chore: add linters and some lint fixes (#8)

* chore: add linters and some lint fixes

Configure some golangci-lint linters to get the code quality right.
Apply the first fixes.

Next step will be to add github actions to run lint and tests in
github CI.

* chore: more lint, fixed comments and variable names. no semantic change.

* chore: add Makefile

This makefile is intended to be used as a local substitute to github
actions.

1 files changed, 0 insertions, 115 deletions

diff --git a/lang/tokenid_string.go b/lang/tokenid_string.go
deleted file mode 100644
index 705edc6..0000000
--- a/lang/tokenid_string.go
+++ /dev/null
@@ -1,115 +0,0 @@
-// Code generated by "stringer -type=TokenId"; DO NOT EDIT.
-
-package lang
-
-import "strconv"
-
-func _() {
-	// An "invalid array index" compiler error signifies that the constant values have changed.
-	// Re-run the stringer command to generate them again.
-	var x [1]struct{}
-	_ = x[Illegal-0]
-	_ = x[Comment-1]
-	_ = x[Ident-2]
-	_ = x[Char-3]
-	_ = x[Float-4]
-	_ = x[Imag-5]
-	_ = x[Int-6]
-	_ = x[String-7]
-	_ = x[Add-8]
-	_ = x[Sub-9]
-	_ = x[Mul-10]
-	_ = x[Quo-11]
-	_ = x[Rem-12]
-	_ = x[And-13]
-	_ = x[Or-14]
-	_ = x[Xor-15]
-	_ = x[Shl-16]
-	_ = x[Shr-17]
-	_ = x[AndNot-18]
-	_ = x[Period-19]
-	_ = x[Equal-20]
-	_ = x[Greater-21]
-	_ = x[GreaterEqual-22]
-	_ = x[Land-23]
-	_ = x[Less-24]
-	_ = x[LessEqual-25]
-	_ = x[Lor-26]
-	_ = x[NotEqual-27]
-	_ = x[Define-28]
-	_ = x[Assign-29]
-	_ = x[AddAssign-30]
-	_ = x[SubAssign-31]
-	_ = x[MulAssign-32]
-	_ = x[QuoAssign-33]
-	_ = x[RemAssign-34]
-	_ = x[AndAssign-35]
-	_ = x[OrAssign-36]
-	_ = x[XorAssign-37]
-	_ = x[ShlAssign-38]
-	_ = x[ShrAssign-39]
-	_ = x[AndNotAssign-40]
-	_ = x[Inc-41]
-	_ = x[Dec-42]
-	_ = x[Plus-43]
-	_ = x[Minus-44]
-	_ = x[Addr-45]
-	_ = x[Deref-46]
-	_ = x[BitComp-47]
-	_ = x[Arrow-48]
-	_ = x[Ellipsis-49]
-	_ = x[Not-50]
-	_ = x[Tilde-51]
-	_ = x[Comma-52]
-	_ = x[Semicolon-53]
-	_ = x[Colon-54]
-	_ = x[ParenBlock-55]
-	_ = x[BracketBlock-56]
-	_ = x[BraceBlock-57]
-	_ = x[Break-58]
-	_ = x[Case-59]
-	_ = x[Chan-60]
-	_ = x[Const-61]
-	_ = x[Continue-62]
-	_ = x[Default-63]
-	_ = x[Defer-64]
-	_ = x[Else-65]
-	_ = x[Fallthrough-66]
-	_ = x[For-67]
-	_ = x[Func-68]
-	_ = x[Go-69]
-	_ = x[Goto-70]
-	_ = x[If-71]
-	_ = x[Import-72]
-	_ = x[Interface-73]
-	_ = x[Map-74]
-	_ = x[Package-75]
-	_ = x[Range-76]
-	_ = x[Return-77]
-	_ = x[Select-78]
-	_ = x[Struct-79]
-	_ = x[Switch-80]
-	_ = x[Type-81]
-	_ = x[Var-82]
-	_ = x[Call-83]
-	_ = x[CallX-84]
-	_ = x[EqualSet-85]
-	_ = x[Grow-86]
-	_ = x[Index-87]
-	_ = x[JumpFalse-88]
-	_ = x[JumpSetFalse-89]
-	_ = x[JumpSetTrue-90]
-	_ = x[Label-91]
-	_ = x[New-92]
-}
-
-const _TokenId_name = "IllegalCommentIdentCharFloatImagIntStringAddSubMulQuoRemAndOrXorShlShrAndNotPeriodEqualGreaterGreaterEqualLandLessLessEqualLorNotEqualDefineAssignAddAssignSubAssignMulAssignQuoAssignRemAssignAndAssignOrAssignXorAssignShlAssignShrAssignAndNotAssignIncDecPlusMinusAddrDerefBitCompArrowEllipsisNotTildeCommaSemicolonColonParenBlockBracketBlockBraceBlockBreakCaseChanConstContinueDefaultDeferElseFallthroughForFuncGoGotoIfImportInterfaceMapPackageRangeReturnSelectStructSwitchTypeVarCallCallXEqualSetGrowIndexJumpFalseJumpSetFalseJumpSetTrueLabelNew"
-
-var _TokenId_index = [...]uint16{0, 7, 14, 19, 23, 28, 32, 35, 41, 44, 47, 50, 53, 56, 59, 61, 64, 67, 70, 76, 82, 87, 94, 106, 110, 114, 123, 126, 134, 140, 146, 155, 164, 173, 182, 191, 200, 208, 217, 226, 235, 247, 250, 253, 257, 262, 266, 271, 278, 283, 291, 294, 299, 304, 313, 318, 328, 340, 350, 355, 359, 363, 368, 376, 383, 388, 392, 403, 406, 410, 412, 416, 418, 424, 433, 436, 443, 448, 454, 460, 466, 472, 476, 479, 483, 488, 496, 500, 505, 514, 526, 537, 542, 545}
-
-func (i TokenId) String() string {
-	if i < 0 || i >= TokenId(len(_TokenId_index)-1) {
-		return "TokenId(" + strconv.FormatInt(int64(i), 10) + ")"
-	}
-	return _TokenId_name[_TokenId_index[i]:_TokenId_index[i+1]]
-}