feat: pattern support args and multiple variants; add zed extension for highlight

cmd/cli/main.go

@@ -99,11 +99,7 @@ func main() {
 }
 
 func parseSuite(path string) *dsl.File {
-	src, err := os.ReadFile(path)
+	f, warns, err := dsl.ParseFile(path)
-	if err != nil {
-		fatalf("cannot read %q: %v", path, err)
-	}
-	f, warns, err := dsl.Parse(string(src))
 	if err != nil {
 		fatalf("parse error in %q:\n  %v", path, err)
 	}

dsl/ast.go

@@ -50,6 +50,8 @@ type Pattern struct {
 	DirsGlob   string
 	InputFile  string
 	OutputFile string
+
+	Args []string
 }
 
 func (p *Pattern) IsDirMode() bool {

dsl/include_test.go

@@ -0,0 +1,210 @@
+package dsl
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func writeTempJdg(t *testing.T, dir, name, content string) string {
+	t.Helper()
+	path := filepath.Join(dir, name)
+	if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(path, []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+	return path
+}
+
+func TestIncludeBasicMerge(t *testing.T) {
+	dir := t.TempDir()
+
+	writeTempJdg(t, dir, "common.jdg", `
+toolchains {
+    gcc { platforms = "linux" }
+}
+
+build_defaults {
+    language = "c"
+    standard = "c11"
+    sources  = "*.c"
+    output   = "solution"
+    warnings = strict
+}
+`)
+
+	mainPath := writeTempJdg(t, dir, "main.jdg", `
+include "common.jdg"
+
+build "release" { profile = release }
+
+group("g") {
+    weight = 1.0
+    test("t") { stdout = "ok\n" }
+}
+`)
+
+	f, _, err := ParseFile(mainPath)
+	if err != nil {
+		t.Fatalf("parse: %v", err)
+	}
+
+	if len(f.Toolchains) != 1 || f.Toolchains[0].Name != "gcc" {
+		t.Errorf("toolchains not merged: %+v", f.Toolchains)
+	}
+	if f.BuildDefaults == nil || f.BuildDefaults.Language != "c" {
+		t.Errorf("build_defaults not merged: %+v", f.BuildDefaults)
+	}
+	if len(f.Builds) != 1 || f.Builds[0].Name != "release" {
+		t.Errorf("local build lost: %+v", f.Builds)
+	}
+}
+
+func TestIncludeLocalOverridesIncluded(t *testing.T) {
+	dir := t.TempDir()
+
+	writeTempJdg(t, dir, "common.jdg", `
+build_defaults {
+    language = "c"
+    standard = "c11"
+    warnings = strict
+}
+`)
+
+	mainPath := writeTempJdg(t, dir, "main.jdg", `
+include "common.jdg"
+
+build_defaults {
+    standard = "c17"
+}
+
+group("g") { weight = 1.0 test("t") { stdout = "ok\n" } }
+`)
+
+	f, _, err := ParseFile(mainPath)
+	if err != nil {
+		t.Fatalf("parse: %v", err)
+	}
+	if f.BuildDefaults.Standard != "c17" {
+		t.Errorf("local should override included standard: got %q", f.BuildDefaults.Standard)
+	}
+	if f.BuildDefaults.Language != "c" {
+		t.Errorf("language should survive from include: got %q", f.BuildDefaults.Language)
+	}
+	if f.BuildDefaults.Warnings != WarningsStrict {
+		t.Errorf("warnings should survive from include: got %v", f.BuildDefaults.Warnings)
+	}
+}
+
+func TestIncludeRelativePathResolution(t *testing.T) {
+	dir := t.TempDir()
+
+	writeTempJdg(t, dir, "shared/tools.jdg", `
+toolchains {
+    gcc { platforms = "linux" }
+}
+`)
+
+	mainPath := writeTempJdg(t, dir, "suite/main.jdg", `
+include "../shared/tools.jdg"
+
+build "release" {
+    language = "c"
+    sources  = "solution.c"
+    output   = "solution"
+    profile  = release
+}
+
+group("g") { weight = 1.0 test("t") { stdout = "ok\n" } }
+`)
+
+	f, _, err := ParseFile(mainPath)
+	if err != nil {
+		t.Fatalf("parse: %v", err)
+	}
+	if len(f.Toolchains) != 1 {
+		t.Errorf("relative include failed to resolve: %+v", f.Toolchains)
+	}
+}
+
+func TestIncludeDuplicateToolchainErrors(t *testing.T) {
+	dir := t.TempDir()
+
+	writeTempJdg(t, dir, "common.jdg", `
+toolchains {
+    gcc { platforms = "linux" }
+}
+`)
+
+	mainPath := writeTempJdg(t, dir, "main.jdg", `
+include "common.jdg"
+
+toolchains {
+    gcc { platforms = "linux" }
+}
+
+group("g") { weight = 1.0 test("t") { stdout = "ok\n" } }
+`)
+
+	_, _, err := ParseFile(mainPath)
+	if err == nil {
+		t.Fatal("expected duplicate toolchain error")
+	}
+	if !strings.Contains(err.Error(), "duplicate toolchain") {
+		t.Errorf("error %q does not mention duplicate toolchain", err.Error())
+	}
+}
+
+func TestIncludeCircularDetection(t *testing.T) {
+	dir := t.TempDir()
+
+	aPath := writeTempJdg(t, dir, "a.jdg", `
+include "b.jdg"
+group("ga") { weight = 1.0 test("t") { stdout = "ok\n" } }
+`)
+	writeTempJdg(t, dir, "b.jdg", `
+include "a.jdg"
+`)
+
+	_, _, err := ParseFile(aPath)
+	if err == nil {
+		t.Fatal("expected circular include error")
+	}
+	if !strings.Contains(err.Error(), "circular include") {
+		t.Errorf("error %q does not mention circular include", err.Error())
+	}
+}
+
+func TestIncludeMissingFileErrors(t *testing.T) {
+	dir := t.TempDir()
+
+	mainPath := writeTempJdg(t, dir, "main.jdg", `
+include "nonexistent.jdg"
+group("g") { weight = 1.0 test("t") { stdout = "ok\n" } }
+`)
+
+	_, _, err := ParseFile(mainPath)
+	if err == nil {
+		t.Fatal("expected missing include error")
+	}
+	if !strings.Contains(err.Error(), "nonexistent.jdg") {
+		t.Errorf("error %q does not reference the missing path", err.Error())
+	}
+}
+
+func TestParseRejectsIncludeWithoutFileContext(t *testing.T) {
+	src := `
+include "common.jdg"
+group("g") { weight = 1.0 test("t") { stdout = "ok\n" } }
+`
+	_, _, err := Parse(src)
+	if err == nil {
+		t.Fatal("expected error: include without file context")
+	}
+	if !strings.Contains(err.Error(), "file context") {
+		t.Errorf("error %q does not mention file context", err.Error())
+	}
+}

dsl/merge.go

@@ -0,0 +1,81 @@
+package dsl
+
+import "fmt"
+
+func mergeFiles(dst, src *File) error {
+	if src.Build != "" {
+		dst.Build = src.Build
+	}
+	if src.BuildLinux != "" {
+		dst.BuildLinux = src.BuildLinux
+	}
+	if src.BuildWindows != "" {
+		dst.BuildWindows = src.BuildWindows
+	}
+	if src.BuildDarwin != "" {
+		dst.BuildDarwin = src.BuildDarwin
+	}
+
+	if src.BuildDefaults != nil {
+		if dst.BuildDefaults == nil {
+			dst.BuildDefaults = &BuildConfig{}
+		}
+		dst.BuildDefaults.MergeFrom(src.BuildDefaults)
+	}
+
+	seenTC := map[string]bool{}
+	for _, t := range dst.Toolchains {
+		seenTC[t.Name] = true
+	}
+	for _, t := range src.Toolchains {
+		if seenTC[t.Name] {
+			return fmt.Errorf("duplicate toolchain %q", t.Name)
+		}
+		seenTC[t.Name] = true
+		dst.Toolchains = append(dst.Toolchains, t)
+	}
+
+	seenB := map[string]bool{}
+	for _, b := range dst.Builds {
+		seenB[b.Name] = true
+	}
+	for _, b := range src.Builds {
+		if seenB[b.Name] {
+			return fmt.Errorf("duplicate build %q", b.Name)
+		}
+		seenB[b.Name] = true
+		dst.Builds = append(dst.Builds, b)
+	}
+
+	seenG := map[string]bool{}
+	for _, g := range dst.Groups {
+		seenG[g.Name] = true
+	}
+	for _, g := range src.Groups {
+		if seenG[g.Name] {
+			return fmt.Errorf("duplicate group %q", g.Name)
+		}
+		seenG[g.Name] = true
+		dst.Groups = append(dst.Groups, g)
+	}
+
+	if src.Timeout != 0 {
+		dst.Timeout = src.Timeout
+	}
+	if src.MemoryLimit != 0 {
+		dst.MemoryLimit = src.MemoryLimit
+	}
+	if src.Binary != "" {
+		dst.Binary = src.Binary
+	}
+	if src.Sources != "" {
+		dst.Sources = src.Sources
+	}
+	if src.NormalizeCRLF {
+		dst.NormalizeCRLF = true
+	}
+	if src.TrimTrailingWS {
+		dst.TrimTrailingWS = true
+	}
+	return nil
+}

dsl/parser.go

@@ -3,6 +3,8 @@ package dsl
 import (
 	"fmt"
 	"math"
+	"os"
+	"path/filepath"
 	"strconv"
 	"time"
 )
@@ -11,6 +13,8 @@ type Parser struct {
 	tokens         []Token
 	pos            int
 	warns          []string
+	includeBaseDir string
+	visited        map[string]bool
 }
 
 func NewParser(tokens []Token) *Parser {
@@ -72,9 +76,67 @@ func Parse(src string) (*File, []string, error) {
 	if err != nil {
 		return nil, parser.Warnings(), err
 	}
+	if err := parser.finalize(file); err != nil {
+		return nil, parser.Warnings(), err
+	}
 	return file, parser.Warnings(), nil
 }
 
