تعبير

Compile نص patterns to regex via ↦ regex.

Syntax: <نص> ↦ تعبير

Category#

literal

Related#

• اقرأ
• conversio
• حرر

Examples#

radix/corpus/literalia/regex.fab (canonical · conversio)#

Compile نص patterns to regex via ↦ regex.

# =============================================================================
# تعبير — Compile نص patterns to تعبير via ↦ تعبير.
# =============================================================================
#
# What this teaches:
#   • converting نص strings to compiled تعبير with `↦ تعبير`
#   • inline تعبير flags like `(?i)` for case-insensitive matching
#   • combining `§` template application with تعبير حوّل for dynamic patterns
#
# Common mistakes:
#   • Forgetting that ↦ تعبير requires a نص or أسكي source — عدد and other types must convert to نص first.
#
# See also: اقرأ, تحويل, حرر
# =============================================================================

# literalia/regex — نص ↦ تعبير تحويل
#
# GRAMMAR:
#   تحويل :← stringLit '↦' 'تعبير'
#   templateExpr :← stringLit '(' exprList ')'   -- then ↦ تعبير on the نص result
#
# EXPECTED OUTPUT:
#   Regex pattern diagnostics for literals, inline flags, and a template-built path.
#
# BACKEND:
#   Cross-ref اقرأ/lege.fab for تعبير beside stdin reads.
#   Cross-ref حرر/scriptum.fab for § template application.

main {
    const تعبير digits ← "\d+" ↦ تعبير
    print digits
    const تعبير word ← "(?i)\w+" ↦ تعبير
    print word

    # Template application → نص, then تحويل to تعبير (dynamic path segments)
    const string tenant ← "acme"
    const تعبير homePath ← "/home/§/.*"(tenant) ↦ تعبير
    print homePath
}

Expected output:

\d+
(?i)\w+
/home/acme/.*