fix(config):resolve expected type in defaultResolver #1565

[zjx-ERROR]

Description (what this PR does / why we need it):

Which issue(s) this PR fixes (resolves / be part of):

Other special notes for the reviewers:

[kagaya85]

I feel a little confused about this, could you please describe why we need a case 'M'? and I can see the 'FNTfnt' matches the 'True|False|Null', so what does the 'OYoy' character match?

[kagaya85]

Thanks for your contribution, one suggestion, it's a good idea to add some description about this PR for reviewers to review :)

fix #1565

[zjx-ERROR]

Hey, @kagaya85 ,thanks for your suggestion.
The resolveTable could generated by following:

var resolveTable = make([]byte,256)
// Sign
resolveTable[int('+')] = 'S'
resolveTable[int('-')] = 'S'
// Digit
for _, c := range "0123456789" {
    resolveTable[int(c)] = 'D' 
}
// In map
for _, c := range "yYnNtTfFoO~" {
    resolveTable[int(c)] = 'M'
}
// Float
resolveTable[int('.')] = '.'

The resolveMap is a predefined map of potential types.

"<<" is merge key,see: merge key. I'm sorry this part hasn't been completed yet, which makes you confused.And I remove "<<" temporarily.

[codecov-commenter]

Codecov Report

Merging #2134 (a2882cd) into main (25c5996) will decrease coverage by 0.70%.
The diff coverage is 40.29%.

❗ Current head a2882cd differs from pull request most recent head 30f49dc. Consider uploading reports for the commit 30f49dc to get more accurate results

@@            Coverage Diff             @@
##             main    #2134      +/-   ##
==========================================
- Coverage   79.08%   78.37%   -0.71%     
==========================================
  Files          84       84              
  Lines        3696     3760      +64     
==========================================
+ Hits         2923     2947      +24     
- Misses        560      594      +34     
- Partials      213      219       +6     

Impacted Files	Coverage Δ
config/options.go	62.40% <40.29%> (-26.13%)	⬇️

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[kagaya85]

Hey, @kagaya85 ,thanks for your suggestion. The resolveTable could generated by following:

var resolveTable = make([]byte,256)
// Sign
resolveTable[int('+')] = 'S'
resolveTable[int('-')] = 'S'
// Digit
for _, c := range "0123456789" {
    resolveTable[int(c)] = 'D' 
}
// In map
for _, c := range "yYnNtTfFoO~" {
    resolveTable[int(c)] = 'M'
}
// Float
resolveTable[int('.')] = '.'

The resolveMap is a predefined map of potential types.

Thanks for your explanation, and my question is, the resolveTable will map "yYoO" to case M, but I don't see any keys in resolveMap begin with "yYoO", so maybe it is not necessary? Please let me know if I have missed anything.

One more thing, it looks like some additional test cases are needed to better explain and maintain the coverage.