Merge branch 'list-and-dict-literals' into prelude

CLAUDE.md

@@ -207,6 +207,19 @@ Implementation files:
 
 **Why this matters**: This enables shell-like file paths (`readme.txt`) while supporting dictionary/array access (`config.path`) without quotes, determined entirely at parse time based on lexical scope.
 
+**Array and dict literals**: Square brackets `[]` create both arrays and dicts, distinguished by content:
+- **Arrays**: Space/newline/semicolon-separated args that work like calling a function → `[1 2 3]` (call functions using parens eg `[1 (double 4) 200]`)
+- **Dicts**: NamedArg syntax (key=value pairs) → `[a=1 b=2]` 
+- **Empty array**: `[]` (standard empty brackets)
+- **Empty dict**: `[=]` (exactly this, no spaces)
+
+Implementation details:
+- Grammar rules (shrimp.grammar:194-201): Dict uses `NamedArg` nodes, Array uses `expression` nodes
+- Parser distinguishes at parse time based on whether first element contains `=`
+- Both support multiline, comments, and nesting
+- Separators: spaces, newlines (`\n`), or semicolons (`;`) work interchangeably
+- Test files: `src/parser/tests/literals.test.ts` and `src/compiler/tests/literals.test.ts`
+
 **EOF handling**: The grammar uses `(statement | newlineOrSemicolon)+ eof?` to handle empty lines and end-of-file without infinite loops.
 
 ## Compiler Architecture

example.shrimp

@@ -42,13 +42,13 @@ a-file = file.txt
 3
 
 # symbols can be assigned to functions. The body of the function comes after a colon `:`
-add = fn x y: x + y
+add = do x y: x + y
 add 1 2
 ---
 3
 
 # Functions can have multiple lines, they are terminated with `end`
-sub = fn x y:
+sub = do x y:
   x - y
 end
 
@@ -82,9 +82,25 @@ add 1 (sub 5 2)
 4
 
 
+# Arrays use square brackets with space-separated elements
+numbers = [1 2 3]
+shopping-list = [apples bananas carrots]
+empty-array = []
+
+# Dicts use square brackets with key=value pairs
+config = [name=Shrimp version=1.0 debug=true]
+empty-dict = [=]  
+
+# Nested structures work naturally
+nested = [
+  users=[
+    [name=Alice age=30]
+    [name=Bob age=25]
+  ]
+  settings=[debug=true timeout=5000]
+]
+
 # HOLD UP
 
-- how do we handle arrays?
-- how do we handle hashes?
 - conditionals
 - loops

packages/ReefVM

@@ -0,0 +1 @@
+Subproject commit 97b6722a113417398a1c47d583bfe07a906f87a0

src/compiler/compiler.ts

@@ -468,6 +468,44 @@ export class Compiler {
         return instructions
       }
 
+      case terms.Array: {
+        const children = getAllChildren(node)
+
+        // We can easily parse [=] as an empty dict, but `[ = ]` is tougher.
+        // = can be a valid word, and is also valid inside words, so for now we cheat
+        // and check for arrays that look like `[ = ]` to interpret them as
+        // empty dicts
+        if (children.length === 1 && children[0]!.name === 'Word') {
+          const child = children[0]!
+          if (input.slice(child.from, child.to) === '=') {
+            return [['MAKE_DICT', 0]]
+          }
+        }
+
+        const instructions: ProgramItem[] = children.map((x) => this.#compileNode(x, input)).flat()
+        instructions.push(['MAKE_ARRAY', children.length])
+        return instructions
+      }
+
+      case terms.Dict: {
+        const children = getAllChildren(node)
+        const instructions: ProgramItem[] = []
+
+        children.forEach((node) => {
+          const keyNode = node.firstChild
+          const valueNode = node.firstChild!.nextSibling
+
+          // name= -> name
+          const key = input.slice(keyNode!.from, keyNode!.to).slice(0, -1)
+          instructions.push(['PUSH', key])
+
+          instructions.push(...this.#compileNode(valueNode!, input))
+        })
+
+        instructions.push(['MAKE_DICT', children.length])
+        return instructions
+      }
+
       default:
         throw new CompilerError(
           `Compiler doesn't know how to handle a "${node.type.name}" node.`,

