conds

README

conds

cond is a tiny builder of where clause conditions.

Installation

go get github.com/winebarrel/conds

Usage

package main

import (
	"fmt"

	c "github.com/winebarrel/conds"
)

func main() {
	n := 100
	s := "foo"
	var nilstr *string
	var nilnum *int

	w := c.
		C("num = @n", c.V("n", n)).
		AND_C("str = @s", c.V("s", s)).
		// XV: Null value conditions are removed
		AND_C("sval = @ns", c.XV("ns", nilstr)).

	stmt, params := w.StmtParams()

	fmt.Println(stmt)   //=> "num = @n AND str = @s"
	fmt.Println(params) //=> map[n:100 nn:<nil> s:foo]
}

Documentation

Index

• func IF[T any](expr bool, cthen, celse T) T
• func IFF[T any](expr bool, f func() T) T
• func IFTHEN[T any](expr bool, cthen T) T
• func StmtParams[T ~map[string]any](c Condition) (string, T)
• type Condition
  • func AND(conditions ...Condition) Condition
  • func C(stmt string, nvs ...NamedValue) Condition
  • func Empty() Condition
  • func NonNil[T any](param *T, f func(T) Condition) Condition
  • func NonZero[T comparable](param T, f func(T) Condition) Condition
  • func OR(others ...Condition) Condition
  • func (c Condition) AND(other Condition) Condition
  • func (c Condition) AND_C(stmt string, nvs ...NamedValue) Condition
  • func (c Condition) Empty() bool
  • func (c Condition) Enclose() Condition
  • func (c Condition) OR(other Condition) Condition
  • func (c Condition) OR_C(stmt string, nvs ...NamedValue) Condition
  • func (c Condition) StmtParams() (string, map[string]any)
• type NamedValue
  • func V(name string, value any) NamedValue
  • func VMap(m map[string]any) []NamedValue
  • func XV[T any](name string, value *T) NamedValue

Functions

func IF

func IF[T any](expr bool, cthen, celse T) T

func IFF

func IFF[T any](expr bool, f func() T) T

func IFTHEN

func IFTHEN[T any](expr bool, cthen T) T

func StmtParams

func StmtParams[T ~map[string]any](c Condition) (string, T)

Types

type Condition

type Condition struct {
	// contains filtered or unexported fields
}

func AND

func AND(conditions ...Condition) Condition

func C

func C(stmt string, nvs ...NamedValue) Condition

func Empty

func Empty() Condition

func NonNil

func NonNil[T any](param *T, f func(T) Condition) Condition

func NonZero

func NonZero[T comparable](param T, f func(T) Condition) Condition

func OR

func OR(others ...Condition) Condition

func (Condition) AND

func (c Condition) AND(other Condition) Condition

func (Condition) AND_C

func (c Condition) AND_C(stmt string, nvs ...NamedValue) Condition

func (Condition) Empty

func (c Condition) Empty() bool

func (Condition) Enclose

func (c Condition) Enclose() Condition

func (Condition) OR

func (c Condition) OR(other Condition) Condition

func (Condition) OR_C

func (c Condition) OR_C(stmt string, nvs ...NamedValue) Condition

func (Condition) StmtParams

func (c Condition) StmtParams() (string, map[string]any)

type NamedValue

type NamedValue struct {
	// contains filtered or unexported fields
}

func V

func V(name string, value any) NamedValue

func VMap

func VMap(m map[string]any) []NamedValue

func XV

func XV[T any](name string, value *T) NamedValue