♻️ New calculator pending to replace math_expressions
This commit is contained in:
539
lib/calculator.dart
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539
lib/calculator.dart
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// === 在 abstract class Expr 中添加声明 ===
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import 'dart:math' show sqrt, cos, sin, tan;
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abstract class Expr {
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Expr simplify();
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/// 新增：对表达式进行“求值/数值化”——尽可能把可算的部分算出来
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Expr evaluate();
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@override
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String toString();
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MulExpr operator *(Expr other) => MulExpr(this, other);
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AddExpr operator +(Expr other) => AddExpr(this, other);
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SubExpr operator -(Expr other) => SubExpr(this, other);
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DivExpr operator /(Expr other) => DivExpr(this, other);
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}
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// === IntExpr ===
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class IntExpr extends Expr {
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final int value;
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IntExpr(this.value);
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@override
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Expr simplify() => this;
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@override
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Expr evaluate() => this;
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@override
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String toString() => value.toString();
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}
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// === DoubleExpr ===
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class DoubleExpr extends Expr {
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final double value;
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DoubleExpr(this.value);
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@override
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Expr simplify() => this;
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@override
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Expr evaluate() => this;
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@override
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String toString() => value.toString();
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}
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// === FractionExpr.evaluate ===
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class FractionExpr extends Expr {
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final int numerator;
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final int denominator;
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FractionExpr(this.numerator, this.denominator) {
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if (denominator == 0) throw Exception("分母不能为0");
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}
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@override
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Expr simplify() {
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int g = _gcd(numerator.abs(), denominator.abs());
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int n = numerator ~/ g;
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int d = denominator ~/ g;
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// 分母负数转移到分子
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if (d < 0) {
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n = -n;
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d = -d;
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}
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if (d == 1) return IntExpr(n); // 化简成整数
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return FractionExpr(n, d);
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}
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@override
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Expr evaluate() => simplify();
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@override
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String toString() => "$numerator/$denominator";
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}
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// === AddExpr.evaluate: 把可算的合并（整数、分数、以及同类 sqrt 项） ===
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class AddExpr extends Expr {
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final Expr left, right;
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AddExpr(this.left, this.right);
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@override
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Expr simplify() {
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var l = left.simplify();
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var r = right.simplify();
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if (l is FractionExpr && r is FractionExpr) {
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return FractionExpr(
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l.numerator * r.denominator + r.numerator * l.denominator,
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l.denominator * r.denominator,
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).simplify();
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}
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if (l is IntExpr && r is FractionExpr) {
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return FractionExpr(
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l.value * r.denominator + r.numerator,
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r.denominator,
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).simplify();
