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Diffstat (limited to 'scalatexApi/src/main/scala/scalaparser/ScalaSyntax.scala')
| -rw-r--r-- | scalatexApi/src/main/scala/scalaparser/ScalaSyntax.scala | 412 |
1 files changed, 0 insertions, 412 deletions
diff --git a/scalatexApi/src/main/scala/scalaparser/ScalaSyntax.scala b/scalatexApi/src/main/scala/scalaparser/ScalaSyntax.scala deleted file mode 100644 index 83e0b90..0000000 --- a/scalatexApi/src/main/scala/scalaparser/ScalaSyntax.scala +++ /dev/null @@ -1,412 +0,0 @@ -package scalaparser -import acyclic.file -import language.implicitConversions -import syntax._ -import org.parboiled2._ - -/** - * Parser for Scala syntax. - * - * The `G` parameter that gets passed in to each rule stands for - * "Greedy", and determines whether or not that rule is to consume - * newlines after the last terminal in that rule. We need to pass it - * everywhere so it can go all the way to the last terminal deep - * inside the parse tree, which can then decide whether or not to - * consume whitespace. - * - * The vast majority of terminals will consume newlines; only rules - * which occur in {} blocks won't have their terminals consume newlines, - * and only the *last* terminal in the rule will be affected. - * That's why the parser does terminals-consume-newlines-by-default, - * and leaves it up to the dev to thread the `G` variable where-ever - * we want the opposite behavior. - */ -class ScalaSyntax(val input: ParserInput) extends Parser with Basic with Identifiers with Literals { - // Aliases for common things. These things are used in almost every parser - // in the file, so it makes sense to keep them short. - type B = Boolean - val t = true - type R0 = Rule0 - /** - * Parses all whitespace, excluding newlines. This is only - * really useful in e.g. {} blocks, where we want to avoid - * capturing newlines so semicolon-inference would work - */ - def WS = rule { zeroOrMore(Basic.WhitespaceChar | Literals.Comment) } - - /** - * Parses whitespace, including newlines. - * This is the default for most things - */ - def WL = rule{ zeroOrMore(Basic.WhitespaceChar | Literals.Comment | Basic.Newline) } - - - /** - * Whitespace which captures or doesn't-capture - * newlines depending on the G that gets passed in - */ - def W(G: B = t) = - if (G) WL - else WS - - /** - * By default, all strings and characters greedily - * capture all whitespace immediately after the token. - */ - implicit private[this] def wspStr(s: String): R0 = rule { str(s) ~ WL } - implicit private[this] def wspChar(s: Char): R0 = rule { ch(s) ~ WL } - - /** - * Most keywords don't just require the correct characters to match, - * they have to ensure that subsequent characters *don't* match in - * order for it to be a keyword. This enforces that rule for key-words - * (W) and key-operators (O) which have different non-match criteria. - */ - object K { - def W(s: String) = rule { - Key.W(s) ~ WL - } - - def O(s: String) = rule { - Key.O(s) ~ WL - } - } - - /** - * Occasionally, you want to decide whether or not to - * capture newlines based on the context, so use this - * and pass in G manually. - */ - def StrW(s: String, G: B): R0 = rule { str(s) ~ W(G) } - - def pos = cursor -> cursorChar - - /** - * helper printing function - */ - def pr(s: String) = rule { run(println(s"LOGGING $cursor: $s")) } - - def Id(G: B = t) = rule { Identifiers.Id ~ W(G) } - def VarId(G: B = t) = rule { Identifiers.VarId ~ W(G) } - def Literal(G: B = t) = rule { Literals.Literal ~ W(G) } - def Semi = rule { Basic.Semi ~ WL } - def Newline = rule { Basic.Newline ~ WL } - - def QualId(G: B = t) = rule { oneOrMore(Id(false)) separatedBy '.' ~ W(G) } - def Ids = rule { oneOrMore(Id()) separatedBy ',' } - - def Path(G: B = t): R0 = rule { - zeroOrMore(Id(G) ~ '.') ~ K.W("this") ~ zeroOrMore(Id(G)).separatedBy('.') | - StableId(G) - } - def StableId(G: B = t): R0 = rule { - zeroOrMore(Id() ~ '.') ~ (K.W("this") | K.W("super") ~ optional(ClassQualifier)) ~ '.' ~ oneOrMore(Id(G)).separatedBy('.') | - Id(false) ~ zeroOrMore(WL ~ '.' ~ WL ~ Id(false)) ~ W(G) - } - - def ClassQualifier = rule { '[' ~ Id() ~ ']' } - - def Type(G: B = t): R0 = rule { - FunctionArgTypes ~ K.O("=>") ~ Type(G) | InfixType(false) ~ optional(WL ~ ExistentialClause) ~ W(G) - } - def FunctionArgTypes = rule { - InfixType() | '(' ~ optional(oneOrMore(ParamType) separatedBy ',') ~ ')' - } - - def ExistentialClause = rule { "forSome" ~ '{' ~ oneOrMore(ExistentialDcl(false)).separatedBy(Semi) } - def ExistentialDcl(G: B = t) = rule { K.W("type") ~ TypeDcl(G) | K.W("val") ~ ValDcl(G) } - - def InfixType(G: B = t) = rule { - CompoundType(false) ~ zeroOrMore(WL ~ Id() ~ optional(Newline) ~ CompoundType(false)) ~ W(G) - } - def CompoundType(G: B = t) = rule { - oneOrMore(AnnotType(false)).separatedBy(WL ~ K.W("with")) ~ optional(Refinement(false)) ~ W(G) - } - def AnnotType(G: B = t) = rule { - SimpleType(false) ~ zeroOrMore(WL ~ Annotation(false)) ~ W(G) - } - def SimpleType(G: B = t): R0 = rule { - BasicType(false) ~ - optional(WL ~ '#' ~ Id(false)) ~ - optional(WL ~ TypeArgs(false)) ~ - W(G) - } - def BasicType(G: B = t): R0 = rule { - '(' ~ Types ~ ')' | - Path() ~ '.' ~ K.W("type") | - StableId(G) - } - def TypeArgs(G: B = t) = rule { '[' ~ Types ~ StrW("]", G) } - def Types = rule { oneOrMore(Type()).separatedBy(',') } - def Refinement(G: B = t) = rule { - optional(Newline) ~ '{' ~ oneOrMore(RefineStat).separatedBy(Semi) ~ StrW("}", G) - } - def RefineStat = rule { "type" ~ TypeDef(false) | Dcl(false) | MATCH } - def TypePat = rule { CompoundType() } - def Ascription(G: B = t) = rule { - ":" ~ ("_" ~ StrW("*", G) | InfixType(G) | oneOrMore(Annotation(G))) - } - - def ParamType = rule { K.O("=>") ~ Type() | Type() ~ "*" | Type() } - - def Expr(G: B = t): R0 = rule { (Bindings | optional(K.W("implicit")) ~ Id() | "_") ~ K.O("=>") ~ Expr(G) | Expr1(G) } - def Expr1(G: B = t): R0 = rule { - IfCFlow(G) | - WhileCFlow(G) | - TryCFlow(G) | - DoWhileCFlow(G) | - ForCFlow(G) | - K.W("throw") ~ Expr(G) | - K.W("return") ~ optional(Expr(G)) | - SimpleExpr() ~ K.O("=") ~ Expr(G) | - PostfixExpr(false) ~ optional("match" ~ '{' ~ CaseClauses ~ StrW("}", false) | Ascription(false)) ~ W(G) - } - def IfCFlow(G: B = t) = rule { "if" ~ '(' ~ Expr() ~ ')' ~ zeroOrMore(Newline) ~ Expr(G) ~ optional(optional(Semi) ~ K.W("else") ~ Expr(G)) } - def WhileCFlow(G: B = t) = rule { "while" ~ '(' ~ Expr() ~ ')' ~ zeroOrMore(Newline) ~ Expr(G) } - def TryCFlow(G: B = t) = rule { - K.W("try") ~ Expr(false) ~ - optional(WL ~ K.W("catch") ~ Expr(false)) ~ - optional(WL ~ K.W("finally") ~ Expr(false)) ~ - W(G) - } - - def DoWhileCFlow(G: B = t) = rule { K.W("do") ~ Expr() ~ optional(Semi) ~ "while" ~ '(' ~ Expr() ~ StrW(")", G) } - def ForCFlow(G: B = t) = rule { - "for" ~ - ('(' ~ Enumerators ~ ')' | '{' ~ Enumerators ~ '}') ~ - zeroOrMore(Newline) ~ - optional(K.W("yield")) ~ - Expr(G) } - def PostfixExpr(G: B = t): R0 = rule { InfixExpr(G) ~ optional(Id() ~ optional(Newline)) } - def InfixExpr(G: B = t): R0 = rule { PrefixExpr(G) ~ zeroOrMore(Id() ~ optional(Newline) ~ PrefixExpr(G)) } - def PrefixExpr(G: B = t) = rule { optional(anyOf("-+~!")) ~ SimpleExpr(G) } - - def SimpleExpr(G: B = t): R0 = rule { - SimpleExpr1(false) ~ - zeroOrMore(WL ~ ('.' ~ Id(false) | TypeArgs(false) | ArgumentExprs(false))) ~ - optional(WL ~ StrW("_", false)) ~ - W(G) - } - - def SimpleExpr1(G: B = t) = rule{ - K.W("new") ~ (ClassTemplate(G) | TemplateBody(G)) | - BlockExpr(G) | - Literal(G) ~ drop[String] | - Path(G) | - K.W("_") | - '(' ~ optional(Exprs) ~ StrW(")", G) - } - - - - def Exprs: R0 = rule { oneOrMore(Expr()).separatedBy(',') } - def ArgumentExprs(G: B = t): R0 = rule { - '(' ~ optional(Exprs ~ optional(K.O(":") ~ K.W("_") ~ '*')) ~ StrW(")", G) | - optional(Newline) ~ BlockExpr(G) - } - - def BlockExpr(G: B = t): R0 = rule { '{' ~ (CaseClauses | Block) ~ StrW("}", G) } - def Block: R0 = rule { - zeroOrMore(BlockStat ~ Semi) ~ optional(ResultExpr()) - } - - def BlockStat: R0 = rule { - Semi | - Import(false) | - zeroOrMore(Annotation(false)) ~ (optional(K.W("implicit") | K.W("lazy")) ~ Def(false) | zeroOrMore(LocalModifier) ~ TmplDef(false)) | - Expr1(false) - } - def ResultExpr(G: B = t): R0 = rule { (Bindings | optional(K.W("implicit")) ~ Id() | "_") ~ K.W("=>") ~ Block | Expr1(t) } - def Enumerators: R0 = rule { Generator(false) ~ zeroOrMore(Semi ~ Enumerator(false)) ~ WL } - def Enumerator(G: B = t): R0 = rule { Generator(G) | Guard(G) | Pattern1 ~ K.O("=") ~ Expr(G) } - def Generator(G: B = t): R0 = rule { Pattern1 ~ K.O("<-") ~ Expr(false) ~ optional(WL ~ Guard(false)) ~ W(G) } - def CaseClauses: R0 = rule { oneOrMore(CaseClause) } - def CaseClause: R0 = rule { K.W("case") ~ Pattern ~ optional(Guard(true)) ~ K.O("=>") ~ Block } - def Guard(G: B = t): R0 = rule { K.W("if") ~ PostfixExpr(G) } - def Pattern: R0 = rule { - oneOrMore(Pattern1).separatedBy('|') - } - def Pattern1: R0 = rule { - K.W("_") ~ K.O(":") ~ TypePat | VarId() ~ K.O(":") ~ TypePat | Pattern2 - } - def Pattern2: R0 = rule { - VarId() ~ "@" ~ Pattern3 | Pattern3 | VarId() - } - def Pattern3: R0 = rule { - SimplePattern ~ zeroOrMore(Id() ~ SimplePattern) - } - def SimplePattern: R0 = rule { - K.W("_") | - Literal() ~ drop[String] | - '(' ~ optional(Patterns) ~ ')' | - ( - StableId() ~ - optional( - '(' ~ - (optional(Patterns ~ ',') ~ optional(VarId() ~ '@') ~ K.W("_") ~ '*' | optional(Patterns)) ~ - ')' - ) - ) | - VarId() - } - def Patterns: R0 = rule { K.W("_") ~ '*' | oneOrMore(Pattern).separatedBy(',') } - - def TypeParamClause: R0 = rule { '[' ~ oneOrMore(VariantTypeParam).separatedBy(',') ~ ']' } - def FunTypeParamClause: R0 = rule { '[' ~ oneOrMore(TypeParam).separatedBy(',') ~ ']' } - def VariantTypeParam: R0 = rule { zeroOrMore(Annotation()) ~ optional(anyOf("+-")) ~ TypeParam } - def TypeParam: R0 = rule { - (Id() | K.W("_")) ~ - optional(TypeParamClause) ~ - optional(K.O(">:") ~ Type()) ~ - optional(K.O("<:") ~ Type()) ~ - zeroOrMore(K.O("<%") ~ Type()) ~ - zeroOrMore(K.O(":") ~ Type()) - } - def ParamClauses: R0 = rule { zeroOrMore(ParamClause) ~ optional(optional(Newline) ~ '(' ~ K.W("implicit") ~ Params ~ ')') } - def ParamClause: R0 = rule { optional(Newline) ~ '(' ~ optional(Params) ~ ')' } - def Params: R0 = rule { zeroOrMore(Param).separatedBy(',') } - def Param: R0 = rule { zeroOrMore(Annotation()) ~ Id() ~ optional(K.O(":") ~ ParamType) ~ optional(K.O("=") ~ Expr()) } - def ClassParamClauses(G: B = t): R0 = rule { zeroOrMore(ClassParamClause(G)) ~ optional(optional(Newline) ~ '(' ~ K.W("implicit") ~ ClassParam ~ StrW(")", G)) } - def ClassParamClause(G: B = t): R0 = rule { optional(Newline) ~ '(' ~ optional(ClassParams) ~ StrW(")", G) } - def ClassParams: R0 = rule { oneOrMore(ClassParam).separatedBy(',') } - def ClassParam: R0 = rule { zeroOrMore(Annotation()) ~ optional(zeroOrMore(Modifier) ~ (K.W("val") | K.W("var"))) ~ Id() ~ K.O(":") ~ ParamType ~ optional(K.O("=") ~ Expr()) } - - def Bindings: R0 = rule { '(' ~ oneOrMore(Binding).separatedBy(',') ~ ')' } - def Binding: R0 = rule { (Id() | K.W("_")) ~ optional(K.O(":") ~ Type()) } - - def Modifier: R0 = rule { LocalModifier | AccessModifier | K.W("override") } - def LocalModifier: R0 = rule { K.W("abstract") | K.W("final") | K.W("sealed") | K.W("implicit") | K.W("lazy") } - def AccessModifier: R0 = rule { (K.W("private") | K.W("protected")) ~ optional(AccessQualifier) } - def AccessQualifier: R0 = rule { '[' ~ (K.W("this") | Id()) ~ ']' } - - def Annotation(G: B = t): R0 = rule { '@' ~ SimpleType(false) ~ zeroOrMore(WL ~ ArgumentExprs(false)) ~ W(G) } - def ConstrAnnotation: R0 = rule { '@' ~ SimpleType() ~ ArgumentExprs() } - - def TemplateBody(G: B = t): R0 = rule { - WL ~ - '{' ~ - optional(SelfType) ~ - TemplateStat ~ - zeroOrMore(Semi ~ TemplateStat) ~ - WL ~ - StrW("}", G) - } - def TemplateStat: R0 = rule { - Import(false) | - zeroOrMore(Annotation() ~ optional(Newline)) ~ zeroOrMore(Modifier) ~ (Def(false) | Dcl(false)) | - Expr(false) | - MATCH - } - - def SelfType: R0 = rule { K.W("this") ~ K.O(":") ~ Type() ~ K.O("=>") | Id() ~ optional(K.O(":") ~ Type()) ~ K.O("=>") } - - def Import(G: B = t): R0 = rule { K.W("import") ~ oneOrMore(ImportExpr(G)).separatedBy(',') } - - def ImportExpr(G: B = t): R0 = rule { StableId(G) ~ optional('.' ~ (StrW("_", G) | ImportSelectors(G))) } - def ImportSelectors(G: B = t): R0 = rule { '{' ~ zeroOrMore(ImportSelector ~ ',') ~ (ImportSelector | K.W("_")) ~ StrW("}", G) } - def ImportSelector: R0 = rule { Id() ~ optional(K.O("=>") ~ (Id() | K.W("_"))) } - - def Dcl(G: B = t): R0 = rule { - K.W("val") ~ ValDcl(G) | - K.W("var") ~ VarDcl(G) | - K.W("def") ~ FunDcl(G) | - K.W("type") ~ zeroOrMore(Newline) ~ TypeDcl(G) - } - def ValDcl(G: B = t): R0 = rule { Ids ~ K.O(":") ~ Type(G) } - def VarDcl(G: B = t): R0 = rule { Ids ~ K.O(":") ~ Type(G) } - def FunDcl(G: B = t): R0 = rule { FunSig(false) ~ optional(WL ~ K.O(":") ~ Type(G)) } - def FunSig(G: B = t): R0 = rule { Id() ~ optional(FunTypeParamClause) ~ ParamClauses } - def TypeDcl(G: B = t): R0 = rule { - Id(false) ~ - optional(WL ~ TypeParamClause) ~ - optional(WL ~ K.O(">:") ~ Type(false)) ~ - optional(WL ~ K.O("<:") ~ Type(false)) ~ - W(G) - } - - def PatVarDef(G: B = t): R0 = rule { K.W("val") ~ PatDef(G) | K.W("var") ~ VarDef(G) } - def Def(G: B = t): R0 = rule { K.W("def") ~ FunDef(G) | K.W("type") ~ zeroOrMore(Newline) ~ TypeDef(G) | PatVarDef(G) | TmplDef(G) } - def PatDef(G: B = t): R0 = rule { oneOrMore(Pattern2).separatedBy(',') ~ optional(K.O(":") ~ Type()) ~ K.O("=") ~ Expr(G) } - def VarDef(G: B = t): R0 = rule { Ids ~ K.O(":") ~ Type() ~ K.O("=") ~ K.W("_") | PatDef(G) } - def FunDef(G: B = t): R0 = rule { - K.W("this") ~ ParamClause ~ ParamClauses ~ (K.O("=") ~ ConstrExpr | optional(Newline) ~ ConstrBlock) | - FunSig() ~ - ( - optional(K.O(":") ~ Type()) ~ K.O("=") ~ optional(K.W("macro")) ~ Expr(G) | - optional(Newline) ~ '{' ~ Block ~ StrW("}", G) - ) - } - def TypeDef(G: B = t): R0 = rule { Id() ~ optional(TypeParamClause) ~ K.O("=") ~ Type(G) } - - def TmplDef(G: B = t): R0 = rule { - K.W("trait") ~ TraitDef(G) | - optional(K.W("case")) ~ (K.W("class") ~ ClassDef(G) | - K.W("object") ~ ObjectDef(G)) - } - def ClassDef(G: B = t): R0 = rule { - Id() ~ - optional(TypeParamClause) ~ - zeroOrMore(ConstrAnnotation) ~ - optional(AccessModifier) ~ - ClassParamClauses(false) ~ - ClassTemplateOpt(false) ~ - W(G) - - } - def TraitDef(G: B = t): R0 = rule { Id() ~ optional(TypeParamClause) ~ TraitTemplateOpt(G) } - def ObjectDef(G: B = t): R0 = rule { Id() ~ ClassTemplateOpt(G) } - def ClassTemplateOpt(G: B = t): R0 = rule { - WL ~ K.W("extends") ~ ClassTemplate(G) | - optional(WL ~ optional(K.W("extends")) ~ TemplateBody(G)) - } - def TraitTemplateOpt(G: B = t): R0 = rule { K.W("extends") ~ TraitTemplate(G) | optional(optional(K.W("extends")) ~ TemplateBody(G)) } - def ClassTemplate(G: B = t): R0 = rule { - optional(EarlyDefs) ~ - ClassParents(false) ~ - optional(WL ~ TemplateBody(false)) ~ - W(G) - } - - def TraitTemplate(G: B = t): R0 = rule { - optional(EarlyDefs) ~ TraitParents(false) ~ optional(TemplateBody(false)) ~ W(G) - } - def ClassParents(G: B = t): R0 = rule { - Constr(false) ~ zeroOrMore(WL ~ K.W("with") ~ AnnotType(G)) ~ W(G) - } - def TraitParents(G: B = t): R0 = rule { - AnnotType(false) ~ zeroOrMore(WL ~ K.W("with") ~ AnnotType(false)) ~ W(G) - } - def Constr(G: B = t): R0 = rule { - AnnotType(false) ~ zeroOrMore(WL ~ ArgumentExprs(false)) ~ - W(G) - } - def EarlyDefs: R0 = rule { - '{' ~ optional(oneOrMore(EarlyDef).separatedBy(Semi)) ~ '}' ~ K.W("with") - } - def EarlyDef: R0 = rule { - zeroOrMore(Annotation() ~ optional(Newline)) ~ zeroOrMore(Modifier) ~ PatVarDef(false) - } - def ConstrExpr: R0 = rule { ConstrBlock | SelfInvocation } - def ConstrBlock: R0 = rule { '{' ~ SelfInvocation ~ zeroOrMore(Semi ~ BlockStat) ~ '}' } - def SelfInvocation: R0 = rule { K.W("this") ~ oneOrMore(ArgumentExprs()) } - - def TopStatSeq: R0 = rule { zeroOrMore(TopStat).separatedBy(Semi) } - def TopStat: R0 = rule { - Packaging | - PackageObject(false) | - Import(false) | - zeroOrMore(Annotation(false) ~ optional(Newline)) ~ zeroOrMore(Modifier) ~ TmplDef(false) | - MATCH - } - def Packaging: R0 = rule { K.W("package") ~ QualId() ~ '{' ~ TopStatSeq ~ '}' } - def PackageObject(G: B = t): R0 = rule { K.W("package") ~ K.W("object") ~ ObjectDef(G) } - def CompilationUnit: Rule1[String] = rule { - capture( - WL ~ - zeroOrMore(Semi) ~ - zeroOrMore(K.W("package") ~ QualId(false)).separatedBy(Semi) ~ - TopStatSeq ~ - EOI - ) - } -} |