Implement __builtin_LINE() et. al. to support source location capture.
Summary:
This patch implements the source location builtins `__builtin_LINE(), `__builtin_FUNCTION()`, `__builtin_FILE()` and `__builtin_COLUMN()`. These builtins are needed to implement [`std::experimental::source_location`](https://rawgit.com/cplusplus/fundamentals-ts/v2/main.html#reflection.src_loc.creation).
With the exception of `__builtin_COLUMN`, GCC also implements these builtins, and Clangs behavior is intended to match as closely as possible.
Reviewers: rsmith, joerg, aaron.ballman, bogner, majnemer, shafik, martong
Reviewed By: rsmith
Subscribers: rnkovacs, loskutov, riccibruno, mgorny, kunitoki, alexr, majnemer, hfinkel, cfe-commits
Differential Revision: https://reviews.llvm.org/D37035
llvm-svn: 360937
diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp
index b8f3288..af034f9 100644
--- a/clang/lib/Parse/ParseExpr.cpp
+++ b/clang/lib/Parse/ParseExpr.cpp
@@ -639,6 +639,10 @@
/// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')'
/// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ','
/// assign-expr ')'
+/// [GNU] '__builtin_FILE' '(' ')'
+/// [GNU] '__builtin_FUNCTION' '(' ')'
+/// [GNU] '__builtin_LINE' '(' ')'
+/// [CLANG] '__builtin_COLUMN' '(' ')'
/// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
/// [GNU] '__null'
/// [OBJC] '[' objc-message-expr ']'
@@ -1106,6 +1110,10 @@
case tok::kw___builtin_choose_expr:
case tok::kw___builtin_astype: // primary-expression: [OCL] as_type()
case tok::kw___builtin_convertvector:
+ case tok::kw___builtin_COLUMN:
+ case tok::kw___builtin_FILE:
+ case tok::kw___builtin_FUNCTION:
+ case tok::kw___builtin_LINE:
return ParseBuiltinPrimaryExpression();
case tok::kw___null:
return Actions.ActOnGNUNullExpr(ConsumeToken());
@@ -2067,6 +2075,10 @@
/// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ','
/// assign-expr ')'
/// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
+/// [GNU] '__builtin_FILE' '(' ')'
+/// [GNU] '__builtin_FUNCTION' '(' ')'
+/// [GNU] '__builtin_LINE' '(' ')'
+/// [CLANG] '__builtin_COLUMN' '(' ')'
/// [OCL] '__builtin_astype' '(' assignment-expression ',' type-name ')'
///
/// [GNU] offsetof-member-designator:
@@ -2286,6 +2298,33 @@
ConsumeParen());
break;
}
+ case tok::kw___builtin_COLUMN:
+ case tok::kw___builtin_FILE:
+ case tok::kw___builtin_FUNCTION:
+ case tok::kw___builtin_LINE: {
+ // Attempt to consume the r-paren.
+ if (Tok.isNot(tok::r_paren)) {
+ Diag(Tok, diag::err_expected) << tok::r_paren;
+ SkipUntil(tok::r_paren, StopAtSemi);
+ return ExprError();
+ }
+ SourceLocExpr::IdentKind Kind = [&] {
+ switch (T) {
+ case tok::kw___builtin_FILE:
+ return SourceLocExpr::File;
+ case tok::kw___builtin_FUNCTION:
+ return SourceLocExpr::Function;
+ case tok::kw___builtin_LINE:
+ return SourceLocExpr::Line;
+ case tok::kw___builtin_COLUMN:
+ return SourceLocExpr::Column;
+ default:
+ llvm_unreachable("invalid keyword");
+ }
+ }();
+ Res = Actions.ActOnSourceLocExpr(Kind, StartLoc, ConsumeParen());
+ break;
+ }
}
if (Res.isInvalid())