Differential revision: https://reviews.llvm.org/D26795

llvm-svn: 287547

skip() and skip(StringRef) were overloaded functions that
have different semantics. This patch rename one of the functions
to avoid function overloading.

llvm-svn: 284396

Most functions that return StringRef should check their return values,
so I'm planning on marking StringRef [[nodiscard]]. This requires
splitting up functions like next() that are sometimes just used for
side effects.

llvm-svn: 284363

llvm-svn: 277255

llvm-svn: 274109

No functionality change intended.

llvm-svn: 271686

llvm-svn: 269703

Previously, we have re-implemented utility functions such as `expect`
or `next` in LinkerScript.cpp. This patch reuses the existing
implementation that is in ScriptParser.cpp.

llvm-svn: 267255

ScriptParserBase class is a container of collection of various methods
to parse linker script-ish text. It had a virtual method `run` to run
the parser. But we don't have to enforce its descendents to implement
that. It's up to them.

This patch removes pure virtual function `run`.

llvm-svn: 267246

llvm-svn: 265603

This patch add a base script tokenizer class to decouple parsing from
linker script handling.  The idea is to use this base class on dynamic
list parsing (--dynamic-list option). No functionality added.

llvm-svn: 265600