rework parser and lexer

.gitignore

@@ -1,2 +1,3 @@
 zig-cache
 zig-out
+nat

build.zig

@@ -28,6 +28,11 @@ pub fn build(b: *std.Build) void {
     // standard location when the user invokes the "install" step (the default
     // step when running `zig build`).
     b.installArtifact(exe);
+    b.installDirectory(.{
+        .source_dir = std.Build.LazyPath.relative("lib"),
+        .install_dir = .bin,
+        .install_subdir = "lib",
+    });
 
     // This *creates* a Run step in the build graph, to be executed when another
     // step is evaluated that depends on it. The next line below will establish
@@ -62,6 +67,13 @@ pub fn build(b: *std.Build) void {
 
     const run_unit_tests = b.addRunArtifact(unit_tests);
 
+    const debug_unit_tests_cmd = b.addSystemCommand(&.{"gf2"});
+    debug_unit_tests_cmd.addArtifactArg(unit_tests);
+    debug_unit_tests_cmd.addArgs(&.{ "-ex", "r" });
+
+    const debug_test_step = b.step("debug_test", "Run the tests through the debugger");
+    debug_test_step.dependOn(&debug_unit_tests_cmd.step);
+
     // Similar to creating the run step earlier, this exposes a `test` step to
     // the `zig build --help` menu, providing a way for the user to request
     // running the unit tests.

lib/std/start.nat

@@ -0,0 +1 @@
+const builtin = #import("builtin");

lib/std/std.nat

@@ -0,0 +1,4 @@
+const start = #import("start.nat");
+comptime {
+    _ = start;
+}

