[SR-1743] REPL doesn't handle multiline comments

[swift-ci]

Previous ID	SR-1743
Radar	None
Original Reporter	amasad (JIRA User)
Type	Bug

Environment

Linux ubuntu 15
Swift version 3.0-dev (LLVM b361b0fc05, Clang 11493b0f62, Swift 24a0c3d)

Additional Detail from JIRA

Votes	3
Component/s	LLDB for Swift
Labels	Bug, REPL
Assignee	None
Priority	Medium

md5: 2215125dbc4176bab8cc45b90b06d4ca

Issue Description:

To reproduce:

In test.swift:

/*
hello world
*/
print("hello world")

Run:

cat test.swift | swift

Output:

Welcome to Swift version 3.0-dev (LLVM b361b0fc05, Clang 11493b0f62, Swift 24a0c3de75). Type :help for assistance.
<REPL>:3:6: error: unterminated '/*' comment
#line
     ^
     */
<REPL>:2:1: note: comment started here
/*
^

repl.swift:1:6: error: consecutive statements on a line must be separated by ';'
hello world
     ^
     ;

<REPL>:2:1: error: unexpected end of block comment
*/
^

hello world

Notice the errors about the comment.

The reason I'm piping into the REPL is because I use it programmatically (As a child process from another program) and that means it's not in TTY mode. Everything else work (including multiline code).

[belkadan]

Do you need to use the REPL, or can you just use the script interpreter?

cat test.swift | swift -

[swift-ci]

Comment by Amjad Masad (JIRA)

As briefly mentioned in the description: I'm using the REPL programmatically, I'm starting the process from my program and writing code through stdin to it and parsing the output. This is because I'm adding support for swift it on my online REPL website: https://repl.it

So I need this to be interactive and stateful. The script interpreter exits after it finishes running the current script.

Let me know if there is a better way of doing this. It works pretty well, and I'm hacking around this issue by stripping multiline comments.