src/compiler/compiler.ts

@@ -54,6 +54,7 @@ export class Compiler {
   fnLabelCount = 0
   ifLabelCount = 0
   tryLabelCount = 0
+  loopLabelCount = 0
   bytecode: Bytecode
   pipeCounter = 0
 
@@ -388,6 +389,8 @@ export class Compiler {
         return instructions
       }
 
+      case terms.MultiLineBlock:
+      case terms.SingleLineBlock:
       case terms.ThenBlock:
       case terms.SingleLineThenBlock:
       case terms.TryBlock: {
@@ -629,6 +632,24 @@ export class Compiler {
         return instructions
       }
 
+      case terms.WhileExpr: {
+        const [_while, test, _colon, block] = getAllChildren(node)
+        const instructions: ProgramItem[] = []
+
+        this.loopLabelCount++
+        const startLoop = `.loop_${this.loopLabelCount}:`
+        const endLoop = `.end_loop_${this.loopLabelCount}:`
+
+        instructions.push([`${startLoop}:`])
+        instructions.push(...this.#compileNode(test!, input))
+        instructions.push(['JUMP_IF_FALSE', endLoop])
+        instructions.push(...this.#compileNode(block!, input))
+        instructions.push(['JUMP', startLoop])
+        instructions.push([`${endLoop}:`])
+
+        return instructions
+      }
+
       default:
         throw new CompilerError(
           `Compiler doesn't know how to handle a "${node.type.name}" node.`,

src/compiler/tests/while.test.ts

@@ -0,0 +1,37 @@
+import { describe } from 'bun:test'
+import { expect, test } from 'bun:test'
+
+describe('while', () => {
+  test('basic variable', () => {
+    expect(`
+      a = true
+      b = ''
+      while a: 
+        a = false
+        b = done
+      end
+      b`)
+      .toEvaluateTo('done')
+  })
+
+  test('basic expression', () => {
+    expect(`
+      a = 0
+      while a < 10: 
+        a += 1
+      end
+      a`)
+      .toEvaluateTo(10)
+  })
+
+  test('compound expression', () => {
+    expect(`
+      a = 1
+      b = 0
+      while a > 0 and b < 100:  
+        b += 1
+      end
+      b`)
+      .toEvaluateTo(100)
+  })
+})

src/parser/shrimp.grammar

@@ -50,6 +50,7 @@ item {
 
 consumeToTerminator {
   PipeExpr |
+  WhileExpr |
   ambiguousFunctionCall |
   TryExpr |
   Throw |
@@ -70,6 +71,26 @@ pipeOperand {
   FunctionCall | FunctionCallOrIdentifier
 }
 
+WhileExpr {
+  singleLineWhileExpr | multiLineWhileExpr
+}
+
+SingleLineBlock {
+  consumeToTerminator
+}
+
+MultiLineBlock {
+  block
+}
+
+singleLineWhileExpr {
+    @specialize[@name=keyword]<Identifier, "while"> (ConditionalOp | expression) colon SingleLineBlock @specialize[@name=keyword]<Identifier, "end">
+}
+
+multiLineWhileExpr {
+    @specialize[@name=keyword]<Identifier, "while"> (ConditionalOp | expression) colon newlineOrSemicolon MultiLineBlock @specialize[@name=keyword]<Identifier, "end">
+}
+
 FunctionCallOrIdentifier {
   DotGet | Identifier
 }

src/parser/shrimp.terms.ts

@@ -47,19 +47,22 @@ export const
   Null = 45,
   colon = 46,
   CatchExpr = 47,
-  keyword = 69,
+  keyword = 73,
   TryBlock = 49,
   FinallyExpr = 50,
   Underscore = 53,
   Array = 54,
   ConditionalOp = 55,
   PositionalArg = 56,
-  TryExpr = 58,
-  Throw = 60,
-  IfExpr = 62,
-  SingleLineThenBlock = 64,
-  ThenBlock = 65,
-  ElseIfExpr = 66,
-  ElseExpr = 68,
-  CompoundAssign = 70,
-  Assign = 71
+  WhileExpr = 58,
+  SingleLineBlock = 60,
+  MultiLineBlock = 61,
+  TryExpr = 62,
+  Throw = 64,
+  IfExpr = 66,
+  SingleLineThenBlock = 68,
+  ThenBlock = 69,
+  ElseIfExpr = 70,
+  ElseExpr = 72,
+  CompoundAssign = 74,
+  Assign = 75