+func ParseFile(path string) (*File, []string, error) {
+	abs, err := filepath.Abs(path)
+	if err != nil {
+		return nil, nil, fmt.Errorf("resolve %q: %w", path, err)
+	}
+	visited := map[string]bool{}
+	parser, file, err := parseFileOnDisk(abs, visited)
+	if err != nil {
+		var warns []string
+		if parser != nil {
+			warns = parser.Warnings()
+		}
+		return nil, warns, err
+	}
+	if err := parser.finalize(file); err != nil {
+		return nil, parser.Warnings(), err
+	}
+	return file, parser.Warnings(), nil
+}
+
+func parseFileOnDisk(absPath string, visited map[string]bool) (*Parser, *File, error) {
+	if visited[absPath] {
+		return nil, nil, fmt.Errorf("circular include: %s", absPath)
+	}
+	visited[absPath] = true
+
+	src, err := os.ReadFile(absPath)
+	if err != nil {
+		return nil, nil, fmt.Errorf("read %s: %w", absPath, err)
+	}
+	tokens, err := NewLexer(string(src)).Tokenize()
+	if err != nil {
+		return nil, nil, fmt.Errorf("%s: %w", absPath, err)
+	}
+	p := NewParser(tokens)
+	p.includeBaseDir = filepath.Dir(absPath)
+	p.visited = visited
+
+	file, err := p.parseFile()
+	if err != nil {
+		return p, nil, fmt.Errorf("%s: %w", absPath, err)
+	}
+	return p, file, nil
+}
+
+func (p *Parser) finalize(f *File) error {
+	if err := p.validateWeights(f); err != nil {
+		return err
+	}
+	if err := validateBuilds(f); err != nil {
+		return err
+	}
+	return nil
+}
+
 func (p *Parser) parseFile() (*File, error) {
 	f := &File{}
 
@@ -107,7 +169,10 @@ func (p *Parser) parseFile() (*File, error) {
 			if err != nil {
 				return nil, err
 			}
-			f.BuildDefaults = bc
+			if f.BuildDefaults == nil {
+				f.BuildDefaults = &BuildConfig{}
+			}
+			f.BuildDefaults.MergeFrom(bc)
 
 		case "toolchains":
 			p.advance()
@@ -115,7 +180,45 @@ func (p *Parser) parseFile() (*File, error) {
 			if err != nil {
 				return nil, err
 			}
-			f.Toolchains = specs
+			existing := map[string]bool{}
+			for _, tc := range f.Toolchains {
+				existing[tc.Name] = true
+			}
+			for _, tc := range specs {
+				if existing[tc.Name] {
+					return nil, fmt.Errorf("duplicate toolchain %q", tc.Name)
+				}
+				existing[tc.Name] = true
+				f.Toolchains = append(f.Toolchains, tc)
+			}
+
+		case "include":
+			p.advance()
+			s, err := p.expect(TOKEN_STRING)
+			if err != nil {
+				return nil, err
+			}
+			if p.includeBaseDir == "" {
+				return nil, fmt.Errorf("%d:%d: `include` requires file context (use ParseFile, not Parse)", s.Line, s.Col)
+			}
+			target := s.Value
+			if !filepath.IsAbs(target) {
+				target = filepath.Join(p.includeBaseDir, target)
+			}
+			abs, err := filepath.Abs(target)
+			if err != nil {
+				return nil, fmt.Errorf("%d:%d: resolve include %q: %w", s.Line, s.Col, s.Value, err)
+			}
+			childParser, child, err := parseFileOnDisk(abs, p.visited)
+			if err != nil {
+				return nil, fmt.Errorf("%d:%d: include %q: %w", s.Line, s.Col, s.Value, err)
+			}
+			for _, w := range childParser.Warnings() {
+				p.warn(w)
+			}
+			if err := mergeFiles(f, child); err != nil {
+				return nil, fmt.Errorf("%d:%d: include %q: %w", s.Line, s.Col, s.Value, err)
+			}
 
 		case "build_linux":
 			p.advance()
@@ -216,13 +319,6 @@ func (p *Parser) parseFile() (*File, error) {
 		}
 	}
 
-	if err := p.validateWeights(f); err != nil {
-		return nil, err
-	}
-	if err := validateBuilds(f); err != nil {
-		return nil, err
-	}
-
 	return f, nil
 }
 
@@ -683,25 +779,40 @@ func (p *Parser) parsePattern() (*Pattern, error) {
 		if _, err := p.expect(TOKEN_ASSIGN); err != nil {
 			return nil, err
 		}
+
+		switch t.Value {
+		case "input":
 			val, err := p.expect(TOKEN_STRING)
 			if err != nil {
 				return nil, err
 			}
-		switch t.Value {
-		case "input":
 			if pat.DirsGlob != "" {
 				pat.InputFile = val.Value
 			} else {
 				pat.InputGlob = val.Value
 			}
 		case "output":
+			val, err := p.expect(TOKEN_STRING)
+			if err != nil {
+				return nil, err
+			}
 			if pat.DirsGlob != "" {
 				pat.OutputFile = val.Value
 			} else {
 				pat.OutputGlob = val.Value
 			}
 		case "dirs":
+			val, err := p.expect(TOKEN_STRING)
+			if err != nil {
+				return nil, err
+			}
 			pat.DirsGlob = val.Value
+		case "args":
+			xs, err := p.parseStringList()
+			if err != nil {
+				return nil, err
+			}
+			pat.Args = xs
 		default:
 			return nil, fmt.Errorf("%d:%d: unknown pattern field %q", t.Line, t.Col, t.Value)
 		}

editor/zed/.gitignore

@@ -0,0 +1,17 @@
+grammars/*.wasm
+
+tree-sitter-jdg/tree-sitter-jdg.wasm
+tree-sitter-jdg/node_modules/
+tree-sitter-jdg/bindings/
+tree-sitter-jdg/binding.gyp
+tree-sitter-jdg/Cargo.toml
+tree-sitter-jdg/Cargo.lock
+tree-sitter-jdg/Makefile
+tree-sitter-jdg/Package.swift
+tree-sitter-jdg/pyproject.toml
+tree-sitter-jdg/setup.py
+tree-sitter-jdg/go.mod
+tree-sitter-jdg/go.sum
+tree-sitter-jdg/bindings.gyp
+tree-sitter-jdg/prebuilds/
+tree-sitter-jdg/target/

editor/zed/extension.toml

@@ -0,0 +1,23 @@
+id = "jdg"
+name = "JDG"
+version = "0.1.0"
+schema_version = 1
+description = "Syntax highlighting for the judge DSL (.jdg)"
+repository = "https://github.com/Mond1c/judge"
+authors = ["judge contributors"]
+themes = []
+icon_themes = []
+languages = ["languages/jdg"]
+capabilities = []
+
+[lib]
+
+[grammars.jdg]
+repository = "https://github.com/Mond1c/judge"
+rev = "main"
+
+[language_servers]
+
+[context_servers]
+
+[slash_commands]

editor/zed/languages/jdg/brackets.scm

@@ -0,0 +1,2 @@
+("{" @open "}" @close)
+("(" @open ")" @close)

editor/zed/languages/jdg/config.toml

@@ -0,0 +1,12 @@
+name = "JDG"
+grammar = "jdg"
+path_suffixes = ["jdg"]
+line_comments = ["// "]
+autoclose_before = ";:.,=}])>"
+brackets = [
+  { start = "{", end = "}", close = true, newline = true },
+  { start = "(", end = ")", close = true, newline = false },
+  { start = "\"", end = "\"", close = true, newline = false, not_in = ["string", "comment"] },
+]
+word_characters = ["_"]
+tab_size = 4

editor/zed/languages/jdg/highlights.scm

@@ -0,0 +1,100 @@
+(comment) @comment
+
+[
+  "include"
+  "build"
+  "build_defaults"
+  "build_linux"
+  "build_windows"
+  "build_darwin"
+  "toolchains"
+  "binary"
+  "sources"
+  "timeout"
+  "memory_limit"
+  "group"
+  "test"
+  "pattern"
+] @keyword
+
+[
+  "normalize_crlf"
+  "trim_trailing_ws"
+] @keyword
+
+(build_scalar_field  name: _ @property)
+(build_list_field    name: _ @property)
+(bool_decl           name: _ @property)
+(legacy_build_platform keyword: _ @keyword)
+
+[
+  "profile"
+  "warnings"
+  "define"
+  "platforms"
+  "binary"
+  "class"
+  "weight"
+  "scoring"
+  "wrapper"
+  "env"
+  "stdin"
+  "stdout"
+  "stderr"
+  "args"
+  "exitCode"
+  "file"
+  "outFile"
+  "input"
+  "output"
+  "dirs"
+] @property
+
+[
+  "linux"
+  "windows"
+  "darwin"
+] @type.builtin
+
+(profile_value)  @constant.builtin
+(warnings_value) @constant.builtin
+(scoring_value)  @constant.builtin
+(class_value)    @constant.builtin
+(bool)           @constant.builtin
+
+"of" @keyword.operator
+
+[
+  "contains"
+  "matches"
+  "anyOrder"
+] @function.builtin
+
+[
+  "="
+  "~"
+] @operator
+
+[
+  "{"
+  "}"
+  "("
+  ")"
+] @punctuation.bracket
+
+(simple_string)  @string
+(heredoc_string) @string
+(regex_string)   @string.regex
+
+(structured_build name: (string) @string.special)
+(legacy_build     command: (string) @string.special)
+(toolchain_entry  name: (string) @type)
+(toolchain_entry  name: (identifier) @type)
+(group            name: (string) @string.special)
+(test             name: (string) @string.special)
+(include          path: (string) @string.special.path)
+
+(define_field  key: (string) @constant.macro)
+(env_decl      key: (string) @constant.macro)
+(file_decl     key: (string) @string.special.path)
+(out_file_decl key: (string) @string.special.path)

