fix: name is now solace
This commit is contained in:
parent
ad3d1268a0
commit
471889d5f1
3 changed files with 464 additions and 92 deletions
62
README.md
62
README.md
|
@ -1,4 +1,5 @@
|
|||
# STWL: Strongly Typed Web Language
|
||||
# Solace
|
||||
A language to find solace after using JavaScript
|
||||
|
||||
Proposal: A strongly typed, programming language that compiles to JavaScript, with the following features:
|
||||
* Error unions: `Error!string`
|
||||
|
@ -15,9 +16,6 @@ Syntax example (very early proposal, might change):
|
|||
import { func1, func2, func3 as funFunc } from './MyCoolModule'
|
||||
import Cool from './MyCoolModule'
|
||||
|
||||
// although I might add something like this in the future:
|
||||
import './MyCoolModule' as Cool // because it just reads so much nicer
|
||||
|
||||
// Declarations can be constant, variable or live (a.k.a. reactive):
|
||||
|
||||
// Constants can never change
|
||||
|
@ -65,4 +63,60 @@ Syntax example (very early proposal, might change):
|
|||
}
|
||||
}
|
||||
|
||||
// Values can be optional
|
||||
var userName: ?string = None // we don't know the name, yet
|
||||
|
||||
// Errors can be involved as well
|
||||
var userName: !string = Error('user not found')
|
||||
if (userFound) {
|
||||
userName = 'Hans'
|
||||
}
|
||||
|
||||
/* Optional values and Error Unions explained:
|
||||
*
|
||||
* ?string would be string | null in Typescript,
|
||||
* !string would be string | Error,
|
||||
* !?string would be (string | null) | Error
|
||||
* Error unions can be specific: NetworkError!string
|
||||
* Optional values can either be a value or None (there is no null in Solace)
|
||||
*/
|
||||
|
||||
// undefined
|
||||
var userName: string // undefined, because it is not initialized
|
||||
userName = undefined // Error! You cannot set anything to undefined
|
||||
|
||||
// In Solace, a value can either be explicitely optional and set to None,
|
||||
// or it can be undefined, because there was no assignment, yet.
|
||||
// This makes the distinction between undefined and null very clear:
|
||||
if (userName is undefined) // not initialized at all
|
||||
if (userName is None) // explicitely set to None
|
||||
|
||||
// Guards: certain places can make use of guards to tighten their matches:
|
||||
match userName when Some(name) {
|
||||
name => console.log('User is named', name)
|
||||
} else {
|
||||
console.log('User has no name?!')
|
||||
}
|
||||
|
||||
// defer allows you to run a code block after a function finished
|
||||
async fn deleteUser(userId: string) {
|
||||
const user: ?User = await fetch(`/api/users/${userId}`)
|
||||
|
||||
// lets not forget to send the user a mail
|
||||
defer when user is Some(_) {
|
||||
sendEmail(userId, `Greetings ${user.name}, you have been deleted!`)
|
||||
}
|
||||
|
||||
await deleteUser(userId)
|
||||
}
|
||||
|
||||
|
||||