src/parser/shrimp.ts

@@ -4,14 +4,14 @@ import {operatorTokenizer} from "./operatorTokenizer"
 import {tokenizer, specializeKeyword} from "./tokenizer"
 import {trackScope} from "./scopeTracker"
 import {highlighting} from "./highlight"
-const spec_Identifier = {__proto__:null,null:90, catch:96, finally:102, end:104, try:118, throw:122, if:126, elseif:134, else:138}
+const spec_Identifier = {__proto__:null,null:90, catch:96, finally:102, end:104, while:118, try:126, throw:130, if:134, elseif:142, else:146}
 export const parser = LRParser.deserialize({
   version: 14,
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-  stateData: "D[~O!wOS!xOS~OdPOegOfWOg_OhROmWOuWOvWO}WO!]bO!_dO!aeO!}^O#QQO#XTO#YUO#ZjO~OdnOfWOg_OhROmWOuWOvWOymO}WO!VoO!}^O#QQO#XTO#YUO!ZoX#ZoX#foX#`oX!QoX!ToX!UoX~OP#OXQ#OXR#OXS#OXT#OXU#OXW#OXX#OXY#OXZ#OX[#OX]#OX^#OX~P!aOruO#QxO#SsO#TtO~OdyOy{O!O{P~OdnOfWOg_OmWOuWOvWOymO}WO!}^O#QQO#XTO#YUO#Z!PO~O#_!SO~P%[OP#PXQ#PXR#PXS#PXT#PXU#PXW#PXX#PXY#PXZ#PX[#PX]#PX^#PX#Z#PX#f#PX!Q#PX!T#PX!U#PX~OdnOfWOg_OhROmWOuWOvWOymO}WO!VoO!}^O#QQO#XTO#YUO#`#PX~P&^OV!UO~P&^OP#OXQ#OXR#OXS#OXT#OXU#OXW#OXX#OXY#OXZ#OX[#OX]#OX^#OX~O#Z!zX#f!zX!Q!zX!T!zX!U!zX~P(rOP!WOQ!WOR!XOS!XOT!ZOU![OW!YOX!YOY!YOZ!YO[!YO]!YO^!VO~O#Z!zX#f!zX!Q!zX!T!zX!U!zX~OP!WOQ!WOR!XOS!XO~P*{OT!ZOU![O~P*{OdPOfWOg_OhROmWOuWOvWO}WO!}^O#QQO#XTO#YUO~O!|!bO~O!Z!cO~P*{O!O!eO~OdnOfWOg_OmWOuWOvWO}WO!}^O#QQO#XTO#YUO~OV!UO_!kO`!kOa!kOb!kOc!kO~O#Z!lO#f!lO~OhRO!V!nO~P-ROhROymO!VoO!Zka#Zka#fka#`ka!Qka!Tka!Uka~P-ROd!pO!}^O~O#Q!qO#S!qO#T!qO#U!qO#V!qO#W!qO~OruO#Q!sO#SsO#TtO~OdyOy{O!O{X~Om!vOu!vO}!vO#QQO~O!O!xO~O#_!{O~P%[OymO#Z!}O#_#PO~O#Z#QO#_!{O~P-ROegO!]bO!_dO!aeO~P+xO#`#]O~P(rOP!WOQ!WOR!XOS!XO#`#]O~OT!ZOU![O#`#]O~O!Z!cO#`#]O~Od#^Om#^O!}^O~Od#_Og_O!}^O~O!Z!cO#Zja#fja#`ja!Qja!Tja!Uja~OegO!]bO!_dO!aeO#Z#dO~P+xO#Z!^a#f!^a!Q!^a!T!^a!U!^a~P*QO#Z!^a#f!^a!Q!^a!T!^a!U!^a~OP!WOQ!WOR!XOS!XO~P4nOT!ZOU![O~P4nOT!ZOU![OW!YOX!YOY!YOZ!YO[!YO]!YO~O!O#eO~P5kOT!ZOU![O!O#eO~Oy{O!O{a~OegO!]bO!_dO!aeO#Z#hO~P+xOymO#Z!}O#_#jO~O#Z#QO#_#lO~P-RO^!VORpiSpi#Zpi#fpi#`pi!Qpi!Tpi!Upi~OPpiQpi~P7kOP!WOQ!WO~P7kOP!WOQ!WORpiSpi#Zpi#fpi#`pi!Qpi!Tpi!Upi~OW!YOX!YOY!YOZ!YO[!YO]!YOT!Xi#Z!Xi#f!Xi#`!Xi!O!Xi!Q!Xi!T!Xi!U!Xi~OU![O~P9`OU![O~P9rOU!Xi~P9`OhROymO!VoO~P-RO!Q#oO!T#pO!U#qO~OegO!]bO!_dO!aeO#Z#tO!Q#]P!T#]P!U#]P~P+xOegO!]bO!_dO!aeO#Z#{O~P+xO!Q#oO!T#pO!U#|O~OymO#Z!}O#_$QO~O#Z#QO#_$RO~P-ROd$SO~O!O$TO~O!U$UO~O!T#pO!U$UO~O#Z$WO~OegO!]bO!