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parser_test.go
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package eval
import (
"math"
"reflect"
"testing"
"time"
)
type verifyNode struct {
tpy uint8
data Value
cost float64
variableKey VariableKey
children []verifyNode
}
var assertAstTreeIdentical = func(t *testing.T, got *astNode, want verifyNode, msg ...any) {
var q1 []*astNode
var q2 []verifyNode
q1 = append(q1, got)
q2 = append(q2, want)
for len(q1) != 0 {
// pull from head
got, q1 = q1[0], q1[1:]
want, q2 = q2[0], q2[1:]
// check node value
if !reflect.DeepEqual(got.node.value, want.data) {
t.Fatalf("node value mismatched, got: %+v, want: %+v, msg: %+v", got.node.value, want.data, msg)
}
// check node type
nodeType := got.node.getNodeType()
if want.tpy != nodeType {
t.Fatalf("node type mismatched, got: %+v, want: %+v, msg: %+v", nodeType, want.tpy, msg)
}
if want.cost != 0 && math.Abs(want.cost-got.cost) > 0.00001 {
t.Fatalf("node cost mismatched, got: %+v, want: %+v, msg: %+v", got.cost, want.cost, msg)
}
if want.variableKey != VariableKey(0) && want.variableKey != got.node.varKey {
t.Fatalf("node varKey mismatched, got: %+v, want: %+v, msg: %+v", got.node.varKey, want.variableKey, msg)
}
// check children
if len(want.children) != len(got.children) {
t.Fatalf("node children mismatched, got: %+v, want: %+v, msg: %+v", len(got.children), len(want.children), msg)
}
for i := 0; i < len(want.children); i++ {
q2 = append(q2, want.children[i])
q1 = append(q1, got.children[i])
}
}
}
func TestLex(t *testing.T) {
testCases := []struct {
expr string
tokens []token
cc *Config
errMsg string
}{
{
expr: `(+ 1 1)`,
tokens: []token{
{typ: lParen, val: "("},
{typ: ident, val: "+"},
{typ: integer, val: "1"},
{typ: integer, val: "1"},
{typ: rParen, val: ")"},
},
},
{
expr: `1 + 2`,
tokens: []token{
{typ: integer, val: "1"},
{typ: ident, val: "+"},
{typ: integer, val: "2"},
},
},
{
expr: `!a`,
tokens: []token{
{typ: ident, val: "!"},
{typ: ident, val: "a"},
},
cc: NewConfig(EnableInfixNotation),
},
{
expr: `1 + 2 == (3)`,
tokens: []token{
{typ: integer, val: "1"},
{typ: ident, val: "+"},
{typ: integer, val: "2"},
{typ: ident, val: "=="},
{typ: lParen, val: "("},
{typ: integer, val: "3"},
{typ: rParen, val: ")"},
},
cc: NewConfig(EnableInfixNotation),
},
{
expr: `a & !b == c`,
tokens: []token{
{typ: ident, val: "a"},
{typ: ident, val: "&"},
{typ: ident, val: "!"},
{typ: ident, val: "b"},
{typ: ident, val: "=="},
{typ: ident, val: "c"},
},
cc: NewConfig(EnableInfixNotation),
},
{
expr: `1 + 2 == -3`,
tokens: []token{
{typ: integer, val: "1"},
{typ: ident, val: "+"},
{typ: integer, val: "2"},
{typ: ident, val: "=="},
{typ: integer, val: "-3"},
},
cc: NewConfig(EnableInfixNotation),
},
{
expr: `!a != !b != !c`,
tokens: []token{
{typ: ident, val: "!"},
{typ: ident, val: "a"},
{typ: ident, val: "!="},
{typ: ident, val: "!"},
{typ: ident, val: "b"},
{typ: ident, val: "!="},
{typ: ident, val: "!"},
{typ: ident, val: "c"},
},
cc: NewConfig(EnableInfixNotation),
},
{
expr: `!a`,
tokens: []token{
{typ: ident, val: "!"},
{typ: ident, val: "a"},
