allow _ in numbers (10_000_000)

Reviewed-on: #33

bin/repl

@@ -145,7 +145,7 @@ async function repl() {
     }
 
     try {
-      const compiler = new Compiler(trimmed, Object.keys(globals))
+      const compiler = new Compiler(trimmed, [...Object.keys(globals), ...vm.vars()])
 
       // Save VM state before appending bytecode, in case execution fails
       const savedInstructions = [...vm.instructions]
@@ -235,7 +235,7 @@ async function loadFile(filePath: string): Promise<{ vm: VM; codeHistory: string
       if (!trimmed) continue
 
       try {
-        const compiler = new Compiler(trimmed)
+        const compiler = new Compiler(trimmed, [...Object.keys(globals), ...vm.vars()])
         vm.appendBytecode(compiler.bytecode)
         await vm.continue()
         codeHistory.push(trimmed)

bin/shrimp

@@ -1,50 +1,14 @@
 #!/usr/bin/env bun
 
-import { Compiler } from '../src/compiler/compiler'
+import { colors } from '../src/prelude'
-import { colors, globals } from '../src/prelude'
-import { parser } from '../src/parser/shrimp'
 import { treeToString } from '../src/utils/tree'
-import { VM, fromValue, bytecodeToString } from 'reefvm'
+import { runFile, compileFile, parseCode } from '../src'
+import { bytecodeToString } from 'reefvm'
 import { readFileSync, writeFileSync, mkdirSync } from 'fs'
 import { randomUUID } from 'crypto'
 import { spawn } from 'child_process'
 import { join } from 'path'
 
-async function runFile(filePath: string) {
-  try {
-    const code = readFileSync(filePath, 'utf-8')
-    const compiler = new Compiler(code, Object.keys(globals))
-    const vm = new VM(compiler.bytecode, globals)
-    await vm.run()
-    return vm.stack.length ? fromValue(vm.stack[vm.stack.length - 1]) : null
-  } catch (error: any) {
-    console.error(`${colors.red}Error:${colors.reset} ${error.message}`)
-    process.exit(1)
-  }
-}
-
-async function compileFile(filePath: string) {
-  try {
-    const code = readFileSync(filePath, 'utf-8')
-    const compiler = new Compiler(code)
-    return bytecodeToString(compiler.bytecode)
-  } catch (error: any) {
-    console.error(`${colors.red}Error:${colors.reset} ${error.message}`)
-    process.exit(1)
-  }
-}
-
-async function parseFile(filePath: string) {
-  try {
-    const code = readFileSync(filePath, 'utf-8')
-    const tree = parser.parse(code)
-    return treeToString(tree, code)
-  } catch (error: any) {
-    console.error(`${colors.red}Error:${colors.reset} ${error.message}`)
-    process.exit(1)
-  }
-}
-
 function showHelp() {
   console.log(`${colors.bright}${colors.magenta}🦐 Shrimp${colors.reset} is a scripting language in a shell.
 
@@ -112,7 +76,7 @@ async function main() {
       console.log(`${colors.bright}usage: shrimp bytecode <file>${colors.reset}`)
       process.exit(1)
     }
-    console.log(await compileFile(file))
+    console.log(bytecodeToString(compileFile(file)))
     return
   }
 
@@ -122,7 +86,8 @@ async function main() {
       console.log(`${colors.bright}usage: shrimp parse <file>${colors.reset}`)
       process.exit(1)
     }
-    console.log(await parseFile(file))
+    const input = readFileSync(file, 'utf-8')
+    console.log(treeToString(parseCode(input), input))
     return
   }
 

bun.lock

@@ -44,7 +44,7 @@
 
     "@marijn/find-cluster-break": ["@marijn/find-cluster-break@1.0.2", "", {}, "sha512-l0h88YhZFyKdXIFNfSWpyjStDjGHwZ/U7iobcK1cQQD8sejsONdQtTVU+1wVN1PBw40PiiHB1vA5S7VTfQiP9g=="],
 
-    "@types/bun": ["@types/bun@1.3.1", "", { "dependencies": { "bun-types": "1.3.1" } }, "sha512-4jNMk2/K9YJtfqwoAa28c8wK+T7nvJFOjxI4h/7sORWcypRNxBpr+TPNaCfVWq70tLCJsqoFwcf0oI0JU/fvMQ=="],
+    "@types/bun": ["@types/bun@1.3.2", "", { "dependencies": { "bun-types": "1.3.2" } }, "sha512-t15P7k5UIgHKkxwnMNkJbWlh/617rkDGEdSsDbu+qNHTaz9SKf7aC8fiIlUdD5RPpH6GEkP0cK7WlvmrEBRtWg=="],
 
     "@types/node": ["@types/node@24.10.0", "", { "dependencies": { "undici-types": "~7.16.0" } }, "sha512-qzQZRBqkFsYyaSWXuEHc2WR9c0a0CXwiE5FWUvn7ZM+vdy1uZLfCunD38UzhuB7YN/J11ndbDBcTmOdxJo9Q7A=="],
 
@@ -52,7 +52,7 @@
 
     "bun-plugin-tailwind": ["bun-plugin-tailwind@0.0.15", "", { "peerDependencies": { "typescript": "^5.0.0" } }, "sha512-qtAXMNGG4R0UGGI8zWrqm2B7BdXqx48vunJXBPzfDOHPA5WkRUZdTSbE7TFwO4jLhYqSE23YMWsM9NhE6ovobw=="],
 
-    "bun-types": ["bun-types@1.3.1", "", { "dependencies": { "@types/node": "*" }, "peerDependencies": { "@types/react": "^19" } }, "sha512-NMrcy7smratanWJ2mMXdpatalovtxVggkj11bScuWuiOoXTiKIu2eVS1/7qbyI/4yHedtsn175n4Sm4JcdHLXw=="],
+    "bun-types": ["bun-types@1.3.2", "", { "dependencies": { "@types/node": "*" }, "peerDependencies": { "@types/react": "^19" } }, "sha512-i/Gln4tbzKNuxP70OWhJRZz1MRfvqExowP7U6JKoI8cntFrtxg7RJK3jvz7wQW54UuvNC8tbKHHri5fy74FVqg=="],
 
     "codemirror": ["codemirror@6.0.2", "", { "dependencies": { "@codemirror/autocomplete": "^6.0.0", "@codemirror/commands": "^6.0.0", "@codemirror/language": "^6.0.0", "@codemirror/lint": "^6.0.0", "@codemirror/search": "^6.0.0", "@codemirror/state": "^6.0.0", "@codemirror/view": "^6.0.0" } }, "sha512-VhydHotNW5w1UGK0Qj96BwSk/Zqbp9WbnyK2W/eVMv4QyF41INRGpjUhFJY7/uDNuudSc33a/PKr4iDqRduvHw=="],
 
@@ -62,11 +62,11 @@
 
     "hono": ["hono@4.10.4", "", {}, "sha512-YG/fo7zlU3KwrBL5vDpWKisLYiM+nVstBQqfr7gCPbSYURnNEP9BDxEMz8KfsDR9JX0lJWDRNc6nXX31v7ZEyg=="],
 
-    "reefvm": ["reefvm@git+https://git.nose.space/defunkt/reefvm#bffb83a5280a4d74e424c4e0f4fbd46f790227a3", { "peerDependencies": { "typescript": "^5" } }, "bffb83a5280a4d74e424c4e0f4fbd46f790227a3"],
+    "reefvm": ["reefvm@git+https://git.nose.space/defunkt/reefvm#d7a971db24aea5ddcaae2c18ce9f10dab793db19", { "peerDependencies": { "typescript": "^5" } }, "d7a971db24aea5ddcaae2c18ce9f10dab793db19"],
 
