feat: integer width support (u8-u248, i8-i248)#70
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brockelmore merged 1 commit intomainfrom Mar 11, 2026
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…c and type safety Add sub-256-bit integer types with full checked arithmetic, compile-time overflow detection, mixed-width/signedness rejection, unsuffixed literal type adoption, type casting, and signed opcode selection. - Literal type suffixes (42u8, 0xffi16) through lexer→parser→AST→IR - Cast syntax (expr as u8) with mask/sign-extend - Width-checked add/sub/mul that reverts on overflow for sub-256-bit types - Compile-time constant overflow detection with span-preserving diagnostics - Post-egglog overflow detection for optimization-revealed cases - Narrow-type-preserving egglog constant folding rules - Mixed-width rejection (u8 + u256 → error suggesting explicit cast) - Signed/unsigned mismatch rejection (i8 + u8 → error) - Unsuffixed literals adopt the type of the other operand - Signed opcodes (SDIV, SMOD, SLT, SGT, SAR) for IntT types - Sign-extend for signed type truncation - Paren expression type inference in infer_expr_type - 72 new e2e tests (35 unsigned, 37 signed) covering checked arithmetic, overflow reverts, boundary cases, unsafe wrapping, casts, comparisons, negation, compile-time error messages, and mixed-width rejection Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
u8-u248,i8-i248) with full checked arithmetic, compile-time overflow detection, and type safety42u8,0xffi16), cast syntax (expr as u8), signed opcode selection (SDIV, SMOD, SLT, SGT, SAR)Test plan
cargo +nightly fmtcleanjust check-clippy-ciclean🤖 Generated with Claude Code