làm

Starts a scoped do-while style loop.

Aliases: do

Syntax: làm <block> [bắt <name> <block>] [trong_khi <condition>]

Category#

control-flow

Related#

• trong_khi
• bắt
• đóng
• tiếp

Examples#

radix/corpus/fac/fac-cape.fab (canonical · keyword)#

Starts a scoped do-while style loop.

# =============================================================================
# làm — Starts a scoped do-while style loop
# =============================================================================
#
# What this teaches:
#   • Starts a scoped do-while style loop.
#   • Related keywords: trong_khi, bắt, đóng, tiếp
#
# Common mistakes:
#   • Using `bắt` on a non-`làm` block — `bắt` only attaches to `làm` statements, not arbitrary blocks.
#
# See also: trong_khi, bắt, đóng, tiếp
# =============================================================================

# làm — try block with bắt error handler
#
# làm { <body> }
# bắt err { <handler> }
#
# GRAMMAR:
#   facStmt :← 'làm' block 'bắt' ident block
#
# EXPECTED OUTPUT:
#   none — success path then simulated failure on attempt 2
#
# BACKEND:
#   Rust/Go: làm/cape not yet emitted — compile-only smoke.

main {
    do {
        print "Block executed successfully"
    }
    catch err {
        print "Caught error: §"(err.nuntius)
    }

    # ném on second attempt; bắt recovers and prints err.nuntius
    var int attempts ← 0
    do {
        attempts ← attempts + 1
        print "Attempt §"(attempts)
        if attempts ≡ 2 {
            throw "Simulated failure"
        }
    }
    catch err {
        print "Failed on attempt §: §"(attempts, err.nuntius)
    }
}