MC/Lexer: Add 'Real' token type for floating point literals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114718 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCParser/AsmLexer.cpp b/lib/MC/MCParser/AsmLexer.cpp
index 086df08..59da381 100644
--- a/lib/MC/MCParser/AsmLexer.cpp
+++ b/lib/MC/MCParser/AsmLexer.cpp
@@ -65,9 +65,21 @@
}
/// LexIdentifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
+static bool IsIdentifierChar(char c) {
+ return isalnum(c) || c == '_' || c == '$' || c == '.' || c == '@';
+}
AsmToken AsmLexer::LexIdentifier() {
- while (isalnum(*CurPtr) || *CurPtr == '_' || *CurPtr == '$' ||
- *CurPtr == '.' || *CurPtr == '@')
+ // Check for floating point literals.
+ if (CurPtr[-1] == '.' && isdigit(*CurPtr)) {
+ while (isdigit(*CurPtr))
+ ++CurPtr;
+ if (!IsIdentifierChar(*CurPtr)) {
+ return AsmToken(AsmToken::Real,
+ StringRef(TokStart, CurPtr - TokStart));
+ }
+ }
+
+ while (IsIdentifierChar(*CurPtr))
++CurPtr;
// Handle . as a special case.
@@ -124,7 +136,6 @@
CurPtr += 3;
}
-
/// LexDigit: First character is [0-9].
/// Local Label: [0-9][:]
/// Forward/Backward Label: [0-9][fb]
@@ -132,13 +143,21 @@
/// Octal integer: 0[0-7]+
/// Hex integer: 0x[0-9a-fA-F]+
/// Decimal integer: [1-9][0-9]*
-/// TODO: FP literal.
AsmToken AsmLexer::LexDigit() {
// Decimal integer: [1-9][0-9]*
if (CurPtr[-1] != '0') {
while (isdigit(*CurPtr))
++CurPtr;
-
+
+ // Check for floating point literals.
+ if (*CurPtr == '.') {
+ ++CurPtr;
+ while (isdigit(*CurPtr))
+ ++CurPtr;
+
+ return AsmToken(AsmToken::Real, StringRef(TokStart, CurPtr - TokStart));
+ }
+
StringRef Result(TokStart, CurPtr - TokStart);
long long Value;