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more cleanup

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dfsek
2020-12-22 15:13:01 -07:00
parent 9c1eab04b9
commit e5d9ae62fa
2 changed files with 52 additions and 55 deletions
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81
common/src/main/java/com/dfsek/terra/api/structures/parser/Parser.java
View File

@@ -57,6 +57,12 @@ public class Parser {
return this;
}
/**
* Parse input
*
* @return executable {@link Block}
* @throws ParseException If parsing fails.
*/
public Block parse() throws ParseException {
Tokenizer tokenizer = new Tokenizer(data);
@@ -80,7 +86,7 @@ public class Parser {
@SuppressWarnings("unchecked")
private Keyword<?> parseKeyword(List<Token> tokens, Map<String, Variable<?>> variableMap) throws ParseException {
private Keyword<?> parseLoopLike(List<Token> tokens, Map<String, Variable<?>> variableMap) throws ParseException {
Token identifier = tokens.remove(0);
ParserUtil.checkType(identifier, Token.Type.IF_STATEMENT, Token.Type.WHILE_LOOP);
@@ -178,8 +184,9 @@ public class Parser {
@SuppressWarnings("unchecked")
private BinaryOperation<?, ?> assemble(Returnable<?> left, Returnable<?> right, Token binaryOperator) throws ParseException {
if(binaryOperator.isStrictNumericOperator()) ParserUtil.checkArithmeticOperation(left, right, binaryOperator);
if(binaryOperator.isStrictBooleanOperator()) ParserUtil.checkBooleanOperation(left, right, binaryOperator);
if(binaryOperator.isStrictNumericOperator())
ParserUtil.checkArithmeticOperation(left, right, binaryOperator); // Numeric type checking
if(binaryOperator.isStrictBooleanOperator()) ParserUtil.checkBooleanOperation(left, right, binaryOperator); // Boolean type checking
switch(binaryOperator.getType()) {
case ADDITION_OPERATOR:
if(left.returnType().equals(Returnable.ReturnType.NUMBER) && right.returnType().equals(Returnable.ReturnType.NUMBER)) {
@@ -226,62 +233,48 @@ public class Parser {
throw new UnsupportedOperationException("Unsupported variable type: " + type);
}
@SuppressWarnings("unchecked")
private Block parseBlock(List<Token> tokens, Map<String, Variable<?>> superVars) throws ParseException {
List<Item<?>> parsedItems = new GlueList<>();
Map<String, Variable<?>> parsedVariables = new HashMap<>(superVars); // New hashmap as to not mutate parent scope's declarations.
Token first = tokens.get(0);
ParserUtil.checkType(tokens.get(0), Token.Type.IDENTIFIER, Token.Type.IF_STATEMENT, Token.Type.WHILE_LOOP, Token.Type.NUMBER_VARIABLE, Token.Type.STRING_VARIABLE, Token.Type.BOOLEAN_VARIABLE);
main:
while(tokens.size() > 0) {
Token token = tokens.get(0);
ParserUtil.checkType(token, Token.Type.IDENTIFIER, Token.Type.IF_STATEMENT, Token.Type.WHILE_LOOP, Token.Type.BLOCK_END, Token.Type.NUMBER_VARIABLE, Token.Type.STRING_VARIABLE, Token.Type.BOOLEAN_VARIABLE);
switch(token.getType()) {
case IF_STATEMENT:
case WHILE_LOOP:
parsedItems.add(parseKeyword(tokens, parsedVariables));
if(tokens.isEmpty()) break;
ParserUtil.checkType(tokens.get(0), Token.Type.IDENTIFIER, Token.Type.IF_STATEMENT, Token.Type.WHILE_LOOP, Token.Type.BLOCK_END);
break;
case IDENTIFIER:
if(parsedVariables.containsKey(token.getContent())) {
Variable<?> variable = parsedVariables.get(token.getContent());
if(token.getType().equals(Token.Type.BLOCK_END)) break; // Stop parsing at block end.
parsedItems.add(parseAssignment(variable, tokens, parsedVariables));
} else parsedItems.add(parseFunction(tokens, true, parsedVariables));
if(tokens.isEmpty()) break;
ParserUtil.checkType(tokens.remove(0), Token.Type.STATEMENT_END, Token.Type.BLOCK_END);
break;
case NUMBER_VARIABLE:
case BOOLEAN_VARIABLE:
case STRING_VARIABLE:
Variable<?> temp;
if(token.getType().equals(Token.Type.NUMBER_VARIABLE))
temp = parseVariableDeclaration(tokens, Returnable.ReturnType.NUMBER);
else if(token.getType().equals(Token.Type.STRING_VARIABLE))
temp = parseVariableDeclaration(tokens, Returnable.ReturnType.STRING);
else temp = parseVariableDeclaration(tokens, Returnable.ReturnType.BOOLEAN);
Token name = tokens.get(1);
ParserUtil.checkType(token, Token.Type.IDENTIFIER, Token.Type.IF_STATEMENT, Token.Type.WHILE_LOOP, Token.Type.NUMBER_VARIABLE, Token.Type.STRING_VARIABLE, Token.Type.BOOLEAN_VARIABLE);
ParserUtil.checkType(name, Token.Type.IDENTIFIER); // Name must be an identifier.
if(token.isLoopLike()) { // Parse loop-like tokens (if, while, etc)
parsedItems.add(parseLoopLike(tokens, parsedVariables));
} else if(token.isIdentifier()) { // Parse identifiers
if(parsedVariables.containsKey(token.getContent())) { // Assume variable assignment
Variable<?> variable = parsedVariables.get(token.getContent());
parsedItems.add(parseAssignment(variable, tokens, parsedVariables));
} else parsedItems.add(parseFunction(tokens, true, parsedVariables));
} else if(token.isVariableDeclaration()) {
Variable<?> temp;
if(token.getType().equals(Token.Type.NUMBER_VARIABLE))
temp = parseVariableDeclaration(tokens, Returnable.ReturnType.NUMBER);
else if(token.getType().equals(Token.Type.STRING_VARIABLE))
temp = parseVariableDeclaration(tokens, Returnable.ReturnType.STRING);
else temp = parseVariableDeclaration(tokens, Returnable.ReturnType.BOOLEAN);
Token name = tokens.get(1);
if(functions.containsKey(name.getContent()) || parsedVariables.containsKey(name.getContent()))
throw new ParseException(name.getContent() + " is already defined in this scope: " + name.getPosition());
ParserUtil.checkType(name, Token.Type.IDENTIFIER); // Name must be an identifier.
parsedVariables.put(name.getContent(), temp);
if(functions.containsKey(name.getContent()) || parsedVariables.containsKey(name.getContent()))
throw new ParseException(name.getContent() + " is already defined in this scope: " + name.getPosition());
ParserUtil.checkType(tokens.remove(0), Token.Type.STRING_VARIABLE, Token.Type.BOOLEAN_VARIABLE, Token.Type.NUMBER_VARIABLE);
parsedVariables.put(name.getContent(), temp);
parsedItems.add(parseAssignment(temp, tokens, parsedVariables));
ParserUtil.checkType(tokens.remove(0), Token.Type.STATEMENT_END);
break;
case BLOCK_END:
tokens.remove(0); // Remove block end.
break main;
}
ParserUtil.checkType(tokens.remove(0), Token.Type.STRING_VARIABLE, Token.Type.BOOLEAN_VARIABLE, Token.Type.NUMBER_VARIABLE);
parsedItems.add(parseAssignment(temp, tokens, parsedVariables));
} else throw new UnsupportedOperationException("Unexpected token " + token.getType() + ": " + token.getPosition());
if(!tokens.isEmpty()) ParserUtil.checkType(tokens.remove(0), Token.Type.STATEMENT_END, Token.Type.BLOCK_END);
}
return new Block(parsedItems, first.getPosition());
}