// functions look like this
|
||||
fn doMath(): ?number {
|
||||
if (!computer.ready) return None
|
||||
return 42
|
||||
}
|
||||
|
||||
//
|
||||
|
||||
```
|
||||
|
|
10
package.json
10
package.json
|
@ -1,7 +1,7 @@
|
|||
{
|
||||
"name": "ohm-grammar-stwl",
|
||||
"name": "ohm-grammar-solace",
|
||||
"version": "0.0.1",
|
||||
"description": "Strongly Typed Web Language",
|
||||
"description": "A language to find solace after using JavaScript",
|
||||
"license": "MIT",
|
||||
"keywords": [
|
||||
"ohm",
|
||||
|
@ -9,12 +9,12 @@
|
|||
"javascript",
|
||||
"typed",
|
||||
"peg",
|
||||
"stwl"
|
||||
"solace"
|
||||
],
|
||||
"author": "koehr <n@koehr.ing>",
|
||||
"homepage": "https://git.koehr.ing/n/ohm-grammar-stwl",
|
||||
"homepage": "https://git.koehr.ing/n/ohm-grammar-solace",
|
||||
"bugs": {
|
||||
"url": "https://git.koehr.ing/n/ohm-grammar-stwl/issues"
|
||||
"url": "https://git.koehr.ing/n/ohm-grammar-solace/issues"
|
||||
},
|
||||
"scripts": {
|
||||
"test": "echo \"Error: no test specified\" && exit 1"
|
||||
|
|
484
stwl.ohm
484
stwl.ohm
|
@ -1,85 +1,12 @@
|
|||
StronglyTypedWebLanguage {
|
||||
Program = Statement*
|
||||
|
||||
Statement = ConstDec
|
||||
| VarDec
|
||||
| LiveDec
|
||||
| ComputedDec
|
||||
| TrackStmt
|
||||
| ExprStmt
|
||||
| Block
|
||||
|
||||
ConstDec = "const" identifier "=" Expr
|
||||
VarDec = "var" identifier "=" Expr
|
||||
LiveDec = "live" identifier "=" Expr
|
||||
ComputedDec = "computed" identifier Block
|
||||
|
||||
TrackStmt = "track" ListOf<identifier, ","> LambdaParams? Block
|
||||
ExprStmt = Expr // necessary?
|
||||
|
||||
Block = "{" Statement* "}"
|
||||
LambdaParams = "|" ListOf<identifier, ","> "|"
|
||||
|
||||
ParExpr = "(" Expr ")"
|
||||
Expr = AssignExpr
|
||||
AssignExpr = CompareExpr ("=" CompareExpr)?
|
||||
|
||||
CompareExpr = AddExpr (CompareOp AddExpr)?
|
||||
CompareOp = "==" | "!=" | "<=" | ">=" | "<" | ">"
|
||||
|
||||
AddExpr = MulExpr (("+"|"-") MulExpr)*
|
||||
MulExpr = UnaryExpr (("*"|"/"|"%") UnaryExpr)*
|
||||
|
||||
UnaryExpr = "void" UnaryExpr -- voidExp
|
||||
| "++" UnaryExpr -- preIncrement
|
||||
| "--" UnaryExpr -- preDecrement
|
||||
| "+" UnaryExpr -- unaryPlus
|
||||
| "-" UnaryExpr -- unaryMinus
|
||||
| "~" UnaryExpr -- bnot
|
||||
| "!" UnaryExpr -- lnot
|
||||
| PostfixExpr
|
||||
| FunctionExpr
|
||||
|
||||
PostfixExpr = CallExpr "++" -- postIncrement
|
||||
| CallExpr "--" -- postDecrement
|
||||
| CallExpr
|
||||
|
||||
CallExpr = MemberExpr ("(" ListOf<Expr, ","> ")")?
|
||||
MemberExpr = Literal ("." identifier)*
|
||||
|
||||
FunctionExpr = "fn" identifier "(" ListOf<identifier, ",">* ")" Block
|
||||
|
||||
Literal = numberLiteral
|
||||
| stringLiteral
|
||||
| booleanLiteral
|
||||
| nullLiteral
|
||||
| identifier
|
||||
| ParExpr
|
||||
| Block
|
||||
|
||||
// 123 or 12.34
|
||||
numberLiteral = digit+ ("." digit+)?