src/Compilation.zig

@@ -0,0 +1,300 @@
+const Compilation = @This();
+
+const std = @import("std");
+const assert = std.debug.assert;
+const print = std.debug.print;
+
+const Allocator = std.mem.Allocator;
+
+const data_structures = @import("data_structures.zig");
+const ArrayList = data_structures.ArrayList;
+const StringHashMap = data_structures.StringHashMap;
+const StringArrayHashMap = data_structures.StringArrayHashMap;
+
+const lexical_analyzer = @import("frontend/lexical_analyzer.zig");
+const syntactic_analyzer = @import("frontend/syntactic_analyzer.zig");
+const semantic_analyzer = @import("frontend/semantic_analyzer.zig");
+
+base_allocator: Allocator,
+cwd_absolute_path: []const u8,
+directory_absolute_path: []const u8,
+executable_absolute_path: []const u8,
+build_directory: std.fs.Dir,
+
+const cache_dir_name = "cache";
+const installation_dir_name = "installation";
+
+pub fn init(allocator: Allocator) !*Compilation {
+    const compilation: *Compilation = try allocator.create(Compilation);
+
+    const self_exe_path = try std.fs.selfExePathAlloc(allocator);
+    const self_exe_dir_path = std.fs.path.dirname(self_exe_path).?;
+    compilation.* = .{
+        .base_allocator = allocator,
+        .cwd_absolute_path = try realpathAlloc(allocator, "."),
+        .executable_absolute_path = self_exe_path,
+        .directory_absolute_path = self_exe_dir_path,
+        .build_directory = try std.fs.cwd().makeOpenPath("nat", .{}),
+    };
+
+    try compilation.build_directory.makePath(cache_dir_name);
+    try compilation.build_directory.makePath(installation_dir_name);
+
+    return compilation;
+}
+
+pub fn deinit(compilation: *Compilation) void {
+    const allocator = compilation.base_allocator;
+    allocator.free(compilation.cwd_absolute_path);
+    allocator.free(compilation.executable_absolute_path);
+    allocator.destroy(compilation);
+}
+
+pub const Module = struct {
+    main_package: *Package,
+    import_table: StringArrayHashMap(*File) = .{},
+
+    pub const Descriptor = struct {
+        main_package_path: []const u8,
+    };
+
+    fn deinit(module: *Module, allocator: Allocator) void {
+        defer allocator.destroy(module);
+
+        for (module.import_table.values()) |file| {
+            file.deinit(allocator);
+        }
+
+        var iterator = module.main_package.dependencies.valueIterator();
+        while (iterator.next()) |it| {
+            const package = it.*;
+            package.deinit(allocator);
+        }
+
+        module.main_package.deinit(allocator);
+
+        module.import_table.clearAndFree(allocator);
+    }
+
+    fn importPackage(module: *Module, compilation: *Compilation, package: *Package) !ImportPackageResult {
+        const lookup_result = try module.import_table.getOrPut(compilation.base_allocator, package.directory.path);
+        errdefer _ = module.import_table.pop();
+        if (lookup_result.found_existing) {
+            const file: *File = lookup_result.value_ptr.*;
+            try file.addPackageReference(compilation.base_allocator, package);
+            unreachable;
+        }
+        const file = try compilation.base_allocator.create(File);
+        lookup_result.value_ptr.* = file;
+        file.* = File{
+            .relative_path = package.source_path,
+            .package = package,
+        };
+        try file.addPackageReference(compilation.base_allocator, package);
+
+        return .{
+            .file = file,
+            .is_new = true,
+        };
+    }
+
+    fn generateAbstractSyntaxTreeForFile(module: *Module, allocator: Allocator, file: *File) !void {
+        _ = module;
+        const source_file = try file.package.directory.handle.openFile(file.relative_path, .{});
+        defer source_file.close();
+
+        const file_size = try source_file.getEndPos();
+        var file_buffer = try allocator.alloc(u8, file_size);
+
+        const read_byte_count = try source_file.readAll(file_buffer);
+        assert(read_byte_count == file_size);
+
+        //TODO: adjust file maximum size
+        file.source_code = file_buffer[0..read_byte_count];
+        file.status = .loaded_into_memory;
+
+        try file.lex(allocator);
+        try file.parse(allocator);
+    }
+};
+
+fn pathFromCwd(compilation: *const Compilation, relative_path: []const u8) ![]const u8 {
+    return std.fs.path.join(compilation.base_allocator, &.{ compilation.cwd_absolute_path, relative_path });
+}
+
+fn pathFromCompiler(compilation: *const Compilation, relative_path: []const u8) ![]const u8 {
+    return std.fs.path.join(compilation.base_allocator, &.{ compilation.directory_absolute_path, relative_path });
+}
+
+fn realpathAlloc(allocator: Allocator, pathname: []const u8) ![]const u8 {
+    var path_buffer: [std.fs.MAX_PATH_BYTES]u8 = undefined;
+    const realpathInStack = try std.os.realpath(pathname, &path_buffer);
+    return allocator.dupe(u8, realpathInStack);
+}
+
+pub fn compileModule(compilation: *Compilation, descriptor: Module.Descriptor) !void {
+    // TODO: generate an actual file
+    const builtin_file_name = "builtin.nat";
+    var cache_dir = try compilation.build_directory.openDir("cache", .{});
+    const builtin_file = try cache_dir.createFile(builtin_file_name, .{ .truncate = false });
+    builtin_file.close();
+
+    const module: *Module = try compilation.base_allocator.create(Module);
+    defer module.deinit(compilation.base_allocator);
+    module.* = Module{
+        .main_package = blk: {
+            const result = try compilation.base_allocator.create(Package);
+            const main_package_absolute_directory_path = try compilation.pathFromCwd(std.fs.path.dirname(descriptor.main_package_path).?);
+            result.* = .{
+                .directory = .{
+                    .handle = try std.fs.openDirAbsolute(main_package_absolute_directory_path, .{}),
+                    .path = main_package_absolute_directory_path,
+                },
+                .source_path = try compilation.base_allocator.dupe(u8, std.fs.path.basename(descriptor.main_package_path)),
+            };
+            break :blk result;
+        },
+    };
+
+    const std_package_dir = "lib/std";
+    const package_descriptors = [2]struct {
+        name: []const u8,
+        directory_path: []const u8,
+    }{
+        .{
+            .name = "std",
+            .directory_path = try switch (@import("builtin").is_test) {
+                true => compilation.pathFromCwd(std_package_dir),
+                false => compilation.pathFromCompiler(std_package_dir),
+            },
+        },
+        .{
+            .name = "builtin",
+            .directory_path = blk: {
+                const result = try cache_dir.realpathAlloc(compilation.base_allocator, ".");
+                cache_dir.close();
+                break :blk result;
+            },
+        },
+    };
+
+    for (package_descriptors) |package_descriptor| {
+        const package = try compilation.base_allocator.create(Package);
+        package.* = .{
+            .directory = .{
+                .path = package_descriptor.directory_path,
+                .handle = try std.fs.openDirAbsolute(package_descriptor.directory_path, .{}),
+            },
+            .source_path = try std.mem.concat(compilation.base_allocator, u8, &.{ package_descriptor.name, ".nat" }),
+        };
+
+        try module.main_package.addDependency(compilation.base_allocator, package_descriptor.name, package);
+    }
+
+    assert(module.main_package.dependencies.size == 2);
+
+    _ = try module.importPackage(compilation, module.main_package.dependencies.get("std").?);
+
+    for (module.import_table.values()) |import| {
+        try module.generateAbstractSyntaxTreeForFile(compilation.base_allocator, import);
+    }
+}
+
+const ImportPackageResult = struct {
+    file: *File,
+    is_new: bool,
+};
+
+fn generateAST() !void {}
+
+pub const Directory = struct {
+    handle: std.fs.Dir,
+    path: []const u8,
+};
+
+pub const Package = struct {
+    directory: Directory,
+    /// Relative to the package main directory
+    source_path: []const u8,
+    dependencies: StringHashMap(*Package) = .{},
+
+    fn addDependency(package: *Package, allocator: Allocator, package_name: []const u8, new_dependency: *Package) !void {
+        try package.dependencies.ensureUnusedCapacity(allocator, 1);
+        package.dependencies.putAssumeCapacityNoClobber(package_name, new_dependency);
+    }
+
+    fn deinit(package: *Package, allocator: Allocator) void {
+        if (package.dependencies.size > 0) {
+            assert(package.dependencies.size == 2);
+        }
+        package.dependencies.clearAndFree(allocator);
+        allocator.free(package.source_path);
+        allocator.free(package.directory.path);
+        package.directory.handle.close();
+        allocator.destroy(package);
+    }
+};
+
+pub const File = struct {
+    status: Status = .not_loaded,
+    source_code: []const u8 = &.{},
+    lexical_analyzer_result: lexical_analyzer.Result = undefined,
+    syntactic_analyzer_result: syntactic_analyzer.Result = undefined,
+    package_references: ArrayList(*Package) = .{},
+    relative_path: []const u8,
+    package: *Package,
+
+    const Status = enum {
+        not_loaded,
+        loaded_into_memory,
+        lexed,
+        parsed,
+    };
+
+    fn addPackageReference(file: *File, allocator: Allocator, package: *Package) !void {
+        for (file.package_references.items) |other| {
+            if (other == package) return;
+        }
+
+        try file.package_references.insert(allocator, 0, package);
+    }
+
+    pub fn fromRelativePath(allocator: Allocator, file_relative_path: []const u8) *File {
+        const file_content = try std.fs.cwd().readFileAlloc(allocator, file_relative_path, std.math.maxInt(usize));
+        _ = file_content;
+        const file = try allocator.create(File);
+        file.* = File{};
+
+        return file;
+    }
+
+    fn lex(file: *File, allocator: Allocator) !void {
+        assert(file.status == .loaded_into_memory);
+        file.lexical_analyzer_result = try lexical_analyzer.analyze(allocator, file.source_code);
+        if (!@import("builtin").is_test) {
+            print("[LEXICAL ANALYSIS] {} ns\n", .{file.lexical_analyzer_result.time});
+        }
+        file.status = .lexed;
+    }
+
+    fn parse(file: *File, allocator: Allocator) !void {
+        assert(file.status == .lexed);
+        file.syntactic_analyzer_result = try syntactic_analyzer.analyze(allocator, file.lexical_analyzer_result.tokens.items, file.source_code);
+        if (!@import("builtin").is_test) {
+            print("[SYNTACTIC ANALYSIS] {} ns\n", .{file.syntactic_analyzer_result.time});
+        }
+        file.status = .parsed;
+    }
+
+    fn deinit(file: *File, allocator: Allocator) void {
+        defer allocator.destroy(file);
+        if (file.status == .parsed) {
+            file.syntactic_analyzer_result.free(allocator);
+            file.lexical_analyzer_result.free(allocator);
+            file.package_references.clearAndFree(allocator);
+            allocator.free(file.source_code);
+        } else {
+            unreachable;
+        }
+    }
+};

src/compiler.zig

@@ -1,21 +0,0 @@
-const std = @import("std");
-
-const Allocator = std.mem.Allocator;
-
-const data_structures = @import("data_structures.zig");
-
-const lexer = @import("lexer.zig");
-const parser = @import("parser.zig");
-
-test {
-    _ = lexer;
-    _ = parser;
-}
-
-pub fn cycle(allocator: Allocator, file_relative_path: []const u8) !void {
-    const file = try std.fs.cwd().readFileAlloc(allocator, file_relative_path, std.math.maxInt(usize));
-    std.debug.print("File:\n\n```\n{s}\n```\n", .{file});
-    const lexer_result = try lexer.lex(allocator, file);
-    const parser_result = try parser.parse(allocator, &lexer_result);
-    _ = parser_result;
-}

src/data_structures.zig

@@ -1,4 +1,7 @@
 const std = @import("std");
 
