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Orkuncakilkaya 1b9789630a Phase 7h: string slicing s[a..b] (retire substr) 
`s[a..b]` is a fresh substring of the bytes [a, b) — the modern, end-based form
of the C-style `substr(s, start, count)`:

  substr(src, start, i - start)   -> src[start..i]
  substr(t, 2, len(t) - 2)        -> t[2..len(t)]
  substr(src, i, 2)               -> src[i..i + 2]

Mechanics: a new E_SLICE postfix (`base[lo..hi]`, distinct from `base[i]`
indexing) lowers to a @fn_str_slice prelude (malloc + copy + terminate), emitted
once into any program that slices. Two reseeds: add the syntax + prelude, then
migrate the 22 substr calls and delete substr. The migrator recognises the
common `count == end - start` shape and emits the clean `s[start..end]` rather
than `s[start..start + (end - start)]`.

examples/strings.ludic gains slicing (now prints 1..9). Reseeded (22673 lines);
C-free fixpoint holds; goldens identical; 18/18; vocab + doc-fences clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-28 01:35:24 +03:00
..
golden Baseline: Ludic compiler + toolchain, Phase 1 syntax fixes complete 2026-08-27 15:15:35 +03:00
tests Phase 7e: polymorphic print(x) + str(x) (retire print_int/print_str) 2026-08-28 01:22:38 +03:00
ast.ludic Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
bootstrap-cfree.sh Phase 6a: rename core vocabulary (game/main/component/archetype/system) 2026-08-27 18:22:13 +03:00
bootstrap.sh Baseline: Ludic compiler + toolchain, Phase 1 syntax fixes complete 2026-08-27 15:15:35 +03:00
buf.ludic Phase 7b: null literal + x == null (retire ptr_null/ptr_is_null) 2026-08-28 00:50:21 +03:00
build.sh Phase 6a: rename core vocabulary (game/main/component/archetype/system) 2026-08-27 18:22:13 +03:00
compile.sh Baseline: Ludic compiler + toolchain, Phase 1 syntax fixes complete 2026-08-27 15:15:35 +03:00
emit_addr.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_core.ludic Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
emit_decl.ludic Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
emit_ecs.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_expr.ludic Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
emit_game.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_head.ludic Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
emit_intrin.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_intrin2.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_machine.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_math.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_new.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_query.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_save.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_spawn.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_stmt.ludic Phase 7g: the compiler builds its IR with interpolation, not + 2026-08-28 01:30:37 +03:00
emit_ui.ludic Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
game-build.sh Baseline: Ludic compiler + toolchain, Phase 1 syntax fixes complete 2026-08-27 15:15:35 +03:00
io.ludic Phase 7b: null literal + x == null (retire ptr_null/ptr_is_null) 2026-08-28 00:50:21 +03:00
lex.ludic Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
ludicc.seed.ll Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
main.ludic Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
parse.ludic Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
parse_game.ludic Phase 7c: string operators + and ==/!= (retire streq/sconcat) 2026-08-28 01:05:36 +03:00
reseed.sh Phase 6a: rename core vocabulary (game/main/component/archetype/system) 2026-08-27 18:22:13 +03:00
str.ludic Phase 7h: string slicing s[a..b] (retire substr) 2026-08-28 01:35:24 +03:00
test.sh Baseline: Ludic compiler + toolchain, Phase 1 syntax fixes complete 2026-08-27 15:15:35 +03:00