harlanhaskins

Keybase proof

I hereby claim:

• I am harlanhaskins on github.
• I am harlanhaskins (https://keybase.io/harlanhaskins) on keybase.
• I have a public key ASAaLSbIdUmM-i3WHBBB-TdELlHJc_NXNetHa6sBSxxqzAo

To claim this, I am signing this object:

harlanhaskins

import Foundation
import SwiftSyntax

func main() throws {
    guard CommandLine.arguments.count > 1 else {
        print("usage: swift-format [file]")
        exit(-1)
    }

    let url = URL(fileURLWithPath: CommandLine.arguments[1])

harlanhaskins

Require Import String Arith List Bool Ascii.
Scheme Equality for string.

(*
 * The Simply-Typed Lambda Calculus
 *)

(*
 * Two base types:
 *  - Integers (natural numbers)

harlanhaskins

Definition bind_option (A: Type) (B: Type) (opt: option A) (f: A -> option B): option B :=
  match opt with
  | Some v => f v
  | None => None
  end.

Definition return_option (A: Type) (a: A) := Some a.

(* return a >>= f = f a *)
Theorem left_identity_option A B a f:

harlanhaskins

#!/usr/bin/env swift

import EventKit

let eventStore = EKEventStore()

extension String: Error {}

func deleteBadEvents(calendarName: String) throws {
    // Make dates for Fall Semester 2017 before exams

harlanhaskins

use std::env;

fn print_spongebob(vals: &[String]) {
    let statement = vals.join(" ");
    let mut lower = true;
    for c in statement.chars() {
        let new_c = if lower { c.to_lowercase().next() }
                        else { c.to_uppercase().next() };
        if let Some(c) = new_c {
            print!("{}", c);

harlanhaskins

Automatic Reference Counting

Previously, Trill used the TinyGC garbage collector to manage memory allocated by indirect types. This garbage collector, though able to clean up these heap structures, does not afford the ability to introspect a data structure for its references, which is necessary to implement Copy on Write. As such, we have elected to move to an Automatic Reference Counting model for automatically managing the allocation of indirect types in the Trill language.

What is ARC?

harlanhaskins

// <none>:2:18
let __llvm__: Int 

// <none>:3:19
let __clang__: Int 

// <none>:4:25
let __clang_major__: Int 

// <none>:5:25

harlanhaskins

(var_assign_decl <none>:2:18 kind="global" modifiers="implicit" mutable=false name="__llvm__" type="Int"
  (num_expr <none>:2:18 raw="1" type="Int" value=1))
(var_assign_decl <none>:3:19 kind="global" modifiers="implicit" mutable=false name="__clang__" type="Int"
  (num_expr <none>:3:19 raw="1" type="Int" value=1))
(var_assign_decl <none>:4:25 kind="global" modifiers="implicit" mutable=false name="__clang_major__" type="Int"
  (num_expr <none>:4:25 raw="3" type="Int" value=3))
(var_assign_decl <none>:5:25 kind="global" modifiers="implicit" mutable=false name="__clang_minor__" type="Int"
  (num_expr <none>:5:25 raw="9" type="Int" value=9))
(var_assign_decl <none>:6:30 kind="global" modifiers="implicit" mutable=false name="__clang_patchlevel__" type="Int"
  (num_expr <none>:6:30 raw="1" type="Int" value=1))

harlanhaskins

Name: cllvm
Description: The llvm library
Version: 3.9.1
Libs: -L/usr/local/Cellar/llvm/3.9.1/lib -lLLVMLTO -lLLVMObjCARCOpts -lLLVMSymbolize -lLLVMDebugInfoPDB -lLLVMDebugInfoDWARF -lLLVMGlobalISel -lLLVMCoverage -lLLVMTableGen -lLLVMOrcJIT -lLLVMMIRParser -lLLVMNVPTXCodeGen -lLLVMNVPTXDesc -lLLVMNVPTXInfo -lLLVMNVPTXAsmPrinter -lLLVMARMDisassembler -lLLVMARMCodeGen -lLLVMARMAsmParser -lLLVMARMDesc -lLLVMARMInfo -lLLVMARMAsmPrinter -lLLVMAMDGPUDisassembler -lLLVMAMDGPUCodeGen -lLLVMAMDGPUAsmParser -lLLVMAMDGPUDesc -lLLVMAMDGPUInfo -lLLVMAMDGPUAsmPrinter -lLLVMAMDGPUUtils -lLLVMObjectYAML -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMDebugInfoCodeView -lLLVMX86Desc -lLLVMMCDisassembler -lLLVMX86Info -lLLVMX86AsmPrinter -lLLVMX86Utils -lLLVMMCJIT -lLLVMLibDriver -lLLVMOption -lLLVMLineEditor -lLLVMPasses -lLLVMipo -lLLVMVectorize -lLLVMLinker -lLLVMIRReader -lLLVMAsmParser -lLLVMInterpreter -lLLVMExecutionEngine -lLLVMRuntimeDyld -lLLVMObject -lLLVMMCParser