+pub const Allocator = std.mem.Allocator;
 pub const ArrayList = std.ArrayListUnmanaged;
-pub const HashMap = std.AutoHashMap;
+pub const HashMap = std.AutoHashMapUnmanaged;
+pub const StringHashMap = std.StringHashMapUnmanaged;
+pub const StringArrayHashMap = std.StringArrayHashMapUnmanaged;

src/frontend/lexical_analyzer.zig

@@ -0,0 +1,120 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const assert = std.debug.assert;
+const log = std.log;
+
+const equal = std.mem.eql;
+
+const data_structures = @import("../data_structures.zig");
+const ArrayList = data_structures.ArrayList;
+
+const Compilation = @import("../Compilation.zig");
+const fs = @import("../fs.zig");
+
+pub const Token = packed struct(u64) {
+    start: u32,
+    len: u24,
+    id: Id,
+
+    pub const Id = enum(u8) {
+        identifier = 0,
+        number = 1,
+        string_literal = 2,
+        left_parenthesis = '(',
+        right_parenthesis = ')',
+        left_brace = '{',
+        right_brace = '}',
+        equal = '=',
+        colon = ':',
+        semicolon = ';',
+        hash = '#',
+        comma = ',',
+        bang = '!',
+    };
+};
+
+pub const Result = struct {
+    tokens: ArrayList(Token),
+    time: u64,
+
+    pub fn free(result: *Result, allocator: Allocator) void {
+        result.tokens.clearAndFree(allocator);
+    }
+};
+
+pub fn analyze(allocator: Allocator, text: []const u8) !Result {
+    const time_start = std.time.Instant.now() catch unreachable;
+    var tokens = try ArrayList(Token).initCapacity(allocator, text.len / 8);
+    var index: usize = 0;
+
+    while (index < text.len) {
+        const start_index = index;
+        const start_character = text[index];
+        const token_id: Token.Id = switch (start_character) {
+            'a'...'z', 'A'...'Z', '_' => blk: {
+                while (true) {
+                    const ch = text[index];
+                    if ((ch >= 'a' and ch <= 'z') or (ch >= 'A' and ch <= 'Z') or ch == '_' or (ch >= '0' and ch <= '9')) {
+                        index += 1;
+                        continue;
+                    }
+
+                    break;
+                }
+
+                break :blk .identifier;
+            },
+            '(', ')', '{', '}', '-', '=', ';', '#' => |operator| blk: {
+                index += 1;
+                break :blk @enumFromInt(operator);
+            },
+            '0'...'9' => blk: {
+                while (text[index] >= '0' and text[index] <= '9') {
+                    index += 1;
+                }
+
+                break :blk .number;
+            },
+            '"' => blk: {
+                index += 1;
+                while (text[index] != '"') {
+                    index += 1;
+                }
+
+                index += 1;
+
+                break :blk .string_literal;
+            },
+            ' ', '\n', '\r', '\t' => {
+                index += 1;
+                continue;
+            },
+            else => |foo| {
+                std.debug.panic("NI: '{c}'", .{foo});
+            },
+        };
+
+        const end_index = index;
+
+        try tokens.append(allocator, .{
+            .start = @intCast(start_index),
+            .len = @intCast(end_index - start_index),
+            .id = token_id,
+        });
+    }
+
+    const should_log = false;
+    if (should_log) {
+        for (tokens.items, 0..) |token, i| {
+            std.debug.print("#{} {s}\n", .{ i, @tagName(token.id) });
+        }
+    }
+
+    const time_end = std.time.Instant.now() catch unreachable;
+    const time = time_end.since(time_start);
+
+    return .{
+        .tokens = tokens,
+        .time = time,
+    };
+}

