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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/python/procedures.js
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@@ -55,24 +55,28 @@ Blockly.Python['procedures_defreturn'] = function(block) {
Blockly.Python.INDENT + 'global ' + globals.join(', ') + '\n' : '';
var funcName = Blockly.Python.variableDB_.getName(
block.getFieldValue('NAME'), Blockly.Procedures.NAME_TYPE);
var branch = Blockly.Python.statementToCode(block, 'STACK');
if (Blockly.Python.STATEMENT_SUFFIX) {
branch = Blockly.Python.prefixLines(
Blockly.Python.injectId(Blockly.Python.STATEMENT_SUFFIX, block),
Blockly.Python.INDENT) + branch;
}
if (Blockly.Python.INFINITE_LOOP_TRAP) {
branch = Blockly.Python.prefixLines(
Blockly.Python.injectId(Blockly.Python.INFINITE_LOOP_TRAP, block),
Blockly.Python.INDENT) + branch;
}
var xfix1 = '';
if (Blockly.Python.STATEMENT_PREFIX) {
branch = Blockly.Python.prefixLines(
Blockly.Python.injectId(Blockly.Python.STATEMENT_PREFIX, block),
Blockly.Python.INDENT) + branch;
xfix1 += Blockly.Python.injectId(Blockly.Python.STATEMENT_PREFIX, block);
}
if (Blockly.Python.STATEMENT_SUFFIX) {
xfix1 += Blockly.Python.injectId(Blockly.Python.STATEMENT_SUFFIX, block);
}
xfix1 = Blockly.Python.prefixLines(xfix1, Blockly.Python.INDENT);
var loopTrap = '';
if (Blockly.Python.INFINITE_LOOP_TRAP) {
loopTrap = Blockly.Python.prefixLines(
Blockly.Python.injectId(Blockly.Python.INFINITE_LOOP_TRAP, block),
Blockly.Python.INDENT);
}
var branch = Blockly.Python.statementToCode(block, 'STACK');
var returnValue = Blockly.Python.valueToCode(block, 'RETURN',
Blockly.Python.ORDER_NONE) || '';
var xfix2 = '';
if (branch && returnValue) {
// After executing the function body, revisit this block for the return.
xfix2 = xfix1;
}
if (returnValue) {
returnValue = Blockly.Python.INDENT + 'return ' + returnValue + '\n';
} else if (!branch) {
@@ -84,7 +88,7 @@ Blockly.Python['procedures_defreturn'] = function(block) {
Blockly.Variables.NAME_TYPE);
}
var code = 'def ' + funcName + '(' + args.join(', ') + '):\n' +
globals + branch + returnValue;
globals + xfix1 + loopTrap + branch + xfix2 + returnValue;
code = Blockly.Python.scrub_(block, code);
// Add % so as not to collide with helper functions in definitions list.
Blockly.Python.definitions_['%' + funcName] = code;