|
||||
|
||||
stringLiteral = "\"" (~"\"" any)* "\""
|
||||
| "'" (~"'" any)* "'"
|
||||
| "`" (~"`" any)* "`"
|
||||
|
||||
identifier = ~reservedWord identifierStart (letter | digit | "$" | "_")*
|
||||
identifierStart = letter | "$" | "_"
|
||||
reservedWord = keyword | futureReservedWord | nullLiteral | booleanLiteral
|
||||
|
||||
nullLiteral = "null"
|
||||
booleanLiteral = "true" | "false"
|
||||
|
||||
keyword = "const" | "var" | "live" | "computed" | "track" | "when" | "while"
|
||||
| "if" | "else" | "for" | "unreachable" | "catch" | "async" | "await"
|
||||
| "interface" | "struct" | "private" | "public" | "defer" | "fn"
|
||||
| "break" | "void" | "return" | "import" | "export" | "switch"
|
||||
| "continue"
|
||||
|
||||
futureReservedWord = "new" | "class" | "enum" | "extends" | "super"
|
||||
| "implements" | "yield"
|
||||
STWL {
|
||||
Program = &(Directive*) SourceElement*
|
||||
/*
|
||||
STWL - Strongly Typed Web Language is just a working title
|
||||
|
||||
This grammar is based on the ES5 and ES6 grammars and extends/cuts it where
|
||||
necessary to clear STWL from many, in my opinion unnecessary, features
|
||||
while extending it with a clearer syntax
|
||||
*/
|
||||
|
||||
sourceCharacter = any
|
||||
|
||||
|
@ -94,8 +21,6 @@ StronglyTypedWebLanguage {
|
|||
| "\uFEFF" -- byteOrderMark
|
||||
| unicodeSpaceSeparator
|
||||
|
||||
unicodeSpaceSeparator = "\u2000".."\u200B" | "\u3000"
|
||||
|
||||
lineTerminator = "\n" | "\r" | "\u2028" | "\u2029"
|
||||
lineTerminatorSequence = "\n" | "\r" ~"\n" | "\u2028" | "\u2029" | "\r\n"
|
||||
|
||||
|
@ -103,4 +28,397 @@ StronglyTypedWebLanguage {
|
|||
|
||||
multiLineComment = "/*" (~"*/" sourceCharacter)* "*/"
|
||||
singleLineComment = "//" (~lineTerminator sourceCharacter)*
|
||||
|
||||
identifier (an identifier) = ~reservedWord identifierName
|
||||
identifierName = identifierStart identifierPart*
|
||||
|
||||
identifierStart = letter | "$" | "_"
|
||||
identifierPart = identifierStart | unicodeDigit
|
||||
letter += unicodeCategoryNl
|
||||
unicodeCategoryNl
|
||||
= "\u2160".."\u2182" | "\u3007" | "\u3021".."\u3029"
|
||||
unicodeDigit (a digit)
|
||||
= "\u0030".."\u0039" | "\u0660".."\u0669" | "\u06F0".."\u06F9" | "\u0966".."\u096F" | "\u09E6".."\u09EF" | "\u0A66".."\u0A6F" | "\u0AE6".."\u0AEF" | "\u0B66".."\u0B6F" | "\u0BE7".."\u0BEF" | "\u0C66".."\u0C6F" | "\u0CE6".."\u0CEF" | "\u0D66".."\u0D6F" | "\u0E50".."\u0E59" | "\u0ED0".."\u0ED9" | "\u0F20".."\u0F29" | "\uFF10".."\uFF19"
|
||||
|
||||
unicodeSpaceSeparator = "\u2000".."\u200B" | "\u3000"
|
||||
|
||||
reservedWord = keyword | futureReservedWord | nullLiteral | booleanLiteral
|
||||
|
||||
// Note: keywords that are the complete prefix of another keyword should
|
||||
// be prioritized (e.g. 'in' should come before 'instanceof')
|
||||
keyword = for | while | do | break | continue | match
|
||||
| if | else | const | var | live | computed
|
||||
| catch | fn | return | void | this
|
||||
| has | enum | interface | extends | implements | struct
|
||||
| export | import | defer
|
||||
|
||||
futureReservedWord = fallthrough
|
||||
|
||||
literal = nullLiteral | booleanLiteral | numericLiteral
|
||||
| stringLiteral | regularExpressionLiteral
|
||||
|
||||
// Optionals, which can be either Some<T> or None, are translated to T | null
|
||||
nullLiteral = "None" ~identifierPart
|
||||
booleanLiteral = ("true" | "false") ~identifierPart
|
||||
|
||||
// For semantics on how decimal literals are constructed, see section 7.8.3
|
||||
|
||||
// Note that the ordering of hexIntegerLiteral and decimalLiteral is reversed w.r.t. the spec
|
||||
// This is intentional: the order decimalLiteral | hexIntegerLiteral will parse
|
||||
// "0x..." as a decimal literal "0" followed by "x..."