     "style-mod": ["style-mod@4.1.3", "", {}, "sha512-i/n8VsZydrugj3Iuzll8+x/00GH2vnYsk1eomD8QiRrSAeW6ItbCQDtfXCeJHd0iwiNagqjQkvpvREEPtW3IoQ=="],
 
-    "tailwindcss": ["tailwindcss@4.1.16", "", {}, "sha512-pONL5awpaQX4LN5eiv7moSiSPd/DLDzKVRJz8Q9PgzmAdd1R4307GQS2ZpfiN7ZmekdQrfhZZiSE5jkLR4WNaA=="],
+    "tailwindcss": ["tailwindcss@4.1.17", "", {}, "sha512-j9Ee2YjuQqYT9bbRTfTZht9W/ytp5H+jJpZKiYdP/bpnXARAuELt9ofP0lPnmHjbga7SNQIxdTAXCmtKVYjN+Q=="],
 
     "typescript": ["typescript@5.9.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw=="],
 

src/compiler/compiler.ts

@@ -58,9 +58,9 @@ export class Compiler {
   bytecode: Bytecode
   pipeCounter = 0
 
-  constructor(public input: string, globals?: string[]) {
+  constructor(public input: string, globals?: string[] | Record<string, any>) {
     try {
-      if (globals) setGlobals(globals)
+      if (globals) setGlobals(Array.isArray(globals) ? globals : Object.keys(globals))
       const cst = parser.parse(input)
       const errors = checkTreeForErrors(cst)
 

src/index.ts

@@ -1,11 +1,17 @@
 import { readFileSync } from 'fs'
-import { VM, fromValue, type Bytecode } from 'reefvm'
+import { VM, fromValue, toValue, isValue, type Bytecode } from 'reefvm'
+import { type Tree } from '@lezer/common'
 import { Compiler } from '#compiler/compiler'
-import { globals as shrimpGlobals, colors } from '#prelude'
+import { parser } from '#parser/shrimp'
+import { globals as parserGlobals, setGlobals as setParserGlobals } from '#parser/tokenizer'
+import { globals as shrimpGlobals } from '#prelude'
 
 export { Compiler } from '#compiler/compiler'
 export { parser } from '#parser/shrimp'
-export { globals } from '#prelude'
+export { globals as prelude } from '#prelude'
+export type { Tree } from '@lezer/common'
+export { type Value, type Bytecode } from 'reefvm'
+export { toValue, fromValue, isValue, Scope, VM, bytecodeToString } from 'reefvm'
 
 export class Shrimp {
     vm: VM
@@ -17,6 +23,32 @@ export class Shrimp {
         this.globals = globals
     }
 
+    get(name: string): any {
+        const value = this.vm.scope.get(name)
+        return value ? fromValue(value, this.vm) : null
+    }
+
+    set(name: string, value: any) {
+        this.vm.scope.set(name, toValue(value, this.vm))
+    }
+
+    has(name: string): boolean {
+        return this.vm.scope.has(name)
+    }
+
+    async call(name: string, ...args: any[]): Promise<any> {
+        const result = await this.vm.call(name, ...args)
+        return isValue(result) ? fromValue(result, this.vm) : result
+    }
+
+    parse(code: string): Tree {
+        return parseCode(code, this.globals)
+    }
+
+    compile(code: string): Bytecode {
+        return compileCode(code, this.globals)
+    }
+
     async run(code: string | Bytecode, locals?: Record<string, any>): Promise<any> {
         let bytecode
 
@@ -32,13 +64,9 @@ export class Shrimp {
         await this.vm.continue()
         if (locals) this.vm.popScope()
 
-        return this.vm.stack.length ? fromValue(this.vm.stack.at(-1)!) : null
+        return this.vm.stack.length ? fromValue(this.vm.stack.at(-1)!, this.vm) : null
     }
 
-    get(name: string): any {
-        const value = this.vm.scope.get(name)
-        return value ? fromValue(value) : null
-    }
 }
 
 export async function runFile(path: string, globals?: Record<string, any>): Promise<any> {
@@ -51,14 +79,9 @@ export async function runCode(code: string, globals?: Record<string, any>): Prom
 }
 
 export async function runBytecode(bytecode: Bytecode, globals?: Record<string, any>): Promise<any> {
-    try {
+    const vm = new VM(bytecode, Object.assign({}, shrimpGlobals, globals))
-        const vm = new VM(bytecode, Object.assign({}, shrimpGlobals, globals))
+    await vm.run()
-        await vm.run()
+    return vm.stack.length ? fromValue(vm.stack[vm.stack.length - 1]!, vm) : null
-        return vm.stack.length ? fromValue(vm.stack[vm.stack.length - 1]!) : null
-    } catch (error: any) {
-        console.error(`${colors.red}Error:${colors.reset} ${error.message}`)
-        process.exit(1)
-    }
 }
 
 export function compileFile(path: string, globals?: Record<string, any>): Bytecode {
@@ -71,3 +94,19 @@ export function compileCode(code: string, globals?: Record<string, any>): Byteco
     const compiler = new Compiler(code, globalNames)
     return compiler.bytecode
 }
+
+export function parseFile(path: string, globals?: Record<string, any>): Tree {
+    const code = readFileSync(path, 'utf-8')
+    return parseCode(code, globals)
+}
+
+export function parseCode(code: string, globals?: Record<string, any>): Tree {
+    const oldGlobals = [...parserGlobals]
+    const globalNames = [...Object.keys(shrimpGlobals), ...(globals ? Object.keys(globals) : [])]
+
+    setParserGlobals(globalNames)
+    const result = parser.parse(code)
+    setParserGlobals(oldGlobals)
+
+    return result
+}

src/parser/shrimp.grammar

@@ -12,13 +12,13 @@
   @precedence { Number Regex }
 
   StringFragment { !['\\$]+ }
-  NamedArgPrefix { $[a-z-]+ "=" }
+  NamedArgPrefix { $[a-z] $[a-z0-9-]* "=" }
   Number { ("-" | "+")? $[0-9]+ ("_"? $[0-9]+)* ('.' $[0-9]+ ("_"? $[0-9]+)*)? }
   Boolean { "true" | "false" }
   newlineOrSemicolon { "\n" | ";" }
   eof { @eof }
   space { " " | "\t" }
-  Comment { "#" " " ![\n]* }
+  Comment { "#" ![\n]* }
   leftParen { "(" }
   rightParen { ")" }
   colon[closedBy="end", @name="colon"] { ":" }
@@ -47,7 +47,8 @@ null { @specialize[@name=Null]<Identifier, "null"> }
   comparison @left,
   multiplicative @left,
   additive @left,
-  call
+  call,
+  functionWithNewlines
 }
 
 item {
@@ -188,7 +189,21 @@ BinOp {
 }
 
 ParenExpr {
-  leftParen (IfExpr | ambiguousFunctionCall | BinOp | expressionWithoutIdentifier | ConditionalOp | PipeExpr | FunctionDef) rightParen
+  leftParen newlineOrSemicolon* (
+    FunctionCallWithNewlines |
+    IfExpr |
+    ambiguousFunctionCall |
+    BinOp newlineOrSemicolon* |
+    expressionWithoutIdentifier |
+    ConditionalOp newlineOrSemicolon* |
+    PipeExpr |
+    FunctionDef
+  )
+  rightParen
+}
+
+FunctionCallWithNewlines[@name=FunctionCall] {
+  (DotGet | Identifier | ParenExpr) newlineOrSemicolon+ arg !functionWithNewlines (newlineOrSemicolon+ arg)* newlineOrSemicolon*
 }
 
