tree 526dc5a302c3e941287583adc2fe62c7af1d60a7
parent 61edf2f587ac908569ed3c6883d00eac16a3c185
author Tim Keith <tkeith@nvidia.com> 1616610322 -0700
committer Copybara-Service <copybara-worker@google.com> 1616703967 -0700

[flang] Save binding labels as strings

Binding labels start as expressions but they have to evaluate to
constant character of default kind, so they can be represented as an
std::string. Leading and trailing blanks have to be removed, so the
folded expression isn't exactly right anyway.

So all BIND(C) symbols now have a string binding label, either the
default or user-supplied one. This is recorded in the .mod file.

Add WithBindName mix-in for details classes that can have a binding
label so that they are all consistent. Add GetBindName() and
SetBindName() member functions to Symbol.

Add tests that verifies that leading and trailing blanks are ignored
in binding labels and that the default label is folded to lower case.

Differential Revision: https://reviews.llvm.org/D99208

GitOrigin-RevId: 5d3249e9af9086a29214312af18651ebb769eb71