src/compiler/tests/literals.test.ts

@@ -0,0 +1,157 @@
+import { describe } from 'bun:test'
+import { expect, test } from 'bun:test'
+
+describe('array literals', () => {
+  test('work with numbers', () => {
+    expect('[1 2 3]').toEvaluateTo([1, 2, 3])
+  })
+
+  test('work with strings', () => {
+    expect("['one' 'two' 'three']").toEvaluateTo(['one', 'two', 'three'])
+  })
+
+  test('work with identifiers', () => {
+    expect('[one two three]').toEvaluateTo(['one', 'two', 'three'])
+  })
+
+  test('can be nested', () => {
+    expect('[one [two [three]]]').toEvaluateTo(['one', ['two', ['three']]])
+  })
+
+  test('can span multiple lines', () => {
+    expect(`[
+      1
+      2
+      3
+    ]`).toEvaluateTo([1, 2, 3])
+  })
+
+  test('can span multiple w/o calling functions', () => {
+    expect(`[
+      one
+      two
+      three
+    ]`).toEvaluateTo(['one', 'two', 'three'])
+  })
+
+  test('empty arrays', () => {
+    expect('[]').toEvaluateTo([])
+  })
+
+  test('mixed types', () => {
+    expect("[1 'two' three true null]").toEvaluateTo([1, 'two', 'three', true, null])
+  })
+
+  test('semicolons as separators', () => {
+    expect('[1; 2; 3]').toEvaluateTo([1, 2, 3])
+  })
+
+  test('expressions in arrays', () => {
+    expect('[(1 + 2) (3 * 4)]').toEvaluateTo([3, 12])
+  })
+
+  test('mixed separators - spaces and newlines', () => {
+    expect(`[1 2
+3 4]`).toEvaluateTo([1, 2, 3, 4])
+  })
+
+  test('mixed separators - spaces and semicolons', () => {
+    expect('[1 2; 3 4]').toEvaluateTo([1, 2, 3, 4])
+  })
+
+  test('empty lines within arrays', () => {
+    expect(`[1
+
+2]`).toEvaluateTo([1, 2])
+  })
+
+  test('comments within arrays', () => {
+    expect(`[1 # first
+  2 # second
+  ]`).toEvaluateTo([1, 2])
+  })
+
+  test('complex nested multiline', () => {
+    expect(`[
+  [1 2]
+  [3 4]
+  [5 6]
+]`).toEvaluateTo([
+      [1, 2],
+      [3, 4],
+      [5, 6],
+    ])
+  })
+
+  test('boolean and null literals', () => {
+    expect('[true false null]').toEvaluateTo([true, false, null])
+  })
+
+  test('regex literals', () => {
+    expect('[//[0-9]+//]').toEvaluateTo([/[0-9]+/])
+  })
+
+  test('trailing newlines', () => {
+    expect(`[
+1
+2
+]`).toEvaluateTo([1, 2])
+  })
+})
+
+describe('dict literals', () => {
+  test('work with numbers', () => {
+    expect('[a=1 b=2 c=3]').toEvaluateTo({ a: 1, b: 2, c: 3 })
+  })
+
+  test('work with strings', () => {
+    expect("[a='one' b='two' c='three']").toEvaluateTo({ a: 'one', b: 'two', c: 'three' })
+  })
+
+  test('work with identifiers', () => {
+    expect('[a=one b=two c=three]').toEvaluateTo({ a: 'one', b: 'two', c: 'three' })
+  })
+
+  test('can be nested', () => {
+    expect('[a=one b=[two [c=three]]]').toEvaluateTo({ a: 'one', b: ['two', { c: 'three' }] })
+  })
+
+  test('can span multiple lines', () => {
+    expect(`[
+        a=1
+        b=2
+        c=3
+      ]`).toEvaluateTo({ a: 1, b: 2, c: 3 })
+  })
+
+  test('empty dict', () => {
+    expect('[=]').toEvaluateTo({})
+    expect('[ = ]').toEvaluateTo({})
+  })
+
+  test('mixed types', () => {
+    expect("[a=1 b='two' c=three d=true e=null]").toEvaluateTo({
+      a: 1,
+      b: 'two',
+      c: 'three',
+      d: true,
+      e: null,
+    })
+  })
+
+  test('semicolons as separators', () => {
+    expect('[a=1; b=2; c=3]').toEvaluateTo({ a: 1, b: 2, c: 3 })
+  })
+
+  test('expressions in dicts', () => {
+    expect('[a=(1 + 2) b=(3 * 4)]').toEvaluateTo({ a: 3, b: 12 })
+  })
+
+  test('empty lines within dicts', () => {
+    expect(`[a=1
+
+  b=2
+
+  c=3]`).toEvaluateTo({ a: 1, b: 2, c: 3 })
+  })
+})

