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forked from GitHub/gf-core

the Error type; better lexer error reporting

This commit is contained in:
aarne
2006-09-01 15:11:22 +00:00
parent 66d3c75031
commit fda42f61c4
9 changed files with 132 additions and 48 deletions

View File

@@ -11,9 +11,11 @@ resource Predef = {
param PBool = PTrue | PFalse ;
oper Int : Type = variants {} ; -- the type of integers
oper Ints : Int -> Type = variants {} ; -- the type of integers from 0 to n
oper Error : Type = variants {} ; -- the empty type
oper Int : Type = variants {} ; -- the type of integers
oper Ints : Int -> Type = variants {} ; -- the type of integers from 0 to n
oper error : Str -> Error = variants {} ; -- forms error message
oper length : Tok -> Int = variants {} ; -- length of string
oper drop : Int -> Tok -> Tok = variants {} ; -- drop prefix of length
oper take : Int -> Tok -> Tok = variants {} ; -- take prefix of length

View File

@@ -418,8 +418,13 @@ oper
in mkV cry cries cried cried crying ;
regDuplV fit =
let fitt = fit + last fit in
mkV fit (fit + "s") (fitt + "ed") (fitt + "ed") (fitt + "ing") ;
case last fit of {
("a" | "e" | "i" | "o" | "u" | "y") =>
Predef.error (["final duplication makes no sense for"] ++ fit) ;
t =>
let fitt = fit + t in
mkV fit (fit + "s") (fitt + "ed") (fitt + "ed") (fitt + "ing")
} ;
irregV x y z = let reg = (regV x).s in
mkV x (reg ! VPres) y z (reg ! VPresPart) ** {s1 = [] ; lock_V = <>} ;