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}
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if (l is FractionExpr && r is IntExpr) {
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return FractionExpr(
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l.numerator + r.value * l.denominator,
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l.denominator,
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).simplify();
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}
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return AddExpr(l, r);
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}
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@override
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Expr evaluate() {
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var l = left.evaluate();
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var r = right.evaluate();
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// 纯整数相加 -> 整数
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if (l is IntExpr && r is IntExpr) {
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return IntExpr(l.value + r.value);
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}
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// 分数相加 / 分数与整数相加
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if (l is FractionExpr && r is FractionExpr) {
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return FractionExpr(
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l.numerator * r.denominator + r.numerator * l.denominator,
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l.denominator * r.denominator,
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).simplify();
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}
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if (l is IntExpr && r is FractionExpr) {
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return FractionExpr(
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l.value * r.denominator + r.numerator,
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r.denominator,
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).simplify();
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}
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if (l is FractionExpr && r is IntExpr) {
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return FractionExpr(
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l.numerator + r.value * l.denominator,
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l.denominator,
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).simplify();
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}
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// 合并同类的 sqrt 项: a*sqrt(X) + b*sqrt(X) = (a+b)*sqrt(X)
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var a = _asSqrtTerm(l);
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var b = _asSqrtTerm(r);
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if (a != null && b != null && a.inner.toString() == b.inner.toString()) {
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return MulExpr(IntExpr(a.coef + b.coef), SqrtExpr(a.inner)).simplify();
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}
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return AddExpr(l, r);
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}
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@override
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String toString() => "($left + $right)";
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}
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// === SubExpr.evaluate 类似 AddExpr，但做减法 ===
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class SubExpr extends Expr {
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final Expr left, right;
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SubExpr(this.left, this.right);
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@override
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Expr simplify() {
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var l = left.simplify();
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var r = right.simplify();
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if (l is IntExpr && r is IntExpr) {
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return IntExpr(l.value - r.value);
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}
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if (l is FractionExpr && r is FractionExpr) {
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return FractionExpr(
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l.numerator * r.denominator - r.numerator * l.denominator,
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l.denominator * r.denominator,
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).simplify();
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}
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return SubExpr(l, r);
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}
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@override
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Expr evaluate() {
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var l = left.evaluate();
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var r = right.evaluate();
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if (l is IntExpr && r is IntExpr) {
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return IntExpr(l.value - r.value);
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}
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if (l is FractionExpr && r is FractionExpr) {
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return FractionExpr(
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l.numerator * r.denominator - r.numerator * l.denominator,
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l.denominator * r.denominator,
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).simplify();
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}
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if (l is IntExpr && r is FractionExpr) {
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return FractionExpr(
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l.value * r.denominator - r.numerator,