src/parser/shrimp.grammar

@@ -191,6 +191,15 @@ EscapeSeq {
   "\\" ("$" | "n" | "t" | "r" | "\\" | "'")
 }
 
+Dict {
+  "[=]" |
+  "[" newlineOrSemicolon* NamedArg (newlineOrSemicolon | NamedArg)* "]"
+}
+
+Array {
+  "[" newlineOrSemicolon* (expression (newlineOrSemicolon | expression)*)? "]"
+}
+
 // We need expressionWithoutIdentifier to avoid conflicts in consumeToTerminator.
 // Without this, when parsing "my-var" at statement level, the parser can't decide:
 //   - ambiguousFunctionCall → FunctionCallOrIdentifier → Identifier
@@ -200,7 +209,7 @@ EscapeSeq {
 // to go through ambiguousFunctionCall (which is what we want semantically).
 // Yes, it is annoying and I gave up trying to use GLR to fix it.
 expressionWithoutIdentifier {
-  ParenExpr | Word | String | Number | Boolean | Regex | @specialize[@name=Null]<Identifier, "null">
+  ParenExpr | Word | String | Number | Boolean | Regex | Dict | Array | @specialize[@name=Null]<Identifier, "null">
 }
 
 block {

src/parser/shrimp.terms.ts

@@ -31,19 +31,21 @@ export const
   EscapeSeq = 29,
   Boolean = 30,
   Regex = 31,
-  Null = 32,
+  Dict = 32,
-  ConditionalOp = 33,
+  NamedArg = 33,
-  FunctionDef = 34,
+  NamedArgPrefix = 34,
-  Params = 35,
+  FunctionDef = 35,
-  colon = 36,
+  Params = 36,
-  keyword = 50,
+  colon = 37,
-  PositionalArg = 38,
+  keyword = 52,
   Underscore = 39,
-  NamedArg = 40,
+  Array = 40,
-  NamedArgPrefix = 41,
+  Null = 41,
-  IfExpr = 43,
+  ConditionalOp = 42,
-  SingleLineThenBlock = 45,
+  PositionalArg = 43,
-  ThenBlock = 46,
+  IfExpr = 45,
-  ElseIfExpr = 47,
+  SingleLineThenBlock = 47,
-  ElseExpr = 49,
+  ThenBlock = 48,
-  Assign = 51
+  ElseIfExpr = 49,
+  ElseExpr = 51,
+  Assign = 53