 expression {

src/parser/shrimp.terms.ts

@@ -28,39 +28,40 @@ export const
   Program = 26,
   PipeExpr = 27,
   WhileExpr = 29,
-  keyword = 70,
+  keyword = 71,
   ConditionalOp = 31,
   ParenExpr = 32,
-  IfExpr = 33,
+  FunctionCallWithNewlines = 33,
-  FunctionCall = 35,
+  DotGet = 34,
-  DotGet = 36,
+  Number = 35,
-  Number = 37,
+  PositionalArg = 36,
-  PositionalArg = 38,
+  FunctionDef = 37,
-  FunctionDef = 39,
+  Params = 38,
-  Params = 40,
+  NamedParam = 39,
-  NamedParam = 41,
+  NamedArgPrefix = 40,
-  NamedArgPrefix = 42,
+  String = 41,
-  String = 43,
+  StringFragment = 42,
-  StringFragment = 44,
+  Interpolation = 43,
-  Interpolation = 45,
+  EscapeSeq = 44,
-  EscapeSeq = 46,
+  Boolean = 45,
-  Boolean = 47,
+  Null = 46,
-  Null = 48,
+  colon = 47,
-  colon = 49,
+  CatchExpr = 48,
-  CatchExpr = 50,
+  Block = 50,
-  Block = 52,
+  FinallyExpr = 51,
-  FinallyExpr = 53,
+  Underscore = 54,
-  Underscore = 56,
+  NamedArg = 55,
-  NamedArg = 57,
+  IfExpr = 56,
-  ElseIfExpr = 58,
+  FunctionCall = 58,
-  ElseExpr = 60,
+  ElseIfExpr = 59,
-  FunctionCallOrIdentifier = 61,
+  ElseExpr = 61,
-  BinOp = 62,
+  FunctionCallOrIdentifier = 62,
-  Regex = 63,
+  BinOp = 63,
-  Dict = 64,
+  Regex = 64,
-  Array = 65,
+  Dict = 65,
-  FunctionCallWithBlock = 66,
+  Array = 66,
-  TryExpr = 67,
+  FunctionCallWithBlock = 67,
-  Throw = 69,
+  TryExpr = 68,
-  CompoundAssign = 71,
+  Throw = 70,
-  Assign = 72
+  CompoundAssign = 72,
+  Assign = 73