src/frontend/syntactic_analyzer.zig

@@ -0,0 +1,474 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const assert = std.debug.assert;
+const equal = std.mem.eql;
+const log = std.log;
+
+const data_structures = @import("../data_structures.zig");
+const ArrayList = data_structures.ArrayList;
+const HashMap = data_structures.HashMap;
+
+const lexical_analyzer = @import("lexical_analyzer.zig");
+const Token = lexical_analyzer.Token;
+
+pub const Result = struct {
+    nodes: ArrayList(Node),
+    time: u64,
+
+    pub fn free(result: *Result, allocator: Allocator) void {
+        result.nodes.clearAndFree(allocator);
+    }
+};
+
+pub const Node = packed struct(u96) {
+    token: u32,
+    id: Id,
+    left: Node.Index,
+    right: Node.Index,
+
+    pub const Index = u27;
+
+    pub const Range = struct {
+        start: u32,
+        end: u32,
+    };
+
+    pub const Id = enum(u10) {
+        main = 0,
+        identifier = 1,
+        number = 2,
+        @"return" = 3,
+        block_one = 4,
+        function_declaration_no_arguments = 5,
+        container_declaration = 6,
+        string_literal = 7,
+        compiler_intrinsic_one = 8,
+        simple_variable_declaration = 9,
+        assign = 10,
+        @"comptime" = 11,
+    };
+};
+
+const Error = error{
+    unexpected_token,
+    not_implemented,
+    OutOfMemory,
+};
+
+const Analyzer = struct {
+    tokens: []const Token,
+    token_i: u32 = 0,
+    nodes: ArrayList(Node) = .{},
+    file: []const u8,
+    allocator: Allocator,
+    temporal_node_heap: ArrayList(Node.Index) = .{},
+
+    fn free(analyzer: *Analyzer) void {
+        _ = analyzer;
+    }
+
+    fn expectToken(analyzer: *Analyzer, token_id: Token.Id) !u32 {
+        if (analyzer.tokens[analyzer.token_i].id == token_id) {
+            const result = analyzer.token_i;
+            analyzer.token_i += 1;
+            return result;
+        } else {
+            return error.unexpected_token;
+        }
+    }
+
+    fn getIdentifier(analyzer: *const Analyzer, token: Token) []const u8 {
+        assert(token.id == .identifier);
+        const identifier = analyzer.file[token.start..][0..token.len];
+        return identifier;
+    }
+
+    fn containerMembers(analyzer: *Analyzer) !Members {
+        const node_heap_top = analyzer.temporal_node_heap.items.len;
+        defer analyzer.temporal_node_heap.shrinkRetainingCapacity(node_heap_top);
+
+        while (analyzer.token_i < analyzer.tokens.len) {
+            const first = analyzer.token_i;
+            const member_node: Node = switch (analyzer.tokens[first].id) {
+                .identifier => blk: {
+                    const first_identifier_token = analyzer.tokens[first];
+                    analyzer.token_i += 1;
+
+                    const identifier = analyzer.getIdentifier(first_identifier_token);
+
+                    if (equal(u8, identifier, "comptime")) {
+                        switch (analyzer.tokens[analyzer.token_i].id) {
+                            .left_brace => {
+                                const comptime_block = try analyzer.block();
+
+                                break :blk .{
+                                    .id = .@"comptime",
+                                    .token = first,
+                                    .left = comptime_block,
+                                    .right = 0,
+                                };
+                            },
+                            else => |foo| std.debug.panic("NI: {s}", .{@tagName(foo)}),
+                        }
+                    } else {
+                        const is_const = equal(u8, identifier, "const");
+                        const is_var = equal(u8, identifier, "var");
+                        assert(is_const or is_var);
+
+                        _ = try analyzer.expectToken(.identifier);
+
+                        // TODO: type
+                        _ = try analyzer.expectToken(.equal);
+
+                        // TODO: do this in a function
+                        const init_node = switch (analyzer.tokens[analyzer.token_i].id) {
+                            .identifier => unreachable,
+                            .hash => try analyzer.compilerIntrinsic(),
+                            else => |t| std.debug.panic("NI: {s}", .{@tagName(t)}),
+                        };
+
+                        _ = try analyzer.expectToken(.semicolon);
+
+                        // TODO:
+                        const type_node = 0;
+                        const top_level_decl = .{
+                            .id = .simple_variable_declaration,
+                            .token = first,
+                            .left = type_node,
+                            .right = init_node,
+                        };
+
+                        break :blk top_level_decl;
+                    }
+                },
+                else => |t| std.debug.panic("NI: {s}", .{@tagName(t)}),
+            };
+
+            const member_index = try analyzer.addNode(member_node);
+            try analyzer.temporal_node_heap.append(analyzer.allocator, member_index);
+        }
+
+        const members_array = analyzer.temporal_node_heap.items[node_heap_top..];
+        const members: Members = switch (members_array.len) {
+            2 => .{
+                .len = 2,
+                .left = members_array[0],
+                .right = members_array[1],
+            },
+            else => |len| std.debug.panic("Len: {}", .{len}),
+        };
+
+        return members;
+    }
+
+    fn block(analyzer: *Analyzer) !Node.Index {
+        const left_brace = try analyzer.expectToken(.left_brace);
+        const node_heap_top = analyzer.temporal_node_heap.items.len;
+        defer analyzer.temporal_node_heap.shrinkRetainingCapacity(node_heap_top);
+
+        while (analyzer.tokens[analyzer.token_i].id != .right_brace) {
+            const statement_index = try analyzer.statement();
+            try analyzer.temporal_node_heap.append(analyzer.allocator, statement_index);
+        }
+        _ = try analyzer.expectToken(.right_brace);
+
+        const statement_array = analyzer.temporal_node_heap.items[node_heap_top..];
+        const node: Node = switch (statement_array.len) {
+            1 => .{
+                .id = .block_one,
+                .token = left_brace,
+                .left = statement_array[0],
+                .right = 0,
+            },
+            else => |len| std.debug.panic("len: {}", .{len}),
+        };
+        return analyzer.addNode(node);
+    }
+
+    fn statement(analyzer: *Analyzer) !Node.Index {
+        // TODO: more stuff before
+        const result = try analyzer.assignExpression();
+        _ = try analyzer.expectToken(.semicolon);
+
+        return result;
+    }
+
+    fn assignExpression(analyzer: *Analyzer) !Node.Index {
+        const expr = try analyzer.expression();
+        const expression_id: Node.Id = switch (analyzer.tokens[analyzer.token_i].id) {
+            .semicolon => return expr,
+            .equal => .assign,
+            else => unreachable,
+        };
+
+        return analyzer.addNode(.{
+            .id = expression_id,
+            .token = blk: {
+                const token_i = analyzer.token_i;
+                analyzer.token_i += 1;
+                break :blk token_i;
+            },
+            .left = expr,
+            .right = try analyzer.expression(),
+        });
+    }
+
+    fn compilerIntrinsic(analyzer: *Analyzer) !Node.Index {
+        const hash = try analyzer.expectToken(.hash);
+        _ = try analyzer.expectToken(.identifier);
+        _ = try analyzer.expectToken(.left_parenthesis);
+
+        const temporal_heap_top = analyzer.temporal_node_heap.items.len;
+        defer analyzer.temporal_node_heap.shrinkRetainingCapacity(temporal_heap_top);
