split-escaped-quote (C171)

Fix is always available.

What it does

Checks for Fortran-escaped quotes in string literals that have been split over two lines.

Why is this bad?

In Fortran string literals, literal (escaped) double or single quotes are denoted with two characters: "" or ''. A surprising Fortran feature is the ability to split tokens over multiple lines, including these escaped quotes. The result is that it's possible to mistake such a split escaped quote with implicit concatenation of string literals, a feature in other languages but not in Fortran. Splitting escaped quotes is practically never desired, and can be safely replaced with a simple line continuation.

Example

print*, "this looks like implicit "&
     &" concatenation but isn't"
end

Use instead:

print*, "this looks like implicit&
     & concatenation but isn't"
end