fix: correct and simplify parsing of expressions.

The expressions were parsed from right to left, and it was incorrect and
cumbersome. Now they are processed from left to right, with a simpler
and correct handling of precedence rules.

The vm function call syntax has been changed to set the function
before the input arguments on the stack, as to follow the declaring
order in languages.

1 files changed, 10 insertions, 9 deletions

diff --git a/vm/op_string.go b/vm/op_string.go
index 63bf738..7eb0e5d 100644
--- a/vm/op_string.go
+++ b/vm/op_string.go
@@ -38,18 +38,19 @@ func _() {
 	_ = x[Loweri-27]
 	_ = x[Mul-28]
 	_ = x[New-29]
-	_ = x[Not-30]
-	_ = x[Pop-31]
-	_ = x[Push-32]
-	_ = x[Return-33]
-	_ = x[Sub-34]
-	_ = x[Subi-35]
-	_ = x[Swap-36]
+	_ = x[Negate-30]
+	_ = x[Not-31]
+	_ = x[Pop-32]
+	_ = x[Push-33]
+	_ = x[Return-34]
+	_ = x[Sub-35]
+	_ = x[Subi-36]
+	_ = x[Swap-37]
 }
 
-const _Op_name = "NopAddAddrAssignFassignVassignCallCalliCallXDerefDupFdupFnewEqualEqualSetExitFieldFieldSetGreaterGrowIndexJumpJumpTrueJumpFalseJumpSetTrueJumpSetFalseLowerLoweriMulNewNotPopPushReturnSubSubiSwap"
+const _Op_name = "NopAddAddrAssignFassignVassignCallCalliCallXDerefDupFdupFnewEqualEqualSetExitFieldFieldSetGreaterGrowIndexJumpJumpTrueJumpFalseJumpSetTrueJumpSetFalseLowerLoweriMulNewNegateNotPopPushReturnSubSubiSwap"
 
-var _Op_index = [...]uint8{0, 3, 6, 10, 16, 23, 30, 34, 39, 44, 49, 52, 56, 60, 65, 73, 77, 82, 90, 97, 101, 106, 110, 118, 127, 138, 150, 155, 161, 164, 167, 170, 173, 177, 183, 186, 190, 194}
+var _Op_index = [...]uint8{0, 3, 6, 10, 16, 23, 30, 34, 39, 44, 49, 52, 56, 60, 65, 73, 77, 82, 90, 97, 101, 106, 110, 118, 127, 138, 150, 155, 161, 164, 167, 173, 176, 179, 183, 189, 192, 196, 200}
 
 func (i Op) String() string {
 	idx := int(i) - 0