Examples with SegmentCode jetbrick.template.parser.code.SegmentCode used on opensource projects

Example 1 with SegmentCode

use of jetbrick.template.parser.code.SegmentCode in project jetbrick-template-1x by subchen.

the class JetTemplateCodeVisitor method visitStop_directive.

@Override
public Code visitStop_directive(Stop_directiveContext ctx) {
    ExpressionContext expression = ctx.expression();
    String source;
    if (expression != null) {
        SegmentCode c = (SegmentCode) expression.accept(this);
        source = get_if_expression_source(c);
    } else {
        source = "true";
    }
    source = "if (" + source + ") return; // line: " + ctx.getStart().getLine();
    return scopeCode.createLineCode(source);
}

Example 2 with SegmentCode

use of jetbrick.template.parser.code.SegmentCode in project jetbrick-template-1x by subchen.

the class JetTemplateCodeVisitor method visitSet_expression.

@Override
public Code visitSet_expression(Set_expressionContext ctx) {
    String name = assert_java_identifier(ctx.IDENTIFIER(), true);
    SegmentCode code = (SegmentCode) ctx.expression().accept(this);
    // 是否同时定义一个变量
    boolean defining = false;
    // 变量类型
    TypedKlass lhs = null;
    TypeContext type = ctx.type();
    if (type != null) {
        defining = true;
        // 定义一个变量
        SegmentCode c = (SegmentCode) type.accept(this);
        lhs = c.getTypedKlass();
        if (!scopeCode.define(name, lhs)) {
            throw reportError("Duplicate local variable " + name, ctx.IDENTIFIER());
        }
    } else {
        // 直接赋值，如果变量没有定义，则先定义
        lhs = scopeCode.resolve(name, false);
        defining = (lhs == null);
        if (defining) {
            lhs = code.getTypedKlass();
            scopeCode.define(name, lhs);
        }
    }
    // 进行赋值语句类型检查
    if (!ClassUtils.isAssignable(lhs.getKlass(), code.getKlass())) {
        // 是否支持正常赋值
        if (!ClassUtils.isAssignable(code.getKlass(), lhs.getKlass())) {
            // 是否支持强制类型转换
            throw reportError("Type mismatch: cannot convert from " + code.getTypedKlass().toString() + " to " + lhs.toString(), ctx);
        }
    }
    BlockCode c = scopeCode.createBlockCode(2);
    String source = name + " = (" + lhs.getSource() + ") " + code.toString() + "; // line: " + ctx.getStart().getLine();
    if (defining) {
        source = lhs.getSource() + " " + source;
    }
    c.addLine(source);
    c.addLine(Code.CONTEXT_NAME + ".put(\"" + name + "\", " + name + ");");
    return c;
}

Example 3 with SegmentCode

use of jetbrick.template.parser.code.SegmentCode in project jetbrick-template-1x by subchen.

the class JetTemplateCodeVisitor method visitType_list.

@Override
public Code visitType_list(Type_listContext ctx) {
    List<Type_nameContext> type_name_list = ctx.type_name();
    SegmentListCode code = new SegmentListCode(type_name_list.size());
    for (Type_nameContext type_name : type_name_list) {
        Code c = type_name.accept(this);
        code.addChild((SegmentCode) c);
    }
    return code;
}

Example 4 with SegmentCode

use of jetbrick.template.parser.code.SegmentCode in project jetbrick-template-1x by subchen.

the class JetTemplateCodeVisitor method visitInclude_directive.

@Override
public Code visitInclude_directive(Include_directiveContext ctx) {
    Expression_listContext expression_list = ctx.expression_list();
    SegmentListCode childrenCode = (SegmentListCode) expression_list.accept(this);
    if (childrenCode.size() > 2) {
        throw reportError("Arguments mismatch for #include directive.", ctx);
    }
    // argument 1: file
    SegmentCode fileCode = childrenCode.getChild(0);
    ExpressionContext fileExpression = expression_list.expression(0);
    if (!String.class.equals(fileCode.getKlass())) {
        throw reportError("Type mismatch: the first argument cannot convert from " + fileCode.getKlassName() + " to String", fileExpression);
    }
    // argument 2: parameters
    SegmentCode parametersCode = null;
    if (childrenCode.size() > 1) {
        parametersCode = childrenCode.getChild(1);
        if (!(Map.class.equals(parametersCode.getKlass()))) {
            throw reportError("Type mismatch: the second argument cannot convert from " + parametersCode.getKlassName() + " to Map", expression_list.expression(1));
        }
    }
    // 如果 file 是常量，那么进行 file.exists() 校验
    if (fileExpression instanceof Expr_constantContext) {
        String file = fileCode.toString();
        file = file.substring(1, file.length() - 1);
        file = StringEscapeUtils.unescapeJava(file);
        file = PathUtils.getAbsolutionName(resource.getName(), file);
        if (!engine.lookupResource(file)) {
            throw reportError("FileNotFoundException: " + file, fileExpression);
        }
    }
    // 生成代码
    StringBuilder source = new StringBuilder();
    source.append("JetUtils.asInclude($ctx, ");
    source.append(fileCode.toString());
    source.append(", (Map<String, Object>)");
    source.append((parametersCode != null) ? parametersCode.toString() : "null");
    source.append("); // line: ");
    source.append(ctx.getStart().getLine());
    return scopeCode.createLineCode(source.toString());
}

Example 5 with SegmentCode

use of jetbrick.template.parser.code.SegmentCode in project jetbrick-template-1x by subchen.

the class JetTemplateCodeVisitor method visitExpr_math_binary_bitwise.

@Override
public Code visitExpr_math_binary_bitwise(Expr_math_binary_bitwiseContext ctx) {
    SegmentCode lhs = (SegmentCode) ctx.expression(0).accept(this);
    SegmentCode rhs = (SegmentCode) ctx.expression(1).accept(this);
    String op = ctx.getChild(1).getText();
    // 类型检查
    Class<?> resultKlass = PromotionUtils.get_binary_bitwise(lhs.getKlass(), rhs.getKlass(), op);
    if (resultKlass == null) {
        throw reportError("The BinaryOperator \"" + op + "\" is not applicable for the operands " + lhs.getKlassName() + " and " + rhs.getKlassName(), ctx);
    }
    String source = "(" + lhs.toString() + op + rhs.toString() + ")";
    return new SegmentCode(resultKlass, source, ctx);
}