},
cc: NewConfig(EnableInfixNotation),
},
{
expr: `!and(a, b, c)`,
tokens: []token{
{typ: ident, val: "!"},
{typ: ident, val: "and"},
{typ: lParen, val: "("},
{typ: ident, val: "a"},
{typ: comma, val: ","},
{typ: ident, val: "b"},
{typ: comma, val: ","},
{typ: ident, val: "c"},
{typ: rParen, val: ")"},
},
cc: NewConfig(EnableInfixNotation),
},
{
expr: `!true`,
tokens: []token{
{typ: ident, val: "!"},
{typ: ident, val: "true"},
},
cc: NewConfig(EnableInfixNotation),
},
{
expr: `!false`,
tokens: []token{
{typ: ident, val: "!"},
{typ: ident, val: "false"},
},
cc: NewConfig(EnableInfixNotation),
},
{
expr: `!!a`,
cc: NewConfig(EnableInfixNotation),
errMsg: "can not parse token",
},
{
expr: `!!`,
cc: NewConfig(EnableInfixNotation),
tokens: []token{
{typ: ident, val: "!"},
{typ: ident, val: "!"},
},
},
{
expr: `!!!`,
cc: NewConfig(EnableInfixNotation),
errMsg: "can not parse token",
},
{
expr: `a!`,
cc: NewConfig(EnableInfixNotation),
errMsg: "can not parse token",
},
{
expr: `a >= 8 && !(b && !e) && mod(c + 6 * f, 10) == 7`,
cc: NewConfig(EnableInfixNotation),
tokens: []token{
{typ: ident, val: "a"},
{typ: ident, val: ">="},
{typ: integer, val: "8"},
{typ: ident, val: "&&"},
{typ: ident, val: "!"},
{typ: lParen, val: "("},
{typ: ident, val: "b"},
{typ: ident, val: "&&"},
{typ: ident, val: "!"},
{typ: ident, val: "e"},
{typ: rParen, val: ")"},
{typ: ident, val: "&&"},
{typ: ident, val: "mod"},
{typ: lParen, val: "("},
{typ: ident, val: "c"},
{typ: ident, val: "+"},
{typ: integer, val: "6"},
{typ: ident, val: "*"},
{typ: ident, val: "f"},
{typ: comma, val: ","},
{typ: integer, val: "10"},
{typ: rParen, val: ")"},
{typ: ident, val: "=="},
{typ: integer, val: "7"},
},
},
{
expr: `(and ()`,
tokens: []token{
{typ: lParen, val: "("},
{typ: ident, val: "and"},
{typ: lParen, val: "("},
{typ: rParen, val: ")"},
},
},
{
expr: `(+ -1 1)`,
tokens: []token{
{typ: lParen, val: "("},
{typ: ident, val: "+"},
{typ: integer, val: "-1"},
{typ: integer, val: "1"},
{typ: rParen, val: ")"},
},
},
{
expr: `(math.Sub startDate.Year user.Birthdate.Year)`,
tokens: []token{
{typ: lParen, val: "("},
{typ: ident, val: "math.Sub"},
{typ: ident, val: "startDate.Year"},
{typ: ident, val: "user.Birthdate.Year"},
{typ: rParen, val: ")"},
},
},
{
expr: `
;; expr start
(+ ;; add
1 1 ;; numbers
) ;; expr end
;; new line comment
`,
tokens: []token{
{typ: comment, val: ";; expr start"},
{typ: lParen, val: "("},
{typ: ident, val: "+"},
{typ: comment, val: ";; add"},
{typ: integer, val: "1"},
{typ: integer, val: "1"},
{typ: comment, val: ";; numbers"},
{typ: rParen, val: ")"},
{typ: comment, val: ";; expr end"},
{typ: comment, val: ";; new line comment"},
},
},
{
expr: `
(<
(+ 1
(- 2 v3) (/ -6 3) 4)
(* 5 6 7)
)`,
tokens: []token{
{typ: lParen, val: "("},
{typ: ident, val: "<"},
{typ: lParen, val: "("},
{typ: ident, val: "+"},
{typ: integer, val: "1"},
{typ: lParen, val: "("},
{typ: ident, val: "-"},
{typ: integer, val: "2"},
{typ: ident, val: "v3"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "/"},
{typ: integer, val: "-6"},
{typ: integer, val: "3"},
{typ: rParen, val: ")"},
