import dict only=something

src/compiler/compiler.ts

@@ -799,16 +799,24 @@ export class Compiler {
 
       case terms.Import: {
         const instructions: ProgramItem[] = []
-        const [_import, ...dicts] = getAllChildren(node)
+        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'])
 
-        dicts.forEach((dict) =>
+        args.forEach((dict) =>
           instructions.push(['PUSH', input.slice(dict.from, dict.to)])
         )
 
-        instructions.push(['PUSH', dicts.length])
+        namedArgs.forEach((arg) => {
-        instructions.push(['PUSH', 0])
+          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

src/compiler/tests/compiler.test.ts

@@ -465,4 +465,14 @@ describe('import', () => {
       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

@@ -165,7 +165,7 @@ Throw {
 
 // this has to be in the parse tree so the scope tracker can use it
 Import { 
-  import AssignableIdentifier+
+  import NamedArg* Identifier+ NamedArg*
 }
 
 ConditionalOp {

src/parser/shrimp.ts

@@ -7,9 +7,9 @@ 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, import:166}
 export const parser = LRParser.deserialize({
   version: 14,
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+  goto: "9Z#lPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP#mP$WP$m%k&y'PP(Z(g)a)dP)jP*q*qPPPP*uP+R+kPPP,R#mP,s-^P-b-h-}P.t/x$W$WP$WP$WP$W$W1O1U1b2U2d2n2t2{3R3]3c3m3wPPP4V4Z5O6tPPP8OP8`PPPPP8d8j8praOf!c!d!e!h!w#x$Q$R$S$d$l${%_%i%tQ!YXR#f!TwaOXf!T!c!d!e!h!w#x$Q$R$S$d$l${%_%i%tr_Of!c!d!e!h!w#x$Q$R$S$d$l${%_%i%tQ!]XS!qh%hQ!viQ!zkQ#]!QQ#_!PQ#b!RR#i!TvTOfh!c!d!e!h!w#x$Q$R$S$d$l${%_%h%i%t!W[STZikuxz{|}!O!P!Q!R!U!V!_!b!p#j#o#t$^$t%]%kS!VX!TQ#OmR#PnQ!XXR#e!TrSOf!c!d!e!h!w#x$Q$R$S$d$l${%_%i%t!WySTZikuxz{|}!O!P!Q!R!U!V!_!b!p#j#o#t$^$t%]%kS!UX!TT!ph%hevSTx!U!V!p#j$t%]%kraOf!c!d!e!h!w#x$Q$R$S$d$l${%_%i%tdtSTx!U!V!p#j$t%]%kQ!YXQ#TuR#f!TR!ogX!mg!k!n#}#S[OSTXZfhikuxz{|}!O!P!Q!R!T!U!V!_!b!c!d!e!h!p!w#j#o#t#x$Q$R$S$^$d$l$t${%]%_%h%i%k%tR$O!lTpQrQ$j#yQ$q$TQ%Q$kR%d%RQ#y!eQ$T!wQ$m$RQ$n$SQ%`${Q%l%_Q%r%iR%u%tQ$i#yQ$p$TQ$}$jQ%P$kQ%Z$qS%c%Q%RR%n%ddvSTx!U!V!p#j$t%]%kQ!`Z[!|l!{!}$U$V$rQ#m!_X#p!`#m#q$[vUOXf!T!c!d!e!h!w#x$Q$R$S$d$l${%_%i%tT!sh%hT%S$m%TQ%W$mR%g%TwUOXf!T!c!d!e!h!w#x$Q$R$S$d$l${%_%i%trWOf!c!d!e!h!w#x$Q$R$S$d$l${%_%i%tQ!WXQ!ykQ#V{Q#Y|Q#[}R#d!T#T[OSTXZfhikuxz{|}!O!P!Q!R!T!U!V!_!b!c!d!e!h!p!w#j#o#t#x$Q$R$S$^$d$l$t${%]%_%h%i%k%t![[STZhikuxz{|}!O!P!Q!R!U!V!_!b!p#j#o#t$^$t%]%h%kw]OXf!T!c!d!e!h!w#x$Q$R$S$d$l${%_%i%tQfOR!if^!fc!^#u#v#w$c$kR#z!fQ!TXQ!