src/parser/shrimp.ts

@@ -4,24 +4,24 @@ import {operatorTokenizer} from "./operatorTokenizer"
 import {tokenizer, specializeKeyword} from "./tokenizer"
 import {trackScope} from "./parserScopeContext"
 import {highlighting} from "./highlight"
-const spec_Identifier = {__proto__:null,while:60, if:68, null:96, catch:102, finally:108, end:110, else:118, try:136, throw:140}
+const spec_Identifier = {__proto__:null,while:60, null:92, catch:98, finally:104, end:106, if:114, else:120, try:138, throw:142}
 export const parser = LRParser.deserialize({
   version: 14,
-  states: "9UQYQbOOO!dOpO'#DQO!iOSO'#DXO$_QcO'#DkO&rQcO'#EYOOQ`'#Eh'#EhO'uQRO'#DlO)[QcO'#EWO)lQbO'#C|OOQa'#Dn'#DnO+nQbO'#DoOOQa'#EY'#EYO+uQcO'#EYO+|QcO'#EXO,yQcO'#EWO-TQRO'#DuOOQ`'#EW'#EWO-iQbO'#EWO-pQQO'#EVOOQ`'#EV'#EVOOQ`'#Dw'#DwQYQbOOO-{QbO'#DTO.WQbO'#C}O.{QbO'#CyO/pQQO'#DqO.{QbO'#DsO/uObO,59lO0QQbO'#DZO0YQWO'#D[OOOO'#E`'#E`OOOO'#D|'#D|O0nOSO,59sOOQa,59s,59sOOQ`'#DS'#DSO0|QbO'#DgOOQ`'#E^'#E^OOQ`'#Dy'#DyO1WQbO,59kOOQa'#EX'#EXO.{QbO,5:WO.{QbO,5:WO.{QbO,5:WO.{QbO,59gO.{QbO,59gO.{QbO,59gO2QQRO,59hO2^QQO,59hO2fQQO,59hO2qQRO,59hO3[QRO,59hO3jQQO'#CwOOQ`'#EP'#EPO3oQbO,5:ZO3vQQO,5:YOOQa,5:Z,5:ZO4RQbO,5:ZO)lQbO,5:bO)lQbO,5:aO4]QbO,5:[O4dQbO,59cOOQ`,5:q,5:qO)lQbO'#DxOOQ`-E7u-E7uOOQ`'#Dz'#DzO5OQbO'#DUO5ZQbO'#DVOOQO'#D{'#D{O5RQQO'#DUO5iQQO,59oO5nQcO'#EXO5uQRO'#E[O6lQRO'#E[OOQO'#E['#E[O6sQQO,59iO6xQRO,59eO7PQRO,59eO4]QbO,5:]O7[QcO,5:_O8dQcO,5:_O8tQcO,5:_OOQa1G/W1G/WOOOO,59u,59uOOOO,59v,59vOOOO-E7z-E7zOOQa1G/_1G/_OOQ`,5:R,5:ROOQ`-E7w-E7wOOQa1G/r1G/rO9sQcO1G/rO9}QcO1G/rO:XQcO1G/rOOQa1G/R1G/RO<TQcO1G/RO<[QcO1G/RO<cQcO1G/ROOQa1G/S1G/SOOQ`-E7}-E7}O<jQQO1G/tOOQa1G/u1G/uO<uQbO1G/uOOQO'#EQ'#EQO<jQQO1G/tOOQa1G/t1G/tOOQ`'#ER'#ERO<uQbO1G/uO=PQbO1G/|O=kQbO1G/{O>VQbO'#DbO>hQbO'#DbO>{QbO1G/vOOQ`-E7v-E7vOOQ`,5:d,5:dOOQ`-E7x-E7xO?WQQO,59pOOQO,59q,59qOOQO-E7y-E7yO?`QbO1G/ZO4]QbO1G/TO4]QbO1G/PO?gQbO1G/wO?rQQO7+%`OOQa7+%`7+%`O?}QbO7+%aOOQa7+%a7+%aOOQO-E8O-E8OOOQ`-E8P-E8POOQ`'#D}'#D}O@XQQO'#D}O@aQbO'#EgOOQ`,59|,59|O@tQbO'#D`O@yQQO'#DcOOQ`7+%b7+%bOAOQbO7+%bOATQbO7+%bOA]QbO7+$uOAkQbO7+$uOA{QbO7+$oOBTQbO7+$kOOQ`7+%c7+%cOBYQbO7+%cOB_QbO7+%cOOQa<<Hz<<HzOOQa<<H{<<H{OOQ`,5:i,5:iOOQ`-E7{-E7{OBgQQO,59zO4]QbO,59}OOQ`<<H|<<H|OBlQbO<<H|OOQ`<<Ha<<HaOBqQbO<<HaOBvQbO<<HaOCOQbO<<HaOOQ`'#EO'#EOOCZQbO<<HZOCcQbO'#DjOOQ`<<HZ<<HZOCkQbO<<HZOOQ`<<HV<<HVOOQ`<<H}<<H}OCpQbO<<H}O4]QbO1G/fOOQ`1G/i1G/iOOQ`AN>hAN>hOOQ`AN={AN={OCuQbOAN={OCzQbOAN={OOQ`-E7|-E7|OOQ`AN=uAN=uODSQbOAN=uO.WQbO,5:SO4]QbO,5:UOOQ`AN>iAN>iOOQ`7+%Q7+%QOOQ`G23gG23gODXQbOG23gPD^QbO'#DhOOQ`G23aG23aODcQQO1G/nOOQ`1G/p1G/pOOQ`LD)RLD)RO4]QbO7+%YOOQ`<<Ht<<Ht",
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-  repeatNodeCount: 11,
+  repeatNodeCount: 12,
-  tokenData: "DY~R|OX#{XY$jYZ%TZp#{pq$jqs#{st%ntu'tuw#{wx'yxy(Oyz(iz{#{{|)S|}#{}!O,S!O!P#{!P!Q.i!Q![)q![!]7U!]!^%T!^!}#{!}#O7o#O#P9e#P#Q9j#Q#R#{#R#S:T#S#T#{#T#Y-T#Y#Z:n#Z#b-T#b#c?l#c#f-T#f#g@i#g#h-T#h#iAf#i#o-T#o#p#{#p#qCj#q;'S#{;'S;=`$d<%l~#{~O#{~~DTS$QU|SOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{S$gP;=`<%l#{^$qU|S!xYOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U%[U|S#YQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{^%sW|SOp#{pq&]qt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{^&dZiY|SOY&]YZ#{Zt&]tu'Vuw&]wx'Vx#O&]#O#P'V#P;'S&];'S;=`'n<%lO&]Y'[SiYOY'VZ;'S'V;'S;=`'h<%lO'VY'kP;=`<%l'V^'qP;=`<%l&]~'yO#T~~(OO#R~U(VU|S!}QOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U(pU|S#]QOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U)XW|SOt#{uw#{x!Q#{!Q![)q![#O#{#P;'S#{;'S;=`$d<%lO#{U)x[|SuQOt#{uw#{x!O#{!O!P*n!P!Q#{!Q![)q![#O#{#P#R#{#R#S)S#S;'S#{;'S;=`$d<%lO#{U*sW|SOt#{uw#{x!Q#{!Q![+]![#O#{#P;'S#{;'S;=`$d<%lO#{U+dY|SuQOt#{uw#{x!Q#{!Q![+]![#O#{#P#R#{#R#S*n#S;'S#{;'S;=`$d<%lO#{U,X^|SOt#{uw#{x}#{}!O-T!O!Q#{!Q![)q![!_#{!_!`.O!`#O#{#P#T#{#T#o-T#o;'S#{;'S;=`$d<%lO#{U-Y[|SOt#{uw#{x}#{}!O-T!O!_#{!_!`.O!`#O#{#P#T#{#T#o-T#o;'S#{;'S;=`$d<%lO#{U.VUzQ|SOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U.nW|SOt#{uw#{x!P#{!P!Q/W!Q#O#{#P;'S#{;'S;=`$d<%lO#{U/]^|SOY0XYZ#{Zt0Xtu1[uw0Xwx1[x!P0X!P!Q#{!Q!}0X!}#O5}#O#P3j#P;'S0X;'S;=`7O<%lO0XU0`^|S!aQOY0XYZ#{Zt0Xtu1[uw0Xwx1[x!P0X!P!Q4P!Q!}0X!}#O5}#O#P3j#P;'S0X;'S;=`7O<%lO0XQ1aX!aQOY1[Z!P1[!P!Q1|!Q!}1[!}#O2k#O#P3j#P;'S1[;'S;=`3y<%lO1[Q2PP!P!Q2SQ2XU!aQ#Z#[2S#]#^2S#a#b2S#g#h2S#i#j2S#m#n2SQ2nVOY2kZ#O2k#O#P3T#P#Q1[#Q;'S2k;'S;=`3d<%lO2kQ3WSOY2kZ;'S2k;'S;=`3d<%lO2kQ3gP;=`<%l2kQ3mSOY1[Z;'S1[;'S;=`3y<%lO1[Q3|P;=`<%l1[U4UW|SOt#{uw#{x!P#{!P!Q4n!Q#O#{#P;'S#{;'S;=`$d<%lO#{U4ub|S!aQOt#{uw#{x#O#{#P#Z#{#Z#[4n#[#]#{#]#^4n#^#a#{#a#b4n#b#g#{#g#h4n#h#i#{#i#j4n#j#m#{#m#n4n#n;'S#{;'S;=`$d<%lO#{U6S[|SOY5}YZ#{Zt5}tu2kuw5}wx2kx#O5}#O#P3T#P#Q0X#Q;'S5};'S;=`6x<%lO5}U6{P;=`<%l5}U7RP;=`<%l0XU7]U|S!RQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U7vW#_Q|SOt#{uw#{x!_#{!_!`8`!`#O#{#P;'S#{;'S;=`$d<%lO#{U8eV|SOt#{uw#{x#O#{#P#Q8z#Q;'S#{;'S;=`$d<%lO#{U9RU#^Q|SOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{~9jO#U~U9qU#`Q|SOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U:[U|S!YQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U:s]|SOt#{uw#{x}#{}!O-T!O!_#{!_!`.O!`#O#{#P#T#{#T#U;l#U#o-T#o;'S#{;'S;=`$d<%lO#{U;q^|SOt#{uw#{x}#{}!O-T!O!_#{!_!`.O!`#O#{#P#T#{#T#`-T#`#a<m#a#o-T#o;'S#{;'S;=`$d<%lO#{U<r^|SOt#{uw#{x}#{}!O-T!O!_#{!_!`.O!`#O#{#P#T#{#T#g-T#g#h=n#h#o-T#o;'S#{;'S;=`$d<%lO#{U=s^|SOt#{uw#{x}#{}!O-T!O!_#{!_!`.O!`#O#{#P#T#{#T#X-T#X#Y>o#Y#o-T#o;'S#{;'S;=`$d<%lO#{U>v[!PQ|SOt#{uw#{x}#{}!O-T!O!_#{!_!`.O!`#O#{#P#T#{#T#o-T#o;'S#{;'S;=`$d<%lO#{^?s[#VW|SOt#{uw#{x}#{}!O-T!O!_#{!_!`.O!`#O#{#P#T#{#T#o-T#o;'S#{;'S;=`$d<%lO#{^@p[#XW|SOt#{uw#{x}#{}!O-T!O!_#{!_!`.O!`#O#{#P#T#{#T#o-T#o;'S#{;'S;=`$d<%lO#{^Am^#WW|SOt#{uw#{x}#{}!O-T!O!_#{!_!`.O!`#O#{#P#T#{#T#f-T#f#gBi#g#o-T#o;'S#{;'S;=`$d<%lO#{UBn^|SOt#{uw#{x}#{}!O-T!O!_#{!_!`.O!`#O#{#P#T#{#T#i-T#i#j=n#j#o-T#o;'S#{;'S;=`$d<%lO#{UCqUlQ|SOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{~DYO#a~",
+  tokenData: "Cx~R|OX#{XY$jYZ%TZp#{pq$jqs#{st%ntu'Vuw#{wx'[xy'ayz'zz{#{{|(e|}#{}!O(e!O!P#{!P!Q+e!Q![)S![!]4Q!]!^%T!^!}#{!}#O4k#O#P6a#P#Q6f#Q#R#{#R#S7P#S#T#{#T#Y7j#Y#Z9U#Z#b7j#b#c>r#c#f7j#f#g?u#g#h7j#h#i@x#i#o7j#o#p#{#p#qCY#q;'S#{;'S;=`$d<%l~#{~O#{~~CsS$QUzSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{S$gP;=`<%l#{^$qUzS!zYOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U%[UzS#QQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{^%uZiYzSOY%nYZ#{Zt%ntu&huw%nwx&hx#O%n#O#P&h#P;'S%n;'S;=`'P<%lO%nY&mSiYOY&hZ;'S&h;'S;=`&y<%lO&hY&|P;=`<%l&h^'SP;=`<%l%n~'[O#V~~'aO#T~U'hUzS#PQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U(RUzS#_QOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U(jWzSOt#{uw#{x!Q#{!Q![)S![#O#{#P;'S#{;'S;=`$d<%lO#{U)Z[zSsQOt#{uw#{x!O#{!O!P*P!P!Q#{!Q![)S![#O#{#P#R#{#R#S(e#S;'S#{;'S;=`$d<%lO#{U*UWzSOt#{uw#{x!Q#{!Q![*n![#O#{#P;'S#{;'S;=`$d<%lO#{U*uYzSsQOt#{uw#{x!Q#{!Q![*n![#O#{#P#R#{#R#S*P#S;'S#{;'S;=`$d<%lO#{U+jWzSOt#{uw#{x!P#{!P!Q,S!Q#O#{#P;'S#{;'S;=`$d<%lO#{U,X^zSOY-TYZ#{Zt-Ttu.Wuw-Twx.Wx!P-T!P!Q#{!Q!}-T!}#O2y#O#P0f#P;'S-T;'S;=`3z<%lO-TU-[^zS!bQOY-TYZ#{Zt-Ttu.Wuw-Twx.Wx!P-T!P!Q0{!Q!}-T!}#O2y#O#P0f#P;'S-T;'S;=`3z<%lO-TQ.]X!bQOY.WZ!P.W!P!Q.x!Q!}.W!}#O/g#O#P0f#P;'S.W;'S;=`0u<%lO.WQ.{P!P!Q/OQ/TU!bQ#Z#[/O#]#^/O#a#b/O#g#h/O#i#j/O#m#n/OQ/jVOY/gZ#O/g#O#P0P#P#Q.W#Q;'S/g;'S;=`0`<%lO/gQ0SSOY/gZ;'S/g;'S;=`0`<%lO/gQ0cP;=`<%l/gQ0iSOY.WZ;'S.W;'S;=`0u<%lO.WQ0xP;=`<%l.WU1QWzSOt#{uw#{x!P#{!P!Q1j!Q#O#{#P;'S#{;'S;=`$d<%lO#{U1qbzS!bQOt#{uw#{x#O#{#P#Z#{#Z#[1j#[#]#{#]#^1j#^#a#{#a#b1j#b#g#{#g#h1j#h#i#{#i#j1j#j#m#{#m#n1j#n;'S#{;'S;=`$d<%lO#{U3O[zSOY2yYZ#{Zt2ytu/guw2ywx/gx#O2y#O#P0P#P#Q-T#Q;'S2y;'S;=`3t<%lO2yU3wP;=`<%l2yU3}P;=`<%l-TU4XUzS!PQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U4rW#aQzSOt#{uw#{x!_#{!_!`5[!`#O#{#P;'S#{;'S;=`$d<%lO#{U5aVzSOt#{uw#{x#O#{#P#Q5v#Q;'S#{;'S;=`$d<%lO#{U5}U#`QzSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{~6fO#W~U6mU#bQzSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U7WUzS!WQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U7o^zSOt#{uw#{x}#{}!O7j!O!Q#{!Q![7j![!_#{!_!`8k!`#O#{#P#T#{#T#o7j#o;'S#{;'S;=`$d<%lO#{U8rUxQzSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U9Z_zSOt#{uw#{x}#{}!O7j!O!Q#{!Q![7j![!_#{!_!`8k!`#O#{#P#T#{#T#U:Y#U#o7j#o;'S#{;'S;=`$d<%lO#{U:_`zSOt#{uw#{x}#{}!O7j!O!Q#{!Q![7j![!_#{!_!`8k!`#O#{#P#T#{#T#`7j#`#a;a#a#o7j#o;'S#{;'S;=`$d<%lO#{U;f`zSOt#{uw#{x}#{}!O7j!O!Q#{!Q![7j![!_#{!_!`8k!`#O#{#P#T#{#T#g7j#g#h<h#h#o7j#o;'S#{;'S;=`$d<%lO#{U<m`zSOt#{uw#{x}#{}!O7j!O!Q#{!Q![7j![!_#{!_!`8k!`#O#{#P#T#{#T#X7j#X#Y=o#Y#o7j#o;'S#{;'S;=`$d<%lO#{U=v^}QzSOt#{uw#{x}#{}!O7j!O!Q#{!Q![7j![!_#{!_!`8k!`#O#{#P#T#{#T#o7j#o;'S#{;'S;=`$d<%lO#{^>y^#XWzSOt#{uw#{x}#{}!O7j!O!Q#{!Q![7j![!_#{!_!`8k!`#O#{#P#T#{#T#o7j#o;'S#{;'S;=`$d<%lO#{^?|^#ZWzSOt#{uw#{x}#{}!O7j!O!Q#{!Q![7j![!_#{!_!`8k!`#O#{#P#T#{#T#o7j#o;'S#{;'S;=`$d<%lO#{^AP`#YWzSOt#{uw#{x}#{}!O7j!O!Q#{!Q![7j![!_#{!_!`8k!`#O#{#P#T#{#T#f7j#f#gBR#g#o7j#o;'S#{;'S;=`$d<%lO#{UBW`zSOt#{uw#{x}#{}!O7j!O!Q#{!Q![7j![!_#{!_!`8k!`#O#{#P#T#{#T#i7j#i#j<h#j#o7j#o;'S#{;'S;=`$d<%lO#{UCaUlQzSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{~CxO#c~",
-  tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO#P~~", 11)],
+  tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO#R~~", 11)],
   topRules: {"Program":[0,26]},
   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: 1634
+  tokenPrec: 1922
 })