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r.denominator,
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).simplify();
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}
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if (l is FractionExpr && r is IntExpr) {
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return FractionExpr(
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l.numerator - r.value * l.denominator,
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l.denominator,
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).simplify();
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}
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// 处理同类 sqrt 项: a*sqrt(X) - b*sqrt(X) = (a-b)*sqrt(X)
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var a = _asSqrtTerm(l);
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var b = _asSqrtTerm(r);
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if (a != null && b != null && a.inner.toString() == b.inner.toString()) {
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return MulExpr(IntExpr(a.coef - b.coef), SqrtExpr(a.inner)).simplify();
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}
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return SubExpr(l, r);
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}
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@override
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String toString() => "($left - $right)";
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}
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// === MulExpr.evaluate ===
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class MulExpr extends Expr {
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final Expr left, right;
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MulExpr(this.left, this.right);
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@override
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Expr simplify() {
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var l = left.simplify();
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var r = right.simplify();
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if (l is IntExpr && l.value == 1) return r;
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if (r is IntExpr && r.value == 1) return l;
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if (l is IntExpr && l.value == -1) return SubExpr(IntExpr(0), r).simplify();
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if (r is IntExpr && r.value == -1) return SubExpr(IntExpr(0), l).simplify();
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if (l is IntExpr && r is IntExpr) {
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return IntExpr(l.value * r.value);
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}
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if (l is FractionExpr && r is IntExpr) {
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return FractionExpr(l.numerator * r.value, l.denominator).simplify();
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}
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if (l is IntExpr && r is FractionExpr) {
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return FractionExpr(l.value * r.numerator, r.denominator).simplify();
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}
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if (l is FractionExpr && r is FractionExpr) {
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return FractionExpr(
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l.numerator * r.numerator,
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l.denominator * r.denominator,
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).simplify();
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}
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if (l is SqrtExpr && r is FractionExpr) {
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return FractionExpr(1, r.denominator).simplify() *
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MulExpr(l, IntExpr(r.numerator)).simplify();
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}
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return MulExpr(l, r);
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}
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@override
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Expr evaluate() {
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var l = left.evaluate();
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var r = right.evaluate();
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if (l is IntExpr && l.value == 1) return r;
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if (r is IntExpr && r.value == 1) return l;
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if (l is IntExpr && l.value == -1) return SubExpr(IntExpr(0), r).simplify();
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if (r is IntExpr && r.value == -1) return SubExpr(IntExpr(0), l).simplify();
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if (l is IntExpr && r is IntExpr) {
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return IntExpr(l.value * r.value);
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}
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if (l is FractionExpr && r is IntExpr) {
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return FractionExpr(l.numerator * r.value, l.denominator).simplify();
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}
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if (l is IntExpr && r is FractionExpr) {
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return FractionExpr(l.value * r.numerator, r.denominator).simplify();
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}
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if (l is FractionExpr && r is FractionExpr) {
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return FractionExpr(
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l.numerator * r.numerator,
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l.denominator * r.denominator,
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).simplify();