_Z`#c!T!_#j#k$X$t%]%kS#j!U!VS#k!W!]S$X#d#iQ$t$ZR%]$uQ!kgQ!{lU#|!k!{$VR$V!}Q!ngQ#}!kT$P!n#}QrQR#RrS$d#x$lR$y$dQ$u$ZR%^$uYxST!U!V!pR#UxQ%T$mR%e%TQ#q!`Q$[#mT$`#q$[Q#t!bQ$^#oT$a#t$^Q!}lQ$U!{U$W!}$U$rR$r$VTeOfScOfS!^X!TQ#u!cQ#v!d`#w!e!w$R$S${%_%i%tQ#{!hU$c#x$d$lR$k$QvVOXf!T!c!d!e!h!w#x$Q$R$S$d$l${%_%i%tdtSTx!U!V!p#j$t%]%kQ!bZS!rh%hQ!uiQ!xkQ#TuQ#VzQ#W{Q#X|Q#Z}Q#]!OQ#^!PQ#`!QQ#a!RQ#o!_X#s!b#o#t$^r^Of!c!d!e!h!w#x$Q$R$S$d$l${%_%i%t![ySTZhikuxz{|}!O!P!Q!R!U!V!_!b!p#j#o#t$^$t%]%h%kQ![XR#h!T[wSTx!U!V!pQ$Z#jV%[$t%]%kTqQrQ$e#xR%R$lQ!thR%q%hrbOf!c!d!e!h!w#x$Q$R$S$d$l${%_%i%tQ!ZXR#g!T",
   nodeNames: "⚠ Star Slash Plus Minus And Or Eq EqEq Neq Lt Lte Gt Gte Modulo PlusEq MinusEq StarEq SlashEq ModuloEq Band Bor Bxor Shl Shr Ushr NullishCoalesce NullishEq Identifier AssignableIdentifier Word IdentifierBeforeDot CurlyString Do Comment Program PipeExpr operator WhileExpr keyword ConditionalOp ParenExpr FunctionCall DotGet Number PositionalArg FunctionDef Params NamedParam NamedArgPrefix String StringFragment Interpolation EscapeSeq DoubleQuote Boolean Null colon CatchExpr keyword Block FinallyExpr keyword keyword Underscore NamedArg IfExpr keyword FunctionCall ElseIfExpr keyword ElseExpr FunctionCallOrIdentifier BinOp Regex Dict Array FunctionCallWithBlock TryExpr keyword Throw keyword Import keyword CompoundAssign Assign",
   maxTerm: 124,
   context: trackScope,
@@ -23,5 +23,5 @@ export const parser = LRParser.deserialize({
   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: 2299
+  tokenPrec: 2370
 })

src/parser/tests/basics.test.ts

@@ -1023,7 +1023,7 @@ describe('import', () => {
     expect(`import str`).toMatchTree(`
       Import
         keyword import
-        AssignableIdentifier str
+        Identifier str
       `)
   })
 
@@ -1031,9 +1031,20 @@ describe('import', () => {
     expect(`import str math list`).toMatchTree(`
       Import
         keyword import
-        AssignableIdentifier str
+        Identifier str
-        AssignableIdentifier math
+        Identifier math
-        AssignableIdentifier list
+        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

@@ -45,7 +45,12 @@ export const globals = {
     return typeof v !== 'string' || this.scope.has(v)
   },
   ref: (fn: Function) => fn,
-  import: function (this: VM, ...idents: string[]) {
+  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)
 
@@ -54,6 +59,7 @@ export const globals = {
 
       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)
       }
     }