_dO!aeO#Z#tO!Q#]X!T#]X!U#]X!e#]X!g#]X~P+xO!Q#oO!T#pO!U$YO~O!U$]O~OegO!]bO!_dO!aeO#Z#tO!U#]P!e#]P!g#]P~P+xO!U$`O~O!T#pO!U$`O~O!Q#oO!T#pO!U$bO~O!O$eO~OegO!]bO!_dO!aeO#Z$fO~P+xO!U$hO~O!U$iO~O!T#pO!U$iO~O!U$oO!e$kO!g$nO~O!U$qO~O!U$rO~O!T#pO!U$rO~OegO!]bO!_dO!aeO#Z$tO~P+xOegO!]bO!_dO!aeO#Z#tO!U#]P~P+xO!U$wO~O!U${O!e$kO!g$nO~O!O$}O~O!U${O~O!U%OO~OegO!]bO!_dO!aeO#Z#tO!T#]P!U#]P~P+xO!O%QO~P5kOT!ZOU![O!O%QO~O!U%RO~O#Z%SO~O#Z%TO~Omv~",
-  goto: "5{#fPPPPPPPPPPPPPPPPPPPPPPPPPP#g#}$dP%d#}&j'ZP(X(XPP(])WP)k*]*`PP*fP*r*{PPP+e,b-XP-`P-`P-`P-s-v.PP.TP-`-`.Z.a.g.m.s.}/Z/e/o/x0PPPPP0V0Z1OPP1i3QP4PPPPPPPPP4T4o4TPP4|5T5T5h5hrhOl!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TR!`^w`O^l!U!c!e!k!x#d#e#h#v#{$T$e$f$t%S%TtPO^l!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TznPUVdemr!Q!T!V!W!X!Y!Z![!|#R#_#`#k$kR#_!ctVO^l!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TzWPUVdemr!Q!T!V!W!X!Y!Z![!|#R#_#`#k$kQ!psQ#^!bR#`!cr[Ol!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TQ!^^Q!gdQ#T!WR#W!X!pWOPUV^delmr!Q!T!U!V!W!X!Y!Z![!e!k!x!|#R#_#`#d#e#h#k#v#{$T$e$f$k$t%S%TR!v{TuQw!qWOPUV^delmr!Q!T!U!V!W!X!Y!Z![!e!k!x!|#R#_#`#d#e#h#k#v#{$T$e$f$k$t%S%TYpPVr#_#`Q!RUQ!z!QX!}!R!z#O#irhOl!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TYoPVr#_#`Q!`^R!nmR!ORX|Rz}!uQ#s#cQ$O#gQ$[#xR$d$PQ#x#dQ$v$fR%P$tQ#r#cQ#}#gQ$V#sQ$Z#xQ$a$OQ$c$PQ$j$[R$s$d|WPUV^demr!Q!T!V!W!X!Y!Z![!|#R#_#`#k$ksXOl!U!e!k!x#d#e#h#v#{$T$e$f$t%S%Tr]Ol!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TQ!_^Q!hdQ!jeQ#X![Q#Z!ZR$y$kZpPVr#_#`shOl!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TR#z#eQ$_#{Q%U%SR%V%TT$l$_$mQ$p$_R$|$mQlOR!mlQwQR!rwQ!QUR!y!QQzRR!tzQ}RQ!uzT!w}!u^#v#d#h#{$f$t%S%TR$X#vQ#O!RQ#i!zT#m#O#iQ#R!TQ#k!|T#n#R#kWrPV#_#`R!orS!da!aR#b!dQ$m$_R$z$mTkOlSiOlQ#S!UQ#c!eQ#f!kQ#g!x`#u#d#h#v#{$f$t%S%TQ#y#eQ$g$TR$u$eraOl!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TQ!a^R#a!ctZO^l!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TYoPVr#_#`Q!TUQ!fdQ!ieQ!nmQ!|!QW#Q!T!|#R#kQ#T!VQ#U!WQ#V!XQ#X!YQ#Y!ZQ#[![R$x$krYOl!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TznPUVdemr!Q!T!V!W!X!Y!Z![!|#R#_#`#k$kR!]^TvQw!RSOPV^lmr!U!e!k!x#_#`#d#e#h#v#{$T$e$f$t%S%TU#w#d$f$tQ$P#hV$^#{%S%TZqPVr#_#`scOl!U!e!k!x#d#e#h#v#{$T$e$f$t%S%TsfOl!U!e!k!x#d#e#h#v#{$T$e$f$t%S%T",