editor/zed/languages/jdg/indents.scm

@@ -0,0 +1,11 @@
+[
+  (build_block)
+  (toolchains)
+  (toolchain_entry)
+  (group)
+  (test)
+  (pattern)
+  (any_order_matcher)
+] @indent
+
+"}" @end

editor/zed/languages/jdg/injections.scm

@@ -0,0 +1,7 @@
+((comment) @injection.content
+  (#set! injection.language "comment"))
+
+((regex_matcher
+  pattern: (regex_string) @injection.content)
+  (#set! injection.language "regex")
+  (#set! injection.include-children))

editor/zed/languages/jdg/outline.scm

@@ -0,0 +1,23 @@
+(structured_build
+  "build" @context
+  name: (string) @name) @item
+
+(build_defaults
+  "build_defaults" @context) @item
+
+(toolchains
+  "toolchains" @context) @item
+
+(toolchain_entry
+  name: (_) @name) @item
+
+(group
+  "group" @context
+  name: (string) @name) @item
+
+(test
+  "test" @context
+  name: (string) @name) @item
+
+(pattern
+  "pattern" @context) @item

editor/zed/tree-sitter-jdg/.editorconfig

@@ -0,0 +1,39 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{json,toml,yml,gyp}]
+indent_style = space
+indent_size = 2
+
+[*.js]
+indent_style = space
+indent_size = 2
+
+[*.rs]
+indent_style = space
+indent_size = 4
+
+[*.{c,cc,h}]
+indent_style = space
+indent_size = 4
+
+[*.{py,pyi}]
+indent_style = space
+indent_size = 4
+
+[*.swift]
+indent_style = space
+indent_size = 4
+
+[*.go]
+indent_style = tab
+indent_size = 8
+
+[Makefile]
+indent_style = tab
+indent_size = 8

editor/zed/tree-sitter-jdg/.gitattributes

@@ -0,0 +1,11 @@
+* text eol=lf
+
+src/*.json linguist-generated
+src/parser.c linguist-generated
+src/tree_sitter/* linguist-generated
+
+bindings/** linguist-generated
+binding.gyp linguist-generated
+setup.py linguist-generated
+Makefile linguist-generated
+Package.swift linguist-generated

editor/zed/tree-sitter-jdg/.gitignore

@@ -0,0 +1,38 @@
+# Rust artifacts
+Cargo.lock
+target/
+
+# Node artifacts
+build/
+prebuilds/
+node_modules/
+*.tgz
+
+# Swift artifacts
+.build/
+
+# Go artifacts
+go.sum
+_obj/
+
+# Python artifacts
+.venv/
+dist/
+*.egg-info
+*.whl
+
+# C artifacts
+*.a
+*.so
+*.so.*
+*.dylib
+*.dll
+*.pc
+
+# Example dirs
+/examples/*/
+
+# Grammar volatiles
+*.wasm
+*.obj
+*.o

editor/zed/tree-sitter-jdg/grammar.js

@@ -0,0 +1,342 @@
+module.exports = grammar({
+  name: 'jdg',
+
+  extras: $ => [/\s+/, $.comment],
+
+  word: $ => $.identifier,
+
+  conflicts: $ => [],
+
+  rules: {
+    source_file: $ => repeat($._top_statement),
+
+    comment: $ => token(seq('//', /[^\n]*/)),
+
+    _top_statement: $ => choice(
+      $.include,
+      $.toolchains,
+      $.build_defaults,
+      $.structured_build,
+      $.legacy_build_platform,
+      $.legacy_build,
+      $.binary_decl,
+      $.sources_decl,
+      $.bool_decl,
+      $.timeout_decl,
+      $.memory_limit_decl,
+      $.group,
+    ),
+
+    include: $ => seq(
+      'include',
+      field('path', $.string)
+    ),
+
+    legacy_build: $ => prec(1, seq(
+      'build',
+      field('command', $.string)
+    )),
+
+    legacy_build_platform: $ => seq(
+      field('keyword', choice('build_linux', 'build_windows', 'build_darwin')),
+      field('command', $.string)
+    ),
+
+    structured_build: $ => prec(2, seq(
+      'build',
+      field('name', $.string),
+      field('body', $.build_block)
+    )),
+
+    build_defaults: $ => seq(
+      'build_defaults',
+      field('body', $.build_block)
+    ),
+
+    build_block: $ => seq(
+      '{',
+      repeat($._build_field),
+      '}'
+    ),
+
+    _build_field: $ => choice(
+      $.build_scalar_field,
+      $.build_list_field,
+      $.build_profile_field,
+      $.build_warnings_field,
+      $.define_field,
+      $.os_override,
+    ),
+
+    build_scalar_field: $ => seq(
+      field('name', choice('language', 'standard', 'output', 'wrapper')),
+      '=',
+      field('value', $.string)
+    ),
+
+    build_list_field: $ => seq(
+      field('name', choice('sources', 'includes', 'sanitize', 'link', 'extra', 'platforms', 'compilers')),
+      '=',
+      field('value', repeat1($.string))
+    ),
+
+    build_profile_field: $ => seq(
+      'profile',
+      '=',
+      field('value', $.profile_value)
+    ),
+    profile_value: $ => choice('release', 'debug', 'sanitized'),
+
+    build_warnings_field: $ => seq(
+      'warnings',
+      '=',
+      field('value', $.warnings_value)
+    ),
+    warnings_value: $ => choice('default', 'strict', 'pedantic'),
+
+    define_field: $ => seq(
+      'define',
+      '(',
+      field('key', $.string),
+      ')',
+      '=',
+      field('value', $.string)
+    ),
+
+    os_override: $ => seq(
+      field('os', $.os_name),
+      field('body', $.build_block)
+    ),
+    os_name: $ => choice('linux', 'windows', 'darwin'),
+
+    toolchains: $ => seq(
+      'toolchains',
+      '{',
+      repeat($.toolchain_entry),
+      '}'
+    ),
+
+    toolchain_entry: $ => seq(
+      field('name', choice($.identifier, $.string)),
+      '{',
+      repeat($._toolchain_field),
+      '}'
+    ),
+
+    _toolchain_field: $ => choice(
+      $.toolchain_platforms_field,
+      $.toolchain_binary_field,
+      $.toolchain_class_field,
+    ),
+
+    toolchain_platforms_field: $ => seq(
+      'platforms',
+      '=',
+      field('value', repeat1($.string))
+    ),
+    toolchain_binary_field: $ => seq(
+      'binary',
+      '=',
+      field('value', $.string)
+    ),
+    toolchain_class_field: $ => seq(
+      'class',
+      '=',
+      field('value', $.class_value)
+    ),
+    class_value: $ => choice('gnu', 'msvc'),
+
+    binary_decl: $ => seq(
+      'binary',
+      '=',
+      field('value', $.string)
+    ),
+
+    sources_decl: $ => seq(
+      'sources',
+      '=',
+      field('value', $.string)
+    ),
+
+    bool_decl: $ => seq(
+      field('name', choice('normalize_crlf', 'trim_trailing_ws')),
+      '=',
+      field('value', $.bool)
+    ),
+
+    timeout_decl: $ => seq(
+      'timeout',
+      field('value', $.duration)
+    ),
+
+    memory_limit_decl: $ => seq(
+      'memory_limit',
+      '=',
+      field('value', $.size)
+    ),
+
+    group: $ => seq(
+      'group',
+      '(',
+      field('name', $.string),
+      ')',
+      '{',
+      repeat($._group_field),
+      '}'
+    ),
+
+    _group_field: $ => choice(
+      $.group_weight_field,
+      $.group_timeout_field,
+      $.group_memory_field,
+      $.group_scoring_field,
+      $.group_wrapper_field,
+      $.env_decl,
+      $.test,
+      $.pattern,
+    ),
+
+    group_weight_field: $ => seq('weight', '=', field('value', $.number)),
+    group_timeout_field: $ => seq('timeout', '=', field('value', $.duration)),
+    group_memory_field: $ => seq('memory_limit', '=', field('value', $.size)),
+    group_scoring_field: $ => seq('scoring', '=', field('value', $.scoring_value)),
+    scoring_value: $ => choice('partial', 'all_or_none'),
+    group_wrapper_field: $ => seq('wrapper', '=', field('value', $.string)),
+
+    env_decl: $ => seq(
+      'env',
+      '(',
+      field('key', $.string),
+      ')',
+      '=',
+      field('value', $.string)
+    ),
+
+    test: $ => seq(
+      'test',
+      '(',
+      field('name', $.string),
+      ')',
+      '{',
+      repeat($._test_field),
+      '}'
+    ),
+
+    _test_field: $ => choice(
+      $.test_stdin_field,
+      $.test_stdout_field,
+      $.test_stderr_field,
+      $.test_args_field,
+      $.test_exit_code_field,
+      $.test_timeout_field,
+      $.test_memory_field,
+      $.test_wrapper_field,
+      $.env_decl,
+      $.file_decl,
+      $.out_file_decl,
+    ),
+
+    test_stdin_field: $ => seq('stdin', '=', field('value', $.string)),
+    test_stdout_field: $ => seq('stdout', $._matcher),
+    test_stderr_field: $ => seq('stderr', $._matcher),
+    test_args_field: $ => seq('args', '=', field('value', repeat1($.string))),
+    test_exit_code_field: $ => seq('exitCode', '=', field('value', $.integer)),
+    test_timeout_field: $ => seq('timeout', '=', field('value', $.duration)),
+    test_memory_field: $ => seq('memory_limit', '=', field('value', $.size)),
+    test_wrapper_field: $ => seq('wrapper', '=', field('value', $.string)),
+
+    file_decl: $ => seq(
+      'file',
+      '(',
+      field('key', $.string),
+      ')',
+      '=',
+      field('value', $.string)
+    ),
+
+    out_file_decl: $ => seq(
+      'outFile',
+      '(',
+      field('key', $.string),
+      ')',
+      '=',
+      field('value', $.string)
+    ),
+
+    _matcher: $ => choice(
+      $.exact_matcher,
+      $.numeric_matcher,
+      $.contains_matcher,
+      $.regex_matcher,
+      $.any_order_matcher,
+    ),
+
+    exact_matcher: $ => seq('=', field('value', $.string)),
+    numeric_matcher: $ => seq(
+      '~',
+      field('epsilon', $.number),
+      'of',
+      field('value', $.string)
+    ),
+    contains_matcher: $ => seq('contains', field('value', $.string)),
+    regex_matcher: $ => seq('matches', field('pattern', $.regex_string)),
+    any_order_matcher: $ => seq(
+      'anyOrder',
+      '{',
+      repeat1($.string),
+      '}'
+    ),
+
+    pattern: $ => seq(
+      'pattern',
+      '{',
+      repeat($._pattern_field),
+      '}'
+    ),
+
+    _pattern_field: $ => choice(
+      $.pattern_input_field,
+      $.pattern_output_field,
+      $.pattern_dirs_field,
+      $.pattern_args_field,
+    ),
+
+    pattern_input_field: $ => seq('input', '=', field('value', $.string)),
+    pattern_output_field: $ => seq('output', '=', field('value', $.string)),
+    pattern_dirs_field: $ => seq('dirs', '=', field('value', $.string)),
+    pattern_args_field: $ => seq('args', '=', field('value', repeat1($.string))),
+
+    bool: $ => choice('true', 'false'),
+
+    number: $ => choice($.integer, $.float),
+
+    string: $ => choice(
+      $.heredoc_string,
+      $.simple_string,
+    ),
+
+    simple_string: $ => token(seq(
+      '"',
+      repeat(choice(
+        /[^"\\\n]/,
+        seq('\\', /./)
+      )),
+      '"'
+    )),
+
+    heredoc_string: $ => token(seq(
+      '"""',
+      /([^"]|"[^"]|""[^"])*/,
+      '"""'
+    )),
+
+    regex_string: $ => $.simple_string,
+
+    identifier: $ => /[a-zA-Z_][a-zA-Z0-9_]*/,
+
+    integer: $ => token(/-?\d+/),
+    float: $ => token(/-?\d+\.\d+/),
+    duration: $ => token(/\d+(ms|s|m)/),
+    size: $ => token(/\d+(KiB|MiB|GiB|KB|MB|GB|B|K|M|G)/),
+  }
+});

