use `expression1 / expression2 / ... / expressionn` throw `peg$SyntaxError: Expected end of input but "d" found.`

[wszgrcy]

INPUT =value1:'aabbcc' / value2:.*{
  if (value1) {
    return {value:value1,type:1}
  }else {
    return {value:value2,type:2}
  }
}

I want match rule1 or rule2 or ... and return a object {value,type} if input aabbcc(less or equal than first expression) ,can get output, but if input aabbccd(greater than first expression), throw error

peg$SyntaxError: Expected end of input but "d" found.
    at new peg$SyntaxError (eval at compile (E:\Code\TEST\node_modules\peggy\lib\compiler\index.js:129:16), <anonymous>:14:20)
    at peg$buildStructuredError (eval at compile (E:\Code\TEST\node_modules\peggy\lib\compiler\index.js:129:16), <anonymous>:399:12)   
    at Object.peg$parse [as parse] (eval at compile (E:\Code\TEST\node_modules\peggy\lib\compiler\index.js:129:16), <anonymous>:476:11)
    at test (E:\Code\TEST\peggy\index.ts:23:25)
    at Object.<anonymous> (E:\Code\TEST\peggy\index.ts:27:1)
    at Module._compile (node:internal/modules/cjs/loader:1103:14)
    at Module.m._compile (E:\msys2\home\tom\.nvm\versions\node\v16.14.0\bin\node_modules\ts-node\src\index.ts:1618:23)
    at Module._extensions..js (node:internal/modules/cjs/loader:1155:10)
    at Object.require.extensions.<computed> [as .ts] (E:\msys2\home\tom\.nvm\versions\node\v16.14.0\bin\node_modules\ts-node\src\index.ts:1621:12)
    at Module.load (node:internal/modules/cjs/loader:981:32) {
  expected: [ { type: 'end' } ],
  found: 'd',
  location: {
    source: undefined,
    start: { offset: 6, line: 1, column: 7 },
    end: { offset: 7, line: 1, column: 8 }
  }
}

Is there a problem with me using it? I think /is like rule1||rule2|...||rule,But it seems like partial success is considered a success

[wszgrcy]

I add !. to sovled ,but I don't know the / real purpose

[hildjj]

a / b tries a, and if it matches, then the whole rule matches without trying b. At a higher level, if there is input left when your grammar's first rule matches, that's an error.

[wszgrcy]

a / b tries a, and if it matches, then the whole rule matches without trying b. At a higher level, if there is input left when your grammar's first rule matches, that's an error.

not match and match but not full match are two different status? so I need to convert match but not full match=>not match (add !. not match any char in end)

[hildjj]

If you want to match just the beginning part of text, and don't care if there is extra text at the end, you could do:

INPUT 
  = value1:'aabbcc' .*
  / value2:.*

[hildjj]

I am assuming this fixed your issue. If not, please re-open, and ask more questions.