src/parser/shrimp.ts

@@ -4,24 +4,24 @@ import {operatorTokenizer} from "./operatorTokenizer"
 import {tokenizer, specializeKeyword} from "./tokenizer"
 import {trackScope} from "./scopeTracker"
 import {highlighting} from "./highlight"
-const spec_Identifier = {__proto__:null,null:64, end:74, if:88, elseif:96, else:100}
+const spec_Identifier = {__proto__:null,end:76, null:82, if:92, elseif:100, else:104}
 export const parser = LRParser.deserialize({
   version: 14,
-  states: "/SQYQbOOO!TOpO'#CqO#aQcO'#CtO$ZOSO'#CvO%aQcO'#DsOOQa'#Ds'#DsO&gQcO'#DrO'OQRO'#CuO'^QcO'#DnO'uQbO'#D{OOQ`'#DO'#DOO'}QbO'#CsOOQ`'#Do'#DoO(oQbO'#DnO(}QbO'#EROOQ`'#DX'#DXO)lQRO'#DaOOQ`'#Dn'#DnO)qQQO'#DmOOQ`'#Dm'#DmOOQ`'#Db'#DbQYQbOOO)yObO,59]OOQa'#Dr'#DrOOQ`'#DS'#DSO*RQbO'#DUOOQ`'#EQ'#EQOOQ`'#Df'#DfO*]QbO,59[O*pQbO'#CxO*xQWO'#CyOOOO'#Du'#DuOOOO'#Dc'#DcO+^OSO,59bOOQa,59b,59bO(}QbO,59aO(}QbO,59aOOQ`'#Dd'#DdO+lQbO'#DPO+tQQO,5:gO+yQRO,59_O-`QRO'#CuO-pQRO,59_O-|QQO,59_O.RQQO,59_O.ZQbO'#DgO.fQbO,59ZO.wQRO,5:mO/OQQO,5:mO/TQbO,59{OOQ`,5:X,5:XOOQ`-E7`-E7`OOQa1G.w1G.wOOQ`,59p,59pOOQ`-E7d-E7dOOOO,59d,59dOOOO,59e,59eOOOO-E7a-E7aOOQa1G.|1G.|OOQa1G.{1G.{O/_QcO1G.{OOQ`-E7b-E7bO/yQbO1G0ROOQa1G.y1G.yO(}QbO,59iO(}QbO,59iO!YQbO'#CtO$iQbO'#CpOOQ`,5:R,5:ROOQ`-E7e-E7eO0WQbO1G0XOOQ`1G/g1G/gO0eQbO7+%mO0jQbO7+%nOOQO1G/T1G/TO0zQRO1G/TOOQ`'#DZ'#DZO1UQbO7+%sO1ZQbO7+%tOOQ`<<IX<<IXOOQ`'#De'#DeO1qQQO'#DeO1vQbO'#EOO2^QbO<<IYOOQ`<<I_<<I_OOQ`'#D['#D[O2cQbO<<I`OOQ`,5:P,5:POOQ`-E7c-E7cOOQ`AN>tAN>tO(}QbO'#D]OOQ`'#Dh'#DhO2nQbOAN>zO2yQQO'#D_OOQ`AN>zAN>zO3OQbOAN>zO3TQRO,59wO3[QQO,59wOOQ`-E7f-E7fOOQ`G24fG24fO3aQbOG24fO3fQQO,59yO3kQQO1G/cOOQ`LD*QLD*QO0jQbO1G/eO1ZQbO7+$}OOQ`7+%P7+%POOQ`<<Hi<<Hi",
+  states: "2YQYQbOOO!ZOpO'#CqO#mQcO'#CtO$gOSO'#CvO$uQbO'#ETOOQ`'#DP'#DPOOQa'#C|'#C|O%xQbO'#DUO&}QcO'#DxOOQa'#Dx'#DxO(TQcO'#DwO(lQRO'#CuO(zQcO'#DsO)cQbO'#CsOOQ`'#Dt'#DtO*ZQbO'#DsO*iQbO'#EZOOQ`'#DZ'#DZO+^QRO'#DcOOQ`'#Ds'#DsO+cQQO'#DrOOQ`'#Dr'#DrOOQ`'#Dd'#DdQYQbOOO+kObO,59]O+sQbO'#C}OOQa'#Dw'#DwOOQ`'#DX'#DXOOQ`'#EY'#EYOOQ`'#Dk'#DkO+}QbO,59[O,bQbO'#CxO,jQWO'#CyOOOO'#Dz'#DzOOOO'#De'#DeO-OOSO,59bOOQa,59b,59bOOQ`'#Dg'#DgO-^QbO'#DQO-fQQO,5:oOOQ`'#Df'#DfO-kQbO,59pO-rQQO,59hOOQa,59p,59pO-}QbO,59pO*iQbO,59aO*iQbO,59aO.XQRO,59_O/nQRO'#CuO0OQRO,59_O0[QQO,59_O0aQQO,59_O0iQbO'#DlO0tQbO,59ZO1VQRO,5:uO1^QQO,5:uO1cQbO,59}OOQ`,5:^,5:^OOQ`-E7b-E7bOOQa1G.w1G.wOOQ`,59i,59iOOQ`-E7i-E7iOOOO,59d,59dOOOO,59e,59eOOOO-E7c-E7cOOQa1G.|1G.|OOQ`-E7e-E7eO1mQbO1G0ZOOQ`-E7d-E7dO1zQQO1G/SOOQa1G/[1G/[O2VQbO1G/[OOQO'#Di'#DiO1zQQO1G/SOOQa1G/S1G/SOOQ`'#Dj'#DjO2VQbO1G/[OOQa1G.