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}
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// sqrt * sqrt: sqrt(a)*sqrt(a) = a
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if (l is SqrtExpr &&
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r is SqrtExpr &&
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l.inner.toString() == r.inner.toString()) {
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return l.inner.simplify();
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}
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// int * sqrt -> 保留形式，之后 simplify() 再处理约分
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if ((l is IntExpr && r is SqrtExpr) || (l is SqrtExpr && r is IntExpr)) {
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return MulExpr(l, r).simplify();
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}
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return MulExpr(l, r);
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}
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@override
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String toString() => "($left * $right)";
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}
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// === DivExpr.evaluate ===
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class DivExpr extends Expr {
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final Expr left, right;
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DivExpr(this.left, this.right);
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@override
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Expr simplify() {
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var l = left.simplify();
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var r = right.simplify();
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if (l is IntExpr && r is IntExpr) {
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return FractionExpr(l.value, r.value).simplify();
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}
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if (l is FractionExpr && r is IntExpr) {
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return FractionExpr(l.numerator, l.denominator * r.value).simplify();
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}
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if (l is IntExpr && r is FractionExpr) {
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return FractionExpr(l.value * r.denominator, r.numerator).simplify();
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}
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if (l is FractionExpr && r is FractionExpr) {
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return FractionExpr(
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l.numerator * r.denominator,
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l.denominator * r.numerator,
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).simplify();
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}
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if (l is MulExpr &&
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l.left is IntExpr &&
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l.right is SqrtExpr &&
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r is IntExpr) {
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int coeff = (l.left as IntExpr).value;
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int denom = r.value;
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int g = _gcd(coeff.abs(), denom.abs());
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return MulExpr(
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IntExpr(coeff ~/ g),
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DivExpr(l.right, IntExpr(denom ~/ g)).simplify(),
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).simplify();
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}
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return DivExpr(l, r);
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}
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@override
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Expr evaluate() {
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var l = left.evaluate();
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var r = right.evaluate();
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if (l is IntExpr && r is IntExpr) {
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return FractionExpr(l.value, r.value).simplify();
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}
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if (l is FractionExpr && r is IntExpr) {
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return FractionExpr(l.numerator, l.denominator * r.value).simplify();
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}
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if (l is IntExpr && r is FractionExpr) {
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return FractionExpr(l.value * r.denominator, r.numerator).simplify();
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}
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if (l is FractionExpr && r is FractionExpr) {
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return FractionExpr(
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l.numerator * r.denominator,
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l.denominator * r.numerator,
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).simplify();
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}
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// handle (k * sqrt(X)) / d 约分
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if (l is MulExpr &&
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l.left is IntExpr &&
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l.right is SqrtExpr &&
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r is IntExpr) {
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int coeff = (l.left as IntExpr).value;
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int denom = r.value;
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int g = _gcd(coeff.abs(), denom.abs());