editor/zed/tree-sitter-jdg/package.json

@@ -0,0 +1,54 @@
+{
+  "name": "tree-sitter-jdg",
+  "version": "0.1.0",
+  "description": "Tree-sitter grammar for the judge DSL (.jdg)",
+  "main": "bindings/node",
+  "types": "bindings/node",
+  "keywords": [
+    "tree-sitter",
+    "parser",
+    "jdg",
+    "judge"
+  ],
+  "files": [
+    "grammar.js",
+    "binding.gyp",
+    "prebuilds/**",
+    "bindings/node/*",
+    "queries/*",
+    "src/**"
+  ],
+  "license": "MIT",
+  "dependencies": {
+    "node-addon-api": "^7.1.0",
+    "node-gyp-build": "^4.8.0"
+  },
+  "peerDependencies": {
+    "tree-sitter": "^0.21.0"
+  },
+  "peerDependenciesMeta": {
+    "tree_sitter": {
+      "optional": true
+    }
+  },
+  "devDependencies": {
+    "tree-sitter-cli": "^0.22.0",
+    "prebuildify": "^6.0.0"
+  },
+  "scripts": {
+    "build": "tree-sitter generate",
+    "test": "tree-sitter test",
+    "install": "node-gyp-build",
+    "prebuildify": "prebuildify --napi --strip"
+  },
+  "tree-sitter": [
+    {
+      "scope": "source.jdg",
+      "file-types": [
+        "jdg"
+      ],
+      "highlights": "queries/highlights.scm",
+      "injections": "queries/injections.scm"
+    }
+  ]
+}

editor/zed/tree-sitter-jdg/src/tree_sitter/alloc.h

@@ -0,0 +1,54 @@
+#ifndef TREE_SITTER_ALLOC_H_
+#define TREE_SITTER_ALLOC_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+// Allow clients to override allocation functions
+#ifdef TREE_SITTER_REUSE_ALLOCATOR
+
+extern void *(*ts_current_malloc)(size_t);
+extern void *(*ts_current_calloc)(size_t, size_t);
+extern void *(*ts_current_realloc)(void *, size_t);
+extern void (*ts_current_free)(void *);
+
+#ifndef ts_malloc
+#define ts_malloc  ts_current_malloc
+#endif
+#ifndef ts_calloc
+#define ts_calloc  ts_current_calloc
+#endif
+#ifndef ts_realloc
+#define ts_realloc ts_current_realloc
+#endif
+#ifndef ts_free
+#define ts_free    ts_current_free
+#endif
+
+#else
+
+#ifndef ts_malloc
+#define ts_malloc  malloc
+#endif
+#ifndef ts_calloc
+#define ts_calloc  calloc
+#endif
+#ifndef ts_realloc
+#define ts_realloc realloc
+#endif
+#ifndef ts_free
+#define ts_free    free
+#endif
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // TREE_SITTER_ALLOC_H_

