpreter - call return primitive type" {
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try testCall(
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\\pub fn Foo() type {
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\\ return bool;
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\\}
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, &.{}, .{ .simple = .bool });
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try testCall(
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\\pub fn Foo() type {
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\\ return u32;
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\\}
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, &.{}, .{ .int_type = .{ .signedness = .unsigned, .bits = 32 } });
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try testCall(
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\\pub fn Foo() type {
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\\ return i128;
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\\}
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, &.{}, .{ .int_type = .{ .signedness = .signed, .bits = 128 } });
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try testCall(
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\\pub fn Foo() type {
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\\ const alpha = i128;
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\\ return alpha;
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\\}
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, &.{}, .{ .int_type = .{ .signedness = .signed, .bits = 128 } });
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}
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test "ComptimeInterpreter - call return struct" {
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var context = try Context.init(
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\\pub fn Foo() type {
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\\ return struct {
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\\ slay: bool,
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\\ var abc = 123;
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\\ };
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\\}
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);
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defer context.deinit();
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const result = try context.call(context.findFn("Foo"), &.{});
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try std.testing.expect(result.ty == .simple);
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try std.testing.expect(result.ty.simple == .type);
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const struct_info = result.val.?.struct_type;
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try std.testing.expectEqual(Index.none, struct_info.backing_int_ty);
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try std.testing.expectEqual(std.builtin.Type.ContainerLayout.Auto, struct_info.layout);
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const field_name = context.interpreter.ip.indexToKey(struct_info.fields[0].name).bytes;
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const bool_type = try context.interpreter.ip.get(allocator, .{ .simple = .bool });
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try std.testing.expectEqual(@as(usize, 1), struct_info.fields.len);
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try std.testing.expectEqualStrings("slay", field_name);
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try std.testing.expect(struct_info.fields[0].ty == bool_type);
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}
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test "ComptimeInterpreter - call comptime argument" {
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var context = try Context.init(
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\\pub fn Foo(comptime my_arg: bool) type {
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\\ var abc = z: {break :z if (!my_arg) 123 else 0;};
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\\ if (abc == 123) return u69;
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\\ return u8;
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\\}
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);
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defer context.deinit();
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const result1 = try context.call(context.findFn("Foo"), &.{KV{
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.ty = .{ .simple = .bool },
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.val = .{ .simple = .bool_true },
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}});
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try std.testing.expect(result1.ty == .simple);
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try std.testing.expect(result1.ty.simple == .type);
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try std.testing.expectEqual(Key{ .int_type = .{ .signedness = .unsigned, .bits = 8 } }, result1.val.?);
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var result2 = try context.call(context.findFn("Foo"), &.{KV{
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.ty = .{ .simple = .bool },
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.val = .{ .simple = .bool_false },
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}});
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try std.testing.expect(result2.ty == .simple);
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try std.testing.expect(result2.ty.simple == .type);
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try std.testing.expectEqual(Key{ .int_type = .{ .signedness = .unsigned, .bits = 69 } }, result2.val.?);
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}
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//
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// Helper functions
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//
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const KV = struct {
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ty: Key,
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val: ?Key,
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};
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const Context = struct {
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config: *zls.Config,
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document_store: *zls.DocumentStore,
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interpreter: *ComptimeInterpreter,
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pub fn init(source: []const u8) !Context {
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var config = try allocator.create(zls.Config);
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errdefer allocator.destroy(config);
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var document_store = try allocator.create(zls.DocumentStore);
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errdefer allocator.destroy(document_store);
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var interpreter = try allocator.create(ComptimeInterpreter);
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errdefer allocator.destroy(interpreter);
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config.* = .{};
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document_store.* = .{
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.allocator = allocator,
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.config = config,
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};
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errdefer document_store.deinit();
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const test_uri: []const u8 = switch (builtin.os.tag) {
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.windows => "file:///C:\\test.zig",
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else => "file:///test.zig",
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};
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const handle = try document_store.openDocument(test_uri, source);
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interpreter.* = .{
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.allocator = allocator,
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.document_store = document_store,
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.uri = handle.uri,
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};
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errdefer interpreter.deinit();
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_ = try interpretReportErrors(interpreter, 0, .none);
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return .{
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.config = config,
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.document_store = document_store,
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.interpreter = interpreter,
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};
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}
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pub fn deinit(self: *Context) void {
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self.interpreter.deinit();
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self.document_store.deinit();
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allocator.destroy(self.config);
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allocator.destroy(self.document_store);
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allocator.destroy(self.interpreter);
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}
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pub fn call(self: *Context, func_node: Ast.Node.Index, arguments: []const KV) !KV {
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var args = try allocator.alloc(ComptimeInterpreter.Value, arguments.len);
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defer allocator.free(args);
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for (arguments) |argument, i| {
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args[i] = .{
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.interpreter = self.interpreter,
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.node_idx = 0,
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.ty = try self.interpreter.ip.get(self.interpreter.allocator, argument.ty),