{typ: integer, val: "4"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "*"},
{typ: integer, val: "5"},
{typ: integer, val: "6"},
{typ: integer, val: "7"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"}},
},
{
expr: `
(if
(<= age 3)
"👋~ 👶" ;; we can use emoji in string and comments 🤪
(if
(or
(in language ("zh" "zh-CN"))
(= country "CN"))
"你好"
"hello"))`,
tokens: []token{
{typ: lParen, val: "("},
{typ: ident, val: "if"},
{typ: lParen, val: "("},
{typ: ident, val: "<="},
{typ: ident, val: "age"},
{typ: integer, val: "3"},
{typ: rParen, val: ")"},
{typ: str, val: "👋~ 👶"},
{typ: comment, val: ";; we can use emoji in string and comments 🤪"},
{typ: lParen, val: "("},
{typ: ident, val: "if"},
{typ: lParen, val: "("},
{typ: ident, val: "or"},
{typ: lParen, val: "("},
{typ: ident, val: "in"},
{typ: ident, val: "language"},
{typ: lParen, val: "("},
{typ: str, val: "zh"},
{typ: str, val: "zh-CN"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "="},
{typ: ident, val: "country"},
{typ: str, val: "CN"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: str, val: "你好"},
{typ: str, val: "hello"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
},
},
{
expr: `(=(now)123)`,
tokens: []token{
{typ: lParen, val: "("},
{typ: ident, val: "="},
{typ: lParen, val: "("},
{typ: ident, val: "now"},
{typ: rParen, val: ")"},
{typ: integer, val: "123"},
{typ: rParen, val: ")"},
},
},
{
expr: `(now)`,
tokens: []token{
{typ: lParen, val: "("},
{typ: ident, val: "now"},
{typ: rParen, val: ")"},
},
},
{
expr: `(< age 18.0)`, // can not parse float
errMsg: "can not parse token",
},
{
expr: `(+ 1 1.0)`, // can not parse float
errMsg: "can not parse token",
},
{
expr: `(add* 1)`, // `add*` contains special character
errMsg: "can not parse token",
},
{
expr: `(= abc 0cc)`, // `0cc` is invalid
errMsg: "can not parse token",
},
{
expr: `test abc abc_1`,
tokens: []token{
{typ: ident, val: "test"},
{typ: ident, val: "abc"},
{typ: ident, val: "abc_1"},
},
},
{
expr: `1 + 2`,
tokens: []token{
{typ: integer, val: "1"},
{typ: ident, val: "+"},
{typ: integer, val: "2"},
},
cc: NewConfig(EnableInfixNotation),
},
{
expr: `""`,
tokens: []token{
{typ: str, val: ""},
},
},
{
expr: `"`,
errMsg: "unclosed quotes",
},
{
expr: `!3`,
errMsg: "can not parse token",
},
{
expr: `(math.Sub. 1 2)`,
errMsg: "can not parse token",
},
{
expr: `(- .def 2)`,
errMsg: "can not parse token",
},
{
expr: `(- def. 2)`,
errMsg: "can not parse token",
},
{
expr: `(- d..f 2)`,
errMsg: "can not parse token",
},
// complicated expression with a messy format
{
expr: `
;;;; optimize:false
;;;; hhhh
(or ;; test
(eq
(= 1 1)
(= 1 2)
(eq
(= 1 1)
(= 1 2)
(= 1 1)
(= 1 1)))
(and
;; hhhhh3
(between age 18 -80)
(eq (+ 1 1) (- 3 1 ) 2)
(eq gender "male") ;; heheda
(between;;hhhh4
(t_version app_version) ( t_version "1.2.3") (t_version "4.5")
)
)
(= (now) 123)
(in "" ())
(=(now)123)
(now)
(overlap () (1 2 3))
(overlap ("a" ) (""))
;; hhhh5
(overlap groups (1234 7680 )) ;; todo
(;; hehehe
overlap
;; heheh6
;; hhh 7
tags ( "bbb" "aaa"))
;; hhhh8
) ;; hhh9
;; hhh0
`,
tokens: []token{