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return MulExpr(
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IntExpr(coeff ~/ g),
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DivExpr(l.right, IntExpr(denom ~/ g)).evaluate(),
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).evaluate();
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}
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return DivExpr(l, r);
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}
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@override
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String toString() => "($left / $right)";
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}
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// === SqrtExpr.evaluate ===
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class SqrtExpr extends Expr {
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final Expr inner;
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SqrtExpr(this.inner);
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@override
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Expr simplify() {
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var i = inner.simplify();
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if (i is IntExpr) {
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int n = i.value;
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int root = sqrt(n).floor();
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if (root * root == n) {
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return IntExpr(root); // 完全平方数
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}
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// 尝试拆分 sqrt，比如 sqrt(8) = 2*sqrt(2)
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for (int k = root; k > 1; k--) {
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if (n % (k * k) == 0) {
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return MulExpr(
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IntExpr(k),
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SqrtExpr(IntExpr(n ~/ (k * k))),
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).simplify();
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}
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}
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}
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return SqrtExpr(i);
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}
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@override
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Expr evaluate() {
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var i = inner.evaluate();
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if (i is IntExpr) {
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int n = i.value;
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int root = sqrt(n).floor();
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if (root * root == n) return IntExpr(root);
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// 拆平方因子并返回 k * sqrt(remain)
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for (int k = root; k > 1; k--) {
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if (n % (k * k) == 0) {
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return MulExpr(
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IntExpr(k),
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SqrtExpr(IntExpr(n ~/ (k * k))),
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).evaluate();
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}
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}
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}
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return SqrtExpr(i);
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}
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@override
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String toString() => "sqrt($inner)";
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}
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// === CosExpr ===
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class CosExpr extends Expr {
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final Expr inner;
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CosExpr(this.inner);
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@override
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Expr simplify() => CosExpr(inner.simplify());
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@override
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Expr evaluate() {
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var i = inner.evaluate();
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if (i is IntExpr) {
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return DoubleExpr(cos(i.value.toDouble()));
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}
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if (i is FractionExpr) {
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return DoubleExpr(cos(i.numerator / i.denominator));
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}
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if (i is DoubleExpr) {
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return DoubleExpr(cos(i.value));
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}
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return CosExpr(i);
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}
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@override
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String toString() => "cos($inner)";
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}
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// === SinExpr ===
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class SinExpr extends Expr {
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final Expr inner;
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SinExpr(this.inner);
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@override
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Expr simplify() => SinExpr(inner.simplify());
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@override