src/parser/tests/basics.test.ts

@@ -368,6 +368,78 @@ describe('Parentheses', () => {
             PositionalArg
               Number 3`)
   })
+
+  test('function call with named args on multiple lines in parens', () => {
+    expect(`(tail 
+      arg1=true 
+      arg2=30
+    )`).toMatchTree(`
+      ParenExpr
+        FunctionCall
+          Identifier tail
+          NamedArg
+            NamedArgPrefix arg1=
+            Boolean true
+          NamedArg
+            NamedArgPrefix arg2=
+            Number 30
+          `)
+
+    expect(`(
+      tail 
+        arg1=true 
+        arg2=30
+    )`).toMatchTree(`
+      ParenExpr
+        FunctionCall
+          Identifier tail
+          NamedArg
+            NamedArgPrefix arg1=
+            Boolean true
+          NamedArg
+            NamedArgPrefix arg2=
+            Number 30
+          `)
+  })
+
+  test('binop with newlines in parens', () => {
+    expect(`(
+  1 + 2
+)`).toMatchTree(`
+      ParenExpr
+        BinOp
+          Number 1
+          Plus +
+          Number 2`)
+  })
+
+  test('comparison with newlines in parens', () => {
+    expect(`(
+  1 < 2
+)`).toMatchTree(`
+      ParenExpr
+        ConditionalOp
+          Number 1
+          Lt <
+          Number 2`)
+  })
+
+  test('function call with multiple identifiers on separate lines in parens', () => {
+    expect(`(echo 
+  arg1
+  arg2
+  arg3
+)`).toMatchTree(`
+    ParenExpr
+      FunctionCall
+        Identifier echo
+        PositionalArg
+          Identifier arg1
+        PositionalArg
+          Identifier arg2
+        PositionalArg
+          Identifier arg3`)
+  })
 })
 
 describe('Number literals', () => {
@@ -679,7 +751,7 @@ describe('Comments', () => {
   test('are greedy', () => {
     expect(`
 x = 5 # one banana
-y = 2 # two bananas`).toMatchTree(`
+y = 2 #two bananas`).toMatchTree(`
       Assign
         AssignableIdentifier x
         Eq =
@@ -689,7 +761,7 @@ y = 2 # two bananas`).toMatchTree(`
         AssignableIdentifier y
         Eq =
         Number 2
-      Comment # two bananas`)
+      Comment #two bananas`)
 
     expect(`
 # some comment
@@ -710,11 +782,11 @@ basename = 5 # very astute
   })
 
   test('words with # are not considered comments', () => {
-    expect('find #hashtag-file.txt').toMatchTree(`
+    expect('find my#hashtag-file.txt').toMatchTree(`
       FunctionCall
         Identifier find
         PositionalArg
-          Word #hashtag-file.txt`)
+          Word my#hashtag-file.txt`)
   })
 
   test('hastags in strings are not comments', () => {

src/parser/tokenizer.ts

@@ -8,9 +8,9 @@ export function specializeKeyword(ident: string) {
 
 // tell the dotGet searcher about builtin globals
 export const globals: string[] = []
-export const setGlobals = (newGlobals: string[]) => {
+export const setGlobals = (newGlobals: string[] | Record<string, any>) => {
   globals.length = 0
-  globals.push(...newGlobals)
+  globals.push(...(Array.isArray(newGlobals) ? newGlobals : Object.keys(newGlobals)))
 }
 
