Merge pull request 'import dict' (#45) from import into main

Reviewed-on: #45

bin/shrimp

@@ -2,34 +2,78 @@
 
 import { colors } from '../src/prelude'
 import { treeToString } from '../src/utils/tree'
-import { runFile, compileFile, parseCode } from '../src'
+import { runCode, runFile, compileFile, parseCode } from '../src'
 import { bytecodeToString } from 'reefvm'
-import { readFileSync, writeFileSync, mkdirSync } from 'fs'
-import { randomUUID } from 'crypto'
+import { readFileSync } from 'fs'
 import { spawn } from 'child_process'
 import { join } from 'path'
 
 function showHelp() {
   console.log(`${colors.bright}${colors.magenta}🦐 Shrimp${colors.reset} is a scripting language in a shell.
 
-${colors.bright}Usage:${colors.reset} shrimp <command> [...args]
+${colors.bright}Usage:${colors.reset} shrimp <command> [options] [...args]
 
 ${colors.bright}Commands:${colors.reset}
   ${colors.cyan}run      ${colors.yellow}./my-file.sh${colors.reset}    Execute a file with Shrimp
   ${colors.cyan}parse    ${colors.yellow}./my-file.sh${colors.reset}    Print parse tree for Shrimp file
   ${colors.cyan}bytecode ${colors.yellow}./my-file.sh${colors.reset}    Print bytecode for Shrimp file
-  ${colors.cyan}eval     ${colors.yellow}'some code'${colors.reset}     Evaluate a line of Shrimp code     
+  ${colors.cyan}eval     ${colors.yellow}'some code'${colors.reset}     Evaluate a line of Shrimp code
+  ${colors.cyan}print    ${colors.yellow}'some code'${colors.reset}     Evaluate a line of Shrimp code and print the result
   ${colors.cyan}repl${colors.reset}                     Start REPL
   ${colors.cyan}help${colors.reset}                     Print this help message
-  ${colors.cyan}version${colors.reset}                  Print version`)
+  ${colors.cyan}version${colors.reset}                  Print version
+
+${colors.bright}Options:${colors.reset}
+  ${colors.cyan}eval -I${colors.reset} ${colors.yellow}<module>${colors.reset}         Import module (can be repeated)
+                           Example: shrimp -I math -e 'random | echo'
+                           Example: shrimp -Imath -Istr -e 'random | echo'`)
 }
 
 function showVersion() {
   console.log('🦐 v0.0.1')
 }
 
+async function evalCode(code: string, imports: string[]) {
+  const importStatement = imports.length > 0 ? `import ${imports.join(' ')}` : ''
+  if (importStatement) code = `${importStatement}; ${code}`
+  return await runCode(code)
+}
+
 async function main() {
-  const args = process.argv.slice(2)
+  let args = process.argv.slice(2)
+
+  if (args.length === 0) {
+    showHelp()
+    return
+  }
+
+  // Parse -I flags for imports (supports both "-I math" and "-Imath")
+  const imports: string[] = []
+
+  while (args.length > 0) {
+    const arg = args[0]
+
+    if (arg === '-I') {
+      // "-I math" format
+      if (args.length < 2) {
+        console.log(`${colors.bright}error: -I requires a module name${colors.reset}`)
+        process.exit(1)
+      }
+      imports.push(args[1])
+      args = args.slice(2)
+    } else if (arg.startsWith('-I')) {
+      // "-Imath" format
+      const moduleName = arg.slice(2)
+      if (!moduleName) {
+        console.log(`${colors.bright}error: -I requires a module name${colors.reset}`)
+        process.exit(1)
+      }
+      imports.push(moduleName)
+      args = args.slice(1)
+    } else {
+      break
+    }
+  }
 
   if (args.length === 0) {
     showHelp()
@@ -63,10 +107,18 @@ async function main() {
       process.exit(1)
     }
 
-    try { mkdirSync('/tmp/shrimp') } catch { }
-    const path = `/tmp/shrimp/${randomUUID()}.sh`
-    writeFileSync(path, code)
-    console.log(await runFile(path))
+    await evalCode(code, imports)
+    return
+  }
+
+  if (['print', '-print', '--print', '-E'].includes(command)) {
+    const code = args[1]
+    if (!code) {
+      console.log(`${colors.bright}usage: shrimp print <code>${colors.reset}`)
+      process.exit(1)
+    }
+
+    console.log(await evalCode(code, imports))
     return
   }
 

src/compiler/compiler.ts

@@ -797,6 +797,31 @@ export class Compiler {
         return instructions
       }
 
+      case terms.Import: {
+        const instructions: ProgramItem[] = []
+        const [_import, ...nodes] = getAllChildren(node)
+        const args = nodes.filter(node => node.type.id === terms.Identifier)
+        const namedArgs = nodes.filter(node => node.type.id === terms.NamedArg)
+
+        instructions.push(['LOAD', 'import'])
+
+        args.forEach((dict) =>
+          instructions.push(['PUSH', input.slice(dict.from, dict.to)])
+        )
+
+        namedArgs.forEach((arg) => {
+          const { name, valueNode } = getNamedArgParts(arg, input)
+          instructions.push(['PUSH', name])
+          instructions.push(...this.#compileNode(valueNode, input))
+        })
+
+        instructions.push(['PUSH', args.length])
+        instructions.push(['PUSH', namedArgs.length])
+        instructions.push(['CALL'])
+
+        return instructions
+      }
+
       case terms.Comment: {
         return [] // ignore comments
       }