26
common/src/main/java/com/dfsek/terra/api/structures/tokenizer/Token.java
View File

@@ -62,6 +62,21 @@ public class Token {
|| type.equals(Type.BOOLEAN_OR);
}
public boolean isVariableDeclaration() {
return type.equals(Type.STRING_VARIABLE)
|| type.equals(Type.BOOLEAN_VARIABLE)
|| type.equals(Type.NUMBER_VARIABLE);
}
public boolean isLoopLike() {
return type.equals(Type.IF_STATEMENT)
|| type.equals(Type.WHILE_LOOP);
}
public boolean isIdentifier() {
return type.equals(Type.IDENTIFIER);
}
public enum Type {
/**
* Function identifier or language keyword
@@ -170,15 +185,4 @@ public class Token {
IF_STATEMENT,
WHILE_LOOP
}
public enum Group {
KEYWORD(Type.IF_STATEMENT, Type.WHILE_LOOP, Type.BOOLEAN_VARIABLE, Type.STRING_VARIABLE, Type.NUMBER_VARIABLE),
IDENTIFIER(Type.IDENTIFIER),
BINARY_OPERATOR(Type.BOOLEAN_AND, Type.BOOLEAN_OR, Type.ADDITION_OPERATOR, Type.MULTIPLICATION_OPERATOR, Type.SUBTRACTION_OPERATOR, Type.DIVISION_OPERATOR, Type.GREATER_THAN_OPERATOR, Type.GREATER_THAN_OR_EQUALS_OPERATOR, Type.LESS_THAN_OPERATOR, Type.LESS_THAN_OR_EQUALS_OPERATOR, Type.EQUALS_OPERATOR, Type.NOT_EQUALS_OPERATOR);
private final Type[] types;
Group(Type... types) {
this.types = types;
}
}
}