RScript lexer exception when inserting double quotes in a built string

Technical Questions URScript
1

Hi everyone,

I’m developing a URCap and hit a lexer exception in PolyScope when trying to generate a string that includes a tag in double quotes.
Target structure (example):

["testtag",2,3,4,5,6]

When building this dynamically, PolyScope fails before execution with a lexer error.

Where it happens (minimal repro):

assignment = str_cat(str_cat("[\"", tag), "\",")

Error shown by PolyScope:

Lexer ...:
assignment = str_cat(str_cat("[\"", tag), "\",")

From my observations, this is a tokenization (lexical parsing) issue: URScript’s lexer struggles with escaped double quotes (\") in certain concatenation contexts, even though the code looks syntactically valid.

Has anyone found a reliable workaround to safely insert double quotes into dynamically constructed strings in URScript?

Thanks,
Halit

2

Doesn’t seem like UR has ever implemented this Feature. Posts from years ago mention just making 2 single quotes. No idea if what you’re using it for will interpret that properly.

You said you’re using a URCap, is it possible to have the CAP do whatever dynamic generation you’re trying to achieve?

3

Thanks, Eric!
Yes, I’m using a URCap. The issue happens before runtime when PolyScope’s lexer hits escaped quotes in str_cat().
Even simple cases like

["testtag",2,3,4]

fail to parse.
I’ll probably build the full string on the Java side instead.