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Revisit function block for return.

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Visit (with prefix and suffix) function block when executed.  This commit adds a revisit at the end of the function body when evaluating the return value.
This commit is contained in:
Neil Fraser
2019-05-14 16:10:42 -07:00
committed by Neil Fraser
parent c0e14c3a7c
commit 585866a1b6
5 changed files with 97 additions and 75 deletions
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34
generators/dart/procedures.js
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@@ -33,24 +33,28 @@ Blockly.Dart['procedures_defreturn'] = function(block) {
// Define a procedure with a return value.
var funcName = Blockly.Dart.variableDB_.getName(block.getFieldValue('NAME'),
Blockly.Procedures.NAME_TYPE);
var branch = Blockly.Dart.statementToCode(block, 'STACK');
if (Blockly.Dart.STATEMENT_SUFFIX) {
branch = Blockly.Dart.prefixLines(
Blockly.Dart.injectId(Blockly.Dart.STATEMENT_SUFFIX, block),
Blockly.Dart.INDENT) + branch;
}
if (Blockly.Dart.INFINITE_LOOP_TRAP) {
branch = Blockly.Dart.prefixLines(
Blockly.Dart.injectId(Blockly.Dart.INFINITE_LOOP_TRAP, block),
Blockly.Dart.INDENT) + branch;
}
var xfix1 = '';
if (Blockly.Dart.STATEMENT_PREFIX) {
branch = Blockly.Dart.prefixLines(
Blockly.Dart.injectId(Blockly.Dart.STATEMENT_PREFIX, block),
Blockly.Dart.INDENT) + branch;
xfix1 += Blockly.Dart.injectId(Blockly.Dart.STATEMENT_PREFIX, block);
}
if (Blockly.Dart.STATEMENT_SUFFIX) {
xfix1 += Blockly.Dart.injectId(Blockly.Dart.STATEMENT_SUFFIX, block);
}
xfix1 = Blockly.Dart.prefixLines(xfix1, Blockly.Dart.INDENT);
var loopTrap = '';
if (Blockly.Dart.INFINITE_LOOP_TRAP) {
loopTrap = Blockly.Dart.prefixLines(
Blockly.Dart.injectId(Blockly.Dart.INFINITE_LOOP_TRAP, block),
Blockly.Dart.INDENT);
}
var branch = Blockly.Dart.statementToCode(block, 'STACK');
var returnValue = Blockly.Dart.valueToCode(block, 'RETURN',
Blockly.Dart.ORDER_NONE) || '';
var xfix2 = '';
if (branch && returnValue) {
// After executing the function body, revisit this block for the return.
xfix2 = xfix1;
}
if (returnValue) {
returnValue = Blockly.Dart.INDENT + 'return ' + returnValue + ';\n';
}
@@ -61,7 +65,7 @@ Blockly.Dart['procedures_defreturn'] = function(block) {
Blockly.Variables.NAME_TYPE);
}
var code = returnType + ' ' + funcName + '(' + args.join(', ') + ') {\n' +
branch + returnValue + '}';
xfix1 + loopTrap + branch + xfix2 + returnValue + '}';
code = Blockly.Dart.scrub_(block, code);
// Add % so as not to collide with helper functions in definitions list.
Blockly.Dart.definitions_['%' + funcName] = code;