 // The only chars that can't be words are whitespace, apostrophes, closing parens, and EOF.

src/prelude/index.ts

@@ -6,6 +6,7 @@ import {
 } from 'reefvm'
 
 import { dict } from './dict'
+import { json } from './json'
 import { load } from './load'
 import { list } from './list'
 import { math } from './math'
@@ -13,6 +14,7 @@ import { str } from './str'
 
 export const globals = {
   dict,
+  json,
   load,
   list,
   math,
@@ -41,6 +43,10 @@ export const globals = {
     return typeof v !== 'string' || this.scope.has(v)
   },
 
+  // env
+  args: Bun.argv.slice(1),
+  exit: (num: number) => process.exit(num ?? 0),
+
   // type predicates
   'string?': (v: any) => toValue(v).type === 'string',
   'number?': (v: any) => toValue(v).type === 'number',

src/prelude/json.ts

@@ -0,0 +1,7 @@
+export const json = {
+  encode: (s: any) => JSON.stringify(s),
+  decode: (s: string) => JSON.parse(s),
+}
+
+  ; (json as any).parse = json.decode
+  ; (json as any).stringify = json.encode

src/prelude/list.ts

@@ -14,6 +14,13 @@ export const list = {
     }
     return acc
   },
+  reject: async (list: any[], cb: Function) => {
+    let acc: any[] = []
+    for (const value of list) {
+      if (!(await cb(value))) acc.push(value)
+    }
+    return acc
+  },
   reduce: async (list: any[], cb: Function, initial: any) => {
     let acc = initial
     for (const value of list) acc = await cb(acc, value)
@@ -66,6 +73,13 @@ export const list = {
     const realItems = items.map(item => item.value)
     return toValue(realList.splice(realStart, realDeleteCount, ...realItems))
   },
+  insert: (list: Value, index: Value, item: Value) => {
+    if (list.type !== 'array') return toNull()
+    const realList = list.value as any[]
+    const realIndex = index.value as number
+    realList.splice(realIndex, 0, item)
+    return toValue(realList.length)
+  },
 
   // sequence operations
   reverse: (list: any[]) => list.slice().reverse(),
@@ -136,3 +150,4 @@ export const list = {
   ; (list.pop as any).raw = true
   ; (list.shift as any).raw = true
   ; (list.unshift as any).raw = true
+  ; (list.insert as any).raw = true

src/prelude/tests/info.test.ts

@@ -77,3 +77,17 @@ describe('introspection', () => {
     await expect(`describe 'hello'`).toEvaluateTo("#<string: \u001b[32m'hello\u001b[32m'\u001b[0m>", globals)
   })
 })
+
+describe('environment', () => {
+  test('args is an array', async () => {
+    await expect(`array? args`).toEvaluateTo(true, globals)
+  })
+
+  test('args can be accessed', async () => {
+    await expect(`type args`).toEvaluateTo('array', globals)
+  })
+
+  test('', async () => {
+    await expect(`list.first args | str.ends-with? 'shrimp.test.ts'`).toEvaluateTo(true)
+  })
+})

src/prelude/tests/json.test.ts

@@ -0,0 +1,84 @@
+import { expect, describe, test } from 'bun:test'
+
+describe('json', () => {
+  test('json.decode', () => {
+    expect(`json.decode '[1,2,3]'`).toEvaluateTo([1, 2, 3])
+    expect(`json.decode '"heya"'`).toEvaluateTo('heya')
+    expect(`json.decode '[true, false, null]'`).toEvaluateTo([true, false, null])
+    expect(`json.decode '{"a": true, "b": false, "c": "yeah"}'`).toEvaluateTo({ a: true, b: false, c: "yeah" })
+  })
+
+  test('json.encode', () => {
+    expect(`json.encode [1 2 3]`).toEvaluateTo('[1,2,3]')
+    expect(`json.encode 'heya'`).toEvaluateTo('"heya"')
+    expect(`json.encode [true false null]`).toEvaluateTo('[true,false,null]')
+    expect(`json.encode [a=true b=false c='yeah'] | json.decode`).toEvaluateTo({ a: true, b: false, c: "yeah" })
+  })
+
+  test('edge cases - empty structures', () => {
+    expect(`json.decode '[]'`).toEvaluateTo([])
+    expect(`json.decode '{}'`).toEvaluateTo({})
+    expect(`json.encode []`).toEvaluateTo('[]')
+    expect(`json.encode [=]`).toEvaluateTo('{}')
+  })
+
+  test('edge cases - special characters in strings', () => {
+    expect(`json.decode '"hello\\\\nworld"'`).toEvaluateTo('hello\nworld')
+    expect(`json.decode '"tab\\\\there"'`).toEvaluateTo('tab\there')
+    expect(`json.decode '"forward/slash"'`).toEvaluateTo('forward/slash')
+    expect(`json.decode '"with\\\\\\\\backslash"'`).toEvaluateTo('with\\backslash')
+  })
+
+  test('numbers - integers and floats', () => {
+    expect(`json.decode '42'`).toEvaluateTo(42)
+    expect(`json.decode '0'`).toEvaluateTo(0)
+    expect(`json.decode '-17'`).toEvaluateTo(-17)
+    expect(`json.decode '3.14159'`).toEvaluateTo(3.14159)
+    expect(`json.decode '-0.5'`).toEvaluateTo(-0.5)
+  })
+
+  test('numbers - scientific notation', () => {
+    expect(`json.decode '1e10'`).toEvaluateTo(1e10)
+    expect(`json.decode '2.5e-3'`).toEvaluateTo(2.5e-3)
+    expect(`json.decode '1.23E+5'`).toEvaluateTo(1.23e5)
+  })
+
+  test('unicode - emoji and special characters', () => {
+    expect(`json.decode '"hello 👋"'`).toEvaluateTo('hello 👋')
+    expect(`json.decode '"🎉🚀✨"'`).toEvaluateTo('🎉🚀✨')
+    expect(`json.encode '你好'`).toEvaluateTo('"你好"')
+    expect(`json.encode 'café'`).toEvaluateTo('"café"')
+  })
+
+  test('nested structures - arrays', () => {
+    expect(`json.decode '[[1,2],[3,4],[5,6]]'`).toEvaluateTo([[1, 2], [3, 4], [5, 6]])
+    expect(`json.decode '[1,[2,[3,[4]]]]'`).toEvaluateTo([1, [2, [3, [4]]]])
+  })
+
+  test('nested structures - objects', () => {
+    expect(`json.decode '{"user":{"name":"Alice","age":30}}'`).toEvaluateTo({
+      user: { name: 'Alice', age: 30 }
+    })
+    expect(`json.decode '{"a":{"b":{"c":"deep"}}}'`).toEvaluateTo({
+      a: { b: { c: 'deep' } }
+    })
+  })
+
+  test('nested structures - mixed arrays and objects', () => {
+    expect(`json.decode '[{"id":1,"tags":["a","b"]},{"id":2,"tags":["c"]}]'`).toEvaluateTo([
+      { id: 1, tags: ['a', 'b'] },
+      { id: 2, tags: ['c'] }
+    ])
+    expect(`json.decode '{"items":[1,2,3],"meta":{"count":3}}'`).toEvaluateTo({
+      items: [1, 2, 3],
+      meta: { count: 3 }
+    })
+  })
+
+  test('error handling - invalid json', () => {
+    expect(`json.decode '{invalid}'`).toFailEvaluation()
+    expect(`json.decode '[1,2,3'`).toFailEvaluation()
+    expect(`json.decode 'undefined'`).toFailEvaluation()
+    expect(`json.decode ''`).toFailEvaluation()
+  })
+})