editor/zed/tree-sitter-jdg/src/tree_sitter/array.h

@@ -0,0 +1,290 @@
+#ifndef TREE_SITTER_ARRAY_H_
+#define TREE_SITTER_ARRAY_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "./alloc.h"
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef _MSC_VER
+#pragma warning(disable : 4101)
+#elif defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-variable"
+#endif
+
+#define Array(T)       \
+  struct {             \
+    T *contents;       \
+    uint32_t size;     \
+    uint32_t capacity; \
+  }
+
+/// Initialize an array.
+#define array_init(self) \
+  ((self)->size = 0, (self)->capacity = 0, (self)->contents = NULL)
+
+/// Create an empty array.
+#define array_new() \
+  { NULL, 0, 0 }
+
+/// Get a pointer to the element at a given `index` in the array.
+#define array_get(self, _index) \
+  (assert((uint32_t)(_index) < (self)->size), &(self)->contents[_index])
+
+/// Get a pointer to the first element in the array.
+#define array_front(self) array_get(self, 0)
+
+/// Get a pointer to the last element in the array.
+#define array_back(self) array_get(self, (self)->size - 1)
+
+/// Clear the array, setting its size to zero. Note that this does not free any
+/// memory allocated for the array's contents.
+#define array_clear(self) ((self)->size = 0)
+
+/// Reserve `new_capacity` elements of space in the array. If `new_capacity` is
+/// less than the array's current capacity, this function has no effect.
+#define array_reserve(self, new_capacity) \
+  _array__reserve((Array *)(self), array_elem_size(self), new_capacity)
+
+/// Free any memory allocated for this array. Note that this does not free any
+/// memory allocated for the array's contents.
+#define array_delete(self) _array__delete((Array *)(self))
+
+/// Push a new `element` onto the end of the array.
+#define array_push(self, element)                            \
+  (_array__grow((Array *)(self), 1, array_elem_size(self)), \
+   (self)->contents[(self)->size++] = (element))
+
+/// Increase the array's size by `count` elements.
+/// New elements are zero-initialized.
+#define array_grow_by(self, count) \
+  do { \
+    if ((count) == 0) break; \
+    _array__grow((Array *)(self), count, array_elem_size(self)); \
+    memset((self)->contents + (self)->size, 0, (count) * array_elem_size(self)); \
+    (self)->size += (count); \
+  } while (0)
+
+/// Append all elements from one array to the end of another.
+#define array_push_all(self, other)                                       \
+  array_extend((self), (other)->size, (other)->contents)
+
+/// Append `count` elements to the end of the array, reading their values from the
+/// `contents` pointer.
+#define array_extend(self, count, contents)                    \
+  _array__splice(                                               \
+    (Array *)(self), array_elem_size(self), (self)->size, \
+    0, count,  contents                                        \
+  )
+
+/// Remove `old_count` elements from the array starting at the given `index`. At
+/// the same index, insert `new_count` new elements, reading their values from the
+/// `new_contents` pointer.
+#define array_splice(self, _index, old_count, new_count, new_contents)  \
+  _array__splice(                                                       \
+    (Array *)(self), array_elem_size(self), _index,                \
+    old_count, new_count, new_contents                                 \
+  )
+
+/// Insert one `element` into the array at the given `index`.
+#define array_insert(self, _index, element) \
+  _array__splice((Array *)(self), array_elem_size(self), _index, 0, 1, &(element))
+
+/// Remove one element from the array at the given `index`.
+#define array_erase(self, _index) \
+  _array__erase((Array *)(self), array_elem_size(self), _index)
+
+/// Pop the last element off the array, returning the element by value.
+#define array_pop(self) ((self)->contents[--(self)->size])
+
+/// Assign the contents of one array to another, reallocating if necessary.
+#define array_assign(self, other) \
+  _array__assign((Array *)(self), (const Array *)(other), array_elem_size(self))
+
+/// Swap one array with another
+#define array_swap(self, other) \
+  _array__swap((Array *)(self), (Array *)(other))
+
+/// Get the size of the array contents
+#define array_elem_size(self) (sizeof *(self)->contents)
+
+/// Search a sorted array for a given `needle` value, using the given `compare`
+/// callback to determine the order.
+///
+/// If an existing element is found to be equal to `needle`, then the `index`
+/// out-parameter is set to the existing value's index, and the `exists`
+/// out-parameter is set to true. Otherwise, `index` is set to an index where
+/// `needle` should be inserted in order to preserve the sorting, and `exists`
+/// is set to false.
+#define array_search_sorted_with(self, compare, needle, _index, _exists) \
+  _array__search_sorted(self, 0, compare, , needle, _index, _exists)
+
+/// Search a sorted array for a given `needle` value, using integer comparisons
+/// of a given struct field (specified with a leading dot) to determine the order.
+///
+/// See also `array_search_sorted_with`.
+#define array_search_sorted_by(self, field, needle, _index, _exists) \
+  _array__search_sorted(self, 0, _compare_int, field, needle, _index, _exists)
+
+/// Insert a given `value` into a sorted array, using the given `compare`
+/// callback to determine the order.
+#define array_insert_sorted_with(self, compare, value) \
+  do { \
+    unsigned _index, _exists; \
+    array_search_sorted_with(self, compare, &(value), &_index, &_exists); \
+    if (!_exists) array_insert(self, _index, value); \
+  } while (0)
+
+/// Insert a given `value` into a sorted array, using integer comparisons of
+/// a given struct field (specified with a leading dot) to determine the order.
+///
+/// See also `array_search_sorted_by`.
+#define array_insert_sorted_by(self, field, value) \
+  do { \
+    unsigned _index, _exists; \
+    array_search_sorted_by(self, field, (value) field, &_index, &_exists); \
+    if (!_exists) array_insert(self, _index, value); \
+  } while (0)
+
+// Private
+
+typedef Array(void) Array;
+
+/// This is not what you're looking for, see `array_delete`.
+static inline void _array__delete(Array *self) {
+  if (self->contents) {
+    ts_free(self->contents);
+    self->contents = NULL;
+    self->size = 0;
+    self->capacity = 0;
+  }
+}
+
+/// This is not what you're looking for, see `array_erase`.
+static inline void _array__erase(Array *self, size_t element_size,
+                                uint32_t index) {
+  assert(index < self->size);
+  char *contents = (char *)self->contents;
+  memmove(contents + index * element_size, contents + (index + 1) * element_size,
+          (self->size - index - 1) * element_size);
+  self->size--;
+}
+
+/// This is not what you're looking for, see `array_reserve`.
+static inline void _array__reserve(Array *self, size_t element_size, uint32_t new_capacity) {
+  if (new_capacity > self->capacity) {
+    if (self->contents) {
+      self->contents = ts_realloc(self->contents, new_capacity * element_size);
+    } else {
+      self->contents = ts_malloc(new_capacity * element_size);
+    }
+    self->capacity = new_capacity;
+  }
+}
+
+/// This is not what you're looking for, see `array_assign`.
+static inline void _array__assign(Array *self, const Array *other, size_t element_size) {
+  _array__reserve(self, element_size, other->size);
+  self->size = other->size;
+  memcpy(self->contents, other->contents, self->size * element_size);
+}
+
+/// This is not what you're looking for, see `array_swap`.
+static inline void _array__swap(Array *self, Array *other) {
+  Array swap = *other;
+  *other = *self;
+  *self = swap;
+}
+
+/// This is not what you're looking for, see `array_push` or `array_grow_by`.
+static inline void _array__grow(Array *self, uint32_t count, size_t element_size) {
+  uint32_t new_size = self->size + count;
+  if (new_size > self->capacity) {
+    uint32_t new_capacity = self->capacity * 2;
+    if (new_capacity < 8) new_capacity = 8;
+    if (new_capacity < new_size) new_capacity = new_size;
+    _array__reserve(self, element_size, new_capacity);
+  }
+}
+
+/// This is not what you're looking for, see `array_splice`.
+static inline void _array__splice(Array *self, size_t element_size,
+                                 uint32_t index, uint32_t old_count,
+                                 uint32_t new_count, const void *elements) {
+  uint32_t new_size = self->size + new_count - old_count;
+  uint32_t old_end = index + old_count;
+  uint32_t new_end = index + new_count;
+  assert(old_end <= self->size);
+
+  _array__reserve(self, element_size, new_size);
+
+  char *contents = (char *)self->contents;
+  if (self->size > old_end) {
+    memmove(
+      contents + new_end * element_size,
+      contents + old_end * element_size,
+      (self->size - old_end) * element_size
+    );
+  }
+  if (new_count > 0) {
+    if (elements) {
+      memcpy(
+        (contents + index * element_size),
+        elements,
+        new_count * element_size
+      );
+    } else {
+      memset(
+        (contents + index * element_size),
+        0,
+        new_count * element_size
+      );
+    }
+  }
+  self->size += new_count - old_count;
+}
+
+/// A binary search routine, based on Rust's `std::slice::binary_search_by`.
+/// This is not what you're looking for, see `array_search_sorted_with` or `array_search_sorted_by`.
+#define _array__search_sorted(self, start, compare, suffix, needle, _index, _exists) \
+  do { \
+    *(_index) = start; \
+    *(_exists) = false; \
+    uint32_t size = (self)->size - *(_index); \
+    if (size == 0) break; \
+    int comparison; \
+    while (size > 1) { \
+      uint32_t half_size = size / 2; \
+      uint32_t mid_index = *(_index) + half_size; \
+      comparison = compare(&((self)->contents[mid_index] suffix), (needle)); \
+      if (comparison <= 0) *(_index) = mid_index; \
+      size -= half_size; \
+    } \
+    comparison = compare(&((self)->contents[*(_index)] suffix), (needle)); \
+    if (comparison == 0) *(_exists) = true; \
+    else if (comparison < 0) *(_index) += 1; \
+  } while (0)
+
+/// Helper macro for the `_sorted_by` routines below. This takes the left (existing)
+/// parameter by reference in order to work with the generic sorting function above.
+#define _compare_int(a, b) ((int)*(a) - (int)(b))
+
+#ifdef _MSC_VER
+#pragma warning(default : 4101)
+#elif defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // TREE_SITTER_ARRAY_H_

