Simon Tatham 951525e0a5 [TableGen] Introduce an if/then/else statement. ... Summary: This allows you to make some of the defs in a multiclass or `foreach` conditional on an expression computed from the parameters or iteration variables. It was already possible to simulate an if statement using a `foreach` with a dummy iteration variable and a list constructed using `!if` so that it had length 0 or 1 depending on the condition, e.g. foreach unusedIterationVar = !if(condition, [1], []<int>) in { ... } But this syntax is nicer to read, and also more convenient because it allows an else clause. To avoid upheaval in the implementation, I've implemented `if` as pure syntactic sugar on the `foreach` implementation: internally, `ParseIf` actually does construct exactly the kind of foreach shown above (and another reversed one for the else clause if present). Reviewers: nhaehnle, hfinkel Reviewed By: hfinkel Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D71474		2020-01-14 10:19:53 +00:00
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CMakeLists.txt
Error.cpp
JSONBackend.cpp
LLVMBuild.txt
Main.cpp
Record.cpp	[TableGen] Add bang-operators !getop and !setop.	2019-12-11 12:05:22 +00:00
SetTheory.cpp
StringMatcher.cpp
TableGenBackend.cpp
TGLexer.cpp	[TableGen] Introduce an if/then/else statement.	2020-01-14 10:19:53 +00:00
TGLexer.h	[TableGen] Introduce an if/then/else statement.	2020-01-14 10:19:53 +00:00
TGParser.cpp	[TableGen] Introduce an if/then/else statement.	2020-01-14 10:19:53 +00:00
TGParser.h	[TableGen] Introduce an if/then/else statement.	2020-01-14 10:19:53 +00:00