ast: now supports espression forest (multi expressions)

parser_test.go

@@ -65,7 +65,7 @@ func TestParser(t *testing.T) {
 		/* 39 */ {`(((1)))`, int64(1), nil},
 		/* 40 */ {`"uno_" + var2`, `uno_abc`, nil},
 		/* 41 */ {`0 || 0.0 && "hello"`, false, nil},
-		/* 42 */ {`"s" + true`, nil, errors.New(`left operand 's' [string] is not compatible with right operand 'true' [bool] with respect to operator "+"`)},
+		/* 42 */ {`"s" + true`, nil, errors.New(`left operand 's' [string] and right operand 'true' [bool] are not compatible with operator "+"`)},
 		/* 43 */ {`+false`, nil, errors.New(`prefix/postfix operator "+" do not support operand 'false' [bool]`)},
 		/* 44 */ {`false // very simple expression`, false, nil},
 		/* 45 */ {`1 + // Missing right operator`, nil, errors.New(`infix operator "+" requires two operands, got 1`)},
@@ -108,7 +108,7 @@ func TestParser(t *testing.T) {
 		/* 82 */ {`5 % 2`, int64(1), nil},
 		/* 83 */ {`5 % (-2)`, int64(1), nil},
 		/* 84 */ {`-5 % 2`, int64(-1), nil},
-		/* 85 */ {`5 % 2.0`, nil, errors.New(`left operand '5' [int64] is not compatible with right operand '2' [float64] with respect to operator "%"`)},
+		/* 85 */ {`5 % 2.0`, nil, errors.New(`left operand '5' [int64] and right operand '2' [float64] are not compatible with operator "%"`)},
 		/* 86 */ {`"a" < "b" AND NOT (2 < 1)`, true, nil},
 		/* 87 */ {`"a" < "b" AND NOT (2 == 1)`, true, nil},
 		/* 88 */ {`"a" < "b" AND ~ 2 == 1`, true, nil},
@@ -147,7 +147,7 @@ func TestParser(t *testing.T) {
 
 		good := true
 		if expr, gotErr = parser.parse(scanner); gotErr == nil {
-			gotResult, gotErr = expr.eval(ctx)
+			gotResult, gotErr = expr.Eval(ctx)
 		}
 
 		if gotResult != input.wantResult {
@@ -221,7 +221,7 @@ func NoTestListParser(t *testing.T) {
 
 		good := true
 		if expr, gotErr = parser.parse(scanner); gotErr == nil {
-			gotResult, gotErr = expr.eval(ctx)
+			gotResult, gotErr = expr.Eval(ctx)
 		}
 
 		if (gotResult == nil && input.wantResult != nil) || (gotResult != nil && input.wantResult == nil) {