{1G.{O2aQcO1G.{OOQa1G.y1G.yO*iQbO,59rO*iQbO,59rO!`QbO'#CtO&PQbO'#CpOOQ`,5:W,5:WOOQ`-E7j-E7jO2{QbO1G0aOOQ`1G/i1G/iO3YQbO7+%uO3_QbO7+%vO3oQQO7+$nOOQa7+$n7+$nO3zQbO7+$vOOQa7+$v7+$vOOQO-E7g-E7gOOQ`-E7h-E7hOOQO1G/^1G/^O4UQRO1G/^OOQ`'#D]'#D]O4`QbO7+%{O4eQbO7+%|OOQ`<<Ia<<IaOOQ`'#Dh'#DhO4{QQO'#DhO5QQbO'#EVO5hQbO<<IbOOQa<<HY<<HYOOQa<<Hb<<HbOOQ`<<Ig<<IgOOQ`'#D^'#D^O5mQbO<<IhOOQ`,5:S,5:SOOQ`-E7f-E7fOOQ`AN>|AN>|O*iQbO'#D_OOQ`'#Dm'#DmO5xQbOAN?SO6TQQO'#DaOOQ`AN?SAN?SO6YQbOAN?SO6_QRO,59yO6fQQO,59yOOQ`-E7k-E7kOOQ`G24nG24nO6kQbOG24nO6pQQO,59{O6uQQO1G/eOOQ`LD*YLD*YO3_QbO1G/gO4eQbO7+%POOQ`7+%R7+%ROOQ`<<Hk<<Hk",
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+  stateData: "6}~O!dOS!eOS~O]QO^bO_XO`POaSOfXOnXOoXOyXO!O`O!j]O!mRO!tUO!uVO!veO~O!ihO~O]jO_XO`POaSOfXOnXOoXOriOwkOyXO!j]O!mRO!tUO!uVO|hX!vhX#PhX!{hXvhX~OP!kXQ!kXR!kXS!kXT!kXU!kXV!kXW!kXX!kXY!kXZ!kX[!kX~P!`OkqO!mtO!ooO!ppO~O]uOutP~O]jO_XO`POfXOnXOoXOriOyXO!j]O!mRO!tUO!uVO!vxO~O!z{O~P$}O]jO_XO`POaSOfXOnXOoXOriOwkOyXO!j]O!mRO!tUO!uVO~OP!lXQ!lXR!lXS!lX!v!lX#P!lXT!lXU!lXV!lXW!lXX!lXY!lXZ!lX[!lX!{!lXv!lX~P&POP!kXQ!kXR!kXS!kX!v!gX#P!gXv!gX~OP}OQ}OR!OOS!OO~OP}OQ}OR!OOS!OO!v!gX#P!gXv!gX~O]QO_XO`POaSOfXOnXOoXOyXO!j]O!mRO!tUO!uVO~O|!UO!v!gX#P!gXv!gX~O]jO_XO`POfXOnXOoXOyXO!j]O!mRO!tUO!uVO~OV!YO~O!v!ZO#P!ZO~O]!]Of!]O~OaSOw!^O~P*iO|da!vda#Pda!{davda~P&PO]!`O!j]O~O!m!aO!o!aO!p!aO!q!aO!r!aO!s!aO~OkqO!m!cO!ooO!ppO~O]uOutX~Ou!eO~O!z!hO~P$}OriO!v!jO!z!lO~O!v!mO!z!hO~P*iO!{!qOP!kXQ!kXR!kXS!kXT!kXU!kXV!kXW!kXX!kXY!kXZ!kX[!kX~OT!sOU!sOV!rOW!rOX!rOY!rOZ!rO[!rO~OP}OQ}OR!OOS!OO~P/SOP}OQ}OR!OOS!OO!{!qO~O|!UO!{!qO~O]!tO`PO!j]O~O|!UO!vca#Pca!{cavca~Ou!xO~P/SOu!xO~O^bO!O`O~P)cO^bO!O`O!v!{O~P)cOriO!v!jO!z!}O~O!v!mO!z#PO~P*iOP}OQ}ORiiSii!vii#Pii!{iivii~O^bO!O`O!v#WO~P)cOv#XO~O^bO!O`O!v#YOv!yP~P)cOriO!v!jO!z#^O~O!v!mO!z#_O~P*iO!{ziuzi~P/SOv#`O~O^bO!O`O!v#YOv!yP!S!yP!U!yP~P)cO!v#cO~O^bO!O`O!v#YOv!yX!S!yX!U!yX~P)cOv#eO~Ov#jO!S#fO!U#iO~Ov#oO!S#fO!U#iO~Ou#qO~Ov#oO~Ou#rO~P/SOu#rO~Ov#sO~O!v#tO~O!v#uO~Ofo~",
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-  tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO!d~~", 11)],
+  tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO!i~~", 11)],
   topRules: {"Program":[0,18]},
   specialized: [{term: 13, get: (value: any, stack: any) => (specializeKeyword(value, stack) << 1), external: specializeKeyword},{term: 13, get: (value: keyof typeof spec_Identifier) => spec_Identifier[value] || -1}],
-  tokenPrec: 860
+  tokenPrec: 1008
 })