editor/zed/tree-sitter-jdg/src/tree_sitter/parser.h

@@ -0,0 +1,265 @@
+#ifndef TREE_SITTER_PARSER_H_
+#define TREE_SITTER_PARSER_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#define ts_builtin_sym_error ((TSSymbol)-1)
+#define ts_builtin_sym_end 0
+#define TREE_SITTER_SERIALIZATION_BUFFER_SIZE 1024
+
+#ifndef TREE_SITTER_API_H_
+typedef uint16_t TSStateId;
+typedef uint16_t TSSymbol;
+typedef uint16_t TSFieldId;
+typedef struct TSLanguage TSLanguage;
+#endif
+
+typedef struct {
+  TSFieldId field_id;
+  uint8_t child_index;
+  bool inherited;
+} TSFieldMapEntry;
+
+typedef struct {
+  uint16_t index;
+  uint16_t length;
+} TSFieldMapSlice;
+
+typedef struct {
+  bool visible;
+  bool named;
+  bool supertype;
+} TSSymbolMetadata;
+
+typedef struct TSLexer TSLexer;
+
+struct TSLexer {
+  int32_t lookahead;
+  TSSymbol result_symbol;
+  void (*advance)(TSLexer *, bool);
+  void (*mark_end)(TSLexer *);
+  uint32_t (*get_column)(TSLexer *);
+  bool (*is_at_included_range_start)(const TSLexer *);
+  bool (*eof)(const TSLexer *);
+};
+
+typedef enum {
+  TSParseActionTypeShift,
+  TSParseActionTypeReduce,
+  TSParseActionTypeAccept,
+  TSParseActionTypeRecover,
+} TSParseActionType;
+
+typedef union {
+  struct {
+    uint8_t type;
+    TSStateId state;
+    bool extra;
+    bool repetition;
+  } shift;
+  struct {
+    uint8_t type;
+    uint8_t child_count;
+    TSSymbol symbol;
+    int16_t dynamic_precedence;
+    uint16_t production_id;
+  } reduce;
+  uint8_t type;
+} TSParseAction;
+
+typedef struct {
+  uint16_t lex_state;
+  uint16_t external_lex_state;
+} TSLexMode;
+
+typedef union {
+  TSParseAction action;
+  struct {
+    uint8_t count;
+    bool reusable;
+  } entry;
+} TSParseActionEntry;
+
+typedef struct {
+  int32_t start;
+  int32_t end;
+} TSCharacterRange;
+
+struct TSLanguage {
+  uint32_t version;
+  uint32_t symbol_count;
+  uint32_t alias_count;
+  uint32_t token_count;
+  uint32_t external_token_count;
+  uint32_t state_count;
+  uint32_t large_state_count;
+  uint32_t production_id_count;
+  uint32_t field_count;
+  uint16_t max_alias_sequence_length;
+  const uint16_t *parse_table;
+  const uint16_t *small_parse_table;
+  const uint32_t *small_parse_table_map;
+  const TSParseActionEntry *parse_actions;
+  const char * const *symbol_names;
+  const char * const *field_names;
+  const TSFieldMapSlice *field_map_slices;
+  const TSFieldMapEntry *field_map_entries;
+  const TSSymbolMetadata *symbol_metadata;
+  const TSSymbol *public_symbol_map;
+  const uint16_t *alias_map;
+  const TSSymbol *alias_sequences;
+  const TSLexMode *lex_modes;
+  bool (*lex_fn)(TSLexer *, TSStateId);
+  bool (*keyword_lex_fn)(TSLexer *, TSStateId);
+  TSSymbol keyword_capture_token;
+  struct {
+    const bool *states;
+    const TSSymbol *symbol_map;
+    void *(*create)(void);
+    void (*destroy)(void *);
+    bool (*scan)(void *, TSLexer *, const bool *symbol_whitelist);
+    unsigned (*serialize)(void *, char *);
+    void (*deserialize)(void *, const char *, unsigned);
+  } external_scanner;
+  const TSStateId *primary_state_ids;
+};
+
+static inline bool set_contains(TSCharacterRange *ranges, uint32_t len, int32_t lookahead) {
+  uint32_t index = 0;
+  uint32_t size = len - index;
+  while (size > 1) {
+    uint32_t half_size = size / 2;
+    uint32_t mid_index = index + half_size;
+    TSCharacterRange *range = &ranges[mid_index];
+    if (lookahead >= range->start && lookahead <= range->end) {
+      return true;
+    } else if (lookahead > range->end) {
+      index = mid_index;
+    }
+    size -= half_size;
+  }
+  TSCharacterRange *range = &ranges[index];
+  return (lookahead >= range->start && lookahead <= range->end);
+}
+
+/*
+ *  Lexer Macros
+ */
+
+#ifdef _MSC_VER
+#define UNUSED __pragma(warning(suppress : 4101))
+#else
+#define UNUSED __attribute__((unused))
+#endif
+
+#define START_LEXER()           \
+  bool result = false;          \
+  bool skip = false;            \
+  UNUSED                        \
+  bool eof = false;             \
+  int32_t lookahead;            \
+  goto start;                   \
+  next_state:                   \
+  lexer->advance(lexer, skip);  \
+  start:                        \
+  skip = false;                 \
+  lookahead = lexer->lookahead;
+
+#define ADVANCE(state_value) \
+  {                          \
+    state = state_value;     \
+    goto next_state;         \
+  }
+
+#define ADVANCE_MAP(...)                                              \
+  {                                                                   \
+    static const uint16_t map[] = { __VA_ARGS__ };                    \
+    for (uint32_t i = 0; i < sizeof(map) / sizeof(map[0]); i += 2) {  \
+      if (map[i] == lookahead) {                                      \
+        state = map[i + 1];                                           \
+        goto next_state;                                              \
+      }                                                               \
+    }                                                                 \
+  }
+
+#define SKIP(state_value) \
+  {                       \
+    skip = true;          \
+    state = state_value;  \
+    goto next_state;      \
+  }
+
+#define ACCEPT_TOKEN(symbol_value)     \
+  result = true;                       \
+  lexer->result_symbol = symbol_value; \
+  lexer->mark_end(lexer);
+
+#define END_STATE() return result;
+
+/*
+ *  Parse Table Macros
+ */
+
+#define SMALL_STATE(id) ((id) - LARGE_STATE_COUNT)
+
+#define STATE(id) id
+
+#define ACTIONS(id) id
+
+#define SHIFT(state_value)            \
+  {{                                  \
+    .shift = {                        \
+      .type = TSParseActionTypeShift, \
+      .state = (state_value)          \
+    }                                 \
+  }}
+
+#define SHIFT_REPEAT(state_value)     \
+  {{                                  \
+    .shift = {                        \
+      .type = TSParseActionTypeShift, \
+      .state = (state_value),         \
+      .repetition = true              \
+    }                                 \
+  }}
+
+#define SHIFT_EXTRA()                 \
+  {{                                  \
+    .shift = {                        \
+      .type = TSParseActionTypeShift, \
+      .extra = true                   \
+    }                                 \
+  }}
+
+#define REDUCE(symbol_name, children, precedence, prod_id) \
+  {{                                                       \
+    .reduce = {                                            \
+      .type = TSParseActionTypeReduce,                     \
+      .symbol = symbol_name,                               \
+      .child_count = children,                             \
+      .dynamic_precedence = precedence,                    \
+      .production_id = prod_id                             \
+    },                                                     \
+  }}
+
+#define RECOVER()                    \
+  {{                                 \
+    .type = TSParseActionTypeRecover \
+  }}
+
+#define ACCEPT_INPUT()              \
+  {{                                \
+    .type = TSParseActionTypeAccept \
+  }}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // TREE_SITTER_PARSER_H_

example/showcase/05-pattern-expansion.jdg

@@ -1,11 +1,20 @@
-// Автогенерация тестов из папки с файлами. Удобно когда тестов много и
+// Автогенерация тестов из файлов/папок. Покрывает четыре типовых сценария:
-// вручную выписывать каждый через test("...") { stdin = ... stdout = ... }
-// будет слишком громоздко.
 //
-// Два режима:
+//   1. Stdio-режим с парой globs     — классика: stdin из .in, stdout = .ans
-//   1) file-glob — пары .in/.ans файлов
+//   2. Shared expected               — N входов, один общий ожидаемый файл
-//   2) dir-mode — каждый тест лежит в своей подпапке с фиксированными
+//   3. File-mode по args             — программа читает файл по аргументу
-//      именами input/output файлов
+//   4. Dir-mode с input+output файлами — программа читает И пишет файлы
+//
+// Плейсхолдеры в `args` pattern'а:
+//   {input_path}  — путь к input-файлу текущего теста (для glob — разный,
+//                   для литерала — один и тот же во всех тестах)
+//   {output_path} — аналогично для output
+//   {name}        — wildcard-часть имени (glob) или basename директории (dir)
+//   {dir}         — dir-mode: полный путь к директории теста
+//
+// Правило режима: наличие `{input_path}` в args → input кладётся как InFile,
+// а не в stdin. Наличие `{output_path}` → expected сравнивается как OutFile,
+// а не stdout.
 
 toolchains {
     gcc { platforms = "linux" }
@@ -19,11 +28,10 @@ build "release" {
     profile  = release
 }
 
-// Режим 1: глобы на input и output файлы.
+// 1) Классика: каждая пара (*.in, *.ans) → один тест.
-// Тестом становится каждая пара (tests/*.in, tests/*.ans) с совпадающим
+//    Stdin ← .in, Stdout сравнивается с .ans.
-// базовым именем. Имя теста — имя файла без расширения.
+group("stdio-pair") {
-group("from-files") {
+    weight = 0.25
-    weight = 0.5
 
     pattern {
         input  = "tests/*.in"
@@ -31,22 +39,42 @@ group("from-files") {
     }
 }
 
-// Режим 2: каждый тест — подкаталог с фиксированным layout'ом.
+// 2) Один общий expected для всех входов.
-// Ожидается структура:
+//    Удобно для задач где «для любого корректного входа ответ одинаковый»
-//   cases/
+//    (edge-case fuzzing) или наоборот «все некорректные входы → error»
-//     01-basic/
+//    (смотрим на один и тот же файл с сообщением об ошибке).
-//       input.txt
+group("shared-output") {
-//       expected.txt
+    weight = 0.25
-//     02-edge/
-//       input.txt
-//       expected.txt
-// Имя теста — имя подкаталога.
-group("from-dirs") {
-    weight = 0.5
 
     pattern {
-        dirs   = "cases/*"
+        input  = "edge/*.in"
-        input  = "input.txt"
+        output = "edge/expected.ans"   // литерал без *
-        output = "expected.txt"
+    }
+}
+
+// 3) Программа читает файл по аргументу командной строки, а не из stdin.
+//    Expander создаёт InFiles[01.in]=..., запускает `./solution 01.in`,
+//    сравнивает stdout программы с содержимым соответствующего .ans.
+group("file-input") {
+    weight = 0.25
+
+    pattern {
+        input  = "file-tests/*.in"
+        output = "file-tests/*.ans"
+        args   = "{input_path}"
+    }
+}
+
+// 4) Программа и читает, и пишет через файлы — никакого stdin/stdout.
+//    Expander кладёт input в InFiles, expected в OutFiles, запускает
+//    `./solution in.txt out.txt` и сравнивает созданный out.txt с expected.
+group("file-io") {
+    weight = 0.25
+
+    pattern {
+        dirs   = "cases/*"          // каждая подпапка — отдельный тест
+        input  = "in.txt"
+        output = "out.txt"
+        args   = "{input_path}" "{output_path}"
     }
 }