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Expr evaluate() {
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var i = inner.evaluate();
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if (i is IntExpr) {
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return DoubleExpr(sin(i.value.toDouble()));
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}
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if (i is FractionExpr) {
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return DoubleExpr(sin(i.numerator / i.denominator));
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}
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if (i is DoubleExpr) {
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return DoubleExpr(sin(i.value));
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}
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return SinExpr(i);
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}
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@override
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String toString() => "sin($inner)";
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}
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|
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// === TanExpr ===
|
||||
class TanExpr extends Expr {
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final Expr inner;
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TanExpr(this.inner);
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||||
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@override
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||||
Expr simplify() => TanExpr(inner.simplify());
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@override
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||||
Expr evaluate() {
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var i = inner.evaluate();
|
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if (i is IntExpr) {
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||||
return DoubleExpr(tan(i.value.toDouble()));
|
||||
}
|
||||
if (i is FractionExpr) {
|
||||
return DoubleExpr(tan(i.numerator / i.denominator));
|
||||
}
|
||||
if (i is DoubleExpr) {
|
||||
return DoubleExpr(tan(i.value));
|
||||
}
|
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return TanExpr(i);
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||||
}
|
||||
|
||||
@override
|
||||
String toString() => "tan($inner)";
|
||||
}
|
||||
|
||||
// === 辅助：识别 a * sqrt(X) 形式 ===
|
||||
class _SqrtTerm {
|
||||
final int coef;
|
||||
final Expr inner;
|
||||
_SqrtTerm(this.coef, this.inner);
|
||||
}
|
||||
|
||||
_SqrtTerm? _asSqrtTerm(Expr e) {
|
||||
if (e is SqrtExpr) return _SqrtTerm(1, e.inner);
|
||||
if (e is MulExpr) {
|
||||
// 可能为 Int * Sqrt or Sqrt * Int
|
||||
if (e.left is IntExpr && e.right is SqrtExpr) {
|
||||
return _SqrtTerm((e.left as IntExpr).value, (e.right as SqrtExpr).inner);
|
||||
}
|
||||
if (e.right is IntExpr && e.left is SqrtExpr) {
|
||||
return _SqrtTerm((e.right as IntExpr).value, (e.left as SqrtExpr).inner);
|
||||
}
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
/// 辗转相除法求 gcd
|
||||
int _gcd(int a, int b) => b == 0 ? a : _gcd(b, a % b);
|
||||
111
lib/parser.dart
Normal file
111
lib/parser.dart
Normal file
@@ -0,0 +1,111 @@
|
||||
import 'package:simple_math_calc/calculator.dart';
|
||||
|
||||
class Parser {
|
||||
final String input;
|
||||
int pos = 0;
|
||||
|
||||
Parser(this.input);
|
||||
|
||||
bool get isEnd => pos >= input.length;
|
||||
String get current => isEnd ? '' : input[pos];
|
||||
|
||||
void eat() => pos++;
|
||||
|
||||
void skipSpaces() {
|
||||
while (!isEnd && input[pos] == ' ') {
|
||||
eat();
|
||||
}
|
||||
}
|
||||
|
||||
Expr parse() => parseAdd();
|
||||
|
||||
Expr parseAdd() {
|
||||
var expr = parseMul();
|
||||
skipSpaces();
|
||||
while (!isEnd && (current == '+' || current == '-')) {
|
||||
var op = current;
|
||||
eat();
|
||||
var right = parseMul();
|
||||
expr = op == '+' ? AddExpr(expr, right) : SubExpr(expr, right);
|
||||
skipSpaces();
|
||||
}
|
||||
return expr;
|
||||
}
|
||||
|
||||
Expr parseMul() {
|
||||
var expr = parseAtom();
|
||||
skipSpaces();
|
||||
while (!isEnd && (current == '*' || current == '/')) {
|
||||
var op = current;
|
||||
eat();
|
||||
var right = parseAtom();
|
||||
if (op == '*') {
|
||||
expr = MulExpr(expr, right);
|
||||
} else {
|
||||
expr = DivExpr(expr, right);
|
||||
}
|
||||
skipSpaces();
|
||||
}
|
||||
return expr;
|
||||
}
|
||||
|
||||
Expr parseAtom() {
|
||||
skipSpaces();
|
||||
if (current == '(') {
|
||||
eat();
|
||||
var expr = parse();
|
||||
if (current != ')') throw Exception("缺少 )");
|
||||
eat();
|
||||
return expr;
|
||||
}
|
||||
|
||||
if (input.startsWith("sqrt", pos)) {
|
||||
pos += 4;
|
||||
if (current != '(') throw Exception("sqrt 缺少 (");
|
||||
eat();
|
||||
var inner = parse();
|
||||
if (current != ')') throw Exception("sqrt 缺少 )");
|
||||
eat();
|
||||
return SqrtExpr(inner);
|
||||
}
|
||||
|
||||
if (input.startsWith("cos", pos)) {
|
||||
pos += 3;
|
||||
if (current != '(') throw Exception("cos 缺少 (");
|
||||
eat();
|
||||
var inner = parse();
|
||||
if (current != ')') throw Exception("cos 缺少 )");
|
||||
eat();
|
||||
return CosExpr(inner);
|
||||
}
|
||||
|
||||
if (input.startsWith("sin", pos)) {
|
||||
pos += 3;
|
||||
if (current != '(') throw Exception("sin 缺少 (");
|
||||
eat();
|
||||
var inner = parse();
|
||||
if (current != ')') throw Exception("sin 缺少 )");
|
||||
eat();
|
||||
return SinExpr(inner);
|
||||
}
|
||||
|
||||
if (input.startsWith("tan", pos)) {
|
||||
pos += 3;
|
||||
if (current != '(') throw Exception("tan 缺少 (");
|
||||
eat();
|
||||
var inner = parse();
|
||||
if (current != ')') throw Exception("tan 缺少 )");
|
||||
eat();
|
||||
return TanExpr(inner);
|
||||
}
|
||||
|
||||
// 解析整数
|
||||
var buf = '';
|
||||
while (!isEnd && RegExp(r'\d').hasMatch(current)) {
|
||||
buf += current;
|
||||
eat();
|
||||
}
|
||||
if (buf.isEmpty) throw Exception("无法解析: $current");
|
||||
return IntExpr(int.parse(buf));
|
||||
}
|
||||
}
|
||||
228
pubspec.lock
228
pubspec.lock
@@ -1,6 +1,22 @@
|
||||
# Generated by pub
|
||||
# See https://dart.dev/tools/pub/glossary#lockfile
|
||||
packages:
|
||||