src/parser/tests/literals.test.ts

@@ -0,0 +1,492 @@
+import { expect, describe, test } from 'bun:test'
+
+import '../shrimp.grammar' // Importing this so changes cause it to retest!
+
+describe('array literals', () => {
+  test('work with numbers', () => {
+    expect('[1 2 3]').toMatchTree(`
+      Array
+        Number 1
+        Number 2
+        Number 3
+    `)
+  })
+
+  test('work with strings', () => {
+    expect("['one' 'two' 'three']").toMatchTree(`
+      Array
+        String
+          StringFragment one
+        String
+          StringFragment two
+        String
+          StringFragment three
+    `)
+  })
+
+  test('work with identifiers', () => {
+    expect('[one two three]').toMatchTree(`
+      Array
+        Identifier one
+        Identifier two
+        Identifier three
+    `)
+  })
+
+  test('can be nested', () => {
+    expect('[one [two [three]]]').toMatchTree(`
+      Array
+        Identifier one
+        Array
+          Identifier two
+          Array
+            Identifier three
+    `)
+  })
+
+  test('can span multiple lines', () => {
+    expect(`[
+      1
+      2
+      3
+    ]`).toMatchTree(`
+      Array
+        Number 1
+        Number 2
+        Number 3
+    `)
+  })
+
+  test('can span multiple w/o calling functions', () => {
+    expect(`[
+      one
+      two
+      three
+    ]`).toMatchTree(`
+      Array
+        Identifier one
+        Identifier two
+        Identifier three
+    `)
+  })
+
+  test('empty arrays', () => {
+    expect('[]').toMatchTree(`
+      Array []
+    `)
+  })
+
+  test('mixed types', () => {
+    expect("[1 'two' three true null]").toMatchTree(`
+      Array
+        Number 1
+        String
+          StringFragment two
+        Identifier three
+        Boolean true
+        Null null
+    `)
+  })
+
+  test('semicolons as separators', () => {
+    expect('[1; 2; 3]').toMatchTree(`
+      Array
+        Number 1
+        Number 2
+        Number 3
+    `)
+  })
+
+  test('expressions in arrays', () => {
+    expect('[(1 + 2) (3 * 4)]').toMatchTree(`
+      Array
+        ParenExpr
+          BinOp
+            Number 1
+            Plus +
+            Number 2
+        ParenExpr
+          BinOp
+            Number 3
+            Star *
+            Number 4
+    `)
+  })
+
+  test('mixed separators - spaces and newlines', () => {
+    expect(`[1 2
+3 4]`).toMatchTree(`
+      Array
+        Number 1
+        Number 2
+        Number 3
+        Number 4
+    `)
+  })
+
+  test('mixed separators - spaces and semicolons', () => {
+    expect('[1 2; 3 4]').toMatchTree(`
+      Array
+        Number 1
+        Number 2
+        Number 3
+        Number 4
+    `)
+  })
+
+  test('empty lines within arrays', () => {
+    expect(`[1
+
+2]`).toMatchTree(`
+      Array
+        Number 1
+        Number 2
+    `)
+  })
+
+  test('comments within arrays', () => {
+    expect(`[ # something...
+      1 # first
+      2 # second
+    ]`).toMatchTree(`
+      Array
+        Number 1
+        Number 2
+    `)
+  })
+
+  test('complex nested multiline', () => {
+    expect(`[
+  [1 2]
+  [3 4]
+  [5 6]
+]`).toMatchTree(`
+      Array
+        Array
+          Number 1
+          Number 2
+        Array
+          Number 3
+          Number 4
+        Array
+          Number 5
+          Number 6
+    `)
+  })
+
+  test('boolean and null literals', () => {
+    expect('[true false null]').toMatchTree(`
+      Array
+        Boolean true
+        Boolean false
+        Null null
+    `)
+  })
+
+  test('regex literals', () => {
+    expect('[//[0-9]+//]').toMatchTree(`
+      Array
+        Regex //[0-9]+//
+    `)
+  })
+
+  test('trailing newlines', () => {
+    expect(`[
+1
+2
+]`).toMatchTree(`
+      Array
+        Number 1
+        Number 2
+    `)
+  })
+})
+
+describe('dict literals', () => {
+  test('work with numbers', () => {
+    expect('[a=1 b=2 c=3]').toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Number 1
+        NamedArg
+          NamedArgPrefix b=
+          Number 2
+        NamedArg
+          NamedArgPrefix c=
+          Number 3
+    `)
+  })
+
+  test('work with strings', () => {
+    expect("[a='one' b='two' c='three']").toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          String
+            StringFragment one
+        NamedArg
+          NamedArgPrefix b=
+          String
+            StringFragment two
+        NamedArg
+          NamedArgPrefix c=
+          String
+            StringFragment three
+    `)
+  })
+
+  test('work with identifiers', () => {
+    expect('[a=one b=two c=three]').toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Identifier one
+        NamedArg
