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Improve parsing of invalid expressions. (#2726)

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This addresses crashes for infix operator expressions, but the approach should more generally yield balanced parsed trees.
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Jon Ross-Perkins
2023-03-31 20:51:59 -07:00
committed by GitHub
parent 7824e9618c
commit a905cdea30
8 changed files with 74 additions and 13 deletions
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toolchain/parser/parse_node_kind.def
+3
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@@ -43,6 +43,9 @@
// The end of the file.
CARBON_PARSE_NODE_KIND_CHILD_COUNT(FileEnd, 0)
// An invalid expression. Used to balance the parse tree. Always has an error.
CARBON_PARSE_NODE_KIND_CHILD_COUNT(InvalidExpression, 0)
// An empty declaration, such as `;`.
CARBON_PARSE_NODE_KIND_CHILD_COUNT(EmptyDeclaration, 0)