|
||||
numericLiteral = octalIntegerLiteral | hexIntegerLiteral | decimalLiteral
|
||||
|
||||
decimalLiteral = decimalIntegerLiteral "." decimalDigit* exponentPart -- bothParts
|
||||
| "." decimalDigit+ exponentPart -- decimalsOnly
|
||||
| decimalIntegerLiteral exponentPart -- integerOnly
|
||||
|
||||
decimalIntegerLiteral = nonZeroDigit decimalDigit* -- nonZero
|
||||
| "0" -- zero
|
||||
decimalDigit = "0".."9"
|
||||
nonZeroDigit = "1".."9"
|
||||
|
||||
exponentPart = exponentIndicator signedInteger -- present
|
||||
| -- absent
|
||||
exponentIndicator = "e" | "E"
|
||||
signedInteger = "+" decimalDigit* -- positive
|
||||
| "-" decimalDigit* -- negative
|
||||
| decimalDigit+ -- noSign
|
||||
|
||||
hexIntegerLiteral = "0x" hexDigit+
|
||||
| "0X" hexDigit+
|
||||
|
||||
// hexDigit defined in Ohm's built-in rules (otherwise: hexDigit = "0".."9" | "a".."f" | "A".."F")
|
||||
|
||||
octalIntegerLiteral = "0" octalDigit+
|
||||
|
||||
octalDigit = "0".."7"
|
||||
zeroToThree = "0".."3"
|
||||
fourToSeven = "4".."7"
|
||||
|
||||
// For semantics on how string literals are constructed, see section 7.8.4
|
||||
stringLiteral = "\"" doubleStringCharacter* "\""
|
||||
| "'" singleStringCharacter* "'"
|
||||
doubleStringCharacter = ~("\"" | "\\" | lineTerminator) sourceCharacter -- nonEscaped
|
||||
| "\\" escapeSequence -- escaped
|
||||
| lineContinuation -- lineContinuation
|
||||
singleStringCharacter = ~("'" | "\\" | lineTerminator) sourceCharacter -- nonEscaped
|
||||
| "\\" escapeSequence -- escaped
|
||||
| lineContinuation -- lineContinuation
|
||||
lineContinuation = "\\" lineTerminatorSequence
|
||||
escapeSequence = unicodeEscapeSequence
|
||||
| hexEscapeSequence
|
||||
| octalEscapeSequence
|
||||
| characterEscapeSequence // Must come last.