+          NamedArgPrefix b=
+          Identifier two
+        NamedArg
+          NamedArgPrefix c=
+          Identifier three
+    `)
+  })
+
+  test('can be nested', () => {
+    expect('[a=one b=[two [c=three]]]').toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Identifier one
+        NamedArg
+          NamedArgPrefix b=
+          Array
+            Identifier two
+            Dict
+              NamedArg
+                NamedArgPrefix c=
+                Identifier three
+    `)
+  })
+
+  test('can span multiple lines', () => {
+    expect(`[
+      a=1
+      b=2
+      c=3
+    ]`).toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Number 1
+        NamedArg
+          NamedArgPrefix b=
+          Number 2
+        NamedArg
+          NamedArgPrefix c=
+          Number 3
+    `)
+  })
+  test('empty dict', () => {
+    expect('[=]').toMatchTree(`
+      Dict [=]
+    `)
+
+    expect('[ = ]').toMatchTree(`
+      Array
+        Word =
+    `)
+  })
+
+  test('mixed types', () => {
+    expect("[a=1 b='two' c=three d=true e=null]").toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Number 1
+        NamedArg
+          NamedArgPrefix b=
+          String
+            StringFragment two
+        NamedArg
+          NamedArgPrefix c=
+          Identifier three
+        NamedArg
+          NamedArgPrefix d=
+          Boolean true
+        NamedArg
+          NamedArgPrefix e=
+          Null null
+    `)
+  })
+
+  test('semicolons as separators', () => {
+    expect('[a=1; b=2; c=3]').toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Number 1
+        NamedArg
+          NamedArgPrefix b=
+          Number 2
+        NamedArg
+          NamedArgPrefix c=
+          Number 3
+    `)
+  })
+
+  test('expressions in dicts', () => {
+    expect('[a=(1 + 2) b=(3 * 4)]').toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          ParenExpr
+            BinOp
+              Number 1
+              Plus +
+              Number 2
+        NamedArg
+          NamedArgPrefix b=
+          ParenExpr
+            BinOp
+              Number 3
+              Star *
+              Number 4
+    `)
+  })
+
+  test('mixed separators - spaces and newlines', () => {
+    expect(`[a=1 b=2
+c=3]`).toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Number 1
+        NamedArg
+          NamedArgPrefix b=
+          Number 2
+        NamedArg
+          NamedArgPrefix c=
+          Number 3
+    `)
+  })
+
+  test('empty lines within dicts', () => {
+    expect(`[a=1
+
+b=2
+
+c=3]`).toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Number 1
+        NamedArg
+          NamedArgPrefix b=
+          Number 2
+        NamedArg
+          NamedArgPrefix c=
+          Number 3
+    `)
+  })
+
+  test('comments within dicts', () => {
+    expect(`[ # something...
+      a=1 # first
+      b=2 # second
+
+      c=3
+    ]`).toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Number 1
+        NamedArg
+          NamedArgPrefix b=
+          Number 2
+        NamedArg
+          NamedArgPrefix c=
+          Number 3
+    `)
+  })
+
+  test('complex nested multiline', () => {
+    expect(`[
+  a=[a=1 b=2]
+  b=[b=3 c=4]
+  c=[c=5 d=6]
+]`).toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Dict
+            NamedArg
+              NamedArgPrefix a=
+              Number 1
+            NamedArg
+              NamedArgPrefix b=
+              Number 2
+        NamedArg
+          NamedArgPrefix b=
+          Dict
+            NamedArg
+              NamedArgPrefix b=
+              Number 3
+            NamedArg
+              NamedArgPrefix c=
+              Number 4
+        NamedArg
+          NamedArgPrefix c=
+          Dict
+            NamedArg
+              NamedArgPrefix c=
+              Number 5
+            NamedArg
+              NamedArgPrefix d=
+              Number 6
+    `)
+  })
+
+  test('boolean and null literals', () => {
+    expect('[a=true b=false c=null]').toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Boolean true
+        NamedArg
+          NamedArgPrefix b=
+          Boolean false
+        NamedArg
+          NamedArgPrefix c=
+          Null null
+    `)
+  })
+
+  test('regex literals', () => {
+    expect('[pattern=//[0-9]+//]').toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix pattern=
+          Regex //[0-9]+//
+    `)
+  })
+
+  test('trailing newlines', () => {
+    expect(`[
+a=1
+b=2
+c=3
+
+]`).toMatchTree(`
+      Dict
+        NamedArg
+          NamedArgPrefix a=
+          Number 1
+        NamedArg
+          NamedArgPrefix b=
+          Number 2
+        NamedArg
+          NamedArgPrefix c=
+          Number 3
+    `)
+  })
+})