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.val = if (argument.val) |val| try self.interpreter.ip.get(self.interpreter.allocator, val) else .none,
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};
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}
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const namespace = @intToEnum(ComptimeInterpreter.NamespaceIndex, 0); // root namespace
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const result = (try self.interpreter.call(namespace, func_node, args, .{})).result;
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try std.testing.expect(result == .value);
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try std.testing.expect(result.value.ty != .none);
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return KV{
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.ty = self.interpreter.ip.indexToKey(result.value.ty),
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.val = if (result.value.val == .none) null else self.interpreter.ip.indexToKey(result.value.val),
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};
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}
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pub fn interpret(self: *Context, node: Ast.Node.Index) !KV {
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const namespace = @intToEnum(ComptimeInterpreter.NamespaceIndex, 0); // root namespace
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const result = try (try self.interpreter.interpret(node, namespace, .{})).getValue();
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try std.testing.expect(result.ty != .none);
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return KV{
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.ty = self.interpreter.ip.indexToKey(result.ty),
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.val = if (result.val == .none) null else self.interpreter.ip.indexToKey(result.val),
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};
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}
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pub fn findFn(self: Context, name: []const u8) Ast.Node.Index {
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const handle = self.interpreter.getHandle();
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for (handle.tree.nodes.items(.tag)) |tag, i| {
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if (tag != .fn_decl) continue;
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const node = @intCast(Ast.Node.Index, i);
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var buffer: [1]Ast.Node.Index = undefined;
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const fn_decl = handle.tree.fullFnProto(&buffer, node).?;
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const fn_name = offsets.tokenToSlice(handle.tree, fn_decl.name_token.?);
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if (std.mem.eql(u8, fn_name, name)) return node;
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}
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std.debug.panic("failed to find function with name '{s}'", .{name});
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}
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pub fn findVar(self: Context, name: []const u8) Ast.Node.Index {
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const handle = self.interpreter.getHandle();
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var node: Ast.Node.Index = 0;
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while (node < handle.tree.nodes.len) : (node += 1) {
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const var_decl = handle.tree.fullVarDecl(node) orelse continue;
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const name_token = var_decl.ast.mut_token + 1;
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const var_name = offsets.tokenToSlice(handle.tree, name_token);
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if (std.mem.eql(u8, var_name, name)) return var_decl.ast.init_node;
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}
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std.debug.panic("failed to find var declaration with name '{s}'", .{name});
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}
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};
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fn testCall(
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source: []const u8,
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arguments: []const KV,
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expected_ty: Key,
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) !void {
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var context = try Context.init(source);
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defer context.deinit();
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const result = try context.call(context.findFn("Foo"), arguments);
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try expectEqualKey(context.interpreter.ip, Key{ .simple = .type }, result.ty);
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try expectEqualKey(context.interpreter.ip, expected_ty, result.val);
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}
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fn testExpr(
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expr: []const u8,
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expected_ty: Key,
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expected_val: ?Key,
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) !void {
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const source = try std.fmt.allocPrint(allocator,
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\\const foobarbaz = {s};
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, .{expr});
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defer allocator.free(source);
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var context = try Context.init(source);
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defer context.deinit();
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const result = try context.interpret(context.findVar("foobarbaz"));
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try expectEqualKey(context.interpreter.ip, expected_ty, result.ty);
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if (expected_val) |expected| {
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try expectEqualKey(context.interpreter.ip, expected, result.val);
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}
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}
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/// TODO refactor this code
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fn expectEqualKey(ip: InternPool, expected: Key, actual: ?Key) !void {
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if (actual) |actual_key| {
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if (expected.eql(actual_key)) return;
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if (expected.isType() and actual_key.isType()) {
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std.debug.print("expected type `{}`, found type `{}`\n", .{ expected.fmtType(ip), actual_key.fmtType(ip) });
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} else if (expected.isType()) {
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std.debug.print("expected type `{}`, found value ({})\n", .{ expected.fmtType(ip), actual_key });
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} else if (actual_key.isType()) {
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std.debug.print("expected value ({}), found type `{}`\n", .{ expected, actual_key.fmtType(ip) });
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} else {
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std.debug.print("expected value ({}), found value ({})\n", .{ expected, actual_key }); // TODO print value
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}
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} else {
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if (expected.isType()) {
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std.debug.print("expected type `{}`, found null\n", .{expected.fmtType(ip)});
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} else {
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std.debug.print("expected value ({}), found null\n", .{expected});
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}
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}
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return error.TestExpectedEqual;
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}
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fn interpretReportErrors(
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interpreter: *ComptimeInterpreter,
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node_idx: Ast.Node.Index,
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namespace: InternPool.NamespaceIndex,
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) !ComptimeInterpreter.InterpretResult {
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const result = interpreter.interpret(node_idx, namespace, .{});
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// TODO use ErrorBuilder
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var err_it = interpreter.errors.iterator();
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if (interpreter.errors.count() != 0) {
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const handle = interpreter.getHandle();
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std.debug.print("\n{s}\n", .{handle.text});
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while (err_it.next()) |entry| {
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const token = handle.tree.firstToken(entry.key_ptr.*);
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const position = offsets.tokenToPosition(handle.tree, token, .@"utf-8");
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std.debug.print("{d}:{d}: {s}\n", .{ position.line, position.character, entry.value_ptr.message });
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}
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}
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return result;
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}
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