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parse defaults

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This commit is contained in:
Chris Wanstrath 2025-11-02 14:04:32 -08:00
parent f14013aa55
commit 1791e5a6c7
4 changed files with 91 additions and 31 deletions
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6
src/parser/shrimp.grammar
View File

@ -175,7 +175,11 @@ ConditionalOp {
} }
Params { Params {
Identifier* Identifier* NamedParam*
}
NamedParam {
NamedArgPrefix expressionWithoutIdentifier
} }
Assign { Assign {

39
src/parser/shrimp.terms.ts
View File

@ -43,22 +43,23 @@ export const
NamedArgPrefix = 41, NamedArgPrefix = 41,
FunctionDef = 42, FunctionDef = 42,
Params = 43, Params = 43,
colon = 44, NamedParam = 44,
CatchExpr = 45, colon = 45,
keyword = 68, CatchExpr = 46,
TryBlock = 47, keyword = 69,
FinallyExpr = 48, TryBlock = 48,
Underscore = 51, FinallyExpr = 49,
Array = 52, Underscore = 52,
Null = 53, Array = 53,
ConditionalOp = 54, Null = 54,
PositionalArg = 55, ConditionalOp = 55,
TryExpr = 57, PositionalArg = 56,
Throw = 59, TryExpr = 58,
IfExpr = 61, Throw = 60,
SingleLineThenBlock = 63, IfExpr = 62,
ThenBlock = 64, SingleLineThenBlock = 64,
ElseIfExpr = 65, ThenBlock = 65,
ElseExpr = 67, ElseIfExpr = 66,
CompoundAssign = 69, ElseExpr = 68,
Assign = 70 CompoundAssign = 70,
Assign = 71

22
src/parser/shrimp.ts
View File

@ -4,24 +4,24 @@ import {operatorTokenizer} from "./operatorTokenizer"
import {tokenizer, specializeKeyword} from "./tokenizer" import {tokenizer, specializeKeyword} from "./tokenizer"
import {trackScope} from "./scopeTracker" import {trackScope} from "./scopeTracker"
import {highlighting} from "./highlight" import {highlighting} from "./highlight"
const spec_Identifier = {__proto__:null,catch:92, finally:98, end:100, null:106, try:116, throw:120, if:124, elseif:132, else:136} const spec_Identifier = {__proto__:null,catch:94, finally:100, end:102, null:108, try:118, throw:122, if:126, elseif:134, else:138}
export const parser = LRParser.deserialize({ export const parser = LRParser.deserialize({
version: 14, version: 14,
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tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO!z~~", 11)], tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO!|~~", 11)],
topRules: {"Program":[0,25]}, 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}], 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: 1591 tokenPrec: 1634
}) })

55
src/parser/tests/functions.test.ts
View File

@ -177,3 +177,58 @@ end`).toMatchTree(`
`) `)
}) })
}) })
describe('default params', () => {
test('parses function with single default parameter', () => {
expect('do x=1: x + 1 end').toMatchTree(`
FunctionDef
Do do
Params
NamedParam
NamedArgPrefix x=
Number 1
colon :
BinOp
Identifier x
Plus +
Number 1
keyword end`)
})
test('parses function with multiple default parameters', () => {
expect(`do x='something' y=true: x * y end`).toMatchTree(`
FunctionDef
Do do
Params
NamedParam
NamedArgPrefix x=
String
StringFragment something
NamedParam
NamedArgPrefix y=
Boolean true
colon :
BinOp
Identifier x
Star *
Identifier y
keyword end`)
})
test('parses function with mixed parameters', () => {
expect('do x y=true: x * y end').toMatchTree(`
FunctionDef
Do do
Params
Identifier x
NamedParam
NamedArgPrefix y=
Boolean true
colon :
BinOp
Identifier x
Star *
Identifier y
keyword end`)
})
})