src/prelude/tests/prelude.test.ts

@@ -66,6 +66,7 @@ describe('string operations', () => {
   test('slice extracts substring', async () => {
     await expect(`str.slice 'hello' 1 3`).toEvaluateTo('el')
     await expect(`str.slice 'hello' 2 null`).toEvaluateTo('llo')
+    await expect(`str.slice 'hello' 2`).toEvaluateTo('llo')
   })
 
   test('repeat repeats string', async () => {
@@ -193,6 +194,15 @@ describe('collections', () => {
     `).toEvaluateTo([3, 4, 5])
   })
 
+  test('list.reject doesnt keep matching elements', async () => {
+    await expect(`
+      is-even = do x:
+        (x % 2) == 0
+      end
+      list.reject [1 2 3 4 5] is-even
+    `).toEvaluateTo([1, 3, 5])
+  })
+
   test('list.reduce accumulates values', async () => {
     await expect(`
       add = do acc x:
@@ -339,6 +349,22 @@ describe('collections', () => {
     await expect(`arr = [1 2 3 4 5]; list.splice arr 3 2; arr`).toEvaluateTo([1, 2, 3])
   })
 
+  test('list.insert adds element at index and mutates array', async () => {
+    await expect(`arr = [1 2 4 5]; list.insert arr 2 3; arr`).toEvaluateTo([1, 2, 3, 4, 5])
+  })
+
+  test('list.insert returns array length', async () => {
+    await expect(`list.insert [1 2 4] 2 3`).toEvaluateTo(4)
+  })
+
+  test('list.insert at start', async () => {
+    await expect(`arr = [2 3]; list.insert arr 0 1; arr`).toEvaluateTo([1, 2, 3])
+  })
+
+  test('list.insert at end', async () => {
+    await expect(`arr = [1 2]; list.insert arr 2 99; arr`).toEvaluateTo([1, 2, 99])
+  })
+
   test('list.sort with no callback sorts ascending', async () => {
     await expect(`list.sort [3 1 4 1 5] null`).toEvaluateTo([1, 1, 3, 4, 5])
   })

src/tests/shrimp.test.ts

@@ -1,6 +1,6 @@
 import { describe } from 'bun:test'
 import { expect, test } from 'bun:test'
-import { Shrimp } from '..'
+import { Shrimp, runCode, compileCode, parseCode, bytecodeToString } from '..'
 
