README
¶
expr
import "github.com/GeoNet/delta/internal/expr"
Overview
Package expr provides helpful conversion of mathematic expressions to base types.
The goal of this package is to behave in a similar manner to the strconv package for numerical type conversion.
It allows for code like this:
v, err := ToFloat64("1.0 + 1.0")
// v == 2.0
Index
- Variables
- func ToBool(s string) (bool, error)
- func ToComplex128(s string) (complex128, error)
- func ToComplex64(s string) (complex64, error)
- func ToFloat32(s string) (float32, error)
- func ToFloat64(s string) (float64, error)
- func ToInt(s string) (int, error)
- func ToInt64(s string) (int64, error)
- func ToString(s string) (string, error)
- func ToUint(s string) (uint, error)
- func ToUint64(s string) (uint64, error)
Package files
Variables
var ErrEvalIsUnknown = errors.New("expression is unknown")
var ErrEvalNotBool = errors.New("expression does not return a bool expression")
var ErrEvalNotComplex = errors.New("expression does not return a complex expression")
var ErrEvalNotFloat = errors.New("expression does not return a float expression")
var ErrEvalNotInt = errors.New("expression does not return an int expression")
var ErrEvalNotString = errors.New("expression does not return a string expression")
func ToBool
func ToBool(s string) (bool, error)
ToBool evaluates the given string as a bool, or it returns an error if the expression is Unknown.
func ToComplex128
func ToComplex128(s string) (complex128, error)
ToComplex128 evaluates the given string as a complex value, or it returns an error if the expression is Unknown.
func ToComplex64
func ToComplex64(s string) (complex64, error)
ToComplex64 evaluates the given string as a complex value, or it returns an error if the expression is Unknown.
func ToFloat32
func ToFloat32(s string) (float32, error)
ToFloat32 evaluates the given string as a float32, or it returns an error if the result is invalid or the expression is Unknown.
func ToFloat64
func ToFloat64(s string) (float64, error)
ToFloat64 evaluates the given string as a float64, or it returns an error if the result is invalid or the expression is Unknown.
func ToInt
func ToInt(s string) (int, error)
ToInt evaluates the given string as an int, or it returns an error if the result is invalid or the expression is Unknown.
func ToInt64
func ToInt64(s string) (int64, error)
ToInt64 evaluates the given string as an int64, or it returns an error if the result is invalid or the expression is Unknown.
func ToString
func ToString(s string) (string, error)
ToString evaluates the given string as a string, or it returns an error if the expression is Unknown.
func ToUint
func ToUint(s string) (uint, error)
ToUint evaluates the given string as a uint, or it returns an error if the result is invalid or the expression is Unknown.
func ToUint64
func ToUint64(s string) (uint64, error)
ToUint64 evaluates the given string as an uint64, or it returns an error if the result is invalid or the expression is Unknown.
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Documentation
¶
Overview ¶
Package expr provides helpful conversion of mathematic expressions to base types.
The goal of this package is to behave in a similar manner to the strconv package for numerical type conversion.
It allows for code like this:
v, err := ToFloat64("1.0 + 1.0")
// v == 2.0
Index ¶
- Variables
- func ToBool(s string) (bool, error)
- func ToComplex128(s string) (complex128, error)
- func ToComplex64(s string) (complex64, error)
- func ToFloat32(s string) (float32, error)
- func ToFloat64(s string) (float64, error)
- func ToInt(s string) (int, error)
- func ToInt64(s string) (int64, error)
- func ToString(s string) (string, error)
- func ToUint(s string) (uint, error)
- func ToUint64(s string) (uint64, error)
Constants ¶
This section is empty.
Variables ¶
var ErrEvalIsUnknown = errors.New("expression is unknown")
var ErrEvalNotBool = errors.New("expression does not return a bool expression")
var ErrEvalNotComplex = errors.New("expression does not return a complex expression")
var ErrEvalNotFloat = errors.New("expression does not return a float expression")
var ErrEvalNotInt = errors.New("expression does not return an int expression")
var ErrEvalNotString = errors.New("expression does not return a string expression")
Functions ¶
func ToBool ¶
ToBool evaluates the given string as a bool, or it returns an error if the expression is Unknown.
func ToComplex128 ¶
func ToComplex128(s string) (complex128, error)
ToComplex128 evaluates the given string as a complex value, or it returns an error if the expression is Unknown.
func ToComplex64 ¶
ToComplex64 evaluates the given string as a complex value, or it returns an error if the expression is Unknown.
func ToFloat32 ¶
ToFloat32 evaluates the given string as a float32, or it returns an error if the result is invalid or the expression is Unknown.
func ToFloat64 ¶
ToFloat64 evaluates the given string as a float64, or it returns an error if the result is invalid or the expression is Unknown.
func ToInt ¶
ToInt evaluates the given string as an int, or it returns an error if the result is invalid or the expression is Unknown.
func ToInt64 ¶
ToInt64 evaluates the given string as an int64, or it returns an error if the result is invalid or the expression is Unknown.
func ToString ¶
ToString evaluates the given string as a string, or it returns an error if the expression is Unknown.
Types ¶
This section is empty.
Source Files