|
||||
characterEscapeSequence = singleEscapeCharacter
|
||||
| nonEscapeCharacter
|
||||
singleEscapeCharacter = "'" | "\"" | "\\" | "b" | "f" | "n" | "r" | "t" | "v"
|
||||
nonEscapeCharacter = ~(escapeCharacter | lineTerminator) sourceCharacter
|
||||
escapeCharacter = singleEscapeCharacter | decimalDigit | "x" | "u"
|
||||
octalEscapeSequence = zeroToThree octalDigit octalDigit -- whole
|
||||
| fourToSeven octalDigit -- eightTimesfourToSeven
|
||||
| zeroToThree octalDigit ~decimalDigit -- eightTimesZeroToThree
|
||||
| octalDigit ~decimalDigit -- octal
|
||||
hexEscapeSequence = "x" hexDigit hexDigit
|
||||
unicodeEscapeSequence = "u" hexDigit hexDigit hexDigit hexDigit
|
||||
|
||||
// §7.8.5 Regular Expression Literals -- https://es5.github.io/#x7.8.5
|
||||
|
||||
regularExpressionLiteral = "/" regularExpressionBody "/" regularExpressionFlags
|
||||
regularExpressionBody = regularExpressionFirstChar regularExpressionChar*
|
||||
regularExpressionFirstChar = ~("*" | "\\" | "/" | "[") regularExpressionNonTerminator
|
||||
| regularExpressionBackslashSequence
|
||||
| regularExpressionClass
|
||||
regularExpressionChar = ~("\\" | "/" | "[") regularExpressionNonTerminator
|
||||
| regularExpressionBackslashSequence
|
||||
| regularExpressionClass
|
||||
regularExpressionBackslashSequence = "\\" regularExpressionNonTerminator
|
||||
regularExpressionNonTerminator = ~(lineTerminator) sourceCharacter
|
||||
regularExpressionClass = "[" regularExpressionClassChar* "]"
|
||||
regularExpressionClassChar = ~("]" | "\\") regularExpressionNonTerminator
|
||||
| regularExpressionBackslashSequence
|
||||
regularExpressionFlags = identifierPart*
|
||||
|
||||
// === Implementation-level rules (not part of the spec) ===
|
||||
|
||||
multiLineCommentNoNL = "/*" (~("*/" | lineTerminator) sourceCharacter)* "*/"
|
||||
|
||||
// does not accept lineTerminators, not even implicit ones in a multiLineComment (cf. section 7.4)
|
||||
spacesNoNL = (whitespace | singleLineComment | multiLineCommentNoNL)*
|
||||
|
||||
// A semicolon is "automatically inserted" if a newline or the end of the input stream is
|
||||
// reached, or the offending token is "}".
|
||||
// See https://es5.github.io/#x7.9 for more information.
|
||||
// NOTE: Applications of this rule *must* appear in a lexical context -- either in the body of a
|
||||
// lexical rule, or inside `#()`.
|
||||
sc = space* (";" | end)
|
||||
| spacesNoNL (lineTerminator | ~multiLineCommentNoNL multiLineComment | &"}")
|
||||
|
||||
// Convenience rules for parsing keyword tokens.
|
||||
for = "for" ~identifierPart
|
||||
while = "while" ~identifierPart
|
||||
do = "do" ~identifierPart // will we support do-while loops?
|
||||
break = "break" ~identifierPart
|
||||
continue = "continue" ~identifierPart
|
||||
if = "if" ~identifierPart
|
||||
else = "else" ~identifierPart
|
||||
const = "const" ~identifierPart
|
||||
var = "var" ~identifierPart
|
||||
live = "live" ~identifierPart
|
||||
track = "track" ~identifierPart
|
||||
computed = "computed" ~identifierPart
|
||||
catch = "catch" ~identifierPart
|
||||
fn = "fn" ~identifierPart
|
||||
return = "return" ~identifierPart
|
||||
void = "void" ~identifierPart
|
||||
this = "_" ~identifierPart
|
||||
in = "in" ~identifierPart -- value in ArrayLike
|
||||
has = "has" ~identifierPart -- struct has Property
|
||||
enum = "enum" ~identifierPart
|
||||
interface = "interface" ~identifierPart
