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Added increment/decrement operators.

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arookas 2015-12-10 21:45:35 -05:00
parent 0b78c1dafe
commit 59374db502
4 changed files with 110 additions and 4 deletions
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90
ast/nodes.expressions.cs
View file

@ -102,8 +102,8 @@ namespace arookas
public sunExpression TrueBody { get { return this[1] as sunExpression; } }
public sunExpression FalseBody { get { return this[2] as sunExpression; } }
public sunTernaryOperator(sunSourceLocation node)
: base(node)
public sunTernaryOperator(sunSourceLocation location)
: base(location)
{
}
@ -119,4 +119,90 @@ namespace arookas
context.Text.ClosePoint(trueEpilogue);
}
}
// increment/decrement
class sunPostfixAugment : sunOperand
{
public sunIdentifier Variable { get { return this[0] as sunIdentifier; } }
public sunAugment Operator { get { return this[1] as sunAugment; } }
public sunPostfixAugment(sunSourceLocation location)
: base(location)
{
}
public override void Compile(sunContext context)
{
var variableInfo = context.ResolveVariable(Variable);
if (Parent is sunOperand)
{
context.Text.PushVariable(variableInfo);
}
Operator.Compile(context, variableInfo);
context.Text.StoreVariable(variableInfo);
}
}
class sunPrefixAugment : sunOperand
{
public sunAugment Operator { get { return this[0] as sunAugment; } }
public sunIdentifier Variable { get { return this[1] as sunIdentifier; } }
public sunPrefixAugment(sunSourceLocation location)
: base(location)
{
}
public override void Compile(sunContext context)
{
var variableInfo = context.ResolveVariable(Variable);
Operator.Compile(context, variableInfo);
context.Text.StoreVariable(variableInfo);
if (Parent is sunOperand)
{
context.Text.PushVariable(variableInfo);
}
}
}
abstract class sunAugment : sunNode
{
protected sunAugment(sunSourceLocation location)
: base(location)
{
}
public abstract void Compile(sunContext context, sunVariableInfo variable);
}
class sunIncrement : sunAugment
{
public sunIncrement(sunSourceLocation location)
: base(location)
{
}
public override void Compile(sunContext context, sunVariableInfo variable)
{
context.Text.IncVariable(variable);
}
}
class sunDecrement : sunAugment
{
public sunDecrement(sunSourceLocation location)
: base(location)
{
}
public override void Compile(sunContext context, sunVariableInfo variable)
{
context.Text.DecVariable(variable);
}
}
}

4
language.md
View file

@ -132,8 +132,8 @@ Loops may be named. To name a loop, simply prefix the loop with a label. `break`
```
outer_loop:
for (var a; a < 4; a += 1) {
for (var b; b < 4; b += 1) {
for (var a; a < 4; ++a) {
for (var b; b < 4; ++b) {
if (b == 2) break outer_loop;
}
}

10
parser.cs
View file

@ -61,9 +61,11 @@ namespace arookas
case __sunConstants.STATEMENT:
case __sunConstants.COMPOUND_STATEMENT:
case __sunConstants.COMPOUND_STATEMENT_ITEM:
case __sunConstants.VARIABLE_AUGMENT:
case __sunConstants.ASSIGNMENT_OPERATOR:
case __sunConstants.BINARY_OPERATOR:
case __sunConstants.UNARY_OPERATOR:
case __sunConstants.AUGMENT_OPERATOR:
case __sunConstants.TERM:
case __sunConstants.PARAMETER:
case __sunConstants.ARGUMENT_LIST:
@ -162,10 +164,14 @@ namespace arookas
case __sunConstants.ASSIGN_BIT_LSH: return new sunAssignBitLsh(location);
case __sunConstants.ASSIGN_BIT_RSH: return new sunAssignBitRsh(location);
case __sunConstants.INCREMENT: return new sunIncrement(location);
case __sunConstants.DECREMENT: return new sunDecrement(location);
case __sunConstants.ASSIGNMENT_OPERATOR: return new sunNode(location);
case __sunConstants.TERNARY_OPERATOR: return new sunTernaryOperator(location);
case __sunConstants.BINARY_OPERATOR: return new sunNode(location);
case __sunConstants.UNARY_OPERATOR: return new sunNode(location);
case __sunConstants.AUGMENT_OPERATOR: return new sunNode(location);
}
// expressions
@ -180,6 +186,9 @@ namespace arookas
case __sunConstants.INT_CAST: return new sunIntCast(location);
case __sunConstants.FLOAT_CAST: return new sunFloatCast(location);
case __sunConstants.TYPEOF_CAST: return new sunTypeofCast(location);
case __sunConstants.PREFIX_AUGMENT: return new sunPrefixAugment(location);
case __sunConstants.POSTFIX_AUGMENT: return new sunPostfixAugment(location);
}
// builtins
@ -207,6 +216,7 @@ namespace arookas
case __sunConstants.VARIABLE_DECLARATION: return new sunVariableDeclaration(location);
case __sunConstants.VARIABLE_DEFINITION: return new sunVariableDefinition(location);
case __sunConstants.VARIABLE_ASSIGNMENT: return new sunVariableAssignment(location);
case __sunConstants.VARIABLE_AUGMENT: return new sunNode(location);
}
// constants

10
sunscript.grammar
View file

@ -100,6 +100,9 @@ ASSIGN_BIT_OR = "|="
ASSIGN_BIT_LSH = "<<="
ASSIGN_BIT_RSH = ">>="
INCREMENT = "++"
DECREMENT = "--"
// literals
IDENTIFIER = <<[_A-Za-z][_A-Za-z0-9]*>>
DEC_NUMBER = <<-?[0-9]+\.[0-9]+>>
@ -138,6 +141,7 @@ compound_statement_item =
variable_definition |
variable_declaration |
variable_assignment |
variable_augment |
print_statement |
function_call;
statement_block = L_BRACE {statement} R_BRACE;
@ -161,6 +165,7 @@ binary_operator =
EQ | NEQ | LT | LTEQ | GT | GTEQ | // comparison
LOG_AND | LOG_OR; // logical
unary_operator = LOG_NOT | SUB;
augment_operator = INCREMENT | DECREMENT;
// expressions
expression = operand {binary_operator operand};
@ -171,6 +176,7 @@ term =
typeof_cast |
function_call |
variable_reference |
variable_augment |
STRING |
DEC_NUMBER |
HEX_NUMBER |
@ -194,6 +200,10 @@ variable_reference = IDENTIFIER; // used in expressions
variable_declaration = VAR IDENTIFIER;
variable_definition = VAR IDENTIFIER assignment_operator expression;
variable_assignment = IDENTIFIER assignment_operator expression;
variable_augment = postfix_augment | prefix_augment;
postfix_augment = IDENTIFIER augment_operator;
prefix_augment = augment_operator IDENTIFIER;
// functions
function_definition = FUNCTION IDENTIFIER parameter_list statement_block;