Implemented assignments
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@ -11,6 +11,7 @@ hello() {
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address += 4194304
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address += 1
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length = 0
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length += 50
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length -= 20
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length *= 10
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38
src/build/Assignment.go
Normal file
38
src/build/Assignment.go
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@ -0,0 +1,38 @@
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package build
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import (
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"strconv"
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"git.akyoto.dev/cli/q/src/build/asm"
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"git.akyoto.dev/cli/q/src/build/expression"
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"git.akyoto.dev/cli/q/src/errors"
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)
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// CompileAssignment compiles an assignment.
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func (f *Function) CompileAssignment(expr *expression.Expression) error {
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name := expr.Children[0].Token.Text()
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number, _ := strconv.Atoi(expr.Children[1].Token.Text())
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register := f.Variables[name].Register
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switch expr.Token.Text() {
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case "=":
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f.ExpressionToRegister(expr.Children[1], register)
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case "+=":
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f.Assembler.RegisterNumber(asm.ADD, register, number)
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case "-=":
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f.Assembler.RegisterNumber(asm.SUB, register, number)
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case "*=":
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f.Assembler.RegisterNumber(asm.MUL, register, number)
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case "/=":
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f.Assembler.RegisterNumber(asm.DIV, register, number)
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default:
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return errors.New(&errors.InvalidInstruction{Instruction: expr.Token.Text()}, f.File, expr.Token.Position)
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}
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return nil
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}
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@ -109,37 +109,32 @@ func (f *Function) CompileInstruction(line token.List) error {
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return f.CompileVariableDefinition(expr)
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}
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if isAssignment(expr) {
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return f.CompileAssignment(expr)
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}
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if isFunctionCall(expr) {
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return f.CompileFunctionCall(expr)
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}
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if expr.Token.Kind == token.Operator {
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name := expr.Children[0].Token.Text()
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number, _ := strconv.Atoi(expr.Children[1].Token.Text())
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register := f.Variables[name].Register
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switch expr.Token.Text() {
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case "+=":
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f.Assembler.RegisterNumber(asm.ADD, register, number)
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return nil
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case "-=":
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f.Assembler.RegisterNumber(asm.SUB, register, number)
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return nil
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case "*=":
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f.Assembler.RegisterNumber(asm.MUL, register, number)
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return nil
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case "/=":
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f.Assembler.RegisterNumber(asm.DIV, register, number)
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return nil
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}
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}
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return errors.New(&errors.InvalidInstruction{Instruction: expr.Token.Text()}, f.File, expr.Token.Position)
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}
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// isAssignment returns true if the expression is an assignment.
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func isAssignment(expr *expression.Expression) bool {
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return expr.Token.Kind == token.Operator && expr.Token.Bytes[len(expr.Token.Bytes)-1] == '='
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}
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// isFunctionCall returns true if the expression is a function call.
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func isFunctionCall(expr *expression.Expression) bool {
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return expr.Token.Kind == token.Operator && expr.Token.Text() == "λ"
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}
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// isVariableDefinition returns true if the expression is a variable definition.
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func isVariableDefinition(expr *expression.Expression) bool {
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return expr.Token.Kind == token.Operator && expr.Token.Text() == ":="
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}
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// ExpressionToRegister moves the result of an expression into the given register.
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func (f *Function) ExpressionToRegister(root *expression.Expression, register cpu.Register) error {
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if root.IsLeaf() {
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@ -2,7 +2,6 @@ package build
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import (
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"git.akyoto.dev/cli/q/src/build/expression"
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"git.akyoto.dev/cli/q/src/build/token"
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)
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// CompileFunctionCall compiles a top-level function call.
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@ -26,8 +25,3 @@ func (f *Function) CompileFunctionCall(expr *expression.Expression) error {
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return nil
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}
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// isFunctionCall returns true if the expression is a function call.
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func isFunctionCall(expr *expression.Expression) bool {
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return expr.Token.Kind == token.Operator && expr.Token.Text() == "λ"
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}
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@ -48,8 +48,3 @@ func (f *Function) CompileVariableDefinition(expr *expression.Expression) error
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return nil
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}
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// isVariableDefinition returns true if the expression is a variable definition.
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func isVariableDefinition(expr *expression.Expression) bool {
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return expr.Token.Kind == token.Operator && expr.Token.Text() == ":="
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}
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