src/compiler/tests/compiler.test.ts

@@ -448,3 +448,31 @@ describe('Compound assignment operators', () => {
     expect('x = 10; x %= 3; x').toEvaluateTo(1)
   })
 })
+
+describe('import', () => {
+  test('imports single dict', () => {
+    expect(`import str; starts-with? abc a`).toEvaluateTo(true)
+  })
+
+  test('imports multiple dicts', () => {
+    expect(`import str math list; map [1 2 3] do x: x * 2 end`).toEvaluateTo([2, 4, 6])
+  })
+
+  test('imports non-prelude dicts', () => {
+    expect(`
+      abc = [a=true b=yes c=si]
+      import abc
+      abc.b
+    `).toEvaluateTo('yes')
+  })
+
+  test('can specify imports', () => {
+    expect(`import str only=ends-with?; ref ends-with? | function?`).toEvaluateTo(true)
+    expect(`import str only=ends-with?; ref starts-with? | function?`).toEvaluateTo(false)
+    expect(`
+      abc = [a=true b=yes c=si]
+      import abc only=[a c]
+      [a c]
+      `).toEvaluateTo([true, 'si'])
+  })
+})

src/parser/shrimp.grammar

@@ -41,6 +41,7 @@ try { @specialize[@name=keyword]<Identifier, "try"> }
 catch { @specialize[@name=keyword]<Identifier, "catch"> }
 finally { @specialize[@name=keyword]<Identifier, "finally"> }
 throw { @specialize[@name=keyword]<Identifier, "throw"> }
+import { @specialize[@name=keyword]<Identifier, "import"> }
 null { @specialize[@name=Null]<Identifier, "null"> }
 
 @external tokens tokenizer from "./tokenizer" { Identifier, AssignableIdentifier, Word, IdentifierBeforeDot, CurlyString }
@@ -72,6 +73,7 @@ consumeToTerminator {
   ambiguousFunctionCall |
   TryExpr |
   Throw |
+  Import |
   IfExpr |
   FunctionDef |
   CompoundAssign |
@@ -161,6 +163,11 @@ Throw {
   throw (BinOp | ConditionalOp | expression)
 }
 
+// this has to be in the parse tree so the scope tracker can use it
+Import { 
+  import NamedArg* Identifier+ NamedArg*
+}
+
 ConditionalOp {
   expression !comparison EqEq expression |
   expression !comparison Neq expression |

src/parser/shrimp.terms.ts

@@ -37,7 +37,7 @@ export const
   Program = 35,
   PipeExpr = 36,
   WhileExpr = 38,
-  keyword = 81,
+  keyword = 83,
   ConditionalOp = 40,
   ParenExpr = 41,
   FunctionCallWithNewlines = 42,
@@ -73,5 +73,6 @@ export const
   FunctionCallWithBlock = 77,
   TryExpr = 78,
   Throw = 80,
-  CompoundAssign = 82,
-  Assign = 83
+  Import = 82,
+  CompoundAssign = 84,
+  Assign = 85

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:78, null:112, catch:118, finally:124, end:126, if:134, else:140, try:158, throw:162}
+const spec_Identifier = {__proto__:null,while:78, null:112, catch:118, finally:124, end:126, if:134, else:140, try:158, throw:162, import:166}
 export const parser = LRParser.deserialize({
   version: 14,
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+  repeatNodeCount: 13,
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+  tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO#`~~", 11)],
   topRules: {"Program":[0,35]},
   specialized: [{term: 28, get: (value: any, stack: any) => (specializeKeyword(value, stack) << 1), external: specializeKeyword},{term: 28, get: (value: keyof typeof spec_Identifier) => spec_Identifier[value] || -1}],
-  tokenPrec: 2256
+  tokenPrec: 2370
 })

src/parser/tests/basics.test.ts

@@ -1017,3 +1017,34 @@ Assign
         `)
   })
 })
+
+describe('import', () => {
+  test('parses single import', () => {
+    expect(`import str`).toMatchTree(`
+      Import
+        keyword import
+        Identifier str
+      `)
+  })
+
+  test('parses multiple imports', () => {
+    expect(`import str math list`).toMatchTree(`
+      Import
+        keyword import
+        Identifier str
+        Identifier math
+        Identifier list
+      `)
+  })
+
+  test('parses named args', () => {
+    expect(`import str only=ends-with?`).toMatchTree(`
+      Import
+        keyword import
+        Identifier str
+        NamedArg
+          NamedArgPrefix only=
+          Identifier ends-with?
+      `)
+  })
+})

src/prelude/index.ts

@@ -45,6 +45,25 @@ export const globals = {
     return typeof v !== 'string' || this.scope.has(v)
   },
   ref: (fn: Function) => fn,
+  import: function (this: VM, atNamed: Record<any, string | string[]> = {}, ...idents: string[]) {
+    const onlyArray = Array.isArray(atNamed.only) ? atNamed.only : [atNamed.only].filter(a => a)
+    const only = new Set(onlyArray)
+    const wantsOnly = only.size > 0
+
+
+    for (const ident of idents) {
+      const module = this.get(ident)
+
+      if (!module) throw new Error(`import: can't find ${ident}`)
+      if (module.type !== 'dict') throw new Error(`import: can't import ${module.type}`)
+
+      for (const [name, value] of module.value.entries()) {
+        if (value.type === 'dict') throw new Error(`import: can't import dicts in dicts`)
+        if (wantsOnly && !only.has(name)) continue
+        this.set(name, value)
+      }
+    }
+  },
 
   // env
   args: Bun.argv.slice(1),