 describe('Shrimp', () => {
   test('allows running Shrimp code', async () => {
@@ -50,4 +50,403 @@ describe('Shrimp', () => {
     await shrimp.run('abc = nothing')
     expect(shrimp.get('abc')).toEqual('nothing')
   })
+
+  describe('set()', () => {
+    test('allows setting variables', async () => {
+      const shrimp = new Shrimp()
+
+      shrimp.set('foo', 42)
+      expect(shrimp.get('foo')).toEqual(42)
+
+      shrimp.set('bar', 'hello')
+      expect(shrimp.get('bar')).toEqual('hello')
+    })
+
+    test('set variables are accessible in code', async () => {
+      const shrimp = new Shrimp()
+
+      shrimp.set('x', 10)
+      shrimp.set('y', 20)
+
+      const result = await shrimp.run('x + y')
+      expect(result).toEqual(30)
+    })
+
+    test('allows setting functions', async () => {
+      const shrimp = new Shrimp()
+
+      shrimp.set('double', (n: number) => n * 2)
+
+      const result = await shrimp.run('double 21')
+      expect(result).toEqual(42)
+    })
+
+    test('overwrites existing variables', async () => {
+      const shrimp = new Shrimp()
+
+      await shrimp.run('x = 100')
+      expect(shrimp.get('x')).toEqual(100)
+
+      shrimp.set('x', 200)
+      expect(shrimp.get('x')).toEqual(200)
+    })
+  })
+
+  describe('has()', () => {
+    test('returns true for existing variables', async () => {
+      const shrimp = new Shrimp()
+
+      await shrimp.run('x = 5')
+      expect(shrimp.has('x')).toEqual(true)
+    })
+
+    test('returns false for non-existing variables', () => {
+      const shrimp = new Shrimp()
+
+      expect(shrimp.has('nonexistent')).toEqual(false)
+    })
+
+    test('returns true for globals', () => {
+      const shrimp = new Shrimp({ myGlobal: 42 })
+
+      expect(shrimp.has('myGlobal')).toEqual(true)
+    })
+
+    test('returns true for prelude functions', () => {
+      const shrimp = new Shrimp()
+
+      expect(shrimp.has('echo')).toEqual(true)
+      expect(shrimp.has('type')).toEqual(true)
+    })
+  })
+
+  describe('call()', () => {
+    test('calls Shrimp functions with positional args', async () => {
+      const shrimp = new Shrimp()
+
+      await shrimp.run(`add = do x y:
+        x + y
+      end`)
+
+      const result = await shrimp.call('add', 5, 10)
+      expect(result).toEqual(15)
+    })
+
+    test('calls Shrimp functions with named args', async () => {
+      const shrimp = new Shrimp()
+
+      await shrimp.run(`greet = do name:
+        str.join [ 'Hello ' name ] ''
+      end`)
+
+      const result = await shrimp.call('greet', { name: 'World' })
+      expect(result).toEqual('Hello World')
+    })
+
+    test('calls native functions', async () => {
+      const shrimp = new Shrimp()
+
+      shrimp.set('multiply', (a: number, b: number) => a * b)
+
+      const result = await shrimp.call('multiply', 6, 7)
+      expect(result).toEqual(42)
+    })
+
+    test('calls prelude functions', async () => {
+      const shrimp = new Shrimp()
+
+      const result = await shrimp.call('type', 42)
+      expect(result).toEqual('number')
+    })
+
+    test('calls async functions', async () => {
+      const shrimp = new Shrimp()
+
+      shrimp.set('fetchData', async () => {
+        return await Promise.resolve('async data')
+      })
+
+      const result = await shrimp.call('fetchData')
+      expect(result).toEqual('async data')
+    })
+  })
+
+  describe('compile()', () => {
+    test('compiles code to bytecode', () => {
+      const shrimp = new Shrimp()
+
+      const bytecode = shrimp.compile('x = 5')
+
+      expect(bytecode).toHaveProperty('instructions')
+      expect(bytecode).toHaveProperty('constants')
+      expect(bytecode).toHaveProperty('labels')
+      expect(bytecode.instructions.length).toBeGreaterThan(0)
+    })
+
+    test('respects globals when compiling', () => {
+      const shrimp = new Shrimp({ customGlobal: 42 })
+
+      const bytecode = shrimp.compile('x = customGlobal')
+      expect(bytecode.instructions.length).toBeGreaterThan(0)
+    })
+
+    test('compiled bytecode can be run', async () => {
+      const shrimp = new Shrimp()
+
+      const bytecode = shrimp.compile('2 * 21')
+      const result = await shrimp.run(bytecode)
+
+      expect(result).toEqual(42)
+    })
+  })
+
+  describe('parse()', () => {
+    test('parses code to syntax tree', () => {
+      const shrimp = new Shrimp()
+
+      const tree = shrimp.parse('x = 5')
+
+      expect(tree).toHaveProperty('length')
+      expect(tree).toHaveProperty('cursor')
+      expect(tree.length).toBeGreaterThan(0)
+    })
+
+    test('respects globals when parsing', () => {
+      const shrimp = new Shrimp({ myVar: 42 })
+
+      const tree = shrimp.parse('x = myVar + 10')
+
+      // Should parse without errors
+      expect(tree).toHaveProperty('length')
+      expect(tree.length).toBeGreaterThan(0)
+    })
+
+    test('parses function definitions', () => {
+      const shrimp = new Shrimp()
+
+      const tree = shrimp.parse(`add = do x y:
+        x + y
+      end`)
+
+      expect(tree.length).toBeGreaterThan(0)
+    })
+  })
+
+  describe('get()', () => {
+    test('returns null for undefined variables', () => {
+      const shrimp = new Shrimp()
+
+      expect(shrimp.get('undefined')).toEqual(null)
+    })
+
+    test('returns values from code execution', async () => {
+      const shrimp = new Shrimp()
+
+      await shrimp.run('x = 42')
+      expect(shrimp.get('x')).toEqual(42)
+    })
+
+    test('returns arrays', async () => {
+      const shrimp = new Shrimp()
+
+      await shrimp.run('arr = [1 2 3]')
+      expect(shrimp.get('arr')).toEqual([1, 2, 3])
+    })
+
+    test('returns dicts', async () => {
+      const shrimp = new Shrimp()
+
+      await shrimp.run('dict = [a=1 b=2]')
+      expect(shrimp.get('dict')).toEqual({ a: 1, b: 2 })
+    })
+  })
+
+  describe('running bytecode directly', () => {
+    test('can run pre-compiled bytecode', async () => {
+      const shrimp = new Shrimp()
+
+      const bytecode = shrimp.compile('x = 100')
+      const result = await shrimp.run(bytecode)
+
+      expect(result).toEqual(100)
+      expect(shrimp.get('x')).toEqual(100)
+    })
+
+    test('maintains state across bytecode runs', async () => {
+      const shrimp = new Shrimp()
+
+      const bytecode1 = shrimp.compile('x = 10')
+      const bytecode2 = shrimp.compile('x + 5')
+
+      await shrimp.run(bytecode1)
+      const result = await shrimp.run(bytecode2)
+
+      expect(result).toEqual(15)
+    })
+  })
+})
+
+describe('Functional API', () => {
+  describe('runCode()', () => {
+    test('runs code and returns result', async () => {
+      const result = await runCode('1 + 1')
+      expect(result).toEqual(2)
+    })
+
+    test('works with globals', async () => {
+      const result = await runCode('greet', { greet: () => 'hello' })
+      expect(result).toEqual('hello')
+    })
+
+    test('has access to prelude', async () => {
+      const result = await runCode('type 42')
+      expect(result).toEqual('number')
+    })
+
+    test('returns null for empty code', async () => {
+      const result = await runCode('')
+      expect(result).toEqual(null)
+    })
+  })
+
+  describe('compileCode()', () => {
+    test('compiles code to bytecode', () => {
+      const bytecode = compileCode('x = 5')
+
+      expect(bytecode).toHaveProperty('instructions')
+      expect(bytecode).toHaveProperty('constants')
+      expect(bytecode.instructions.length).toBeGreaterThan(0)
+    })
+
+    test('respects globals', () => {
+      const bytecode = compileCode('x = myGlobal', { myGlobal: 42 })
+
+      expect(bytecode.instructions.length).toBeGreaterThan(0)
+    })
+
+    test('compiled bytecode is usable', async () => {
+      const bytecode = compileCode('21 * 2')
+      const result = await runCode('21 * 2')
+
+      expect(result).toEqual(42)
+    })
+  })
+
+  describe('parseCode()', () => {
+    test('parses code to syntax tree', () => {
+      const tree = parseCode('x = 5')
+
+      expect(tree).toHaveProperty('length')
+      expect(tree.length).toBeGreaterThan(0)
+    })
+
+    test('respects globals', () => {
+      const tree = parseCode('x = myGlobal', { myGlobal: 42 })
+
+      expect(tree.length).toBeGreaterThan(0)
+    })
+
+    test('handles complex expressions', () => {
+      const tree = parseCode(`add = do x y:
+        x + y
+      end
+      result = add 5 10`)
+
+      expect(tree.length).toBeGreaterThan(0)
+    })
+  })
+
+  describe('bytecodeToString()', () => {
+    test('converts bytecode to human-readable format', () => {
+      const bytecode = compileCode('x = 42')
+      const str = bytecodeToString(bytecode)
+
+      expect(typeof str).toEqual('string')
+      expect(str.length).toBeGreaterThan(0)
+    })
+
+    test('shows instructions', () => {
+      const bytecode = compileCode('1 + 1')
+      const str = bytecodeToString(bytecode)
+
+      // Should contain some opcodes
+      expect(str).toContain('PUSH')
+    })
+  })
+})
+
+describe('Integration tests', () => {
+  test('complex REPL-like workflow', async () => {
+    const shrimp = new Shrimp()
+
+    // Define a function
+    await shrimp.run(`double = do x:
+      x * 2
+    end`)
+    expect(shrimp.has('double')).toEqual(true)
+
+    // Use the function
+    const result1 = await shrimp.run('double 21')
+    expect(result1).toEqual(42)
+
+    // Call it from TypeScript
+    const result2 = await shrimp.call('double', 50)
+    expect(result2).toEqual(100)
+
+    // Define another function using the first
+    await shrimp.run(`quadruple = do x:
+      double (double x)
+    end`)
+
+    const result3 = await shrimp.run('quadruple 5')
+    expect(result3).toEqual(20)
+  })
+
+  test('mixing native and Shrimp functions', async () => {
+    const shrimp = new Shrimp({
+      log: (msg: string) => `Logged: ${msg}`,
+      multiply: (a: number, b: number) => a * b,
+    })
+
+    await shrimp.run(`greet = do name:
+      log name
+    end`)
+
+    const result1 = await shrimp.run('greet Alice')
+    expect(result1).toEqual('Logged: Alice')
+
+    await shrimp.run(`calc = do x:
+      multiply x 3
+    end`)
+
+    const result2 = await shrimp.run('calc 7')
+    expect(result2).toEqual(21)
+  })
+
+  test('working with arrays and dicts', async () => {
+    const shrimp = new Shrimp()
+
+    await shrimp.run('nums = [1 2 3 4 5]')
+    expect(shrimp.get('nums')).toEqual([1, 2, 3, 4, 5])
+
+    await shrimp.run("config = [host='localhost' port=3000]")
+    expect(shrimp.get('config')).toEqual({ host: 'localhost', port: 3000 })
+
+    const result = await shrimp.run('length nums')
+    expect(result).toEqual(5)
+  })
+
+  test('compile once, run multiple times', async () => {
+    const bytecode = compileCode('x * 2')
+
+    const shrimp1 = new Shrimp()
+    shrimp1.set('x', 10)
+    const result1 = await shrimp1.run(bytecode)
+    expect(result1).toEqual(20)
+
+    const shrimp2 = new Shrimp()
+    shrimp2.set('x', 100)
+    const result2 = await shrimp2.run(bytecode)
+    expect(result2).toEqual(200)
+  })
 })