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fix(compiler): == / != on references is identity; only text compares by content

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emit_bin_vals lowered every pointer-typed ==/!= to @lp_str_eq, so two
distinct records compared their bytes up to the first zero byte. Content
compare now needs both sides to be text (string, or the untyped
pointer/ptr runtime code carries text in); other references use
icmp eq ptr, and string vs a non-text reference is a compile error.
Adds selfhost/tests/identity.ludic; both seeds regenerated.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-16 16:06:31 +03:00
parent e010c2cecc
commit 1900f9ca80
7 changed files with 19750 additions and 19403 deletions
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LANGUAGE.md
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@ -1011,7 +1011,8 @@ are **`& | ^ << >> ~`** (`>>` is a logical/unsigned shift).
**Strings are values.** `a + b` concatenates two strings, and `a == b` / `a != b`
compare them **by content** (not by pointer). `"go" + dir == "goleft"` works as
written. (Under the hood these call a small emitted string runtime; a `==`/`!=`
against `null` is still a pointer test.)
against `null` is still a pointer test. Every other reference — records, slices,
enums — compares by identity, and comparing a string with one is a compile error.)
**Interpolation is the readable way to build them.** A backtick string
`` `text {expr} text` `` embeds any expression in `{…}` — numbers, bools and