From 26105034da4fcce7ac883c899d781f016559310d Mon Sep 17 00:00:00 2001
From: ruki <waruqi@gmail.com>
Date: Thu, 8 Nov 2018 00:38:48 +0800
Subject: switch to vuepress

---
 .../src/formula_evaluator.js                       | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100755 node_modules/math-expression-evaluator/src/formula_evaluator.js

(limited to 'node_modules/math-expression-evaluator/src/formula_evaluator.js')

diff --git a/node_modules/math-expression-evaluator/src/formula_evaluator.js b/node_modules/math-expression-evaluator/src/formula_evaluator.js
new file mode 100755
index 00000000..72db4eb5
--- /dev/null
+++ b/node_modules/math-expression-evaluator/src/formula_evaluator.js
@@ -0,0 +1,41 @@
+var Mexp=require('./postfix_evaluator.js');
+Mexp.prototype.formulaEval = function () {
+	"use strict";
+	var stack=[],pop1,pop2,pop3;
+	var disp=[];
+	var temp='';
+	var arr=this.value;
+	for(var i=0;i<arr.length;i++){
+		if(arr[i].type===1||arr[i].type===3){
+			disp.push({value:arr[i].type===3?arr[i].show:arr[i].value,type:1});
+		}
+		else if(arr[i].type===13){
+			disp.push({value:arr[i].show,type:1});
+		}
+		else if(arr[i].type===0){
+			disp[disp.length-1]={value:arr[i].show+(arr[i].show!="-"?"(":"")+disp[disp.length-1].value+(arr[i].show!="-"?")":""),type:0};
+		}
+		else if(arr[i].type===7){
+			disp[disp.length-1]={value:(disp[disp.length-1].type!=1?"(":"")+disp[disp.length-1].value+(disp[disp.length-1].type!=1?")":"")+arr[i].show,type:7};
+		}
+		else if(arr[i].type===10){
+			pop1=disp.pop();
+			pop2=disp.pop();
+			if(arr[i].show==='P'||arr[i].show==='C')disp.push({value:"<sup>"+pop2.value+"</sup>"+arr[i].show+"<sub>"+pop1.value+"</sub>",type:10});
+			else disp.push({value:(pop2.type!=1?"(":"")+pop2.value+(pop2.type!=1?")":"")+"<sup>"+pop1.value+"</sup>",type:1});
+		}
+		else if(arr[i].type===2||arr[i].type===9){
+			pop1=disp.pop();
+			pop2=disp.pop();
+			disp.push({value:(pop2.type!=1?"(":"")+pop2.value+(pop2.type!=1?")":"")+arr[i].show+(pop1.type!=1?"(":"")+pop1.value+(pop1.type!=1?")":""),type:arr[i].type});
+		}
+		else if(arr[i].type===12){
+			pop1=disp.pop();
+			pop2=disp.pop();
+			pop3=disp.pop();
+			disp.push({value:arr[i].show+"("+pop3.value+","+pop2.value+","+pop1.value+")",type:12});
+		}
+	}
+	return disp[0].value;
+};
+module.exports=Mexp;
\ No newline at end of file
-- 
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