-  nodeNames: "⚠ Star Slash Plus Minus And Or Eq EqEq Neq Lt Lte Gt Gte Modulo PlusEq MinusEq StarEq SlashEq ModuloEq Identifier AssignableIdentifier Word IdentifierBeforeDot Do Program PipeExpr FunctionCall DotGet Number ParenExpr FunctionCallOrIdentifier BinOp String StringFragment Interpolation EscapeSeq Boolean Regex Dict NamedArg NamedArgPrefix FunctionDef Params NamedParam Null colon CatchExpr keyword TryBlock FinallyExpr keyword keyword Underscore Array ConditionalOp PositionalArg operator TryExpr keyword Throw keyword IfExpr keyword SingleLineThenBlock ThenBlock ElseIfExpr keyword ElseExpr keyword CompoundAssign Assign",
-  maxTerm: 114,
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+  goto: "7v#lPPPPPPPPPPPPPPPPPPPPPPPPPP#m$V$nP%q$V&z'mP(n(nPP(r)pP*T*w*zPP+QP+^+gPPP,P-P-{P.SP.i.l.SP.SP.SP.o.r.{P/PP.S.S/V/]/c/i/o/y0W0b0l0u0|PPPP1S1W2PPP2l4YP5[PPPPPPPP5`5|5`PP6^6e6e6z6z7a7avjOn!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%aR!b^{`O^n!W!e!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%axPO^n!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%a|pPUVbfgot!S!V!X!Y!Z![!]!^#Q#V#c#d#p$wR#c!exVO^n!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%a|WPUVbfgot!S!V!X!Y!Z![!]!^#Q#V#c#d#p$wQ!tuQ#b!dR#d!ev[On!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%aQ!`^Q!kfQ#X!YR#[!Z!vWOPUV^bfgnot!S!V!W!X!Y!Z![!]!^!i!o!|#Q#V#c#d#g#i#j#m#p#v$O$T$`$q$r$w%Q%`%aR!z}TwQy!wWOPUV^bfgnot!S!V!W!X!Y!Z![!]!^!i!o!|#Q#V#c#d#g#i#j#m#p#v$O$T$`$q$r$w%Q%`%aYrPVt#c#dQ!TUQ#O!SX#R!T#O#S#nvjOn!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%aYqPVt#c#dQ!b^R!roR!QRX!OR|!P!yQ#{#hQ$W#lQ$g$QR$o$XQ$Q#iQ%S$rR%]%QQ#z#hQ$V#lQ$b#{Q$f$QQ$l$WQ$n$XQ$v$gR%P$o!OWPUV^bfgot!S!V!X!Y!Z![!]!^#Q#V#c#d#p$wwXOn!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%av]On!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%aQ!a^Q!hbQ!lfQ!ngQ#]!^Q#_!]R%V$wZrPVt#c#dwjOn!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%aR#u#gR$^#vR$S#jQ$j$TQ%b%`R%c%aT$x$j$yQ$|$jR%Y$yQnOR!qnQyQR!vyQ!SUR!}!SQ|RR!x|Q!PRQ!y|T!{!P!y`$O#i#m#v$T$r%Q%`%aR$d$OQ#S!TQ#n#OT#r#S#nQ#V!VQ#p#QT#s#V#pWtPV#c#dR!stS!fa!cR#f!fQ$y$jR%W$yTmOnSkOnQ#W!WQ#h!iQ#k!oQ#l!|Q#t#gb#}#i#m#v$O$T$r%Q%`%aQ$R#jQ$s$`R%R$qvaOn!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%aQ!c^R#e!exZO^n!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%aYqPVt#c#dQ!VUQ!gbQ!jfQ!mgQ!roQ#Q!SW#U!V#Q#V#pQ#X!XQ#Y!YQ#Z!ZQ#]![Q#^!]Q#`!^R%U$wvYOn!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%a|pPUVbfgot!S!V!X!Y!Z![!]!^#Q#V#c#d#p$wR!_^TxQy!VSOPV^not!W!i!o!|#c#d#g#i#j#m#v$O$T$`$q$r%Q%`%aU$P#i$r%QQ$X#mQ$]#vV$i$T%`%aZsPVt#c#dwcOn!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%aweOn!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%awhOn!W!i!o!|#g#i#j#m#v$O$T$`$q$r%Q%`%a",
