fix: #119

baidu · Aug 30, 2021 · abf73e3 · abf73e3
1 parent b8ba4c2
commit abf73e3
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diff --git a/src/compilers/san-expr-compiler.ts b/src/compilers/san-expr-compiler.ts
@@ -57,6 +57,7 @@ const binaryOp = {
 function unary (e: ExprUnaryNode) {
     if (e.operator === 33) return new UnaryExpression('!', sanExpr(e.expr))
     if (e.operator === 45) return new UnaryExpression('-', sanExpr(e.expr))
+    if (e.operator === 43) return new UnaryExpression('+', sanExpr(e.expr))
     throw new Error(`unexpected unary operator "${String.fromCharCode(e.operator)}"`)
 }
 function binary (e: ExprBinaryNode) {

diff --git a/test/unit/compilers/san-expr-compiler.spec.ts b/test/unit/compilers/san-expr-compiler.spec.ts
@@ -20,6 +20,28 @@ describe('compilers/san-expr-compiler', () => {
                 rhs: dataItem('b')
             }))
         })
+        it('should compile unary expression', () => {
+            const e = parseExpr('+num === 123')
+            expect(expr(e)).toMatchObject({
+                kind: SyntaxKind.BinaryExpression,
+                lhs: {
+                    kind: SyntaxKind.UnaryExpression,
+                    op: '+',
+                    value: {
+                        kind: SyntaxKind.BinaryExpression,
+                        rhs: {
+                            kind: SyntaxKind.Literal,
+                            value: 'num'
+                        }
+                    }
+                },
+                op: '===',
+                rhs: {
+                    kind: SyntaxKind.Literal,
+                    value: 123
+                }
+            })
+        })
         it('should throw for unexpected expression type', () => {
             const e = parseExpr('!b')
             e.type = 222