HCL Parser doesn't support escaping double quote sign in String literals

[mccartney]

What is the smallest, simplest way to reproduce the problem?

    @Test
    void quoteEscaping() {
        rewriteRun(
          hcl(
            """
              locals {
                quotedText = "this is a double quote: \". Look at me"
              }
              """
          )
        );
    }

What is the full stack trace of any errors you encountered?

[...]
Caused by: org.openrewrite.hcl.HclParsingException: Syntax error in file.tf at line 2:54 token recognition error at: '\n'.
	at org.openrewrite.hcl.HclParser$ForwardingErrorListener.syntaxError(HclParser.java:105)
	... 132 more
Caused by: LexerNoViableAltException('\n')
	at org.antlr.v4.runtime.atn.LexerATNSimulator.failOrAccept(LexerATNSimulator.java:309)
	at org.antlr.v4.runtime.atn.LexerATNSimulator.execATN(LexerATNSimulator.java:230)
	at org.antlr.v4.runtime.atn.LexerATNSimulator.match(LexerATNSimulator.java:114)
	at org.antlr.v4.runtime.Lexer.nextToken(Lexer.java:141)
	... 129 more

Context

AFAICT this is a valid Terraform/HCL file.
https://developer.hashicorp.com/terraform/language/expressions/strings#escape-sequences says this is the proper way of escaping the quote sign.

[mccartney]

Actually I think the description above is wrong. This line:

                quotedText = "this is a double quote: \". Look at me"

"renders" to:

                quotedText = "this is a double quote: ". Look at me"

in HCL.

The backslash is basically swallowed by Java as hinted by Intelli:

And if so, the HCL file provided in the test is not a valid Terraform/HCL file. And Rewrite is right when failing.

Sorry for the noise.