+  nodeNames: "⚠ Star Slash Plus Minus And Or Eq EqEq Neq Lt Lte Gt Gte Modulo PlusEq MinusEq StarEq SlashEq ModuloEq Identifier AssignableIdentifier Word IdentifierBeforeDot Do Program PipeExpr FunctionCall DotGet Number ParenExpr FunctionCallOrIdentifier BinOp String StringFragment Interpolation EscapeSeq Boolean Regex Dict NamedArg NamedArgPrefix FunctionDef Params NamedParam Null colon CatchExpr keyword TryBlock FinallyExpr keyword keyword Underscore Array ConditionalOp PositionalArg operator WhileExpr keyword SingleLineBlock MultiLineBlock TryExpr keyword Throw keyword IfExpr keyword SingleLineThenBlock ThenBlock ElseIfExpr keyword ElseExpr keyword CompoundAssign Assign",
+  maxTerm: 120,
   context: trackScope,
   nodeProps: [
     ["closedBy", 46,"end"]
@@ -19,9 +19,9 @@ export const parser = LRParser.deserialize({
   propSources: [highlighting],
   skippedNodes: [0],
   repeatNodeCount: 11,
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-  tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO!|~~", 11)],
+  tokenData: "C_~R|OX#{XY$jYZ%TZp#{pq$jqs#{st%ntu'Vuw#{wx'[xy'ayz'zz{#{{|(e|}#{}!O+X!O!P#{!P!Q-n!Q![)S![!]6Z!]!^%T!^!}#{!}#O6t#O#P8j#P#Q8o#Q#R#{#R#S9Y#S#T#{#T#Y,Y#Y#Z9s#Z#b,Y#b#c>q#c#f,Y#f#g?n#g#h,Y#h#i@k#i#o,Y#o#p#{#p#qBo#q;'S#{;'S;=`$d<%l~#{~O#{~~CYS$QUrSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{S$gP;=`<%l#{^$qUrS!{YOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U%[UrS#_QOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{^%uZrS!|YOY%nYZ#{Zt%ntu&huw%nwx&hx#O%n#O#P&h#P;'S%n;'S;=`'P<%lO%nY&mS!|YOY&hZ;'S&h;'S;=`&y<%lO&hY&|P;=`<%l&h^'SP;=`<%l%n~'[O#W~~'aO#U~U'hUrS#RQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U(RUrS#dQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U(jWrSOt#{uw#{x!Q#{!Q![)S![#O#{#P;'S#{;'S;=`$d<%lO#{U)ZYrSmQOt#{uw#{x!O#{!O!P)y!P!Q#{!Q![)S![#O#{#P;'S#{;'S;=`$d<%lO#{U*OWrSOt#{uw#{x!Q#{!Q![*h![#O#{#P;'S#{;'S;=`$d<%lO#{U*oWrSmQOt#{uw#{x!Q#{!Q![*h![#O#{#P;'S#{;'S;=`$d<%lO#{U+^^rSOt#{uw#{x}#{}!O,Y!O!Q#{!Q![)S![!_#{!_!`-T!`#O#{#P#T#{#T#o,Y#o;'S#{;'S;=`$d<%lO#{U,_[rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#o,Y#o;'S#{;'S;=`$d<%lO#{U-[UyQrSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U-sWrSOt#{uw#{x!P#{!P!Q.]