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yul_mapping.ts
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yul_mapping.ts
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import { YulNode } from "../implementation/statement/inline_assembly";
import { YulNodeWriter, YulWriter } from "./writer";
class YulBlockWriter implements YulNodeWriter {
write(node: YulNode, writer: YulWriter): string {
if (node.statements.length === 0) {
return "{}";
}
const formatter = writer.formatter;
formatter.increaseNesting();
const statements = node.statements.map(
(stmt: YulNode) => formatter.renderIndent() + writer.write(stmt)
);
formatter.decreaseNesting();
const wrap = formatter.renderWrap();
const indent = formatter.renderIndent();
return "{" + wrap + statements.join(wrap) + wrap + indent + "}";
}
}
class YulLiteralWriter implements YulNodeWriter {
write(node: YulNode): string {
let result;
if (node.kind === "string") {
if ("value" in node) {
result = JSON.stringify(node.value);
} else if ("hexValue" in node) {
result = `hex"${node.hexValue}"`;
} else {
throw new Error("Unable to pick string YulLiteral value: " + JSON.stringify(node));
}
} else {
result = node.value;
}
return node.type !== "" ? result + ":" + node.type : result;
}
}
class YulIdentifierWriter implements YulNodeWriter {
write(node: YulNode): string {
return node.name;
}
}
class YulTypedNameWriter implements YulNodeWriter {
write(node: YulNode): string {
return node.type !== "" ? node.name + ":" + node.type : node.name;
}
}
class YulFunctionCallWriter implements YulNodeWriter {
write(node: YulNode, writer: YulWriter): string {
const id = writer.write(node.functionName);
const args = node.arguments.map((arg: YulNode) => writer.write(arg));
return id + "(" + args.join(", ") + ")";
}
}
class YulVariableDeclarationWriter implements YulNodeWriter {
write(node: YulNode, writer: YulWriter): string {
const vars = node.variables.map((v: YulNode) => writer.write(v));
const rhs = node.value === null ? undefined : writer.write(node.value);
const lhs = "let " + vars.join(", ");
return rhs !== undefined ? lhs + " := " + rhs : lhs;
}
}
class YulExpressionStatementWriter implements YulNodeWriter {
write(node: YulNode, writer: YulWriter): string {
return writer.write(node.expression);
}
}
class YulAssignmentWriter implements YulNodeWriter {
write(node: YulNode, writer: YulWriter): string {
const lhs = node.variableNames.map((v: YulNode) => writer.write(v));
const rhs = writer.write(node.value);
return lhs.join(", ") + " := " + rhs;
}
}
class YulIfWriter implements YulNodeWriter {
write(node: YulNode, writer: YulWriter): string {
const condition = writer.write(node.condition);
const body = writer.write(node.body);
return "if " + condition + " " + body;
}
}
class YulCaseWriter implements YulNodeWriter {
write(node: YulNode, writer: YulWriter): string {
const body = writer.write(node.body);
if (node.value === "default") {
return "default " + body;
}
const value = writer.write(node.value);
return "case " + value + " " + body;
}
}
class YulSwitchWriter implements YulNodeWriter {
write(node: YulNode, writer: YulWriter): string {
const expression = writer.write(node.expression);
const formatter = writer.formatter;
const cases = node.cases.map(
(clause: YulNode) => formatter.renderIndent() + writer.write(clause)
);
const wrap = formatter.renderWrap();
return "switch " + expression + wrap + cases.join(wrap);
}
}
class YulContinueWriter implements YulNodeWriter {
write(): string {
return "continue";
}
}
class YulBreakWriter implements YulNodeWriter {
write(): string {
return "break";
}
}
class YulLeaveWriter implements YulNodeWriter {
write(): string {
return "leave";
}
}
class YulForLoopWriter implements YulNodeWriter {
write(node: YulNode, writer: YulWriter): string {
const pre = writer.write(node.pre);
const condition = writer.write(node.condition);
const post = writer.write(node.post);
const body = writer.write(node.body);
return `for ${pre} ${condition} ${post} ${body}`;
}
}
class YulFunctionDefinitionWriter implements YulNodeWriter {
write(node: YulNode, writer: YulWriter): string {
const args = node.parameters
? node.parameters.map((arg: any) => writer.write(arg))
: undefined;
const rets = node.returnVariables
? node.returnVariables.map((v: any) => writer.write(v))
: undefined;
const body = writer.write(node.body);
const definition = ["function", node.name];
definition.push(args ? "(" + args.join(", ") + ")" : "()");
if (rets) {
definition.push("-> " + rets.join(", "));
}
definition.push(body);
return definition.join(" ");
}
}
export const DefaultYulWriterMapping = new Map<string, YulNodeWriter>([
["YulBlock", new YulBlockWriter()],
["YulLiteral", new YulLiteralWriter()],
["YulIdentifier", new YulIdentifierWriter()],
["YulTypedName", new YulTypedNameWriter()],
["YulFunctionCall", new YulFunctionCallWriter()],
["YulVariableDeclaration", new YulVariableDeclarationWriter()],
["YulExpressionStatement", new YulExpressionStatementWriter()],
["YulAssignment", new YulAssignmentWriter()],
["YulIf", new YulIfWriter()],
["YulCase", new YulCaseWriter()],
["YulSwitch", new YulSwitchWriter()],
["YulContinue", new YulContinueWriter()],
["YulBreak", new YulBreakWriter()],
["YulLeave", new YulLeaveWriter()],
["YulForLoop", new YulForLoopWriter()],
["YulFunctionDefinition", new YulFunctionDefinitionWriter()]
]);