+
+        while (analyzer.tokens[analyzer.token_i].id != .right_parenthesis) {
+            const parameter = try analyzer.expression();
+            try analyzer.temporal_node_heap.append(analyzer.allocator, parameter);
+
+            switch (analyzer.tokens[analyzer.token_i].id) {
+                .comma => analyzer.token_i += 1,
+                .right_parenthesis => continue,
+                else => unreachable,
+            }
+        }
+
+        // Consume the right parenthesis
+        analyzer.token_i += 1;
+
+        const parameters = analyzer.temporal_node_heap.items[temporal_heap_top..];
+
+        return switch (parameters.len) {
+            1 => analyzer.addNode(.{
+                .id = .compiler_intrinsic_one,
+                .token = hash,
+                .left = parameters[0],
+                .right = 0,
+            }),
+            else => unreachable,
+        };
+    }
+
+    fn expression(analyzer: *Analyzer) !Node.Index {
+        return analyzer.expressionPrecedence(0);
+    }
+
+    fn expressionPrecedence(analyzer: *Analyzer, minimum_precedence: i32) !Node.Index {
+        var result = try analyzer.prefixExpression();
+
+        var banned_precedence: i32 = -1;
+
+        while (analyzer.token_i < analyzer.tokens.len) {
+            const precedence: i32 = switch (analyzer.tokens[analyzer.token_i].id) {
+                .equal, .semicolon, .right_parenthesis => -1,
+                else => |foo| std.debug.panic("Foo: ({s}) {}", .{ @tagName(foo), foo }),
+            };
+
+            if (precedence < minimum_precedence) {
+                break;
+            }
+
+            if (precedence == banned_precedence) {
+                break;
+            }
+
+            // TODO: fix this
+            const node_index = try analyzer.expressionPrecedence(1);
+            _ = node_index;
+            unreachable;
+        }
+
+        return result;
+    }
+
+    fn prefixExpression(analyzer: *Analyzer) !Node.Index {
+        switch (analyzer.tokens[analyzer.token_i].id) {
+            // .bang => .bool_not,
+            // .minus => .negation,
+            // .tilde => .bit_not,
+            // .minus_percent => .negation_wrap,
+            // .ampersand => .address_of,
+            // .keyword_try => .@"try",
+            // .keyword_await => .@"await",
+
+            else => |pref| {
+                _ = pref;
+                return analyzer.primaryExpression();
+            },
+        }
+
+        return error.not_implemented;
+    }
+
+    fn primaryExpression(analyzer: *Analyzer) !Node.Index {
+        const result = switch (analyzer.tokens[analyzer.token_i].id) {
+            .identifier => switch (analyzer.tokens[analyzer.token_i + 1].id) {
+                .colon => unreachable,
+                else => try analyzer.curlySuffixExpression(),
+            },
+            .string_literal => try analyzer.curlySuffixExpression(),
+            else => |id| {
+                log.warn("By default, calling curlySuffixExpression with {s}", .{@tagName(id)});
+                unreachable;
+            },
+        };
+
+        return result;
+    }
+
+    fn curlySuffixExpression(analyzer: *Analyzer) !Node.Index {
+        const left = try analyzer.typeExpression();
+
+        return switch (analyzer.tokens[analyzer.token_i].id) {
+            .left_brace => unreachable,
+            else => left,
+        };
+    }
+
+    fn typeExpression(analyzer: *Analyzer) !Node.Index {
+        return switch (analyzer.tokens[analyzer.token_i].id) {
+            .string_literal, .identifier => try analyzer.errorUnionExpression(),
+            else => |id| blk: {
+                log.warn("By default, calling errorUnionExpression with {s}", .{@tagName(id)});
+
+                const result = try analyzer.errorUnionExpression();
+
+                break :blk result;
+            },
+        };
+    }
+
+    fn errorUnionExpression(analyzer: *Analyzer) !Node.Index {
+        const suffix_expression = try analyzer.suffixExpression();
+
+        return switch (analyzer.tokens[analyzer.token_i].id) {
+            .bang => unreachable,
+            else => suffix_expression,
+        };
+    }
+
+    fn suffixExpression(analyzer: *Analyzer) !Node.Index {
+        var result = try analyzer.primaryTypeExpression();
+
+        while (true) {
+            if (analyzer.suffixOperator()) |_| {
+                unreachable;
+            } else {
+                if (analyzer.tokens[analyzer.token_i].id == .left_parenthesis) {
+                    unreachable;
+                } else {
+                    return result;
+                }
+            }
+        }
+
+        unreachable;
+    }
+
+    fn primaryTypeExpression(analyzer: *Analyzer) !Node.Index {
+        const token_i = analyzer.token_i;
+        return switch (analyzer.tokens[token_i].id) {
+            .string_literal => blk: {
+                analyzer.token_i += 1;
+                break :blk analyzer.addNode(.{
+                    .id = .string_literal,
+                    .token = token_i,
+                    .left = 0,
+                    .right = 0,
+                });
+            },
+            .identifier => switch (analyzer.tokens[token_i + 1].id) {
+                .colon => unreachable,
+                else => analyzer.addNode(.{
+                    .id = .identifier,
+                    .token = blk: {
+                        analyzer.token_i += 1;
+                        break :blk token_i;
+                    },
+                    .left = 0,
+                    .right = 0,
+                }),
+            },
+            else => |foo| {
+                switch (foo) {
+                    .identifier => std.debug.panic("{s}: {s}", .{ @tagName(foo), analyzer.getIdentifier(analyzer.tokens[token_i]) }),
+                    else => std.debug.panic("{s}", .{@tagName(foo)}),
+                }
+            },
+        };
+    }
+
+    // TODO:
+    fn suffixOperator(analyzer: *Analyzer) ?bool {
+        _ = analyzer;
+
+        return null;
+    }
+
+    fn addNode(analyzer: *Analyzer, node: Node) !Node.Index {
+        const index = analyzer.nodes.items.len;
+        try analyzer.nodes.append(analyzer.allocator, node);
+        return @intCast(index);
+    }
+};
+
+const Members = struct {
+    len: usize,
+    left: Node.Index,
+    right: Node.Index,
+
+    pub fn toRange(members: Members) Node.Range {
+        return switch (members.len) {
+            0 => unreachable,
+            1 => .{
+                .start = members.left,
+                .end = members.left,
+            },
+            2 => .{
+                .start = members.left,
+                .end = members.right,
+            },
+            else => unreachable,
+        };
+    }
+};
+
+pub fn analyze(allocator: Allocator, tokens: []const Token, file: []const u8) !Result {
+    const start = std.time.Instant.now() catch unreachable;
+    var analyzer = Analyzer{
+        .tokens = tokens,
+        .file = file,
+        .allocator = allocator,
+    };
+    errdefer analyzer.free();
+    const node_index = try analyzer.addNode(.{
+        .id = .main,
+        .token = 0,
+        .left = 0,
+        .right = 0,
+    });
+
+    assert(node_index == 0);
+    const members = try analyzer.containerMembers();
+    const member_range = members.toRange();
+    analyzer.nodes.items[0].left = @intCast(member_range.start);
+    analyzer.nodes.items[0].right = @intCast(member_range.end);
+
+    const end = std.time.Instant.now() catch unreachable;
+
+    analyzer.temporal_node_heap.clearAndFree(allocator);
+
+    return .{
+        .nodes = analyzer.nodes,
+        .time = end.since(start),
+    };
+}
+
+const ExpressionMutabilityQualifier = enum {
+    @"const",
+    @"var",
+};
+
+const Keyword = enum {
+    @"return",
+    @"fn",
+};