!Q#O#{#P;'S#{;'S;=`$d<%lO#{U.b^rSOY/^YZ#{Zt/^tu0auw/^wx0ax!P/^!P!Q#{!Q!}/^!}#O5S#O#P2o#P;'S/^;'S;=`6T<%lO/^U/e^rSvQOY/^YZ#{Zt/^tu0auw/^wx0ax!P/^!P!Q3U!Q!}/^!}#O5S#O#P2o#P;'S/^;'S;=`6T<%lO/^Q0fXvQOY0aZ!P0a!P!Q1R!Q!}0a!}#O1p#O#P2o#P;'S0a;'S;=`3O<%lO0aQ1UP!P!Q1XQ1^UvQ#Z#[1X#]#^1X#a#b1X#g#h1X#i#j1X#m#n1XQ1sVOY1pZ#O1p#O#P2Y#P#Q0a#Q;'S1p;'S;=`2i<%lO1pQ2]SOY1pZ;'S1p;'S;=`2i<%lO1pQ2lP;=`<%l1pQ2rSOY0aZ;'S0a;'S;=`3O<%lO0aQ3RP;=`<%l0aU3ZWrSOt#{uw#{x!P#{!P!Q3s!Q#O#{#P;'S#{;'S;=`$d<%lO#{U3zbrSvQOt#{uw#{x#O#{#P#Z#{#Z#[3s#[#]#{#]#^3s#^#a#{#a#b3s#b#g#{#g#h3s#h#i#{#i#j3s#j#m#{#m#n3s#n;'S#{;'S;=`$d<%lO#{U5X[rSOY5SYZ#{Zt5Stu1puw5Swx1px#O5S#O#P2Y#P#Q/^#Q;'S5S;'S;=`5}<%lO5SU6QP;=`<%l5SU6WP;=`<%l/^U6bUrS!OQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U6{W#^QrSOt#{uw#{x!_#{!_!`7e!`#O#{#P;'S#{;'S;=`$d<%lO#{U7jVrSOt#{uw#{x#O#{#P#Q8P#Q;'S#{;'S;=`$d<%lO#{U8WU#]QrSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{~8oO#X~U8vU#cQrSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U9aUrS!VQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U9x]rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#U:q#U#o,Y#o;'S#{;'S;=`$d<%lO#{U:v^rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#`,Y#`#a;r#a#o,Y#o;'S#{;'S;=`$d<%lO#{U;w^rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#g,Y#g#h<s#h#o,Y#o;'S#{;'S;=`$d<%lO#{U<x^rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#X,Y#X#Y=t#Y#o,Y#o;'S#{;'S;=`$d<%lO#{U={[uQrSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#o,Y#o;'S#{;'S;=`$d<%lO#{^>x[#YWrSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#o,Y#o;'S#{;'S;=`$d<%lO#{^?u[#[WrSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#o,Y#o;'S#{;'S;=`$d<%lO#{^@r^#ZWrSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#f,Y#f#gAn#g#o,Y#o;'S#{;'S;=`$d<%lO#{UAs^rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#i,Y#i#j<s#j#o,Y#o;'S#{;'S;=`$d<%lO#{UBvU!ZQrSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{~C_O#l~",
+  tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO#Q~~", 11)],
   topRules: {"Program":[0,25]},
   specialized: [{term: 20, get: (value: any, stack: any) => (specializeKeyword(value, stack) << 1), external: specializeKeyword},{term: 20, get: (value: keyof typeof spec_Identifier) => spec_Identifier[value] || -1}],
-  tokenPrec: 1619
+  tokenPrec: 1705
 })

