Implement Paste
Add a paste operator '#' to take two identifier-like strings and joint
them. Internally paste gets represented as a !strconcat() with any
necessary casts to string added.
This will be used to implement basic for loop functionality as in:
for i = [0, 1, 2, 3, 4, 5, 6, 7] {
def R#i : Register<...>
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142525 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/TableGen/TGLexer.cpp b/lib/TableGen/TGLexer.cpp
index 3262121..45d0b1e 100644
--- a/lib/TableGen/TGLexer.cpp
+++ b/lib/TableGen/TGLexer.cpp
@@ -91,10 +91,10 @@
switch (CurChar) {
default:
- // Handle letters: [a-zA-Z_#]
- if (isalpha(CurChar) || CurChar == '_' || CurChar == '#')
+ // Handle letters: [a-zA-Z_]
+ if (isalpha(CurChar) || CurChar == '_')
return LexIdentifier();
-
+
// Unknown character, emit an error.
return ReturnError(TokStart, "Unexpected character");
case EOF: return tgtok::Eof;
@@ -111,6 +111,7 @@
case ')': return tgtok::r_paren;
case '=': return tgtok::equal;
case '?': return tgtok::question;
+ case '#': return tgtok::paste;
case 0:
case ' ':
@@ -250,8 +251,7 @@
const char *IdentStart = TokStart;
// Match the rest of the identifier regex: [0-9a-zA-Z_#]*
- while (isalpha(*CurPtr) || isdigit(*CurPtr) || *CurPtr == '_' ||
- *CurPtr == '#')
+ while (isalpha(*CurPtr) || isdigit(*CurPtr) || *CurPtr == '_')
++CurPtr;
// Check to see if this identifier is a keyword.