57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
package core
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
|
|
"git.urbach.dev/cli/q/src/asm"
|
|
"git.urbach.dev/cli/q/src/ast"
|
|
"git.urbach.dev/cli/q/src/errors"
|
|
"git.urbach.dev/cli/q/src/eval"
|
|
"git.urbach.dev/cli/q/src/types"
|
|
)
|
|
|
|
// CompileAssignArray compiles an assign statement for array elements.
|
|
func (f *Function) CompileAssignArray(node *ast.Assign) error {
|
|
left := node.Expression.Children[0]
|
|
right := node.Expression.Children[1]
|
|
name := left.Children[0].Token.Text(f.File.Bytes)
|
|
variable := f.VariableByName(name)
|
|
|
|
if variable == nil {
|
|
return errors.New(&errors.UnknownIdentifier{Name: name}, f.File, left.Children[0].Token.Position)
|
|
}
|
|
|
|
defer f.UseVariable(variable)
|
|
|
|
memory := asm.Memory{
|
|
Base: variable.Register,
|
|
Offset: 0,
|
|
OffsetRegister: math.MaxUint8,
|
|
Length: byte(1),
|
|
}
|
|
|
|
indexExpr := left.Children[1]
|
|
index, err := f.Evaluate(indexExpr)
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if !types.Is(index.Type, types.AnyInt) {
|
|
return errors.New(&errors.TypeMismatch{Encountered: index.Type.Name(), Expected: types.AnyInt.Name()}, f.File, indexExpr.Token.Position)
|
|
}
|
|
|
|
switch index.Kind {
|
|
case eval.Number:
|
|
memory.Offset = int8(index.Number)
|
|
case eval.Register:
|
|
memory.OffsetRegister = index.Register
|
|
defer f.FreeRegister(index.Register)
|
|
default:
|
|
panic(fmt.Errorf("%s: not implemented: %d", f.UniqueName, index.Kind))
|
|
}
|
|
|
|
_, err = f.ExpressionToMemory(right, memory)
|
|
return err
|
|
}
|