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lang: Error parser if SetType fails to avoid a panic

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Turns out we can actually cause the parser to error instead of needing
to panic. It definitely seems to work, and is better than the panic. The
only awkward thing is how this plumbing works in yacc world. If anyone
knows why this is wrong, please let me know. Reading the generated code
seems to imply that this is correct.
This commit is contained in:
James Shubin
2018-05-22 20:02:50 -04:00
parent a049af6262
commit 9cae339546
3 changed files with 29 additions and 1 deletions
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lang/lexparse.go
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@@ -31,6 +31,7 @@ const (
ErrLexerIntegerOverflow = interfaces.Error("integer: overflow")
ErrLexerFloatOverflow = interfaces.Error("float: overflow")
ErrParseError = interfaces.Error("parser")
ErrParseSetType = interfaces.Error("can't set return type in parser")
ErrParseAdditionalEquals = interfaces.Error(errstrParseAdditionalEquals)
ErrParseExpectingComma = interfaces.Error(errstrParseExpectingComma)
)