Comments (1)
A typical way you approach this problem (for nearly every parsing system) is to define a quoted string as consisting of a zero or more runs where each run is either
- One or more characters other than
"
or\\
- An escape sequence where you explicitly enumerate the escaped characters you accept, including
\"
Something like:
let quotedStringChars = Capture(name: "chars", (!OneOf("\\\"") • OneOf(any))+)
let escapeSequence = "\\" • Capture(name: "escape", OneOf("bnrtv\""))
let quotedStringContent = quotedStringChars / escapeSequence
let quotedString = "\"" • quotedStringContent* • "\""
Handling this requires combining the resulting series of captures, mapping the escape character code to its equivalent (e.g. "n"
maps to "\n"
) before doing anything with the Match.
from patterns.
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from patterns.