src/parser/tokenizer.ts

@@ -195,7 +195,13 @@ const isWhiteSpace = (ch: number): boolean => {
 }
 
 const isWordChar = (ch: number): boolean => {
-  return !isWhiteSpace(ch) && ch !== 10 /* \n */ && ch !== 41 /* ) */ && ch !== -1 /* EOF */
+  return (
+    !isWhiteSpace(ch) &&
+    ch !== 10 /* \n */ &&
+    ch !== 41 /* ) */ &&
+    ch !== 93 /* ] */ &&
+    ch !== -1 /* EOF */
+  )
 }
 
 const isLowercaseLetter = (ch: number): boolean => {

src/testSetup.ts

@@ -105,11 +105,14 @@ expect.extend({
       if (expected instanceof RegExp) expected = String(expected)
       if (value instanceof RegExp) value = String(value)
 
-      if (value === expected) {
+      if (isEqual(value, expected)) {
         return { pass: true }
       } else {
         return {
-          message: () => `Expected evaluation to be ${expected}, but got ${value}`,
+          message: () =>
+            `Expected evaluation to be ${JSON.stringify(expected)}, but got ${JSON.stringify(
+              value
+            )}`,
           pass: false,
         }
       }
@@ -161,3 +164,29 @@ const trimWhitespace = (str: string): string => {
     })
     .join('\n')
 }
+
+function isEqual(a: any, b: any): boolean {
+  if (a === null && b === null) return true
+
+  switch (typeof a) {
+    case 'string':
+    case 'number':
+    case 'boolean':
+    case 'undefined':
+      return a === b
+    default:
+      return JSON.stringify(sortKeys(a)) === JSON.stringify(sortKeys(b))
+  }
+}
+
+function sortKeys(o: any): any {
+  if (Array.isArray(o)) return o.map(sortKeys)
+  if (o && typeof o === 'object' && o.constructor === Object)
+    return Object.keys(o)
+      .sort()
+      .reduce((r, k) => {
+        r[k] = sortKeys(o[k])
+        return r
+      }, {} as any)
+  return o
+}

src/utils/tree.ts

@@ -1,6 +1,6 @@
 import { Tree, TreeCursor } from '@lezer/common'
 import { assertNever } from '#utils/utils'
-import { type Value } from 'reefvm'
+import { type Value, fromValue } from 'reefvm'
 
 export const treeToString = (tree: Tree, input: string): string => {
   const lines: string[] = []
@@ -35,27 +35,6 @@ export const treeToString = (tree: Tree, input: string): string => {
 }
 
 export const VMResultToValue = (result: Value): unknown => {
-  if (
+  if (result.type === 'function') return Function
-    result.type === 'number' ||
+  else return fromValue(result)
-    result.type === 'boolean' ||
-    result.type === 'string' ||
-    result.type === 'regex'
-  ) {
-    return result.value
-  } else if (result.type === 'null') {
-    return null
-  } else if (result.type === 'array') {
-    return result.value.map(VMResultToValue)
-  } else if (result.type === 'dict') {
-    const obj: Record<string, unknown> = {}
-    for (const [key, val] of Object.entries(result.value)) {
-      obj[key] = VMResultToValue(val)
-    }
-
-    return obj
-  } else if (result.type === 'function') {
-    return Function
-  } else {
-    assertNever(result)
-  }
 }