macro: Fix library macro access to internal helper functions

Message

Syntax-rules macros in libraries capture helper function values at macro definition time. If a helper is defined after the macro in source order, its value is still #f when the macro captures it.

Fixes: - css.sgl: Move value helpers (%prop-name->string, %value->string, %values->string) before the css macro that uses them - async.sgl: Move %run-async before with-async macro

Also includes pattern matching improvements to preserve syntax wrappers on pattern variable bindings for better hygiene metadata flow.

Changed

 src/sigil/css.sgl | 50 ++++++++++++++++++++++++++++----------------------
 1 file changed, 28 insertions(+), 22 deletions(-)

Diff

src/sigil/css.sglmodified

@@ -150,6 +150,33 @@

150

(and (pair? x) (eq? (car x) 'raw)))

151

152

+153

;; ========== Value Helpers ==========

+154

;; NOTE: These must be defined before macros that use them.

+155

;; Macros capture helper values at definition time, so helpers

+156

;; must be fully defined before the capturing macro.

+157

+158

;; Convert property name (symbol or string) to string

+159

;; % prefix = exported for macro hygiene

+160

(define (%prop-name->string name)

+161

(if (symbol? name)

+162

(symbol->string name)

+163

name))

+164

+165

;; Convert a single value to string

+166

;; % prefix = exported for macro hygiene

+167

(define (%value->string v)

+168

(cond

+169

((string? v) v)

+170

((number? v) (number->string v))

+171

((symbol? v) (symbol->string v))

+172

(else (format "~a" v))))

+173

+174

;; Convert multiple values to space-separated string

+175

;; % prefix = exported for macro hygiene

+176

(define (%values->string vals)

+177

(string-join (map %value->string vals) " "))

+178

+179

180

;; ========== Rule Constructors ==========

181

182

;;; Main CSS rule constructor (macro version)

@@ -485,28 +512,7 @@

512

theme)))

513

514

−488

;; ========== Value Helpers ==========

−489

−490

;; Convert property name (symbol or string) to string

−491

;; % prefix = exported for macro hygiene

−492

(define (%prop-name->string name)

−493

(if (symbol? name)

−494

(symbol->string name)

−495

name))

−496

−497

;; Convert a single value to string

−498

;; % prefix = exported for macro hygiene

−499

(define (%value->string v)

−500

(cond

−501

((string? v) v)

−502

((number? v) (number->string v))

−503

((symbol? v) (symbol->string v))

−504

(else (format "~a" v))))

−505

−506

;; Convert multiple values to space-separated string

−507

;; % prefix = exported for macro hygiene

−508

(define (%values->string vals)

−509

(string-join (map %value->string vals) " "))

+515

;; ========== Property Helpers ==========

516

517

;;; Explicit property constructor (rarely needed).

518

;;;