{typ: comment, val: ";;;; optimize:false"},
{typ: comment, val: ";;;; hhhh"},
{typ: lParen, val: "("},
{typ: ident, val: "or"},
{typ: comment, val: ";; test"},
{typ: lParen, val: "("},
{typ: ident, val: "eq"},
{typ: lParen, val: "("},
{typ: ident, val: "="},
{typ: integer, val: "1"},
{typ: integer, val: "1"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "="},
{typ: integer, val: "1"},
{typ: integer, val: "2"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "eq"},
{typ: lParen, val: "("},
{typ: ident, val: "="},
{typ: integer, val: "1"},
{typ: integer, val: "1"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "="},
{typ: integer, val: "1"},
{typ: integer, val: "2"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "="},
{typ: integer, val: "1"},
{typ: integer, val: "1"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "="},
{typ: integer, val: "1"},
{typ: integer, val: "1"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "and"},
{typ: comment, val: ";; hhhhh3"},
{typ: lParen, val: "("},
{typ: ident, val: "between"},
{typ: ident, val: "age"},
{typ: integer, val: "18"},
{typ: integer, val: "-80"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "eq"},
{typ: lParen, val: "("},
{typ: ident, val: "+"},
{typ: integer, val: "1"},
{typ: integer, val: "1"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "-"},
{typ: integer, val: "3"},
{typ: integer, val: "1"},
{typ: rParen, val: ")"},
{typ: integer, val: "2"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "eq"},
{typ: ident, val: "gender"},
{typ: str, val: "male"},
{typ: rParen, val: ")"},
{typ: comment, val: ";; heheda"},
{typ: lParen, val: "("},
{typ: ident, val: "between"},
{typ: comment, val: ";;hhhh4"},
{typ: lParen, val: "("},
{typ: ident, val: "t_version"},
{typ: ident, val: "app_version"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "t_version"},
{typ: str, val: "1.2.3"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "t_version"},
{typ: str, val: "4.5"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "="},
{typ: lParen, val: "("},
{typ: ident, val: "now"},
{typ: rParen, val: ")"},
{typ: integer, val: "123"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "in"},
{typ: str, val: ""},
{typ: lParen, val: "("},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "="},
{typ: lParen, val: "("},
{typ: ident, val: "now"},
{typ: rParen, val: ")"},
{typ: integer, val: "123"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "now"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "overlap"},
{typ: lParen, val: "("},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: integer, val: "1"},
{typ: integer, val: "2"},
{typ: integer, val: "3"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: ident, val: "overlap"},
{typ: lParen, val: "("},
{typ: str, val: "a"},
{typ: rParen, val: ")"},
{typ: lParen, val: "("},
{typ: str, val: ""},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: comment, val: ";; hhhh5"},
{typ: lParen, val: "("},
{typ: ident, val: "overlap"},
{typ: ident, val: "groups"},
{typ: lParen, val: "("},
{typ: integer, val: "1234"},