example/showcase/07-include.jdg

@@ -0,0 +1,41 @@
+// Наследование общей конфигурации через `include`. Подключает соседний
+// common.jdg (тулчейны + build_defaults + глобальные настройки), а затем
+// задаёт только специфичные для этой задачи build-варианты и тесты.
+//
+// Пути в include относительны самому этому файлу (не CWD, не корню репо).
+// Абсолютные пути тоже работают. Циклические включения детектятся парсером.
+//
+// Локальные директивы поверх include могут переопределять:
+//   - скаляры в build_defaults (через последующий build_defaults-блок)
+//   - timeout / memory_limit / binary / sources / normalize_crlf / trim_trailing_ws
+// Но не могут переопределять:
+//   - toolchains с тем же именем (ошибка «duplicate toolchain»)
+//   - build с тем же именем
+//   - group с тем же именем
+
+include "common.jdg"
+
+build "release" {
+    profile = release
+}
+
+build "debug" {
+    profile  = debug
+    warnings = pedantic
+}
+
+build "sanitized" {
+    profile   = sanitized
+    sanitize  = "address" "undefined"
+    platforms = "linux"
+    compilers = "gcc" "clang"
+}
+
+group("basic") {
+    weight = 1.0
+
+    test("smoke") {
+        stdin  = "1\n42\n"
+        stdout = "42\n"
+    }
+}

example/showcase/common.jdg

@@ -0,0 +1,22 @@
+// Общая инфраструктура для всех задач курса: тулчейны и базовые настройки
+// билда. Подключается через `include "common.jdg"` из конкретных .jdg
+// файлов задач. Локальные build-блоки наследуют эти дефолты через
+// встроенный merge в build_defaults.
+
+toolchains {
+    gcc   { platforms = "linux" }
+    clang { platforms = "linux" "windows" }
+    msvc  { platforms = "windows" }
+}
+
+build_defaults {
+    language = "c"
+    standard = "c11"
+    sources  = "solution.c"
+    output   = "solution"
+    warnings = strict
+}
+
+timeout 5s
+normalize_crlf   = true
+trim_trailing_ws = true

runner/expander.go

@@ -16,7 +16,28 @@ func expandPattern(pattern *dsl.Pattern) ([]*dsl.Test, error) {
 	return expandGlobPattern(pattern)
 }
 
+type patternCase struct {
+	name       string
+	inputPath  string
+	outputPath string
+	dir        string
+}
+
 func expandGlobPattern(pattern *dsl.Pattern) ([]*dsl.Test, error) {
+	inputIsGlob := strings.Contains(pattern.InputGlob, "*")
+	outputIsGlob := strings.Contains(pattern.OutputGlob, "*")
+
+	if pattern.InputGlob == "" && pattern.OutputGlob == "" {
+		return nil, fmt.Errorf("pattern needs at least one of input/output/dirs")
+	}
+	if !inputIsGlob && !outputIsGlob {
+		return nil, fmt.Errorf("pattern needs at least one glob field (input or output must contain *)")
+	}
+
+	var cases []patternCase
+
+	switch {
+	case inputIsGlob && outputIsGlob:
 		inputFiles, err := filepath.Glob(pattern.InputGlob)
 		if err != nil {
 			return nil, fmt.Errorf("invalid input glob %q: %w", pattern.InputGlob, err)
@@ -24,39 +45,56 @@ func expandGlobPattern(pattern *dsl.Pattern) ([]*dsl.Test, error) {
 		if len(inputFiles) == 0 {
 			return nil, fmt.Errorf("no files matched input glob %q", pattern.InputGlob)
 		}
-
 		inputPrefix, inputSuffix := splitGlob(pattern.InputGlob)
 		outputPrefix, outputSuffix := splitGlob(pattern.OutputGlob)
-
-	var tests []*dsl.Test
 		for _, inputPath := range inputFiles {
 			wildcard := extractWildcard(inputPath, inputPrefix, inputSuffix)
 			outputPath := outputPrefix + wildcard + outputSuffix
-
+			cases = append(cases, patternCase{
-		inputContent, err := os.ReadFile(inputPath)
+				name:       wildcard,
-		if err != nil {
+				inputPath:  inputPath,
-			return nil, fmt.Errorf("read input %q: %w", inputPath, err)
+				outputPath: outputPath,
-		}
-		outputContent, err := os.ReadFile(outputPath)
-		if err != nil {
-			return nil, fmt.Errorf("read output %q: %w", outputPath, err)
-		}
-
-		name := fmt.Sprintf("pattern:%s", wildcard)
-		stdin := string(inputContent)
-		expected := string(outputContent)
-
-		tests = append(tests, &dsl.Test{
-			Name:     name,
-			Stdin:    &stdin,
-			Env:      map[string]string{},
-			InFiles:  map[string]string{},
-			OutFiles: map[string]string{},
-			Stdout:   dsl.ExactMatcher{Value: expected},
-			Stderr:   dsl.NoMatcher{},
 			})
 		}
-	return tests, nil
+
+	case inputIsGlob && !outputIsGlob:
+		inputFiles, err := filepath.Glob(pattern.InputGlob)
+		if err != nil {
+			return nil, fmt.Errorf("invalid input glob %q: %w", pattern.InputGlob, err)
+		}
+		if len(inputFiles) == 0 {
+			return nil, fmt.Errorf("no files matched input glob %q", pattern.InputGlob)
+		}
+		inputPrefix, inputSuffix := splitGlob(pattern.InputGlob)
+		for _, inputPath := range inputFiles {
+			wildcard := extractWildcard(inputPath, inputPrefix, inputSuffix)
+			cases = append(cases, patternCase{
+				name:       wildcard,
+				inputPath:  inputPath,
+				outputPath: pattern.OutputGlob,
+			})
+		}
+
+	case !inputIsGlob && outputIsGlob:
+		outputFiles, err := filepath.Glob(pattern.OutputGlob)
+		if err != nil {
+			return nil, fmt.Errorf("invalid output glob %q: %w", pattern.OutputGlob, err)
+		}
+		if len(outputFiles) == 0 {
+			return nil, fmt.Errorf("no files matched output glob %q", pattern.OutputGlob)
+		}
+		outputPrefix, outputSuffix := splitGlob(pattern.OutputGlob)
+		for _, outputPath := range outputFiles {
+			wildcard := extractWildcard(outputPath, outputPrefix, outputSuffix)
+			cases = append(cases, patternCase{
+				name:       wildcard,
+				inputPath:  pattern.InputGlob,
+				outputPath: outputPath,
+			})
+		}
+	}
+
+	return buildTests(cases, pattern.Args)
 }
 
 func expandDirPattern(pattern *dsl.Pattern) ([]*dsl.Test, error) {
@@ -68,42 +106,96 @@ func expandDirPattern(pattern *dsl.Pattern) ([]*dsl.Test, error) {
 		return nil, fmt.Errorf("no directories matched %q", pattern.DirsGlob)
 	}
 
-	var tests []*dsl.Test
+	var cases []patternCase
 	for _, dir := range dirs {
 		info, err := os.Stat(dir)
 		if err != nil || !info.IsDir() {
 			continue
 		}
-
+		cases = append(cases, patternCase{
-		inputPath := filepath.Join(dir, pattern.InputFile)
+			name:       filepath.Base(dir),
-		outputPath := filepath.Join(dir, pattern.OutputFile)
+			inputPath:  filepath.Join(dir, pattern.InputFile),
-
+			outputPath: filepath.Join(dir, pattern.OutputFile),
-		inputContent, err := os.ReadFile(inputPath)
+			dir:        dir,
-		if err != nil {
+		})
-			return nil, fmt.Errorf("read %q: %w", inputPath, err)
 	}
-		outputContent, err := os.ReadFile(outputPath)
+	return buildTests(cases, pattern.Args)
+}
+
+func buildTests(cases []patternCase, argTemplate []string) ([]*dsl.Test, error) {
+	useInputAsFile := argsContain(argTemplate, "{input_path}")
+	useOutputAsFile := argsContain(argTemplate, "{output_path}")
+
+	var tests []*dsl.Test
+	for _, c := range cases {
+		inputContent, err := os.ReadFile(c.inputPath)
 		if err != nil {
-			return nil, fmt.Errorf("read %q: %w", outputPath, err)
+			return nil, fmt.Errorf("read input %q: %w", c.inputPath, err)
+		}
+		outputContent, err := os.ReadFile(c.outputPath)
+		if err != nil {
+			return nil, fmt.Errorf("read output %q: %w", c.outputPath, err)
 		}
 
-		name := fmt.Sprintf("pattern:%s", filepath.Base(dir))
+		t := &dsl.Test{
-		stdin := string(inputContent)
+			Name:     fmt.Sprintf("pattern:%s", c.name),
-		expected := string(outputContent)
-
-		tests = append(tests, &dsl.Test{
-			Name:     name,
-			Stdin:    &stdin,
 			Env:      map[string]string{},
 			InFiles:  map[string]string{},
 			OutFiles: map[string]string{},
-			Stdout:   dsl.ExactMatcher{Value: expected},
 			Stderr:   dsl.NoMatcher{},
+		}
+
+		inputName := filepath.Base(c.inputPath)
+		outputName := filepath.Base(c.outputPath)
+
+		if useInputAsFile {
+			t.InFiles[inputName] = string(inputContent)
+		} else {
+			s := string(inputContent)
+			t.Stdin = &s
+		}
+
+		if useOutputAsFile {
+			t.OutFiles[outputName] = string(outputContent)
+			t.Stdout = dsl.NoMatcher{}
+		} else {
+			t.Stdout = dsl.ExactMatcher{Value: string(outputContent)}
+		}
+
+		if len(argTemplate) > 0 {
+			t.Args = substituteArgs(argTemplate, map[string]string{
+				"{input_path}":  inputName,
+				"{output_path}": outputName,
+				"{name}":        c.name,
+				"{dir}":         c.dir,
 			})
 		}
+
+		tests = append(tests, t)
+	}
 	return tests, nil
 }
 
