• Matthew Dempsky's avatar
    cmd/internal/gc, cmd/yacc: restore remaining custom error messages · 4f2a7301
    Matthew Dempsky authored
    This CL extends cmd/yacc to expose a yyErrorVerbose variable that
    changes the error messages from just "syntax error" to "syntax error:
    unexpected ${tokname}".
    
    It also moves the yyToknames table generation to after rules have been
    processed so that entries can be generated for tokens that aren't
    mentioned in the preamble (e.g., '.' in the case of go.y).
    
    Lastly, it restores gc's old code for applying yytfix to yyToknames,
    except that substituting "LLITERAL" with litbuf happens in Yyerror.
    
    Fixes #9968.
    
    Change-Id: Icec188d11fdabc1dae31b8a471c35b5c7f6deec7
    Reviewed-on: https://go-review.googlesource.com/8432Reviewed-by: 's avatarRuss Cox <rsc@golang.org>
    Run-TryBot: Matthew Dempsky <mdempsky@google.com>
    TryBot-Result: Gobot Gobot <gobot@golang.org>
    4f2a7301
bug435.go 399 Bytes