{typ: integer, val: "7680"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: comment, val: ";; todo"},
{typ: lParen, val: "("},
{typ: comment, val: ";; hehehe"},
{typ: ident, val: "overlap"},
{typ: comment, val: ";; heheh6"},
{typ: comment, val: ";; hhh 7"},
{typ: ident, val: "tags"},
{typ: lParen, val: "("},
{typ: str, val: "bbb"},
{typ: str, val: "aaa"},
{typ: rParen, val: ")"},
{typ: rParen, val: ")"},
{typ: comment, val: ";; hhhh8"},
{typ: rParen, val: ")"},
{typ: comment, val: ";; hhh9"},
{typ: comment, val: ";; hhh0"},
},
},
}
for _, c := range testCases {
t.Run(c.expr, func(t *testing.T) {
p := newParser(c.cc, c.expr)
err := p.lex()
if len(c.errMsg) != 0 {
assertErrStrContains(t, err, c.errMsg, c)
return
}
assertNil(t, err, c)
assertEquals(t, len(p.tokens), len(c.tokens))
for i := range p.tokens {
t1 := p.tokens[i]
t2 := c.tokens[i]
assertEquals(t, t1.typ, t2.typ)
assertEquals(t, t1.val, t2.val)
}
})
}
}
func TestParseConfig(t *testing.T) {
testCases := []struct {
expr string
origin map[CompileOption]bool
want map[CompileOption]bool
errMsg string
}{
{
expr: `(+ 1 1)`,
origin: map[CompileOption]bool{},
want: map[CompileOption]bool{},
},
{
expr: `;;;; constant_folding: true, reordering: true`,
origin: map[CompileOption]bool{},
want: map[CompileOption]bool{
Reordering: true,
ConstantFolding: true,
},
},
{
expr: `;;;; optimize:false`,
origin: map[CompileOption]bool{
Reordering: true,
FastEvaluation: true,
ConstantFolding: true,
},
want: map[CompileOption]bool{
Reordering: false,
FastEvaluation: false,
ConstantFolding: false,
},
},
{
expr: `
;; disable all optimization first
;;;; optimize: false
;; then only enable reordering and constant_folding
;;;; reordering: true, constant_folding: true
`,
origin: map[CompileOption]bool{
Reordering: true,
FastEvaluation: true,
ConstantFolding: true,
},
want: map[CompileOption]bool{
Reordering: true,
FastEvaluation: false,
ConstantFolding: true,
},
},
{
expr: `;;;;unsupported_option:false`,
origin: map[CompileOption]bool{
Reordering: true,
FastEvaluation: true,
ConstantFolding: true,
},
errMsg: "unsupported compile config",
},
{
expr: `;;;;reordering:disabled`,
origin: map[CompileOption]bool{
Reordering: true,
FastEvaluation: true,
ConstantFolding: true,
},
errMsg: "invalid config value",
},
{
expr: `;;;;reordering:false:false`,
origin: map[CompileOption]bool{
Reordering: true,
FastEvaluation: true,
ConstantFolding: true,
},
errMsg: "invalid compile format",
},
}
for _, c := range testCases {
t.Run(c.expr, func(t *testing.T) {
p := newParser(&Config{CompileOptions: c.origin}, c.expr)
err := p.lex()
assertNil(t, err, c)
err = p.parseConfig()
if len(c.errMsg) != 0 {
assertErrStrContains(t, err, c.errMsg, c)
return
}
assertNil(t, err, c)
updatedOption := p.conf.CompileOptions
for option, want := range c.want {
got, exist := updatedOption[option]
assertEquals(t, exist, true)
assertEquals(t, got, want)
}
})
}
}
func TestParseAstTree(t *testing.T) {
testCases := []struct {
cc *Config
expr string
ast verifyNode
errMsg string
}{
{
expr: `(+ 1 1)`,
ast: verifyNode{
tpy: operator,
data: "+",
children: []verifyNode{