_fe_analyzer_shared:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: _fe_analyzer_shared
|
||||
sha256: da0d9209ca76bde579f2da330aeb9df62b6319c834fa7baae052021b0462401f
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "85.0.0"
|
||||
analyzer:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: analyzer
|
||||
sha256: "974859dc0ff5f37bc4313244b3218c791810d03ab3470a579580279ba971a48d"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "7.7.1"
|
||||
ansicolor:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -57,6 +73,14 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "2.0.4"
|
||||
cli_config:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: cli_config
|
||||
sha256: ac20a183a07002b700f0c25e61b7ee46b23c309d76ab7b7640a028f18e4d99ec
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "0.2.0"
|
||||
cli_util:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -81,6 +105,22 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.19.1"
|
||||
convert:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: convert
|
||||
sha256: b30acd5944035672bc15c6b7a8b47d773e41e2f17de064350988c5d02adb1c68
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "3.1.2"
|
||||
coverage:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: coverage
|
||||
sha256: "5da775aa218eaf2151c721b16c01c7676fbfdd99cebba2bf64e8b807a28ff94d"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.15.0"
|
||||
crypto:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -121,6 +161,14 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "2.1.4"
|
||||
file:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: file
|
||||
sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "7.0.1"
|
||||
flutter:
|
||||
dependency: "direct main"
|
||||
description: flutter
|
||||
@@ -176,14 +224,30 @@ packages:
|
||||
description: flutter
|
||||
source: sdk
|
||||
version: "0.0.0"
|
||||
frontend_server_client:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: frontend_server_client
|
||||
sha256: f64a0333a82f30b0cca061bc3d143813a486dc086b574bfb233b7c1372427694
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "4.0.0"
|
||||
glob:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: glob
|
||||
sha256: c3f1ee72c96f8f78935e18aa8cecced9ab132419e8625dc187e1c2408efc20de
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "2.1.3"
|
||||
go_router:
|
||||
dependency: "direct main"
|
||||
description:
|
||||
name: go_router
|
||||
sha256: f02fd7d2a4dc512fec615529824fdd217fecb3a3d3de68360293a551f21634b3
|
||||
sha256: eb059dfe59f08546e9787f895bd01652076f996bcbf485a8609ef990419ad227
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "14.8.1"
|
||||
version: "16.2.1"
|
||||
google_fonts:
|
||||
dependency: "direct main"
|
||||
description:
|
||||
@@ -208,6 +272,14 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.5.0"
|
||||
http_multi_server:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: http_multi_server
|
||||
sha256: aa6199f908078bb1c5efb8d8638d4ae191aac11b311132c3ef48ce352fb52ef8
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "3.2.2"
|
||||
http_parser:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -224,6 +296,22 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "4.5.4"
|
||||
io:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: io
|
||||
sha256: dfd5a80599cf0165756e3181807ed3e77daf6dd4137caaad72d0b7931597650b
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.0.5"
|
||||
js:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: js
|
||||
sha256: "53385261521cc4a0c4658fd0ad07a7d14591cf8fc33abbceae306ddb974888dc"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "0.7.2"
|
||||
json_annotation:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -312,6 +400,14 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.16.0"
|
||||
mime:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: mime
|
||||
sha256: "41a20518f0cb1256669420fdba0cd90d21561e560ac240f26ef8322e45bb7ed6"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "2.0.0"
|
||||
nested:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -320,6 +416,22 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.0.0"
|
||||
node_preamble:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: node_preamble
|
||||
sha256: "6e7eac89047ab8a8d26cf16127b5ed26de65209847630400f9aefd7cd5c730db"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "2.0.2"
|
||||
package_config:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: package_config
|
||||
sha256: f096c55ebb7deb7e384101542bfba8c52696c1b56fca2eb62827989ef2353bbc
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "2.2.0"
|
||||
path:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -408,6 +520,14 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "2.1.8"
|
||||
pool:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: pool
|
||||
sha256: "20fe868b6314b322ea036ba325e6fc0711a22948856475e2c2b6306e8ab39c2a"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.5.1"
|
||||
posix:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -424,6 +544,14 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "6.1.5+1"
|
||||
pub_semver:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: pub_semver
|
||||
sha256: "5bfcf68ca79ef689f8990d1160781b4bad40a3bd5e5218ad4076ddb7f4081585"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "2.2.0"
|
||||
rational:
|
||||
dependency: "direct main"
|
||||
description:
|
||||
@@ -432,11 +560,59 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "2.2.3"
|
||||
shelf:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: shelf
|
||||
sha256: e7dd780a7ffb623c57850b33f43309312fc863fb6aa3d276a754bb299839ef12
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.4.2"
|
||||
shelf_packages_handler:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: shelf_packages_handler
|
||||
sha256: "89f967eca29607c933ba9571d838be31d67f53f6e4ee15147d5dc2934fee1b1e"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "3.0.2"
|
||||
shelf_static:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: shelf_static
|
||||
sha256: c87c3875f91262785dade62d135760c2c69cb217ac759485334c5857ad89f6e3
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.1.3"
|
||||
shelf_web_socket:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: shelf_web_socket
|
||||