src/lexer.zig

@@ -1,158 +0,0 @@
-const std = @import("std");
-const Allocator = std.mem.Allocator;
-const assert = std.debug.assert;
-const log = std.log;
-
-const equal = std.mem.eql;
-
-const data_structures = @import("data_structures.zig");
-const ArrayList = data_structures.ArrayList;
-
-const fs = @import("fs.zig");
-const parser = @import("parser.zig");
-
-pub const TokenTypeMap = blk: {
-    var result: [@typeInfo(TokenId).Enum.fields.len]type = undefined;
-
-    result[@intFromEnum(TokenId.identifier)] = Identifier;
-    result[@intFromEnum(TokenId.operator)] = Operator;
-    result[@intFromEnum(TokenId.number)] = Number;
-
-    break :blk result;
-};
-
-pub const Identifier = parser.Node;
-
-pub const TokenId = enum {
-    identifier,
-    operator,
-    number,
-};
-
-pub const Operator = enum(u8) {
-    left_parenthesis = '(',
-    right_parenthesis = ')',
-    left_brace = '{',
-    right_brace = '}',
-    equal = '=',
-    colon = ':',
-    semicolon = ';',
-};
-
-pub const Number = struct {
-    content: union(enum) {
-        float: f64,
-        integer: Integer,
-    },
-
-    const Integer = struct {
-        value: u64,
-        is_negative: bool,
-    };
-};
-
-pub const Result = struct {
-    arrays: struct {
-        identifier: ArrayList(Identifier),
-        operator: ArrayList(Operator),
-        number: ArrayList(Number),
-        id: ArrayList(TokenId),
-    },
-    file: []const u8,
-    time: u64 = 0,
-
-    pub fn free(result: *Result, allocator: Allocator) void {
-        inline for (@typeInfo(@TypeOf(result.arrays)).Struct.fields) |field| {
-            @field(result.arrays, field.name).clearAndFree(allocator);
-        }
-    }
-
-    fn appendToken(result: *Result, comptime token_id: TokenId, token_value: TokenTypeMap[@intFromEnum(token_id)]) void {
-        // const index = result.arrays.id.items.len;
-        @field(result.arrays, @tagName(token_id)).appendAssumeCapacity(token_value);
-        result.arrays.id.appendAssumeCapacity(token_id);
-        // log.err("Token #{}: {s} {}", .{ index, @tagName(token_id), token_value });
-    }
-};
-
-pub fn lex(allocator: Allocator, text: []const u8) !Result {
-    const time_start = std.time.Instant.now() catch unreachable;
-
-    var index: usize = 0;
-
-    var result = Result{
-        .arrays = .{
-            .identifier = try ArrayList(Identifier).initCapacity(allocator, text.len),
-            .operator = try ArrayList(Operator).initCapacity(allocator, text.len),
-            .number = try ArrayList(Number).initCapacity(allocator, text.len),
-            .id = try ArrayList(TokenId).initCapacity(allocator, text.len),
-        },
-        .file = text,
-    };
-
-    defer {
-        const time_end = std.time.Instant.now() catch unreachable;
-        result.time = time_end.since(time_start);
-    }
-
-    while (index < text.len) {
-        const first_char = text[index];
-        switch (first_char) {
-            'a'...'z', 'A'...'Z', '_' => {
-                const start = index;
-                while (true) {
-                    const ch = text[index];
-                    if ((ch >= 'a' and ch <= 'z') or (ch >= 'A' and ch <= 'Z') or ch == '_' or (ch >= '0' and ch <= '9')) {
-                        index += 1;
-                        continue;
-                    }
-                    break;
-                }
-
-                result.appendToken(.identifier, .{
-                    .left = @intCast(start),
-                    .right = @intCast(index),
-                    .type = .identifier,
-                });
-            },
-            '(', ')', '{', '}', '-', '=', ';' => |operator| {
-                result.appendToken(.operator, @enumFromInt(operator));
-                index += 1;
-            },
-            '0'...'9' => {
-                const start = index;
-
-                while (text[index] >= '0' and text[index] <= '9') {
-                    index += 1;
-                }
-                const end = index;
-                const number_slice = text[start..end];
-                const number = try std.fmt.parseInt(u64, number_slice, 10);
-                result.appendToken(.number, .{
-                    .content = .{
-                        .integer = .{
-                            .value = number,
-                            .is_negative = false,
-                        },
-                    },
-                });
-            },
-            ' ', '\n', '\r', '\t' => index += 1,
-            else => |foo| {
-                index += 1;
-                std.debug.panic("NI: {c} 0x{x}", .{ foo, foo });
-            },
-        }
-    }
-
-    return result;
-}
-
-test "lexer" {
-    const allocator = std.testing.allocator;
-    const file_path = fs.first;
-    const file = try fs.readFile(allocator, file_path);
-    defer allocator.free(file);
-    var result = try lex(allocator, file);
-    defer result.free(allocator);
-}

src/main.zig

@@ -2,17 +2,28 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 
-const compiler = @import("compiler.zig");
+const Compilation = @import("Compilation.zig");
 const fs = @import("fs.zig");
 
 pub const seed = std.math.maxInt(u64);
+const default_src_file = "src/test/main.b";
 
 pub fn main() !void {
-    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
-    const allocator = gpa.allocator();
-    try compiler.cycle(allocator, fs.first);
+    try singleCompilation(default_src_file);
 }
 
-test {
-    _ = compiler;
+fn singleCompilation(main_file_path: []const u8) !void {
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+
+    const compilation = try Compilation.init(gpa.allocator());
+    defer compilation.deinit();
+
+    try compilation.compileModule(.{
+        .main_package_path = main_file_path,
+    });
+}
+
+test "basic" {
+    try singleCompilation(default_src_file);
 }