|
||||
extends = "extends" ~identifierPart
|
||||
implements = "implements" ~identifierPart
|
||||
export = "export" ~identifierPart
|
||||
import = "import" ~identifierPart
|
||||
struct = "struct" ~identifierPart
|
||||
defer = "defer" ~identifierPart
|
||||
match = "match" ~identifierPart
|
||||
fallthrough = "fallthrough" ~identifierPart
|
||||
|
||||
// end of lexical rules
|
||||
|
||||
noIn = ~in
|
||||
withIn =
|
||||
|
||||
noHas = ~has
|
||||
withHas =
|
||||
|
||||
noInHas = ~(in | has)
|
||||
withInHas =
|
||||
|
||||
// §A.3 Expressions -- https://es5.github.io/#A.3
|
||||
|
||||
PrimaryExpression = this
|
||||
| identifier
|
||||
| literal
|
||||
// ( litToken.type === "regexp"
|
||||
// ? this.ast(_fromIdx, "RegExpExpr",{body: litToken.value.body
|
||||
// flags: litToken.value.flags}, [])
|
||||
// : this.ast(_fromIdx, "LiteralExpr",{type: litToken.type
|
||||
// value: litToken.value}, []) )
|
||||
| ArrayLiteral
|
||||
| ObjectLiteral
|
||||
| "(" Expression<withIn> ")" -- parenExpr
|
||||
|
||||
ArrayLiteral = "[" ListOf<AssignmentExpressionOrElision, ","> "]"
|
||||
AssignmentExpressionOrElision = AssignmentExpression<withIn>
|
||||
| -- elision
|
||||
|
||||
ObjectLiteral = "{" ListOf<PropertyAssignment, ","> "}" -- noTrailingComma
|
||||
| "{" NonemptyListOf<PropertyAssignment, ","> "," "}" -- trailingComma
|
||||
|
||||
PropertyAssignment = get PropertyName "(" ")" "{" FunctionBody "}" -- getter
|
||||
| set PropertyName "(" FormalParameter ")" "{" FunctionBody "}" -- setter
|
||||
| PropertyName ":" AssignmentExpression<withIn> -- simple
|
||||
|
||||
PropertyName = identifierName
|
||||
| stringLiteral
|
||||
| numericLiteral
|
||||
|
||||
MemberExpression = MemberExpression "[" Expression<withIn> "]" -- arrayRefExp
|
||||
| MemberExpression "." identifierName -- propRefExp
|
||||
| new MemberExpression Arguments -- newExp
|
||||
| FunctionExpression
|
||||
| PrimaryExpression
|
||||
|
||||
NewExpression = MemberExpression
|
||||
| new NewExpression -- newExp
|
||||
|
||||
CallExpression = CallExpression "[" Expression<withIn> "]" -- arrayRefExp
|
||||
| CallExpression "." identifierName -- propRefExp
|
||||
| CallExpression Arguments -- callExpExp
|
||||
| MemberExpression Arguments -- memberExpExp
|
||||
|
||||
Arguments = "(" ListOf<AssignmentExpression<withIn>, ","> ")"
|
||||
|
||||
LeftHandSideExpression = CallExpression
|
||||
| NewExpression
|
||||
|
||||
PostfixExpression = LeftHandSideExpression #(spacesNoNL "++") -- postIncrement
|
||||
| LeftHandSideExpression #(spacesNoNL "--") -- postDecrement
|
||||
| LeftHandSideExpression
|
||||
|
||||
UnaryExpression = void UnaryExpression -- voidExp
|
||||
| "++" UnaryExpression -- preIncrement
|
||||
| "--" UnaryExpression -- preDecrement
|
||||
| "+" UnaryExpression -- unaryPlus
|
||||
| "-" UnaryExpression -- unaryMinus
|
||||
| "~" UnaryExpression -- bnot
|
||||
| "!" UnaryExpression -- lnot
|
||||
| PostfixExpression
|
||||
|
||||
MultiplicativeExpression = MultiplicativeExpression "*" UnaryExpression -- mul
|
||||
| MultiplicativeExpression "/" UnaryExpression -- div
|
||||
| MultiplicativeExpression "%" UnaryExpression -- mod
|
||||
| UnaryExpression
|
||||
|
||||
AdditiveExpression = AdditiveExpression "+" MultiplicativeExpression -- add
|
||||
| AdditiveExpression "-" MultiplicativeExpression -- sub
|
||||
| MultiplicativeExpression
|
||||
|
||||