{tpy: constant, data: int64(1)},
{tpy: constant, data: int64(1)},
},
},
},
{
expr: `(math.Abs 1 abc.def.ijk)`,
cc: NewConfig(RegVarAndOp(map[string]interface{}{
"math.Abs": Operator(nil), // just a placeholder
"abc.def.ijk": -1,
})),
ast: verifyNode{
tpy: operator,
data: "math.Abs",
children: []verifyNode{
{tpy: constant, data: int64(1)},
{tpy: variable, data: "abc.def.ijk"},
},
},
},
{
expr: `
(<
(+ 1
(- 2 v3) (/ -6 3) 4)
(* 5 6 7)
)`,
cc: &Config{
VariableKeyMap: map[string]VariableKey{
"v3": VariableKey(3),
},
},
ast: verifyNode{
tpy: operator,
data: "<",
children: []verifyNode{
{
tpy: operator,
data: "+",
children: []verifyNode{
{tpy: constant, data: int64(1)},
{
tpy: operator,
data: "-",
children: []verifyNode{
{tpy: constant, data: int64(2)},
{tpy: variable, data: "v3", variableKey: VariableKey(3)},
},
},
{
tpy: operator,
data: "/",
children: []verifyNode{
{tpy: constant, data: int64(-6)},
{tpy: constant, data: int64(3)},
},
},
{tpy: constant, data: int64(4)},
},
},
{
tpy: operator,
data: "*",
children: []verifyNode{
{tpy: constant, data: int64(5)},
{tpy: constant, data: int64(6)},
{tpy: constant, data: int64(7)},
},
},
},
},
},
{
// with special character (emoji, chinese character)
cc: &Config{
VariableKeyMap: map[string]VariableKey{
"age": VariableKey(1),
"language": VariableKey(2),
"country": VariableKey(3),
},
},
expr: `
(if
(<= age 3)
"👋~ 👶" ;; we can use emoji in string and comments 🤪
(if
(or
(in language ("zh" "zh-CN"))
(= country "CN"))
"你好"
"hello"))`,
ast: verifyNode{
tpy: cond,
data: keywordIf,
children: []verifyNode{
{
tpy: operator,
data: "<=",
children: []verifyNode{
{tpy: variable, data: "age", variableKey: VariableKey(1)},
{tpy: constant, data: int64(3)},
},
},
{tpy: constant, data: "👋~ 👶"},
{
tpy: cond,
data: keywordIf,
children: []verifyNode{
{
tpy: operator,
data: "or",
children: []verifyNode{
{
tpy: operator,
data: "in",
children: []verifyNode{
{tpy: variable, data: "language", variableKey: VariableKey(2)},
{tpy: constant, data: []string{"zh", "zh-CN"}},
},
},
{
tpy: operator,
data: "=",
children: []verifyNode{
{tpy: variable, data: "country", variableKey: VariableKey(3)},
{tpy: constant, data: "CN"},
},
},
},
},
{tpy: constant, data: "你好"},
{tpy: constant, data: "hello"},
{tpy: cond, data: "fi"},
},
},
{tpy: cond, data: "fi"},
},
},
},
// with custom operator and variable and constant
{
cc: &Config{
VariableKeyMap: map[string]VariableKey{
"birthday": VariableKey(3),
},
ConstantMap: map[string]Value{
"birthdate_format": "Jan 02, 2006",
},
OperatorMap: map[string]Operator{
"is_child": func(_ *Ctx, params []Value) (Value, error) {
const (
op = "is_child"
timeYear = time.Hour * 24 * 365
)
if len(params) != 1 {
return nil, ParamsCountError(op, 1, len(params))
}
birthday, ok := params[0].(string)
if !ok {
return nil, ParamTypeError(op, typeStr, params[0])
}
layout, ok := params[1].(string)
if !ok {
return nil, ParamTypeError(op, typeStr, params[1])
}
birthTime, err := time.Parse(layout, birthday)
if err != nil {
return nil, OpExecError(op, err)
}
age := int64(time.Now().Sub(birthTime) / timeYear)
return age < 18, nil
},
},