src/parser.zig

@@ -1,434 +0,0 @@
-const std = @import("std");
-const Allocator = std.mem.Allocator;
-const assert = std.debug.assert;
-const log = std.log;
-
-const data_structures = @import("data_structures.zig");
-const ArrayList = data_structures.ArrayList;
-const HashMap = data_structures.HashMap;
-
-const lexer = @import("lexer.zig");
-
-pub const Result = struct {
-    function_map: ArrayList(lexer.Identifier),
-    nodes: ArrayList(Node),
-
-    pub fn free(result: *Result, allocator: Allocator) void {
-        result.functions.clearAndFree(allocator);
-    }
-};
-
-pub const Node = packed struct(u64) {
-    type: Type,
-    left: Node.Index,
-    right: Node.Index,
-
-    pub const Index = u27;
-
-    pub const Type = enum(u10) {
-        root = 0,
-        identifier = 1,
-        number = 2,
-        @"return" = 3,
-        block_one = 4,
-        function_declaration_no_arguments = 5,
-        container_declaration = 6,
-    };
-};
-
-const Error = error{
-    unexpected_token,
-    not_implemented,
-    OutOfMemory,
-};
-
-pub fn parse(allocator: Allocator, lexer_result: *const lexer.Result) !Result {
-    var parser = Parser{
-        .allocator = allocator,
-        .nodes = ArrayList(Node){},
-        .function_map = ArrayList(lexer.Identifier){},
-        .lexer = .{
-            .result = lexer_result,
-        },
-    };
-    errdefer parser.free();
-
-    const node_index = try parser.appendNode(Node{
-        .type = .root,
-        .left = 0,
-        .right = 0,
-    });
-    _ = node_index;
-
-    const members = try parser.parseContainerMembers();
-    _ = members;
-
-    return Result{
-        .function_map = parser.function_map,
-        .nodes = parser.nodes,
-    };
-}
-
-const ExpressionMutabilityQualifier = enum {
-    @"const",
-    @"var",
-};
-
-const Keyword = enum {
-    @"return",
-    @"fn",
-};
-
-const PeekResult = union(lexer.TokenId) {
-    identifier: lexer.Identifier,
-    operator: lexer.Operator,
-    number: lexer.Number,
-};
-
-const Lexer = struct {
-    result: *const lexer.Result,
-    indices: struct {
-        identifier: u32 = 0,
-        operator: u32 = 0,
-        number: u32 = 0,
-        id: u32 = 0,
-    } = .{},
-
-    fn hasTokens(l: *const Lexer) bool {
-        return l.indices.id < l.result.arrays.id.items.len;
-    }
-
-    fn currentTokenIndex(l: *const Lexer, comptime token_id: lexer.TokenId) u32 {
-        assert(l.isCurrentToken(token_id));
-        return @field(l.indices, @tagName(token_id));
-    }
-
-    fn consume(l: *Lexer, comptime token_id: lexer.TokenId) void {
-        assert(l.isCurrentToken(token_id));
-        l.indices.id += 1;
-        const index_ptr = &@field(l.indices, @tagName(token_id));
-        const index = index_ptr.*;
-        const token_value = @field(l.result.arrays, @tagName(token_id)).items[index];
-        log.err("Consuming {s} ({})...", .{ @tagName(token_id), token_value });
-
-        index_ptr.* += 1;
-    }
-
-    fn isCurrentToken(l: *const Lexer, token_id: lexer.TokenId) bool {
-        return l.result.arrays.id.items[l.indices.id] == token_id;
-    }
-
-    fn getIdentifier(l: *const Lexer, identifier: Node) []const u8 {
-        comptime {
-            assert(lexer.Identifier == Node);
-        }
-
-        assert(identifier.type == .identifier);
-
-        return l.result.file[identifier.left..][0 .. identifier.right - identifier.left];
-    }
-
-    fn expectTokenType(l: *Lexer, comptime expected_token_id: lexer.TokenId) !lexer.TokenTypeMap[@intFromEnum(expected_token_id)] {
-        const peek_result = l.peek() orelse return error.not_implemented;
-        return switch (peek_result) {
-            expected_token_id => |token| blk: {
-                l.consume(expected_token_id);
-                break :blk token;
-            },
-            else => error.not_implemented,
-        };
-    }
-
-    fn expectTokenTypeIndex(l: *Lexer, comptime expected_token_id: lexer.TokenId) !u32 {
-        const peek_result = l.peek() orelse return error.not_implemented;
-        return switch (peek_result) {
-            expected_token_id => blk: {
-                const index = l.currentTokenIndex(expected_token_id);
-                l.consume(expected_token_id);
-                break :blk index;
-            },
-            else => error.not_implemented,
-        };
-    }
-
-    fn expectSpecificToken(l: *Lexer, comptime expected_token_id: lexer.TokenId, expected_token: lexer.TokenTypeMap[@intFromEnum(expected_token_id)]) !void {
-        const peek_result = l.peek() orelse return error.not_implemented;
-        switch (peek_result) {
-            expected_token_id => |token| {
-                if (expected_token != token) {
-                    return error.not_implemented;
-                }
-
-                l.consume(expected_token_id);
-            },
-            else => |token| {
-                std.debug.panic("{s}", .{@tagName(token)});
-            },
-        }
-    }
-
-    fn maybeExpectOperator(l: *Lexer, expected_operator: lexer.Operator) bool {
-        return switch (l.peek() orelse unreachable) {
-            .operator => |operator| {
-                const result = operator == expected_operator;
-                if (result) {
-                    l.consume(.operator);
-                }
-                return result;
-            },
-            else => false,
-        };
-    }
-
-    fn peek(l: *const Lexer) ?PeekResult {
-        if (l.indices.id >= l.result.arrays.id.items.len) {
-            return null;
-        }
-
-        return switch (l.result.arrays.id.items[l.indices.id]) {
-            inline else => |token| blk: {
-                const tag = @tagName(token);
-                const index = @field(l.indices, tag);
-                const array = &@field(l.result.arrays, tag);
-
-                break :blk @unionInit(PeekResult, tag, array.items[index]);
-            },
-        };
-    }
-};
-
-const Parser = struct {
-    lexer: Lexer,
-    nodes: ArrayList(Node),
-    function_map: ArrayList(lexer.Identifier),
-    allocator: Allocator,
-
-    fn appendNode(parser: *Parser, node: Node) !Node.Index {
-        const index = parser.nodes.items.len;
-        try parser.nodes.append(parser.allocator, node);
-        return @intCast(index);
-    }
-
-    fn getNode(parser: *Parser, node_index: Node.Index) *Node {
-        return &parser.nodes.items[node_index];
-    }
-
-    fn free(parser: *Parser) void {
-        _ = parser;
-    }
-
-    fn parseTypeExpression(parser: *Parser) !Node.Index {
-        // TODO: make this decent
-        return switch (parser.lexer.peek() orelse unreachable) {
-            .identifier => parser.nodeFromToken(.identifier),
-            else => unreachable,
-        };
-    }
-
-    fn parseFunctionDeclaration(parser: *Parser) !Node.Index {
-        try parser.lexer.expectSpecificToken(.operator, .left_parenthesis);
-        while (!parser.lexer.maybeExpectOperator(.right_parenthesis)) {
-            return error.not_implemented;
-        }
-
-        const t = try parser.parseTypeExpression();
-        const function_declaration = try parser.appendNode(.{
-            .type = .function_declaration_no_arguments,
-            .left = t,
-            .right = try parser.parseBlock(),
-        });
-        return function_declaration;
-    }
-
-    fn parseBlock(parser: *Parser) !Node.Index {
-        try parser.lexer.expectSpecificToken(.operator, .left_brace);
-
-        var statements = ArrayList(Node.Index){};
-