src/parser/tests/control-flow.test.ts

@@ -154,3 +154,118 @@ describe('if/elseif/else', () => {
     `)
   })
 })
+
+describe('while', () => {
+  test('infinite loop', () => {
+    expect(`while true: true end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    Boolean true
+    colon :
+    SingleLineBlock
+      Boolean true
+    keyword end`)
+  })
+
+  test('basic expression', () => {
+    expect(`while a > 0: true end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    ConditionalOp
+      Identifier a
+      Gt >
+      Number 0
+    colon :
+    SingleLineBlock
+      Boolean true
+    keyword end`)
+  })
+
+
+  test('compound expression', () => {
+    expect(`while a > 0 and b < 100 and c < 1000: true end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    ConditionalOp
+      ConditionalOp
+        ConditionalOp
+          Identifier a
+          Gt >
+          Number 0
+        And and
+        ConditionalOp
+          Identifier b
+          Lt <
+          Number 100
+      And and
+      ConditionalOp
+        Identifier c
+        Lt <
+        Number 1000
+    colon :
+    SingleLineBlock
+      Boolean true
+    keyword end`)
+  })
+
+  test('multiline infinite loop', () => {
+    expect(`
+      while true: 
+        true 
+      end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    Boolean true
+    colon :
+    MultiLineBlock
+      Boolean true
+    keyword end`)
+  })
+
+  test('multiline basic expression', () => {
+    expect(`
+      while a > 0: 
+        true
+      end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    ConditionalOp
+      Identifier a
+      Gt >
+      Number 0
+    colon :
+    MultiLineBlock
+      Boolean true
+    keyword end`)
+  })
+
+
+  test('multiline compound expression', () => {
+    expect(`
+      while a > 0 and b < 100 and c < 1000: 
+        true 
+      end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    ConditionalOp
+      ConditionalOp
+        ConditionalOp
+          Identifier a
+          Gt >
+          Number 0
+        And and
+        ConditionalOp
+          Identifier b
+          Lt <
+          Number 100
+      And and
+      ConditionalOp
+        Identifier c
+        Lt <
+        Number 1000
+    colon :
+    MultiLineBlock
+      Boolean true
+    keyword end`)
+  })
+})