tools/src/cnf/format.go

// Copyright 2023 The Dawn & Tint Authors
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package cnf

import (
	"strings"

	"dawn.googlesource.com/dawn/tools/src/transform"
)

// String returns the expression in a C-like syntax
func (e Expr) String() string {
	return e.Format(" && ", " || ", "!")
}

// String returns the expression in a C-like syntax
func (o Ors) String() string {
	return o.Format(" || ", "!")
}

// String returns the expression in a C-like syntax
func (u Unary) String() string {
	return u.Format("!")
}

// Format returns the expression using the provided operators
func (e Expr) Format(and, or, not string) string {
	parts, _ := transform.Slice(e, func(ors Ors) (string, error) {
		if len(e) > 1 && len(ors) > 1 {
			return "(" + ors.Format(or, not) + ")", nil
		}
		return ors.Format(or, not), nil
	})
	return strings.Join(parts, and)
}

// Format returns the expression using the provided operators
func (o Ors) Format(or, not string) string {
	parts, _ := transform.Slice(o, func(u Unary) (string, error) {
		return u.Format(not), nil
	})
	return strings.Join(parts, or)
}

// Format returns the expression using the provided operator
func (u Unary) Format(not string) string {
	if u.Negate {
		return "(" + not + u.Var + ")"
	}
	return u.Var
}