+func argsContain(args []string, placeholder string) bool {
+	for _, a := range args {
+		if strings.Contains(a, placeholder) {
+			return true
+		}
+	}
+	return false
+}
+
+func substituteArgs(template []string, vars map[string]string) []string {
+	out := make([]string, len(template))
+	for i, a := range template {
+		for k, v := range vars {
+			a = strings.ReplaceAll(a, k, v)
+		}
+		out[i] = a
+	}
+	return out
+}
+
 func splitGlob(pattern string) (prefix, suffix string) {
 	before, after, found := strings.Cut(pattern, "*")
 	if !found {

runner/expander_test.go

@@ -0,0 +1,240 @@
+package runner
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/Mond1c/judge/dsl"
+)
+
+func writeFile(t *testing.T, dir, name, content string) {
+	t.Helper()
+	path := filepath.Join(dir, name)
+	if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(path, []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestExpandGlobPairedStdioMode(t *testing.T) {
+	dir := t.TempDir()
+	writeFile(t, dir, "tests/01.in", "1 2 3\n")
+	writeFile(t, dir, "tests/01.ans", "6\n")
+	writeFile(t, dir, "tests/02.in", "10 20\n")
+	writeFile(t, dir, "tests/02.ans", "30\n")
+
+	cwd, _ := os.Getwd()
+	defer os.Chdir(cwd)
+	os.Chdir(dir)
+
+	tests, err := expandPattern(&dsl.Pattern{
+		InputGlob:  "tests/*.in",
+		OutputGlob: "tests/*.ans",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(tests) != 2 {
+		t.Fatalf("expected 2 tests, got %d", len(tests))
+	}
+	for _, tc := range tests {
+		if tc.Stdin == nil {
+			t.Errorf("%s: stdin should be set in stdio mode", tc.Name)
+		}
+		if len(tc.Args) != 0 {
+			t.Errorf("%s: args should be empty without template", tc.Name)
+		}
+		if _, ok := tc.Stdout.(dsl.ExactMatcher); !ok {
+			t.Errorf("%s: stdout should be ExactMatcher, got %T", tc.Name, tc.Stdout)
+		}
+	}
+}
+
+func TestExpandGlobWithSharedOutput(t *testing.T) {
+	dir := t.TempDir()
+	writeFile(t, dir, "tests/01.in", "1\n")
+	writeFile(t, dir, "tests/02.in", "2\n")
+	writeFile(t, dir, "tests/03.in", "3\n")
+	writeFile(t, dir, "expected.ans", "ok\n")
+
+	cwd, _ := os.Getwd()
+	defer os.Chdir(cwd)
+	os.Chdir(dir)
+
+	tests, err := expandPattern(&dsl.Pattern{
+		InputGlob:  "tests/*.in",
+		OutputGlob: "expected.ans",
+	})
+	if err != nil {
+		t.Fatalf("expand: %v", err)
+	}
+	if len(tests) != 3 {
+		t.Fatalf("expected 3 tests, got %d", len(tests))
+	}
+	for _, tc := range tests {
+		m, ok := tc.Stdout.(dsl.ExactMatcher)
+		if !ok {
+			t.Fatalf("%s: stdout should be ExactMatcher, got %T", tc.Name, tc.Stdout)
+		}
+		if m.Value != "ok\n" {
+			t.Errorf("%s: shared output = %q, want %q", tc.Name, m.Value, "ok\n")
+		}
+	}
+}
+
+func TestExpandGlobFileModeInputOnly(t *testing.T) {
+	dir := t.TempDir()
+	writeFile(t, dir, "tests/01.in", "hello\n")
+	writeFile(t, dir, "tests/01.ans", "HELLO\n")
+
+	cwd, _ := os.Getwd()
+	defer os.Chdir(cwd)
+	os.Chdir(dir)
+
+	tests, err := expandPattern(&dsl.Pattern{
+		InputGlob:  "tests/*.in",
+		OutputGlob: "tests/*.ans",
+		Args:       []string{"{input_path}"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(tests) != 1 {
+		t.Fatalf("expected 1 test, got %d", len(tests))
+	}
+	tc := tests[0]
+	if tc.Stdin != nil {
+		t.Errorf("stdin should be nil in file mode for input")
+	}
+	if content, ok := tc.InFiles["01.in"]; !ok || content != "hello\n" {
+		t.Errorf("InFiles[01.in] = %q, want %q", content, "hello\n")
+	}
+	if _, ok := tc.Stdout.(dsl.ExactMatcher); !ok {
+		t.Errorf("stdout should still be ExactMatcher when output not in file mode, got %T", tc.Stdout)
+	}
+	if len(tc.Args) != 1 || tc.Args[0] != "01.in" {
+		t.Errorf("args = %v, want [01.in]", tc.Args)
+	}
+}
+
+func TestExpandGlobFileModeBoth(t *testing.T) {
+	dir := t.TempDir()
+	writeFile(t, dir, "tests/01.in", "1 2 3\n")
+	writeFile(t, dir, "tests/01.ans", "6\n")
+
+	cwd, _ := os.Getwd()
+	defer os.Chdir(cwd)
+	os.Chdir(dir)
+
+	tests, err := expandPattern(&dsl.Pattern{
+		InputGlob:  "tests/*.in",
+		OutputGlob: "tests/*.ans",
+		Args:       []string{"{input_path}", "{output_path}"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	tc := tests[0]
+	if tc.Stdin != nil {
+		t.Error("stdin should be nil")
+	}
+	if _, ok := tc.Stdout.(dsl.NoMatcher); !ok {
+		t.Errorf("stdout should be NoMatcher when output is file, got %T", tc.Stdout)
+	}
+	if content := tc.OutFiles["01.ans"]; content != "6\n" {
+		t.Errorf("OutFiles[01.ans] = %q, want %q", content, "6\n")
+	}
+	if len(tc.Args) != 2 || tc.Args[0] != "01.in" || tc.Args[1] != "01.ans" {
+		t.Errorf("args = %v, want [01.in 01.ans]", tc.Args)
+	}
+}
+
+func TestExpandGlobArgsWithStaticAndPlaceholders(t *testing.T) {
+	dir := t.TempDir()
+	writeFile(t, dir, "tests/01.in", "x\n")
+	writeFile(t, dir, "tests/01.ans", "x\n")
+
+	cwd, _ := os.Getwd()
+	defer os.Chdir(cwd)
+	os.Chdir(dir)
+
+	tests, err := expandPattern(&dsl.Pattern{
+		InputGlob:  "tests/*.in",
+		OutputGlob: "tests/*.ans",
+		Args:       []string{"--mode", "strict", "{input_path}"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(tests[0].Args) != 3 || tests[0].Args[0] != "--mode" || tests[0].Args[2] != "01.in" {
+		t.Errorf("args = %v", tests[0].Args)
+	}
+}
+
+func TestExpandDirModeWithArgs(t *testing.T) {
+	dir := t.TempDir()
+	writeFile(t, dir, "cases/a/input.txt", "one\n")
+	writeFile(t, dir, "cases/a/expected.txt", "ONE\n")
+	writeFile(t, dir, "cases/b/input.txt", "two\n")
+	writeFile(t, dir, "cases/b/expected.txt", "TWO\n")
+
+	cwd, _ := os.Getwd()
+	defer os.Chdir(cwd)
+	os.Chdir(dir)
+
+	tests, err := expandPattern(&dsl.Pattern{
+		DirsGlob:   "cases/*",
+		InputFile:  "input.txt",
+		OutputFile: "expected.txt",
+		Args:       []string{"{input_path}", "{output_path}"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(tests) != 2 {
+		t.Fatalf("expected 2 tests, got %d", len(tests))
+	}
+	for _, tc := range tests {
+		if _, ok := tc.InFiles["input.txt"]; !ok {
+			t.Errorf("%s: missing InFiles[input.txt]", tc.Name)
+		}
+		if _, ok := tc.OutFiles["expected.txt"]; !ok {
+			t.Errorf("%s: missing OutFiles[expected.txt]", tc.Name)
+		}
+		if len(tc.Args) != 2 {
+			t.Errorf("%s: args = %v", tc.Name, tc.Args)
+		}
+	}
+}
+
+func TestExpandPatternRejectsAllLiterals(t *testing.T) {
+	_, err := expandPattern(&dsl.Pattern{
+		InputGlob:  "tests/a.in",
+		OutputGlob: "tests/a.ans",
+	})
+	if err == nil {
+		t.Fatal("expected error when no glob fields")
+	}
+	if !strings.Contains(err.Error(), "glob") {
+		t.Errorf("error %q does not mention glob", err.Error())
+	}
+}
+
+func TestExpandPatternNoMatches(t *testing.T) {
+	dir := t.TempDir()
+	cwd, _ := os.Getwd()
+	defer os.Chdir(cwd)
+	os.Chdir(dir)
+
+	_, err := expandPattern(&dsl.Pattern{
+		InputGlob:  "missing/*.in",
+		OutputGlob: "missing/*.ans",
+	})
+	if err == nil {
+		t.Fatal("expected error on zero matches")
+	}
+}