From 2b018c5d4e4fb0a1b1cb5129031d53fb1bc9716d Mon Sep 17 00:00:00 2001
From: dbaumgarten <mail@dbaumgarten.net>
Date: Thu, 26 Nov 2020 21:26:31 +0100
Subject: [PATCH] Changed precedence for and/or

---
 pkg/optimizers/expression_inversion_test.go | 36 ++++++++++-----------
 pkg/parser/parser.go                        | 14 +++++---
 pkg/parser/printer.go                       | 28 ++++++++--------
 3 files changed, 41 insertions(+), 37 deletions(-)

diff --git a/pkg/optimizers/expression_inversion_test.go b/pkg/optimizers/expression_inversion_test.go
index a7f4ce4..4ea5688 100644
--- a/pkg/optimizers/expression_inversion_test.go
+++ b/pkg/optimizers/expression_inversion_test.go
@@ -5,24 +5,24 @@ import (
 )
 
 var inversionCases = map[string]string{
-	"a=123":                                 "a=123",
-	"a=not true":                            "a=not true",
-	"x=a or b":                              "x=a or b",
-	"x=not (a or b)":                        "x=not (a or b)",
-	"x=not a and not b":                     "x=not (a or b)",
-	"x=not (a==b)":                          "x=a!=b",
-	"x=not (a > b)":                         "x=a<=b",
-	"x=not (a >= b)":                        "x=a<b",
-	"x=not not y":                           "x=y",
-	"x=not not y<3":                         "x=y<3",
-	"x=not a and not b or not c and not d":  "x=not (a or b and c or d)",
-	"x=not (not a and not b)":               "x=a or b",
-	"x=not (not a and b)":                   "x=a or not b",
-	"x=not a and not b and not c and not d": "x=not (a or b or c or d)",
-	"x=:number%3==0 and :number%5==0":       "x=:number%3==0 and :number%5==0",
-	"x=not(:number%3==0 and :number%5==0)":  "x=:number%3!=0 or :number%5!=0",
-	"y=not (c++ <5)":                        "y=c++ >=5",
-	"y=c++ >=5":                             "y=c++ >=5",
+	"a=123":             "a=123",
+	"a=not true":        "a=not true",
+	"x=a or b":          "x=a or b",
+	"x=not (a or b)":    "x=not (a or b)",
+	"x=not a and not b": "x=not (a or b)",
+	"x=not (a==b)":      "x=a!=b",
+	"x=not (a > b)":     "x=a<=b",
+	"x=not (a >= b)":    "x=a<b",
+	"x=not not y":       "x=y",
+	"x=not not y<3":     "x=y<3",
+	"x=(not a and not b) or (not c and not d)": "x=not (a or b and c or d)",
+	"x=not (not a and not b)":                  "x=a or b",
+	"x=not (not a and b)":                      "x=a or not b",
+	"x=not a and not b and not c and not d":    "x=not (a or b or c or d)",
+	"x=:number%3==0 and :number%5==0":          "x=:number%3==0 and :number%5==0",
+	"x=not(:number%3==0 and :number%5==0)":     "x=:number%3!=0 or :number%5!=0",
+	"y=not (c++ <5)":                           "y=c++ >=5",
+	"y=c++ >=5":                                "y=c++ >=5",
 }
 
 func TestInversionOptimization(t *testing.T) {
diff --git a/pkg/parser/parser.go b/pkg/parser/parser.go
index 8240bfc..1e5854d 100644
--- a/pkg/parser/parser.go
+++ b/pkg/parser/parser.go
@@ -423,22 +423,26 @@ func (p *Parser) ParseBinaryExpression(idx int) ast.Expression {
 
 	switch idx {
 	case 0:
-		ops = []string{"or", "and"}
+		ops = []string{"and"}
 		expectedType = ast.TypeKeyword
 		break
 	case 1:
-		ops = []string{"==", "!="}
+		ops = []string{"or"}
+		expectedType = ast.TypeKeyword
 		break
 	case 2:
-		ops = []string{"<=", ">=", "<", ">"}
+		ops = []string{"==", "!="}
 		break
 	case 3:
-		ops = []string{"+", "-"}
+		ops = []string{"<=", ">=", "<", ">"}
 		break
 	case 4:
-		ops = []string{"*", "/", "%"}
+		ops = []string{"+", "-"}
 		break
 	case 5:
+		ops = []string{"*", "/", "%"}
+		break
+	case 6:
 		ops = []string{"^"}
 		leftAssoc = false
 		break
diff --git a/pkg/parser/printer.go b/pkg/parser/printer.go
index bd08957..34b6571 100644
--- a/pkg/parser/printer.go
+++ b/pkg/parser/printer.go
@@ -41,21 +41,21 @@ type Printer struct {
 }
 
 var operatorPriority = map[string]int{
-	"or":  0,
 	"and": 0,
-	"==":  1,
-	"!=":  1,
-	">=":  2,
-	"<=":  2,
-	">":   2,
-	"<":   2,
-	"+":   3,
-	"-":   3,
-	"*":   4,
-	"/":   4,
-	"%":   4,
-	"^":   5,
-	"not": 6,
+	"or":  1,
+	"==":  2,
+	"!=":  2,
+	">=":  3,
+	"<=":  3,
+	">":   3,
+	"<":   3,
+	"+":   4,
+	"-":   4,
+	"*":   5,
+	"/":   5,
+	"%":   5,
+	"^":   6,
+	"not": 7,
 }
 
 // end and else are missing here, because unlike other keywords they might require a space after them