sha256: "3632775c8e90d6c9712f883e633716432a27758216dfb61bd86a8321c0580925"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "3.0.0"
|
||||
sky_engine:
|
||||
dependency: transitive
|
||||
description: flutter
|
||||
source: sdk
|
||||
version: "0.0.0"
|
||||
source_map_stack_trace:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: source_map_stack_trace
|
||||
sha256: c0713a43e323c3302c2abe2a1cc89aa057a387101ebd280371d6a6c9fa68516b
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "2.1.2"
|
||||
source_maps:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: source_maps
|
||||
sha256: "190222579a448b03896e0ca6eca5998fa810fda630c1d65e2f78b3f638f54812"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "0.10.13"
|
||||
source_span:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -477,6 +653,14 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.2.2"
|
||||
test:
|
||||
dependency: "direct dev"
|
||||
description:
|
||||
name: test
|
||||
sha256: "65e29d831719be0591f7b3b1a32a3cda258ec98c58c7b25f7b84241bc31215bb"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.26.2"
|
||||
test_api:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -485,6 +669,14 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "0.7.6"
|
||||
test_core:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: test_core
|
||||
sha256: "80bf5a02b60af04b09e14f6fe68b921aad119493e26e490deaca5993fef1b05a"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "0.6.11"
|
||||
tuple:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -613,6 +805,14 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "15.0.2"
|
||||
watcher:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: watcher
|
||||
sha256: "5bf046f41320ac97a469d506261797f35254fa61c641741ef32dacda98b7d39c"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.1.3"
|
||||
web:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -621,6 +821,30 @@ packages:
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.1.1"
|
||||
web_socket:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: web_socket
|
||||
sha256: "34d64019aa8e36bf9842ac014bb5d2f5586ca73df5e4d9bf5c936975cae6982c"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.0.1"
|
||||
web_socket_channel:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: web_socket_channel
|
||||
sha256: d645757fb0f4773d602444000a8131ff5d48c9e47adfe9772652dd1a4f2d45c8
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "3.0.3"
|
||||
webkit_inspection_protocol:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: webkit_inspection_protocol
|
||||
sha256: "87d3f2333bb240704cd3f1c6b5b7acd8a10e7f0bc28c28dcf14e782014f4a572"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "1.2.1"
|
||||
xdg_directories:
|
||||
dependency: transitive
|
||||
description:
|
||||
|
||||
@@ -37,8 +37,8 @@ dependencies:
|
||||
math_expressions: ^3.1.0
|
||||
latext: ^0.5.1
|
||||
google_fonts: ^6.3.1
|
||||
go_router: ^14.2.0
|
||||
url_launcher: ^6.3.0
|
||||
go_router: ^16.2.1
|
||||
url_launcher: ^6.3.2
|
||||
rational: ^2.2.3
|
||||
|
||||
dev_dependencies:
|
||||
@@ -53,6 +53,7 @@ dev_dependencies:
|
||||
flutter_lints: ^6.0.0
|
||||
flutter_native_splash: ^2.4.6
|
||||
flutter_launcher_icons: ^0.14.4
|
||||
test: ^1.26.2
|
||||
|
||||
# For information on the generic Dart part of this file, see the
|
||||
# following page: https://dart.dev/tools/pub/pubspec
|
||||
|
||||
104
test/calculator_test.dart
Normal file
104
test/calculator_test.dart
Normal file
@@ -0,0 +1,104 @@
|
||||
import 'package:simple_math_calc/parser.dart';
|
||||
import 'package:test/test.dart';
|
||||
|
||||
void main() {
|
||||
group('整数', () {
|
||||
test('加法', () {
|
||||
var expr = Parser("2 + 3").parse();
|
||||
expect(expr.evaluate().toString(), "5");
|
||||
});
|
||||
|
||||
test('乘法', () {
|
||||
var expr = Parser("4 * 5").parse();
|
||||
expect(expr.evaluate().toString(), "20");
|
||||
});
|
||||
});
|
||||
|
||||
group('分数', () {
|
||||
test('简单分数', () {
|
||||
var expr = Parser("1/2").parse();
|
||||
expect(expr.evaluate().toString(), "1/2");
|
||||
});
|
||||
|
||||
test('分数加法', () {
|
||||
var expr = Parser("1/2 + 3/4").parse();
|
||||
expect(expr.evaluate().toString().replaceAll(' ', ''), "5/4");
|
||||
});
|
||||
|
||||
test('分数与整数相乘', () {
|
||||
var expr = Parser("2 * 3/4").parse();
|
||||
expect(expr.evaluate().toString(), "3/2");
|
||||
});
|
||||
});
|
||||
|
||||
group('开平方', () {
|
||||
test('完全平方数', () {
|
||||
var expr = Parser("sqrt(9)").parse();
|
||||
expect(expr.evaluate().toString(), "3");
|
||||
});
|
||||
|
||||
test('非完全平方数', () {
|
||||
var expr = Parser("sqrt(8)").parse();
|
||||
expect(expr.simplify().toString().replaceAll(' ', ''), "(2*sqrt(2))");
|
||||
});
|
||||
});
|
||||
|
||||
group('组合表达式', () {
|
||||
test('sqrt + 整数', () {
|
||||
var expr = Parser("2 + sqrt(9)").parse();
|
||||
expect(expr.simplify().toString().replaceAll(' ', ''), "(2+3)");
|
||||
});
|
||||
|
||||
test('分数 + sqrt', () {
|
||||
var expr = Parser("sqrt(8)/4 + 1/2").parse();
|
||||
expect(
|
||||
expr.evaluate().toString().replaceAll(' ', ''),
|
||||
"((sqrt(2)/2)+1/2)",
|
||||
);
|
||||
});
|
||||
});
|
||||
|
||||
group('加减除优先级', () {
|
||||
test('减法', () {
|
||||
var expr = Parser("5 - 2").parse();
|
||||
expect(expr.evaluate().toString(), "3");
|
||||
});
|
||||
|
||||
test('除法', () {
|
||||
var expr = Parser("6 / 3").parse();
|
||||
expect(expr.evaluate().toString(), "2");
|
||||
});
|
||||
|
||||
test('加法和乘法优先级', () {
|
||||
var expr = Parser("1 + 2 * 3").parse();
|
||||
expect(expr.evaluate().toString(), "7");
|
||||
});
|
||||
|
||||
test('加减混合', () {
|
||||
var expr = Parser("10 - 3 + 2").parse();
|
||||
expect(expr.evaluate().toString(), "9");
|
||||
});
|
||||
|
||||
test('括号优先级', () {
|
||||
var expr = Parser("(1 + 2) * 3").parse();
|
||||
expect(expr.evaluate().toString(), "9");
|
||||
});
|
||||
});
|
||||
|
||||
group('三角函数', () {
|
||||
test('cos(0)', () {
|
||||
var expr = Parser("cos(0)").parse();
|
||||
expect(expr.evaluate().toString(), "1.0");
|
||||
});
|
||||
|
||||
test('sin(0)', () {
|
||||
var expr = Parser("sin(0)").parse();
|
||||
expect(expr.evaluate().toString(), "0.0");
|
||||
});
|
||||
|
||||
test('tan(0)', () {
|
||||
var expr = Parser("tan(0)").parse();
|
||||
expect(expr.evaluate().toString(), "0.0");
|
||||
});
|
||||
});
|
||||
}
|
||||
Reference in New Issue
Block a user