ts-node REPL: error on multiline function arguments

Functions with arguments declared in one line work in ts-node REPL:

> ts-node 
> function myFn(a: string, b: string) {
...   console.log(a, b)
...   return a
... }
undefined
> myFn('test', '!')
test !
'test'

Trying to paste function with multline arguments declaration into ts-node REPL:

function myFn2(
  a: string,
  b: string
) {
  console.log(a, b)
  return a
}

result:

> ts-node
> function myFn2(
<repl>.ts:9:10 - error TS2391: Function implementation is missing or not immediately following the declaration.
             
9 function myFn2(
           ~~~~~
<repl>.ts:9:10 - error TS7010: 'myFn2', which lacks return-type annotation, implicitly has an 'any' return type.

9 function myFn2(
           ~~~~~
<repl>.ts:10:1 - error TS1005: ')' expected.

Specifications

> ts-node -vv       
ts-node v10.6.0
node v14.16.1
compiler v4.2.3

Operating system and version:

> cat /etc/lsb-release
DISTRIB_ID=LinuxMint
DISTRIB_RELEASE=19
DISTRIB_CODENAME=tara
DISTRIB_DESCRIPTION="Linux Mint 19 Tara"
> cat /etc/upstream-release/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04 LTS"

I'm guessing you are hitting a limitation in our known set of RECOVERY_CODES:

ts-node/src/repl.ts

Lines 671 to 683 in 30f03e1

    
           /** 
        
            * TS diagnostic codes which are recoverable, meaning that the user likely entered and incomplete line of code 
        
            * and should be prompted for the next.  For example, starting a multi-line for() loop and not finishing it. 
        
            */ 
        
           const RECOVERY_CODES: Set<number> = new Set([ 
        
             1003, // "Identifier expected." 
        
             1005, // "')' expected." 
        
             1109, // "Expression expected." 
        
             1126, // "Unexpected end of text." 
        
             1160, // "Unterminated template literal." 
        
             1161, // "Unterminated regular expression literal." 
        
             2355, // "A function whose declared type is neither 'void' nor 'any' must return a value." 
        
           ]);

Fix TypeStrong#1667 multiline function arguments support in REPL

@cspotcode

@cspotcode, created #1677 pull request

Fix #1667 multiline function arguments support in REPL (#1677)

Update dependency ts-node to v10.8.0 (#1367)

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ts-node REPL: error on multiline function arguments #1667

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	/**
	* TS diagnostic codes which are recoverable, meaning that the user likely entered and incomplete line of code
	* and should be prompted for the next. For example, starting a multi-line for() loop and not finishing it.
	*/
	const RECOVERY_CODES: Set<number> = new Set([
	1003, // "Identifier expected."
	1005, // "')' expected."
	1109, // "Expression expected."
	1126, // "Unexpected end of text."
	1160, // "Unterminated template literal."
	1161, // "Unterminated regular expression literal."
	2355, // "A function whose declared type is neither 'void' nor 'any' must return a value."
	]);

ts-node REPL: error on multiline function arguments #1667

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cspotcode commented on Mar 2, 2022

d9k commented on Mar 4, 2022

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