[PATCH] D143148: [clang-repl] Add basic multiline input support

[Sunho Kim via Phabricator via cfe-commits]

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Add basic multi-line input support to clang-repl by using newly available SourceFileGrower interface of Preprocessor.

Compared to cling, this change uses fully fledged clang preprocessor (not MetaLexer) so it supports very complicated macro expressions.

NOTE: this is the related to https://discourse.llvm.org/t/rfc-flexible-lexer-buffering-for-handling-incomplete-input-in-interactive-c-c/64180


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D143148

Files:
  clang/include/clang/Interpreter/Interpreter.h
  clang/lib/Interpreter/IncrementalParser.cpp
  clang/lib/Interpreter/IncrementalParser.h
  clang/lib/Interpreter/Interpreter.cpp
  clang/test/Interpreter/multiline-func-macro-brace-error.cpp
  clang/test/Interpreter/multiline-func-macro-brace.cpp
  clang/test/Interpreter/multiline-func.cpp
  clang/test/Interpreter/multiline-ifdef.cpp
  clang/tools/clang-repl/ClangRepl.cpp

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