-        while (!parser.lexer.maybeExpectOperator(.right_brace)) {
-            const statement = try parser.parseStatement();
-            try statements.append(parser.allocator, statement);
-        }
-
-        const node: Node = switch (statements.items.len) {
-            0 => unreachable,
-            1 => .{
-                .type = .block_one,
-                .left = statements.items[0],
-                .right = 0,
-            },
-            else => unreachable,
-        };
-        log.debug("Parsed block!", .{});
-        return parser.appendNode(node);
-    }
-
-    fn parseStatement(parser: *Parser) !Node.Index {
-        // TODO: more stuff before
-        const expression = try parser.parseAssignExpression();
-        try parser.lexer.expectSpecificToken(.operator, .semicolon);
-
-        return expression;
-    }
-
-    fn parseAssignExpression(parser: *Parser) !Node.Index {
-        const expression = try parser.parseExpression();
-        switch (parser.lexer.peek() orelse unreachable) {
-            .operator => |operator| switch (operator) {
-                .semicolon => return expression,
-                else => unreachable,
-            },
-            else => unreachable,
-        }
-
-        return error.not_implemented;
-    }
-
-    fn parseExpression(parser: *Parser) Error!Node.Index {
-        return parser.parseExpressionPrecedence(0);
-    }
-
-    fn parseExpressionPrecedence(parser: *Parser, minimum_precedence: i32) !Node.Index {
-        var expr_index = try parser.parsePrefixExpression();
-        log.debug("Expr index: {}", .{expr_index});
-
-        var banned_precedence: i32 = -1;
-        while (parser.lexer.hasTokens()) {
-            const precedence: i32 = switch (parser.lexer.peek() orelse unreachable) {
-                .operator => |operator| switch (operator) {
-                    .semicolon => -1,
-                    else => @panic(@tagName(operator)),
-                },
-                else => |foo| std.debug.panic("Foo: ({s}) {}", .{ @tagName(foo), foo }),
-            };
-
-            if (precedence < minimum_precedence) {
-                break;
-            }
-
-            if (precedence == banned_precedence) {
-                unreachable;
-            }
-
-            const node_index = try parser.parseExpressionPrecedence(1);
-            _ = node_index;
-
-            unreachable;
-        }
-
-        log.err("Parsed expression precedence", .{});
-
-        return expr_index;
-    }
-
-    fn parsePrefixExpression(parser: *Parser) !Node.Index {
-        switch (parser.lexer.peek() orelse unreachable) {
-            // .bang => .bool_not,
-            // .minus => .negation,
-            // .tilde => .bit_not,
-            // .minus_percent => .negation_wrap,
-            // .ampersand => .address_of,
-            // .keyword_try => .@"try",
-            // .keyword_await => .@"await",
-
-            else => |pref| {
-                log.err("Pref: {s}", .{@tagName(pref)});
-                return parser.parsePrimaryExpression();
-            },
-        }
-
-        return error.not_implemented;
-    }
-
-    fn nodeFromToken(parser: *Parser, comptime token_id: lexer.TokenId) !Node.Index {
-        const node = try parser.appendNode(.{
-            .type = @field(Node.Type, @tagName(token_id)),
-            .left = @intCast(parser.lexer.currentTokenIndex(token_id)),
-            .right = 0,
-        });
-        parser.lexer.consume(token_id);
-
-        return node;
-    }
-
-    fn parsePrimaryExpression(parser: *Parser) !Node.Index {
-        const result = switch (parser.lexer.peek() orelse unreachable) {
-            .number => try parser.nodeFromToken(.number),
-            .identifier => |identifier| {
-                const identifier_name = parser.lexer.getIdentifier(identifier);
-                inline for (@typeInfo(Keyword).Enum.fields) |keyword| {
-                    if (std.mem.eql(u8, identifier_name, keyword.name)) return switch (@as(Keyword, @enumFromInt(keyword.value))) {
-                        .@"return" => blk: {
-                            parser.lexer.consume(.identifier);
-                            const node_ref = try parser.appendNode(.{
-                                .type = .@"return",
-                                .left = try parser.parseExpression(),
-                                .right = 0,
-                            });
-                            break :blk node_ref;
-                        },
-                        .@"fn" => blk: {
-                            parser.lexer.consume(.identifier);
-                            // TODO: figure out name association
-                            break :blk try parser.parseFunctionDeclaration();
-                        },
-                    };
-                }
-
-                unreachable;
-            },
-            else => |foo| {
-                std.debug.panic("foo: {s}. {}", .{ @tagName(foo), foo });
-            },
-        };
-
-        return result;
-    }
-
-    fn parseContainerMembers(parser: *Parser) !void {
-        var container_nodes = ArrayList(Node.Index){};
-        while (parser.lexer.hasTokens()) {
-            const container_node = switch (parser.lexer.peek() orelse unreachable) {
-                .identifier => |first_identifier_ref| blk: {
-                    parser.lexer.consume(.identifier);
-
-                    const first_identifier = parser.lexer.getIdentifier(first_identifier_ref);
-
-                    if (std.mem.eql(u8, first_identifier, "comptime")) {
-                        unreachable;
-                    } else {
-                        const mutability_qualifier: ExpressionMutabilityQualifier = if (std.mem.eql(u8, first_identifier, @tagName(ExpressionMutabilityQualifier.@"const"))) .@"const" else if (std.mem.eql(u8, first_identifier, @tagName(ExpressionMutabilityQualifier.@"var"))) .@"var" else @panic(first_identifier);
-                        _ = mutability_qualifier;
-
-                        const identifier = try parser.appendNode(.{
-                            .type = .identifier,
-                            .left = @intCast(try parser.lexer.expectTokenTypeIndex(.identifier)),
-                            .right = 0,
-                        });
-
-                        switch (parser.lexer.peek() orelse unreachable) {
-                            .operator => |operator| switch (operator) {
-                                .colon => unreachable,
-                                .equal => {
-                                    parser.lexer.consume(.operator);
-
-                                    const expression = try parser.parseExpression();
-                                    break :blk try parser.appendNode(.{
-                                        .type = .container_declaration,
-                                        .left = expression,
-                                        .right = identifier,
-                                    });
-                                },
-                                else => unreachable,
-                            },
-                            else => |foo| std.debug.panic("WTF: {}", .{foo}),
-                        }
-                    }
-                },
-                else => |a| std.debug.panic("{}", .{a}),
-            };
-
-            try container_nodes.append(parser.allocator, container_node);
-        }
-    }
-};

src/test/main.nat

@@ -1,3 +1,3 @@
 const main = fn() i32 {
     return 0;
-}
+};