ShiftExpression = ShiftExpression "<<" AdditiveExpression -- lsl
|
||||
| ShiftExpression ">>>" AdditiveExpression -- lsr
|
||||
| ShiftExpression ">>" AdditiveExpression -- asr
|
||||
| AdditiveExpression
|
||||
|
||||
RelationalExpression<guardIn>
|
||||
= RelationalExpression<guardIn> "<" ShiftExpression -- lt
|
||||
| RelationalExpression<guardIn> ">" ShiftExpression -- gt
|
||||
| RelationalExpression<guardIn> "<=" ShiftExpression -- le
|
||||
| RelationalExpression<guardIn> ">=" ShiftExpression -- ge
|
||||
| RelationalExpression<guardIn> guardIn "in" ShiftExpression -- inExp
|
||||
| ShiftExpression
|
||||
|
||||
EqualityExpression<guardIn>
|
||||
= EqualityExpression<guardIn> "==" RelationalExpression<guardIn> -- equal
|
||||
| EqualityExpression<guardIn> "!=" RelationalExpression<guardIn> -- notEqual
|
||||
| EqualityExpression<guardIn> "===" RelationalExpression<guardIn> -- eq
|
||||
| EqualityExpression<guardIn> "!==" RelationalExpression<guardIn> -- notEq
|
||||
| RelationalExpression<guardIn>
|
||||
|
||||
BitwiseANDExpression<guardIn>
|
||||
= BitwiseANDExpression<guardIn> "&" EqualityExpression<guardIn> -- band
|
||||
| EqualityExpression<guardIn>
|
||||
|
||||
BitwiseXORExpression<guardIn>
|
||||
= BitwiseXORExpression<guardIn> "^" BitwiseANDExpression<guardIn> -- bxor
|
||||
| BitwiseANDExpression<guardIn>
|
||||
|
||||
BitwiseORExpression<guardIn>
|
||||
= BitwiseORExpression<guardIn> "|" BitwiseXORExpression<guardIn> -- bor
|
||||
| BitwiseXORExpression<guardIn>
|
||||
|
||||
LogicalANDExpression<guardIn>
|
||||
= LogicalANDExpression<guardIn> "&&" BitwiseORExpression<guardIn> -- land
|
||||
| BitwiseORExpression<guardIn>
|
||||
|
||||
LogicalORExpression<guardIn>
|
||||
= LogicalORExpression<guardIn> "||" LogicalANDExpression<guardIn> -- lor
|
||||
| LogicalANDExpression<guardIn>
|
||||
|
||||
ConditionalExpression<guardIn>
|
||||
= LogicalORExpression<guardIn> "?" AssignmentExpression<withIn> ":" AssignmentExpression<guardIn> -- conditional
|
||||
| LogicalORExpression<guardIn>
|
||||
|
||||
AssignmentExpression<guardIn>
|
||||
= LeftHandSideExpression assignmentOperator AssignmentExpression<guardIn> -- assignment
|
||||
| ConditionalExpression<guardIn>
|
||||
|
||||
Expression<guardIn> (an expression)
|
||||
= Expression<guardIn> "," AssignmentExpression<guardIn> -- commaExp
|
||||
| AssignmentExpression<guardIn>
|
||||
|
||||
assignmentOperator = "=" | ">>>=" | "<<=" | ">>="
|
||||
| "*=" | "/=" | "%=" | "+=" | "-=" | "&=" | "^=" | "|="
|
||||
|
||||
// Statements -- (extends https://es5.github.io/#A.4)
|
||||
|
||||
Statement
|
||||
= Block
|
||||
| VariableStatement
|
||||
| EmptyStatement
|
||||
| ExpressionStatement
|
||||
| IfStatement
|
||||
| IterationStatement
|
||||
| ContinueStatement
|
||||
| BreakStatement
|
||||
| ReturnStatement
|
||||
|
||||
Block = "{" StatementList "}"
|
||||
LambdaParameters = "|" ListOf<identifier, ","> "|"
|
||||
|
||||
StatementList = Statement*
|
||||
|
||||
ComputedStatement = computed identifier Block
|
||||
|
||||
TrackStatement = track ListOf<identifier, ","> LambdaParameters? Block
|
||||
|
||||
VariableStatement = VariableAssignment VariableDeclarationList<withIn> #sc
|
||||
|
||||
VariableAssignment = var | const | live
|
||||
|
||||
VariableDeclarationList<guardIn> = NonemptyListOf<VariableDeclaration<guardIn>, ",">
|
||||
|
||||
VariableDeclaration<guardIn> = identifier Initialiser<guardIn>?
|
||||
|
||||
Initialiser<guardIn> = "=" AssignmentExpression<guardIn>
|
||||
|
||||
EmptyStatement = ";" // note: this semicolon eats newlines
|
||||
|
||||
ExpressionStatement = ~("{" | function) Expression<withIn> #sc
|
||||
|
||||
IfStatement = if "(" Expression<withIn> ")" Statement (else Statement)?
|
||||
|
||||
IterationStatement = do Statement while "(" Expression<withIn> ")" #sc -- doWhile
|
||||
| while "(" Expression<withIn> ")" Statement -- whileDo
|
||||
| for "(" Expression<noIn>? ";"
|
||||
Expression<withIn>? ";"
|
||||
Expression<withIn>? ")" Statement -- for3
|
||||
| for "(" var VariableDeclarationList<noIn> ";"
|
||||
Expression<withIn>? ";"
|
||||
Expression<withIn>? ")" Statement -- for3var
|
||||
| for "(" LeftHandSideExpression in
|
||||
Expression<withIn> ")" Statement -- forIn
|
||||
| for "(" var VariableDeclaration<noIn> in
|
||||
Expression<withIn> ")" Statement -- forInVar
|
||||
|
||||
ContinueStatement = continue #((spacesNoNL identifier)? sc)
|
||||
|
||||
BreakStatement = break #((spacesNoNL identifier)? sc)
|
||||
|
||||
ReturnStatement = return (#(spacesNoNL ~space) Expression<withIn>)? #sc
|
||||
|
||||
Catch = catch "(" FormalParameter ")" Block
|
||||
|
||||
Defer = defer (when Expression<withIn>)? Block
|
||||
|
||||
// Pattern Matching
|
||||
|
||||
MatchExpr = match Expression<withIn> (if Pattern)? "{" MatchArm+ "}" (else Block)?
|
||||
MatchArm = Pattern "=>" (Expression<withIn> | Block)
|
||||
Pattern = identifier
|
||||
| literal
|
||||
| GuardPattern
|
||||
GuardPattern = Expression<withIn> // Just an expression! No special syntax needed
|
||||
|
||||
|
||||
// §A.5 Functions and Programs -- https://es5.github.io/#A.5
|
||||
|
||||
FunctionDeclaration
|
||||
= function identifier "(" FormalParameterList ")" "{" FunctionBody "}"
|
||||
|
||||
FunctionExpression
|
||||
= function identifier "(" FormalParameterList ")" "{" FunctionBody "}" -- named
|
||||
| function "(" FormalParameterList ")" "{" FunctionBody "}" -- anonymous
|
||||
|
||||
FormalParameterList = ListOf<FormalParameter, ",">
|
||||
|
||||
FormalParameter = identifier
|
||||
|
||||
/*
|
||||
Note: The Directive Prologue is the longest sequence of ExpressionStatement
|
||||
productions occurring as the initial SourceElement (see https://es5.github.io/#x14.1)
|
||||
*/
|
||||
FunctionBody = &(Directive*) SourceElement*
|
||||
|
||||
SourceElement = Declaration | Statement
|
||||
|
||||
// Broken out so es6 can override to include ConstDecl and LetDecl
|
||||
Declaration = FunctionDeclaration
|
||||
|
||||
Directive = stringLiteral #sc
|
||||
}
|
||||
|
||||
ES5Lax <: ES5 {
|
||||
futureReservedWord := futureReservedWordLax
|
||||
}
|
||||
|
||||
|
|
Loading…
Add table
Reference in a new issue